ICS71.120  83.200  
G95  
 
National Standard f or the People’s Republic of China  
GB××××× —200×  
Safety Requirements for Rubber Calenders & Plastics Calenders  
  
(Draft for Approval)  
 
 
 
 
 
 
 
 
 
Release d on ××/××/200 ×                  Implemented on ×× /××/200 × 
Issued by  
 
General Administration of Quality Supervision,  
Inspection and Quarantine of the People’s Republic of China  
Standardization Administration of the People’s Republic of China  
 
 GB××××× —200× 
TABLE OF CONTENTS  
Introduction ................................ ................................ ................................ ................................ ................................ ........ 3 
1. Scope ................................ ................................ ................................ ................................ ................................ ......... 4 
2. Normative references ................................ ................................ ................................ ................................ ................ 4 
3. Terms  and Definitions ................................ ................................ ................................ ................................ ............... 6 
4. Risk examples ................................ ................................ ................................ ................................ ......................... 10 
4.1 Mechanical risk ................................ ................................ ................................ ................................ .......................... 10 
4.2 Electrical Risk ................................ ................................ ................................ ................................ .................... 11 
4.3 Heat risk ................................ ................................ ................................ ................................ .............................. 11 
4.4 Noise Risk ................................ ................................ ................................ ................................ .......................... 11 
4.5 Risk Caus ed by Ignoring the Ergonomic Principles ................................ ................................ ................................ ...11 
4.6 Risk Caused by Power Supply Failure ................................ ................................ ................................ ....................... 11 
4.7 Risk Caused by Control System Failure ................................ ................................ ................................ ..................... 11 
4.8 Slip, Trip and Fall Risks ................................ ................................ ................................ ................................ ............. 11 
5. Safety Requirements and Measures ................................ ................................ ................................ ........................ 12 
5.1 Safety Requirements and Measures of Mechanical Risks ................................ ................................ .......................... 12 
5.2 Safety Requirements and Measures of Electrical Risk ................................ ................................ ............................... 22 
5.3 S afety Requirements and Measures of Heat Risk ................................ ................................ ................................ ......23 
5.4 Safety Requirements and Measures of Noise Risk ................................ ................................ ................................ .....23 
5.5 Safety Requirements and Measures of Risk Caused by Ignoring the Ergonomic Principles ................................ .....24 
5.6 Safety Requirements and Measures of Risk Caused by Power Failure ................................ ................................ ......24 
5.7 Safety Requirements and Measures of Risk Caused by Control System Failure ................................ ....................... 24 
5.8 Safety Requirements and Measures of Slip, Trip and Fall Risk ................................ ................................ ................. 25 
6. Certification of Safety Requirements and Measures ................................ ................................ ............................... 25 
7. Operation Information ................................ ................................ ................................ ................................ ............. 28 
7.1 Operating Instruc tions ................................ ................................ ................................ ................................ ................ 28 
7.2 Labels ................................ ................................ ................................ ................................ ................................ ......... 30 
Annex A(Informative annex)Examples of different types of calenders ................................ ................................ ........... 31 
Annex B  (Informative annex)  Examples of calendering technologies ................................ ................................ ............. 32 
Annex C(Informative annex)The risk caused by processing materials ................................ ................................ ............ 34 
Annex D  (Informative annex)  Calculation of the Suction Area Size (to rollers with the same diameter) ....................... 35 
Annex E  (Informative annex)  Fixed protective device of t he suction zone ................................ ................................ .....36 
Annex F(Informative annex)  Example of Special Protection by Restricting Movement to Prevent Entering into the 
Suction Area ................................ ................................ ................................ ................................ ................................ .....37 
Annex G ................................ ................................ ................................ ................................ ................................ ........... 38 
 
 
 
 
 
  
Introduction  
 
Chapter 5 [(except for 5.1.1.9e)], Chapter 6 and Chapter 7 [(except for 7.1.1e ,7.1.2j), 
7.1.2k) and 7.1.2m)] of the standard are mandatory , others are recommendatory. The 
modified version of the standard applies the European Standard EN 12301 2000 Safety 
Requirements for Rubber & Plastics Machine - Calenders  (English Version).  
The standard has some technical discrepancies caused by citing the national Chinese 
standard; please see Annex G for Check List for Relevant Standards Quoted in the 
Standard. For ease of use, the standard has made the following editorial modifications:  
a) subs tituted “European standard Introduction” with “Introduction”;  
b) substituted “European standard” with “standard”;  
c) deleted the introduction of EN 12301 2000;  
d) deleted the informative annex ZA of EN 12301 2000;  
e) deleted “References”;  
fadded Annex G.  
The Annexes A, B, C, D, E, F and G are informative.  
The standard was put forward by China Petroleum and Chemical Industry Association.  
The jurisdict ional unit of the standard is National Rubber & Plastics Machine 
Standardi sation Technical Committees (SAC/TC71).  
The major organis ations that participated in the drafting of this standard are Dalian Rubber 
& Plastics Machinery Corporation Limited and Bei jing Research and Design Institute of 
Rubber Industry.  
The major drafters of the standard are Huang Shulin, Li Xianglan, Yang Youren, Xia 
Xiangxiu and He Cheng.  GB××××× —200× 
Safety Requirements for Rubber Calenders & Plastics Calenders  
1. Scope  
The standard prescribes t he safety requirements for rubber and plastics calend ers.  
The standard involves the definition, risk examples, safety requirements and measures, certification of 
safety requirements and measures and operation information in Safety Requirements for Rubber & 
Plastics Machine - Calenders .  
The standard is applicable to calenders for processing rubbers and plastics (hereinafter referred to as 
“calenders”, including all the components fixed on the machine frame.  
The standard is not applicable to:  
--- Two -roll calenders and extruders (roll end)  
--- Two -roll or three -roll calendering, la minating or embossing equipment  (not the calenders), which a re 
used as downstream equipment  of the excluder in the film membrane production line.  
The standard does  not include t he following risks:  
---risk caused by the processed materials (see Informative Annex C);  
---risk caused by processing explosive materials or materials liable  to create explosive gas;  
---fire ignition risk caused by touching the heat components of the calen ders with explosive materials 
(e.g., fuel leaks);  
---risk caused by electromagnetic, laser or ioni sing radiation;  
---risk caused by installing the calenders in an explosive environment.  
2. Normative references   
The terms in the following documents become the  terms of the standard by quoting it. For the quoted 
documents marked with date, all the modified lists follow ing it (this does  not include errors) or the 
modified version is not applicable to the standard. However, it is encouraged that the parties agree 
according to the standard to use the latest version of the documents. For the quoted documents not 
marked with date, the latest version is applicable to the standard.  
GB 1251.1  Ergonomics - Danger signals for public and work areas - Auditory danger  signal sGB 
1251.1  2008  ISO 7731 2003 IDT  
GB/T 3767 Acoustics --Determination of sound power levels of noise sources using sound 
pressure -engineering methods in an essentially free field over a reflecting plane GB/T 3767 1996 
equiv ISO 3744 1994  
GB/T 3768 Acoustics -Determination of sound power levels of noise sources using sound 
pressure -Survey method using an enveloping measurement surface over a reflecting plane  
GB/T 3768 1996 equiv ISO 3746 1995  
GB 4208 -2008 Degrees of protection provided by enclosure ( IP code) IEC 60529 2001IDT  
GB 5226.1 2002 Safety of machinery —Electrical equipment of machines —Part 1: General 
Requirements IEC 60204 -12000IDT  
GB/T 6881.2 2002 Acoustics --Determination of sound power levels of noise sources —Engineering  
methods for small, movable sources in reverberant field --Part 1: Comparison method for hard -walled 
test rooms ISO 3743 -11994IDT  
GB/ T6881.3 2002 Acoustics --Determination of sound power levels of noise sources -using sound GB××××× —200× 
pressure -Engineering methods for small, mov able sources in reverberant field --Part 2: Methods for 
special reverberation test ISO 3743 -21994IDT  
GB/T 8196 2003 Safety of machinery —Guards —General requirements for the design and construction 
of fixed and movable guards ISO 14120 2002MOD   
GB 1226 5.11997 Safety of machinery --safety distances to prevent danger zones being reached by the 
upper limbs  
GB 12265.3 1997 Safety of machinery -Minimum gaps to avoid crushing of parts of the human body  
GB/T 14574 Acoustics -Declaration and verification of noise  emission values of machinery and 
equipment GB/T 14574 2000 equiv ISO 4871 1996  
GB/T 15706.1 2007 Safety of machinery  Basic concepts general principles for design  Part 1: 
Basic terminology methodology ISO 12100 -1 2003 IDT  
GB/T 15706.2 2007 Safety of  machinery -Basic concepts general principles for design -Part 2: 
Technical principles ISO 12100 -22003 IDT 
GB/T16404 1996 Acoustics -Determination of sound power levels of noise sources using sound 
intensity —Part 1: Measurement at discrete points equiv ISO  9614 -11993  
GB/T16404 .2199 9 Acoustics —Determination of sound power levels of noise sources using sound 
intensity —Part 2 Measurement by scanning equiv ISO 9614 -21996  
 GB/T 16538 Acoustics - Determination of sound power levels of noise sources using s ound pressure - 
Comparison method in situ GB/T 16538 2008 ISO 3747 2000IDT  
GB/ T 16754 2008 Safety of machinery —Emergency stop Principles for design  ISO 13850 1995
IDT  
GB/T 16855.1 2005 Safety of machinery --Safety -related parts of control systems -Part1: General 
principles for design ISO 13849 -11999MOD   
GB/T17248.2 1999 Acoustics --Noise emitted by machinery and equipment --Measurement of emission 
sound pressure levels at a workstation and at other specified positions --Engineering method in an 
essenti ally free field over a reflecting plane equiv ISO 11201 1995 
GB/T17248. 31999 Acoustics --Noise emitted by machinery and equipment -Measurement of emission 
sound pressure levels at a workstation and at other specified positions -Survey method in situ equiv I SO 
11202 1995 
GB/T17248.4 1998 Acoustics --Noise emitted by machinery and equipment --Determination of 
emission sound pressure level at a workstation and at other specified position s from the sound power 
levelequiv ISO 11203 1995  
GB/T17248.5 1999 Acousti cs--Noise emitted by machinery and equipment --Measurement of emission 
sound pressure levels at a workstation and at other specified positions --Method requiring environmental 
corrections equiv ISO 11204 1995  
GB/T 17454.1 1998 Safety of machinery -Pressure sensitive protective device -Part 1: General 
principles for the design and testing of pressure sensing mats and pressure sensing floors  
GB/T 17888.1 Safety of machinery - Permanent means of access to machinery - Part 1: Choice of a fixed 
means of access bet ween two levels GB/T 17888.1 2008  ISO 14122 -12001IDT  
GB/T 17888.2 Safety of machinery - Permanent means of access to machinery - Part 2: Working 
platforms and walkways GB/T 17888.2 2008 ISO 14122 -22001IDT  
GB/T 17888.3 Safety of machinery - Permanent means of ac cess to machinery - Part 3 : Stairs, 
stepladders and guard railsGB/T 17888.3 2008 ISO 14122 -32001IDT  GB××××× —200× 
GB/T 17888.4 Safety of machinery - Permanent means of access to machinery - Part 4: Fixed ladders
GB/T 17888.4 2008   
ISO 14122 -42004IDT GB/T 18153 -2000 Safety of machinery --Temperatures of touchable 
surfaces --Ergonomics data to establish temperature limit values for hot surfaces GB/T 18209.1 Safety of 
machinery --Indication, marking and actuation --Part 1:Requirements for visual, auditory and tactile 
signals GB/T 18209.1 2000 IEC 61310 -11995IDT 
GB/T 18831 2002 Safety of machinery --Interlocking devices associated with guards --Principles for 
design and selection (ISO 14199 1998MOD)  
GB/T 19436.1 2004 Electrical safety of machinery —Electro -sensitive protecti ve equipment —Part 1: 
General requirements and test s IEC 61496 -11997IDT  
GB/T 19670 Safety of machinery --Prevention of unexpected start -up (GB/T 19670 2000 ISO 14118 
2000MOD)  
GB/T 19876 2005 Safety of machinery --Positioning of protective equipment with  respect to the 
approach speeds of parts of the human body (ISO 13855 2002MOD)  
EN 614 -l1995 Safety of machinery ergonomics Principles for design Part I: Basic terminology and 
general principles  
ISO 11688 -11998 Acoustics — Recommended practice for the des ign of low -noise machinery and 
equipment Part I: planning  
ISO 11688 -21999 Acoustics —Recommended practice for the design of low-noise machinery and 
equipment Part II: Introduction to the physics of low -noise design.  
 
3. Terms and Definition s 
The following ter ms and definition s are applicable to this standard.  
3.1  
Calender  
The machine that is used to process rubber, plastics, mucilage or dispersoid by stretching the 
materials between two or more rolls. The two ends of the rolls are supported by the machine fr ame.  
Examples of possible operating process es: 
—— Sheet materials or section materials for calendering rubber and plastics;  
—— Sending one piece (layer) or more pieces (layers) to the conveyer belt;  
—— Using heat or adhesive to laminate two or more layers of  rubber or plastic sheet materials.  
—— Plastic printing.  
Table 1 shows a typical calendering process, position of most components and the partition of each 
zone. The labels in the chart relate to the corresponding sub -item number in Chapter 3.  
 GB××××× —200× 
 
 
 
 
3.2Machine frame;     3.3 Calendering roll; 3.4 Secondary roll   
3.5.1Cutting device;  3.5.2 flaps 3.5.3 feeding device;  
3.8roll gap adjusting device   3.9feeding zone; 3.10 discharging zone   
3.11working zone; 3.12 suction zone of the cale ndering rolls.  
Chart 1 Fibre hangings (fabrics or wire netting) Example of four -roll calender processing 
materials with double -surface painting technology  
3.2  
Frame  
Components used by the calenders to fix calendering roll bearing, some secondary rolling and secondary 
devices.   
3.3  
Calender roll   
Rolls with a smooth surface, processed by surface polishing or abrasive blasting. They are supported 
in the air and located by the direct bearing on the frame, according to the relationship between the rolls. 
Holes can be bored on the rolls to control their temperature by fluid circulation.  
3.4  Rubber/plastics line  
Cord ya rn/hangings line  
Calendering products line  GB××××× —200× 
Auxiliary roller  
The roll used in the calende ring technology, different from the c alender ing rolls. It can be driven and 
the temperature  of it can be adjusted . Types of auxiliary roller include pressure roll, painting roll, 
drawing directing roll, tension roll, stripping roll, flattening roll, dragging roll and so on.  
3.5  
Auxiliary equipment  
The following auxiliary equipment is introduced in the standard:  
 
3.5.1  
Cutting  equipment  
Cut the edge of the sheet material and finish it to a certain width. The material can be cut into two or 
more width dimensions; the following are examples of different types of cutting devices:  
—— Fixed knife (metal wire or blade);  
—— Rotary knif e (cutting plate).  
3.5.2  
Flaps  
Baffle s fixed on both sides of the feeding zone to determine the width of the calendered sheet, limit 
the place ment  of the material and prevent the materials from exceeding the normal operating zone.  
3.5.3  
Feeding device  
The devices used to in sert and distribute materials in the feeding zone, such as work bench, grid, 
charging groove or alternate conveyer types.  
3.6  
Calender roll velocity  
The unit of the linear velocity of the roll V is m/ min. The following velocities shal l be used in the 
standard:  
—— Low roll velocity V 1 when starting manufacture;  
—— The maximal roll velocity V max provided by the manufacturer;  
—— Normal manufacture velocity V p, which is between V 1 and V max; 
—— Step-down roll velocity V r, the roll velocity when  the operator is required to approach the roll 
in the manufacturing process.  
3.7  
Parking angle  
The angle created during the time when the high -speed calender roll starts the safety device or 
emergency stop device  until the roll stops.  
The angle is measur ed when the calender is idling  and the roll is rotating in Vmax (see 3.6).  
The following parking angles shall be used in the standard:  
—— given parking angle : the parking angle given by the machine manufacturer;  
—— the maximal parking angle max: the upper value of the parking angle;  
—— step-down parking angle r: the parking angle acquired when the roll is rotating in the 
step-down roll velocity V r.  
3.8 
Roll gap adjusting device  
Device to change the relative position of the rolls by increasing or decreasing the roll gap.  
3.9  GB××××× —200× 
Feeding zone  
The zone where material (rubber or plastics) or other items (hangings, textiles and fabrics) are fed 
into the calenders.  There can be one or more feeding zones on one calender.  
3.10  
Discharge zone  
The zone where calendering products are discharged.  
3.11  
Working zone  
The area where the operator carries out the normal operation. There can be one or more operation 
zones on  one calender.  
3.12 Suction zone at the calender rolls  
Suction zone means the zone that gets easily entangled and ground when two calendering rolls approach 
each other and relatively rotate toward the roll gap. Suction zone also means the space enclosed b y the 
length L of roll and cross -sectional dimension S and L (see Chart 2):  
When the rolls theoretically approach each other, 12mm is adopted, and the diameter of the roll is not 
considered;  
 L= 
  When the diameters D of the two rolls are different, the bigger one shall be adopted. A 
formula to calculate L is given in Annex D  
No matter how large the roll gap is, L is always unchangeable.  
 
X, S and L: specify  the dimension of the suction zone  
Chart 2 Suction zone of calendering rolls  
3.13  
Danger zone at  the calender rolls  
A danger zone will exist on the calender roll when en tering into the suction zone described in 3.12 
which  protective devices installed near the centre of the zone cannot  prevent .  
The danger zone is located in the side of the roll, a space enclosed by the roll length X and shadow GB××××× —200× 
section (see Chart 3 and 7a) .  
The part is decided by the following dimensions:  
the straight line size S at the entry of the suction zone (see 3.12);  
two circular arcs on the calender rolls determined by the given parking angle  (see 3.7);  
the circle centre of the bigger circular arc is the midpoint of straight line dimension S , its radius 
F is the arc length on the calender rolls determined by the given parking angle . 
 
Chart 3 Danger zone of calendering rolls  
4. Risk examples  
4.1 Mechanical risk  
In Chart 4, a four -roll calender is used as an example; the location of the major mechanical risk is 
pointed out. The labels in the chart correspond to the sub -item number in Chapter 4.  
 GB××××× —200× 
Chart 4 Taking a four -roll calender as  an example, the location of major mechanical risk  
4.1.l Entangling and grinding risks between the calendering rolls or between the calendering rolls 
and materials  
The risks can be caused by the following  
when starting;  
when it operates toward the positive direction in normal operation;  
toward the reverse;  
in cleaning or clear -up operation s; 
in setting, process transferring, fault clearance and maintenance operations.  
4.1.2  Entangling and grinding risks between the auxiliary rolls  
4.1.3  Risk caused by  auxiliary equipment  
4.1.3.1   Cutting risk caused by cutting device.  
4.1.3.2  Cutting and grinding risks between flaps and calendering rolls.  
4.1.3.3   Impacting and extruding risks caused by alternate feeding conveyer.  
4.2  Electrical Risk  
4.2.1 Electric shock or burn caused by directly or indirectly touching the conductive parts.  
4.2.2 Electric shock or fire caused by electrostatic charge.  
4.3  Heat risk  
4.3.1 Burns caused by touching the heat components of calender or other hot materials.  
4.3.2 Scalding caused by hose or hose component cracking and hot conducting liquid ejects.  
4.3.3 Burns caused by infrared radiation.  
4.4  Noise Risk  
Risk caused by noise, such as hearing  impairment, language communication interference or hearing 
influence.  
4.5 Risk Caused by Ignoring th e Ergonomic Principles  
Risk caused by overusing human resources in replacing the painting roll or roller.  
4.6 Risk Caused by Power Supply Failure  
Entangling and grinding risks caused by safety device fault and power supply failure.  
4.7 Risk Caused by Con trol System Failure  
Mechanical risk caused by malfunction of safety related components of the control  system.  
The risk can be caused by the following:  
unexpected start;  
control mode failure, including setting, start, process transferring, cleaning, fa ult clearance, 
maintenance and reverse operation;  
unexpected velocity change;  
failure of one or more safety devices.  
4.8 Slip, Trip and Fall Risks  
Slip, trip and fall risks caused when operators are on, going to or leaving the operating zone.  GB××××× —200× 
5. Safety  Requirements and Measures  
5.1 Safety Requirements and Measures of Mechanical Risks  
5.1.1 Risks on the calendering roller  
5.1.1.1 Place safety protection at the entry of the suction zone to avoid e ntering into the suction 
zone described in 3.12  
 
At least one of the following options must be adopted to avoid entering into the suction area:  
a) according to the requirements in  3.2 of GB/T 8196 2003, a fixed protective device shall be set 
along the whole roll. The device shall conform to the following principle:  
The distance between the protection and the surface of the roller shall be no more than 6mm;  
the angle between th e protection and the section of the roller shall be no less than 90°.  
The layout examples are provided in Informative Annexes E and F. The examples can be adopted 
in other layouts besides the circle cross section. For protective devices with an opening, th e safe 
distance shall be determined according to Table 3 or Table 4 in GB 12265.1 1997. If the protective 
device needs to be moved away (for reasons like cleaning or setting), it shall be designed with an 
interlock protection pattern with a protective lock (according to the requirements in 3.6 of GB/T 
8196 2003).  
b) Position the feedin g device to make it serve as a fixed protection mentioned  aboved . An 
interlock must be equipped, which   ensures that the roller can rotate only when the feeding device 
is properly located.  
5.1.1.2 Place protection outside the suction zone to avoid enteri ng it  
When the protective methods introduced in 5.1.1 .1 canno t be adopted because of processing 
reasons, at least one of the following measures shall be adopted to avoid entering into the suction zone:  
a) Protective device to avoid entering into the suctio n zone  
 According to the requirements in 3.6 of GB/T 81962003, 3.6, interlocking devices associated 
with guards shall be applied;  
 according to the interlock protection requirements in 3.5 of GB/T 81962003, it must be 
located according to GB/T 19876 2005;  
the type of interlock protection device shall be selected according to GB/T 18831 2002.  
b) Roller -stop tripping device:  
machine -driven tripping device:  
1) tripping bar (see 5.1.1.4);  
2) Other devices, such as voltage -dependent mat selected acco rding to GB/T 17454.1 1998 and 
located according to GB/T 19876 2005.  
Non-machine -driven tripping device, such as light -electricity device according to GB/T 
19436.1 2004 and located according to GB/T 198762005.  
The distance calculated according to GB/T  19876 2005 shall be measured from the entry of the 
suction area.  
If an interlock protection device or a non -machine -driven tripping device has been located, but the 
operator can still stand between the protective device or tripping device and calender, o ther safe 
measures (such as the sensitive protective device) must be taken to prevent the operator from taking 
the risk when standing there.  GB××××× —200× 
 
5.1.1.3 The performance of protection and safety device s is listed in 5.1.1.2  
5.1.1.3.1 Stop of the calendering ro ller 
Intentionally  or unintentionally, once the interlock protection is open or tripping device is started, in the 
parking angle described in 3.7, the roller must stop  when any part of the operator ’s body touches the 
safety device.  
Once the fingers of th e operator touch the danger zone described in 3.13, the brake shall start 
immediately; the roller shall stop before the fingers touch the suction zone described in 3.12  (see chart 5a, 
5b, 5c) .  
If the power fails during braking, the roller shall stop in th e maximal parking angle max(120) (see 3.7). 
When the maximal velo city of the calendering roller V max (see 3.6) exceeds 120 m/ min, max may 
increase to the maximal value (160 ) with the increase of V max.  
For example, when the maximal velo city of the calendering roller V max=140 mmin, then  
 
When the speed exceeds 160 m min, the roller can not stop when the angle is equal to or smaller than 
160. In this case, an interlock protection with protective lock shall be used.  
Also see 7.1.1 b and 7.1.2 a . 
 
1calendering roller; 2 suction zone; 3 danger zone; 4 tripping bar; 5 operator.  
Chart 5a The operator’s fingers are outside the danger zone  GB××××× —200× 
 
 
Chart 5b The finger tips are in the danger zone:                     Chart 5c The fingertips are in the suction zone : 
Brake because the  body of the operator starts the tripping bar                      calendering machine has stopped  
 
Chart 5 Brake the calendering machine by starting the tripping device (when the tripping bar described in  
5.1.1.4 is used)  
 
5.1.1.3.2 Roller separation  
Intentionally or unintentionally, when the tripping device is started or the roller separation interlock 
protection is open, the rollers shall separate after the c alender ing rollers stop. The following methods can 
be used:  
—— Automatically; or  
—— use a specific  manual control method, which can act without being manually reset. The quicker the 
rollers separate, the better; the larger the distance is, the better (no less than 30mm).  
Roller separation shall not create extra risks. After the separation, the roller s hall stay in the open 
position, without the possibility of being unintentionally closed. It can only be removed manually.  
See 5.6.  
Note: A device can be provided so that the operator can use it to stop the automatic separation of the 
roller s.  
 
5.1.1.3.3  Reverse assistant action  
Because of the opening of the interlock protection or intentional /unintentional start of the tripping 
device, the calendering roller will stop subsequently. By starting a special stop -move controlling device 
(according to the requ irements in 3.26.3 of GB/T 15706.1 2007), a reverse movement of the rollers 
can be carried out. The goal is to rescue those who are entangled in the rollers or between the roller and 
the materials.  
It is not necessary to manually restart the controlling device or depend on the methods to select the 
position of the switch (introduced in 5.1.1.7) to make it effective. “Reverse assistant action” shall be 
labelled clearly on it. The velocity of the reverse motion of the roller shall be no more than 5 m/ min. 
Once the manual control stops, reve rse assistant action will stop because of the brake. The visual and 
acoustic warning signals are given in 5.1.1.7 and 5.1.1.8.  
See 7.1.2 b).  GB××××× —200× 
 
5.1.1.4 Application of bar -type mechanical -driven tripping device  
5.1.1.4.1 Function  
The tripping bar is a horiz ontal  stiffener, when any part of the body touches it intentionally or 
unintentionally, it will:  
—— stop the calendering rollers as described in 5.1.1.3.1;  
—— separate or allow the separation of the rollers as described in 5.1.1.3.2; and  
—— allow the roller to reversely operate as described in 5.1.1.3.3.  
The tripping bar shall meet the following requirements:  
—— when the operator’s body moves toward the roller for a displacement no more than 10mm, the 
tripping bar shall be started; the reaction time of the ba r t1 shall be less than 50ms (according to the 
requirements in 3.2 of GB/T 19876 -2005);  
—— The force required by the driven bar shall be no more than 200N;  
—— When the “push” action happens along the bar, the bar has a displacement of 10mm to 
implement the stop action for at least one place ment  of sensor (see the requirements in 5.1 of GB/ T 
18831 2002);  
—— The signals transmitted through the sensors on the positions are controlled by the hardware 
system, the circuit of which is composed of the electrical hardware;  
—— Restart shall not be caused when the tripping bar resets.  
See 7.1.2 a) and 7.1.2 d ). 
To avoid entering into the suction zone from beneath  the tripping bar, a fixed protective plate shall be 
used to provide protection. The design of the plate shall prevent the feet from stepping  into the suction 
zone .  
Also , on the working side, from the  side of the calender to the end of each roller, side protection shall be 
set according to the safe distance in Tables 2, 3, and 4 of GB 12256.1 1997.  
5.1.1.4.2 Positioning  
The tripping bar shall be extended to the whole length of the roller.  
It shall be installed at a height that is no lower than 1150mm from the horizontal plane. The plane is the 
standing surface of the operator and positioned according to Chart 6.  GB××××× —200× 
 
1---Tripping bar (at the stop position);  
L---The depth of the suction zone (see 3.12 and Annex D);  
F---The length is equal to the stop arc of the Vmax.  (Linear dimension, the unit is mm; the unit of   is radian).  
Chart 6 Position o f the tripping bar  
5.l.l.5 Decreasing the danger zone described in 3.13  
—— By reducing the roller velocity from V max to V p or V r (see 3.6), the danger zone can be reduced. 
The parking angle  is also reduced to r. The danger zone is shown in Chart 7b . 
 
 
 Fthe arc length of      Frthe arc length of r  
 
 
 (the unit of  is  degree)                                                  
 (the unit of r is degree)  
 
  (the unit of  i s degree)                                                  
 (the unit of  r is degree)  
1 Suction zone; 2  danger zone; 3  approach point required; 4  reduced danger zone.    
 Chart 7a Dimension of the danger zone   Chart 7b Dimension of the reduced danger zone  GB××××× —200× 
Chart 7 Danger zone  and reduc tion of the danger zone  
—— Combining the t wo safety devices shown in Chart 8 can avoid entering into the reduced danger zone.  
 
1—— Safety device 1 (the farther device, protective or safety device introduced in 5.1.1.2);  
2—— Safety device 2 (the nearer device, tripping bar introduced in 5.1.1.4).  
I Zone —— Free zone, the body is inside the zone, but the upper arm can not extend to the IV Zone;  
II Zone —— When the roller moves with low velocity Vr, the body is allowed to be inside the zone;  
III Zone —— When the roller moves with a velocity great er than Vr, the upper arm is allowed to be inside the zone;  
IV Zone —— Danger zone (3.13), when the roller moves with reduced velocity Vr, the upper arm is allowed to 
extend to the zone;  
V Zone —— reduced danger zone, in each case, it is not permitted to enter into this  zone.  
Chart 8 The combination of the two safety devices  
The combined safety device shall have the following functions:  
—— When the roller rotates with a velocity larger than V r, the operator can move from I Zone to II 
Zone to drive the safety device to sto p the calendering roller. When the roller rotates with the velocity 
Vr, the operator shall move from I Zone to II Zone without giving the stop command.  
—— When the upper arm reaches the V Zone, the active driven safety device 2 shall make the 
calendering ro ll stop. The device is the tripping bar described in 5.1.1.4, with the position shown in Chart 
6.  shall be replaced by r . 
—— After the operator returns to I Zone from II Zone, the rotation speed of the calendering rollers 
can inc rease from V r to V p by manual control. After the operator returns to I Zone from II Zone, he/she 
can start the verifying s witch set in I Zone to send out the signals. The switch  cannot be operated in II 
Zone. To send a verifying signal in II Zone, observation tools can be used if necessary.  
See 7.1.2 c).  
5.l.l.6  Emergency stop device   
The emergency stop device shall conform to the requirements in GB 16754 2008, in which the 
Type 1 parking is applicable to electric braking; Type 0 parking is applicable to simple mechanical 
braking (irrelevant to electric power), an emergency stop manipulator shall be equipped on the control 
panel of the calendering machine;  other emergency stop manipulator s shall be equipped near the 
working area and on each side of the working area.  
The action of any emergency stop manipulator shall:  GB××××× —200× 
—— Stop the calendering roller according to the requirements in 5.l.1.3. 1; 
—— Allow the cale ndering roller to separate according to the requirements in 5.l.1.3.2;  
—— Allow reverse assistant actions according to the requirements in 5.l.1.3.3;  
—— Trigger the visual and auditory signals and manually reset.  
One of the following emergency stop types sha ll be adopted:  
—— Push -button operated switch;  
Staying operated switch;  
 Foot- or knee -operated switch.  
See requirements in 10.7 of GB/ T 5226.1 -2002.  
5.1.1.7 Positive direction or reverse (if any) start  
The calendering machine shall be equipped with  a pattern selector according to the requirements in 
4.11.10 and 5.5.2 in GB/T 15706.2 2007:  
Parking;  
Low-speed positive direction movement;  
Positive direction movement in manufacturing speed;  
Reverse movement (if any).  
Start is allowed only after sending out the audio alarm signals conforming to the requirements in GB 
1251.1 and GB 18209. 1, the signals shall last until the rollers rotate to 5s.  
To start, some protective devices shall be removed. The safety of the operator shall be guaranteed 
throu gh controlling methods, according to the requirements in 4.11.9 of GB/T 15706.2 2007.  
See 7.1.2 f).  
5.1. l.8 Reverse operation (if any)  
Selecting the reverse movements on the pattern selector shall trigger a flashing light signal to the 
new suction zone created by the reverse movement. The signal will last as long as the selector sw itch is 
kept in that pattern.  
According to the requirements in 3.26.3 of GB/T 15706.1 2007, the reverse movement shall be 
operated by keeping the stop -move controlling device running; the speed shall be no more than 5 m/ min.  
It is important that, when th e calender implements reverse movement, the operator can clearly 
observe the new dangerous area created. According to the specification of the calender, some visible 
auxiliary measures can be taken such as the use of mirrors and monitors.  
Once manual cont rol is lost, the reverse movement must stop immediately under the function of the 
braking device.  
5.1.l.9 Cleaning of the calender rollers  
Cleaning of the calender rollers:  
a) In the process of cleaning, the risk of entangling and grinding must be avoid ed. The design ated 
calender shall be cleaned by using the following methods:  
When the rollers are in a static state, or:  GB××××× —200× 
on the discharging side of the roller, or:  
on the charging side of the roller, except for the outer danger area determined in 3.1 3. 
If any of these methods can not be adopted, the calender shall be equipped with cleaning devices 
(such as tools, operating devices, manipulators) to make sure that the operator can safely clean the 
roller in the danger zone determined in 3.13.  
b) When t he methods in a) can not be adopted because of technical reasons and interference in the 
danger zone, one of the following devices shall be provided to avoid approaching the suction area 
determined in 3.12:  
1) set a specific protective device for cleaning in a place a certain distance away (according to the 
prescriptions in GB 12265.1 1997 and 5.1.1.1 of the standard) from the suction zone (see Chart 9). 
The protective device can replace the protective or safety device determined in 5.1.1.2.  
 
 
 
1 danger  zone;  2  cleaning -up zone; 3  specific protective device for cleaning.  
Chart 9 Sketch map of specific protective device for roller danger zone  
2) Only when a single  layer has been sent into the roll gap and the first contact point between 
the sheet and  roller surface is outside the dangerous zone in 3.13, the tripping bar in 5.1.1.4.1 
shall be positioned according to Chart 10;  
   
 
 
 
 
 
 
 GB××××× —200× 
 The unit is mm  
 
Chart 10 Position according to the tripping bar introduced in 2) of 5.1.1.9.b  
c) If it is easy to e nter into the suction zone from the clean -up working station, safety protective 
devices shall be set according to the requirements in 5.1.1.l or 5.1.1.2;  
d) The manufacturer shall provide clean -up safety measures;  
Note: according to the permanent safety methods in GB/T 17888.1  GB/T 17888.4;  
e) Use the ergonomic principles as much as possible (see EN 614 -l1995);  
f) The operatin g instruction s shall provide comprehensive information about safe clean -up steps, see 
7.1.2f).  
5.1.1.10 Setting, process transferring, fault clearance and maintenance  
The requirements in 5.2.4 of GB/T 15706.2 2007 shall be conformed to.  
The operati ng instruction s shall provide the safe work instruction s, see 7.1.2f).  
5.1.2 The risks of auxiliary roll  
The following one or more methods shall be adopted to  avoid these risks:  
—— Determine the distance according to the requirements in Table 2 and 4.2.2 in GB 
12265.1 1997;  
—— The position of the auxiliary roll shall conform to the distance required in GB 12265.3 1997;  
—— The fixed protective device shall be deter mined according to the requirements in 3.2 of GB/T 
8196 2003 or 5.1.1.1 in the standard;  
—— according to the interlock protective device required in 3.5 of GB/T 8196 -2003 or the 
interlocking devices associated with guards required in 3.6 of GB/T 8196 2003, the selection of the 
interlocking device type shall conform to the requirements in GB/ T 18831 2002;  
—— tripping device required in 5.1.1.2 b) of the standard.  
Because of the opening of the inter lock protection or intentional/ unintentional start of the trip ping 
device, the calendering roller will stop subsequently to ensure that it conforms with the distance required GB××××× —200× 
in GB 12265.3 1997. The interlock protective device or the tripping device shall be positioned 
according to the requirements in GB/T 19876 200 5. 
After the separation, the roller shall be fixed safely in the open position to avoid being 
unintentionally closed. Removal can only be done through manual operation.  
 
5.1.3 The risk of auxiliary devices  
5.1.3.1 Cutting device  
Except for cutter trimmer position ing to ensure its safety, the blade shall be protected in the 
following ways to prevent unintentional contact:  
a) On the rest position , the trimmer shall withdraw into the protective cover;  
b) On the working position, the components that are not us ed to cut shall be protected in the 
following ways:  
—— according to the requirements in 3.2.2 of GB/T 8196 2003, set the protective device 
according to the safe distance required by Table 2 in GB 12265.1 1997;   
—— according to the requirements in 3.2.1 of GB /T 8196 2003, set the enclosed 
protective device.   
See 7.1.2 h).  
5.1.3.2 Flap  
The interval between the flap and the roller shall be no more than 4mm.  
5.1.3.3 Alternate feeding conveying device  
One or more of the following protective methods shall be provid ed: 
—— Fixed protective device that meets the requirement in 3.2 of GB/T 8196 2003;  
—— Tripping device meets the requirement in 5.1.1.2 b) of the standard.  
—— The minimal interval between the conveying device and fixed components shall meet the 
requirements i n GB 12265.3 1997;  
—— The driving force limit of alternate motion of the conveying device is limited at 150N.  
 GB××××× —200× 
 
1 fixed protective cover; 2  tripping device; 3  application; 4  limitation of the driving force; 5 fixed components.  
Chart 11 Example of  the protective methods of alternate feeding conveying device  
5.2 Safety Requirements and Measures of Electrical Risk  
5.2.1 Electric shock or fire directly or indirectly caused by the active components  
 
The electrical device shall meet the requirements in GB 5226.1 2002 and the following 
requirements.  
5.2.l.l Power supply cut -off (isolation) device  
Power supply cut -off device shall meet the requirements in 5.3.2 of GB 5226.1 2002.  
5.2.l.2 Direct contact protection  
The lowest protective level shall be ado pted:  
active components in the protective cover: IP2X (according to the requirements in GB 
4208 2008);  
the upper surface of the protective cover that is easy to touch: IP4X (according to the 
requirements in GB 4208 2008).  
When the protective cover is open, the lowest protective level shall be adopted:  
A ccording to the requirements in 6.2.2a) of GB 5226.1 2002: the active components inside are 
IP1X (according to the requirements). When reset or adjusted, the active components may be in 
contact with th e device, the protection level shall be IP2X (according to the requirements in GB 
4208 2008);  
According to the requirements in 6.2.2b of GB 5226.1 2002: IP2X (according to the 
requirements in GB 4208 2008);  
 A ccording to the requirements in 6.2.2c of G B 5226.1 2002: IP2X (according to the 
requirements in GB 4208 2008).  
See requirements in 6.2 of GB/ T 5226.1 -2002.  
5.2.l.3 Indirect contact protection  GB××××× —200× 
The following measures shall be taken for indirect contact protection:  
protect by automatically cutti ng the power supply; or  
protective insulation or equivalent insulation; or  
electric separation protection.  
See requirements in 6.3 of GB/ T 5226.1 -2002.  
5.2.1.4 Determination of the lead  
The lead shall be determined according to the requirements in 1 4.2 of GB 5226.1 2002.  
5.2.l.5 Test and identification  
Testing and identifying method shall be selected according to the requirements in 19 of GB 
5226.1 2002.  
5.2.2 Electric shock or fire caused by static electricity discharge  
See requirements in 5.5.4 o f GB/ T 15706.2 --2007.  
Proper measures shall be adopted;  for example, form or use the connected and grounded c onductor 
surface or use an ionis ation device, see 7.l.2i . 
5.3 Safety Requirements and Measures of Heat Risk  
5.3.1 Burn caused by touching the he at components of calender or hot materials  
In order to avoid getting burnt by unintentionally touching the heat components of the calender, 
fixed protective devices, he at shields or heat insulation d escribed in 3.2 or GB/T 8196 2003 shall be 
installed at the components that are easy to touch (the highest surface temperature may exceed t he limit 
described in GB/T 18153 2000); at the areas that are easy to touch, active protective devices or tripping 
devices shall be used to provide protection. For these hea t components, warning signals shall be placed 
on the protective devices or tripping devices.  
If hot materials are easy to touch outside the heat components ’ protective device, warning signals 
shall be placed near the contact point. A detailed introduction shall be provided in the operati ng 
instruction s, see 7.1.2j ) and 7.2.  
5.3.2 Scalding caused by ejection of hot fluid  
To prevent the operator from being scalded when the hose  pipe breaks, an enclosed protective 
cover or shield shall be installed to protect personnel working at or passing by the area.  
For th e end of the high -pressure -liquid conveying hose, an auxiliary confining device shall be 
equipped according to the requirements in 4.10 of GB/T 15706.2 2007.  
5.3.3 Burn caused by infrared radiation  
These risks can be eliminated by installing  protective cover ing or isolation.  
5.4 Safety Requirements and Measures of Noise Risk  
5.4.1 Reduce the noise through design  
The machine shall be designed according to the requirements in 4.2.2 in GB/T 15706.2 2007. 
Mean while, during the design stage, use relevant materials and technical measures to control the noise.  
The major noise sources are:  
—— the driving part of the electromotor;  
—— dynamic force transferring system;  
—— air-controlling system;  
—— pressure -reducing val ve/discharging system;  
—— air-exhaust system;  GB××××× —200× 
——  hydraulic device;  
—— controlling valve;  
—— pipeline.  
For example, the following measures can be taken:  
—— silencer;  
—— low-noise machine elem ents (for example: pump, blower, electric motor and gearwheel);  
—— vibra tion reduction;  
—— shock resistant installation;  
—— sound isolator. See 7.1.1e), 7.1.2 k),7.l.2 l ) and 7.1.2 m).  
5.4.2 Determination of the noise value  
In case there are no noise test methods, one of the following methods shall be used to determine the 
noise transmission value:  
Determine the sound pressure level of the working station/area according to the requirements in 
GB/T 17248.2 1999 or GB/T 17248.31999 or GB/T 17248.41998 or GB/T 17248.5 1999.  If 
applicable, Level 2 precision method shall be used (according to the requirements in GB/T 
17248.2 1999 or GB/T 17248.51999).  
If the noise in the working station/area cannot be determined, according to the requirements in 54.2 of 
GB/T 15706.2 2007:   
If the equivalent continuous A -weighted  sound pressur e level  in the working station/area 
exceeds 85 dB A, the sound power level shall be determined according to the requirements in GB/ 
T 6881.2 2002 or GB/ T 6881.3 -2002 or GB/ T3767 or GB/T 3768 or GB/T 16538 or GB/T 
16404 -1996 or GB/T 16404.2 1999. If appl icable, Level 2 precision method shall be used. The 
prefer red method for determining the sound power level shall conform to GB/T 3767.  
See 7.1. 1 d). 
5.5 Safety Requirements and Measures of Risk Caused by Ignoring the Ergonomic Principles  
Because felt -wrap ped roll s or roller s need to be replaced regularly, a mechanical processing device 
shall be equipped to provide assistance, see 7.1.2 n).  
5.6 Safety Requirements and Measures of Risk Caused by Power Failure  
A mechanical contactor of any roller -driven elect romotor may open because of power failure; 
all the rollers may stop according to the requirements in 5.1.1.3.l.  
The calender shall be equipped with a device whi ch does not rely on the normal power supply 
to ensure that the rollers can separate according t o the requirements in 5.1.1.3.2 even in case of 
power failure.  
5.7 Safety Requirements and Measures of Risk Caused by Control System Failure  
5.7.1 Safety relevant to the components of the controlling system  
B Type in GB/T 16855.1 2005 shall not be select ed to be the relevant safety components in the 
controlling system. Components with Safety Level 3, including devices used to trigger, operate and 
start the braking system, shall be selected for the following device controlling system s: 
 interlock protect ive device (all the relevant sub -items of 5.l );  
 interlocking devices associated with guards (all the relevant sub -items of 5.l )  GB××××× —200× 
 interlock of feeding device (5.1.1.1);  
 tripping bar (5.l.l .2 b), 5.l.l.4, 2) in 5.l.l.9 b );  
 other machine -drive n tripping devices, such as the pressure sensor (5.1.1.2 b)  
 non -machine -driven tripping device, (such as light -electricity device).  
5.7.2 Unexpected start  
Prevent unexpected start according to the requirements of 5.4 in GB/T 19670 and GB 5226.1 2002.  
5.8 Safety Requirements and Measures of Slip, Trip and Fall Risk  
Safety measures shall be taken according to the following standards:  
 The requirements in 4.14 of GB/T 15706.2 2007;  
 The requirements in 5.5.6 of GB/T 15706.2 2007;  
  The requirement s of GB/T 17888.1  GB/ T 17888.4.  
6. Certification of Safety Requirements and Measures  
6.1 Conformity verification of safety requirements and measures according to Table 1  
 GB××××× —200× 
Table 1 Verifying methods  
 Verifying methods   
Terms  Safety measures  
  
  Appearance  
examin ation Function  
test Measurement  Calculation  Reference standa rd 
 
Fixed protective device     
   GB 12265.1 1997  
GB/T 8196 2003  
5.1.1.1  Fixed protective lock 
(used to protect the 
interlocking devices 
associated with guards)        
GB/T 8196 2003  
 Feeding device         GB 12265.1 1997  
 Interlock protection with 
protective lock        GB/T 8196 2003  
GB/T 18831 2002  
      GB/T 8196 2003  
 Interlock protection          GB/T 19876 2005  
     GB/T 18831 2002  
5.1.1.2        
 Machine -driven tripping 
device      See 5.1.1.4 in the Table  
 —— Tripping bar          GB/T 19876 2005  
 —— Other devices, such 
as pressure sensor      GB/T 17454.1 1998  
 Non-machine -driven 
tripping device, such as 
light-electricity device          GB/T 19876 2005  
GB/T 19436.1 2004  
 Stop of the c alender ing 
roller         
5.1.1.3.l  Interlocking devices 
associated with guards         GB/T 8196 2003  
GB/T 18831 2002  
5.1.1.3.2  Roller separation          
5.1.1.3.3  Reverse salvage a ction         
Tripping bar          GB 12265.1 1997  
GB/T 18831 2002  
5.1.1.4  
Auxiliary fixed 
protection    
   GB 12265.1 1997  
GB/T 8196 2003  
 Safety device 1      See 5.1.1.2 in the Table  
5.1.1.5  Safety device 2      See 5.1.1.4 in the Table  
 The combination of the 
two safety devices           
5.1.1.6  Emergency stop device         GB 16754 2008  
GB 5226.1 2002  
 Pattern selector        GB/T 15706.2 2007  
5.1.1.7  Sound alarm signal   
     GB 1251.1  
GB/T 18209.1  
 Other control methods 
in the situations of 
removing or replacing 
the safety devices        
GB/T 15706.2 2007  
Flashing  light signals         
5.1.1.8  Keep moving stop -move 
controlling device         GB××××× —200× 
Table 1 (Continued)  
 Verifying methods   
Terms  Safety measures  
  
  Appearance  
examin ation Function  
test Measurement  Calculation  Reference standard  
5.1.1.9  Clean -up        GB 12265.1 1997  
EN 614 -1 See 5.1.1.1, 
5.1.1.2  and 5.1.1.4 in the 
Table 
5.1.1.10  Setting, process 
transferring, fault 
clearan ce and 
maintenance        
GB/T 15706.2 2007  
 Distance       GB 12265.1 1997  
 Location       GB 12265.3 1997  
 
Fixed protection     
   GB/T 8196 2003 See 
5.1.1.1 in the Table  
5.1.2  Interlock protection          GB 12265.3 1997  
GB/T 8196 2003  
GB/T 19876 2005  
GB/T 18831 2002  
 Interlocking devices 
associated with guards        GB/T 8196 2003  
GB/T 18831 2002  
      GB/T 8196 2003  
 Tripping device          GB/T 19876 2005  
      See 5.1.1.2 in the Table  
 Cutter trimmer on the 
rest posit ion       
5.1.3.l  Fixed distance 
protection     
   GB 12265.1 1997  
GB/T 8196 2003  
 Fixed protective cover       GB/T 8196 2003  
5.1.3.2  Flap       
 Fixed protective device       GB/T 8196 2003  
Tripping device      See 5.1.1.2 in the Ta ble 
5.1.3.3  
Minimal interval       GB 12265.3 1997  
 Driving force limitation        
      GB/T 15706.2 2007  
5.2  Electrical risk        GB 5226.1 2002  
      GB 4208 2008  
Fixed protection, heat 
insulation        GB/T 18153.2 2000  
5.3.1  
Warning l abel      
Sealed protective cover 
or screen        
5.3.2  
Restricting device      GB/T 15706.2 2007  
Shield        
5.3.3  
Distance       GB××××× —200× 
Table 1 (Continued)  
 Verifying methods   
Terms  Safety measures  
  
  Appearance  
examin ation Func tion 
test Measurement  Calculation  Reference standard  
GB/T 15706.2 2007  
GB/T 14574  
GB/T 6881.2 2002  
GB/T 6881.3 2002  
GB/T 3767  
GB/T 3768  
GB/T 16538  
GB/T 16404 1996  
GB/T 16404.2 1999  
GB/T17248.2 1999  
GB/T 17248.3 1999  
GB/T 17248.4 1998  
GB/T17248.5 1999  
ISO 11688 -11998  5.4 Noise     
ISO 11688 -21999  
5.5  Mechanical conveying 
device         
Stop of the roller       See 5.1.1.3.1 in the Table  
5.6  Auxiliary separating 
device independent 
from power supply       
See 5.1.1.3.2 in the Table  
5.7.1  Safety of the components 
related to the control 
system   
    
GB/T 16855.1 2005  
5.7.2  Unexpected start   
    GB/T 19670  
GB 5226.1 2002  
      GB/T 15706. 22007  
5.8  Safe approaching 
method        GB/T 17888.1  
       GB/T 17888.4  
 
6.2 The function test in Table 1 involves verifying the function and effectiveness of the protective device 
and safety device  
—— Operatin g instruction s; 
—— Design materials related to safety;  
—— Chapter 5 of the standard and requirements of other standards provided.  
7. Operation Information  
Operation information shall conform to the prescription in Chapter 6 of GB/T 15706.2 2007.  
7.1 Operatin g Instruction s  
Operatin g instructio ns provided shall conform to the requirements in 6.5 of GB/T 15706.2 2007 
and include the following instruction s relating to the safety of calenders.  
7.1.l Instructions relating  to machine design  GB××××× —200× 
Instructions relating to machine design are as follows:  
 aLow-velocity value v1, step -down velocity value vr, the maximal velocity value vmax;  
 bParking angle á, ámax  and ár (if applicable);  
 c) The user shall not change the detailed safety device position;  
 d) Noise transmitting announcement conforming to the  requirements in 6.5.1c) of GB/T 
15706.2 2007 and prescriptions in GB/T 14574, the announcement shall be duplicated one prescribed 
in GB/ T 14574, see 5.4.2 for the test.  
e) If applicable, the machine shall be equipped with a sound insulation cover, noise protection 
screen or silencer.  
7.1.2 User guidance  
User guidance:  
a) Instruction s relating to the measuring process and method of the parking angle and the frequency 
of the stop test, the guidance explains the measuring methods adopted in readjusting the  stop system to 
ensure that : 
—— The parking angle measured is no more than parking angle  prescribed;  
—— The parking angle measured shall be no more than ámax in case of power failure (see 
5.1.1.3.1);  
If the stop system includes a machine stop and an electr ical stop, the operatin g instruction s shall 
include the test for the whole stop system and the individual test for the machine system.  
b) Saving measurements for reverse assistant actions (see 5.1.1.3.3);  
c) Instruction s about methods and frequency of tri pping bar function test (see 5.1.1.4), or 
instruction s relating to the two safety devices ’ combination (see 5.1.1.5);  
d) The tripping bar shall be used correctly and not used for normal parking.  
e) For definition of dangerous zones and requirements for ala rms in 7.2, it is stressed that the 
operator is not permitted to stand on the dangerous ground or workbench after installation of the calender 
is finished;  
f) Instruction about the start, setting, process transferring, fault clearance and maintenance of th e 
machine  
g) Safety process of roller cleaning (see 5.1.1.9);  
h) Safety process of fixing and changing the cutter trimmer (see 5.1.3.1);  
i) Instruction about grounding requirement because of static danger;  
j) If applicable, directions about personal safety  device s shall be provided, such as protective gloves 
to prevent hands from burning by touching the heat components of the calender or other hot materials.  
k) If applicable, adopt sound insulation cover, sound insulation room, or operating and maintenance 
pattern s to decrease noise;  
l) To decrease the noise, take some measures in installation and assembly, such as  an anti -vibration 
device;  
m) If applicable, personal hearing protection shall be provided;  
n) Safety process in changing the rollers;  
o) A pplica tion instruction s of the roller separating device irrelevant to the normal power supply 
mentioned in 5.6.  GB××××× —200× 
7.2 Label s  
Labels shall be made according to the requirements in 6.4 of GB/T 15706.2 2007.  
The following labels shall be included for each calender:  
—— Name of the manufacturer and supplier;  
—— Label of mandatory requirement;  
—— Design sequence number or type number;  
—— Serial number or machine code;  
—— Warning label of hot surface.  
Also, tripping bars shall be installed on the calender according to 5.1.1. 4; 
—— The definition of a dangerous zone shall be clear and marked with a consistent line (arc) on the 
frame on the two sides of the roller, the line width shall be no less than 10mm and broaden to the horizon 
of the surface of the roller;  
—— On the machine near the tripping bar, a warning label reading “When the tripping bar is not started, 
crossing the boundary is dangerous.” shall be placed.GB××××× —200× 
  
Annex A(Informative annex)Examples of different types of calenders  
From Chart A.1 to Chart A.5, the rollers can be  different.  
 
 
                                                                             Chart A.5 Five -roll calender        Chart A.2 Three -roll calender       Chart A.1 Two -roll calender     
          
           Chart A.3 2 2-roll calender  
          
           Chart A.4 Four -roll calender  GB××××× —200× 
 
Annex B  (Informative annex)  Examples of calendering technologies  
 
Chart B.2 Two -layer tabletting  
 
 
Chart B.4 Single -surface rubberi sing           
   Chart B.1 Tabletting  
          
Chart B.3 Single -surface double -layer GB××××× —200× 
 
Chart B.5 Double -surface rubberi singGB××××× —200× 
 
Annex C(Informative annex) The risk caused by processing materials  
C.1 Introduction of risk  
Touching and/or soaking in poisonous gas, vapour, smoke or dirt in processing the materials.  
C.2 Protection of ma terial risk  
In designing the machine, on the basis of not influencing the origin al mechanical structure, an 
air-exhaust device shall be installed and fixed; the poisonous gas can be release d in time.  
See requirements in 5.4 of GB/ T 15706.2 -2007.  
C.3 User  guidance  
If the release of poisonous substances is likely while processing certain materials, guidance books 
about installing and locating the exhaust system shall be provided to the users to instruct them. The 
installation of the exhaust system shall be convenient to the installation and the disassembly of the 
calender rolls.  
When eyes and/or skin are likely to touch poisonous materials or substances, the users shall provide 
personal protective devices to the operators. GB××××× —200× 
 
Annex D  (Informative annex)  Calc ulation of the Suction Area Size (to roller s with the same 
diameter)  
OO   Axis of the roller;  
C  Theoretical roller contact point;    
OA   Radius of the roller OAR  
AB   The entry of the suction zone A BS12mm   
H   Projection of A on the O O’ axis;  
AH   Depth of the suction zone AHL  
 
L 
  
For example: if R=300 mm diameter of roller  D 600 mm   
L= 
  =60mm  
 
 
 
 
 
where  
    and  and 
where  
can be simplified to  Chart D.1 Calculation of the dimension  GB××××× —200× 
 
 
Annex E  (Informative annex)  Fixed protective device of the suction zone  
The unit is mm  
 
Chart E.1 Legends of fixed protections of the suction zoneGB××××× —200× 
 
Annex F (Informative a nnex)  Example of Special Protection by Restricting Movement to Prevent 
Entering into the Suction Area  
F.1 Introduction  
The protective device that extends to the length of the whole roller, used to preve nt the operator’s 
fingertip s from entering into the suction zone. It is required that in the installation, the operator is able to 
see the roll gap clearly. This kind of protective device is particularly applicable to the processing 
protection of fibre han gings.  
F.2 Structure and performance  
F.2.1 The protective device is composed of bars or rings with small intervals, with numerous holes along 
it. The intervals and holes are determined according to Table 3 or Table 4 in GB 12265.1 -1997.  The 
design of the p rotective shape must ensure that the protection and the angle and interval of the roller are 
no more than the size mentioned in Chart 1.  
F.2.2 If the hands or materials are entangled between the protection and roller, the protection will rotate 
around the  horizontal axis. The rotation will touch the position sensor to stop the calender roller. The 
protection will be turned back by a block and keep an interval of 6mm with the roller. When evacuating 
the hands or materials, the protection will return to the static position to avoid restart.  
 
The unit is mm  
 
1 Protection; 2  pivot; 3  position sensor; 4  block; 5  Intervals and holes on the protective device.  
 Chart F.1 Examples of special protectionsGB××××× —200× 
 
 
Annex G  
(Informative annex)  
Table G.1 Check Lis t for Relevant Standards Quoted by the Standard  
National standards quoted 
in the standard  Corresponding standards quoted in the International Standard EN12301 2000  
GB 1251.1.1 2008  ISO 7731 2003 EN 457 1992  
GB/T 3767.2 1996  ISO 3744 1994 EN ISO 3744 1995  
GB/T 3768.2 1996  ISO 3746 1995 EN ISO 3746 1995  
GB 4208.1 2008  IEC 60529 2001 EN 60529 1991  
GB 5226.1.1 2002  IEC 60204 -12000 EN 60204 -11997  
GB/T 6881.2.2 2002  ISO 3743 -11994 EN ISO 3743 -11995  
GB/T 6881.3.2 2002  ISO 3743 -21994 EN I SO 3743 -21996  
GB/T 8196.2 2003  ISO 14120 2002 EN 953 1992  
GB 12265.1 1997  — EN 294 1992  
GB 12265.3.1 1997  — EN 349 1993  
GB/T 14574.2 2000  ISO 4871 1996 EN ISO 4871 1996  
GB/T 15706.1.2 2007  ISO 12100 -12003  
GB/T 15706.2 2007  ISO 12100 -22003 EN 292 -21991/A1 1995  
GB/T 16404.2 1996  ISO 9614 -11993 EN ISO 9614 -11995  
GB/T 16404.2.2 1999  ISO 9614 -21996 EN ISO 9614 -21996  
GB/T 16538.2 2008  ISO 3747 2000 ISO /DIS 3747 2000  
GB 16754.1 2008  ISO 13850 2006 EN 418 1992  
GB/T 16855.1.2 2005  ISO 13848 -11999 EN 954 -11994  
GB/T17248.2 1999  ISO 11201 1995 EN ISO 11201 1995  
GB/T 17248.3.2 1999  ISO 11202 1995 EN ISO 11202 1995  GB××××× —200× 
 
 
 
Table G.1 (Continued)  
National standards quoted by 
the standard  Corresponding standards quoted by the In ternational Standard EN12301 
2000  
GB/T 17248.4.2 1998  ISO 11203 1995   EN ISO 11203 1995 
GB/T17248.5 1999  ISO 11204 1995  EN ISO 11204 1995 
GB/T 17454.1.2 1998  — EN 1760 -11994 
GB/T 17888.1.2 2008  ISODIS 14122 -12001  Pr EN 12437 -11996 
GB/T 17888 .2.22008  ISODIS 14122 -22001  Pr EN 12437 -21996 
GB/T 17888.3.2 2008  ISO / DIS 14122 -32001  Pr EN 12437 -31996 
GB/T 17888.4.2 2008  ISO / DIS 14122 -42004  Pr EN 12437 -41996 
GB/T 18153.2 2000   EN 563 1994 
GB/T 18209.1.2 2000  IEC 61310 -11995  IEC 61310 -11995 
GB/T 18831.2 2002  ISO 14119 1998  EN 1088 1995 
GB/T 19436.1.2 2004  ICE 61496 -11997  EN 61496 -11998 
GB/T 19670.2 2005  ISO 14118 2000  EN 1037 1995 
GB/T 19876.2 2005  ISO 13855 2002   EN 999 1998