DRAFT UGANDA STANDARD  
  DUS 1633  
First Edition  
2017 -04-dd 
 
 
 Reference number  
DUS 1633: 2017  
© UNBS 2017   
  
Cold rolled low carbon steel flat products for cold forming –— 
Technical delivery conditions  
 DUS 1633: 2017  
ii © UNBS 2017  – All rights reserve d 
 Compliance with this standard does not, of itself confer immunity from legal obligations  
A Uganda Standard does not purport to include all necessary provisions of a contract. Users are 
responsible for its correct application  
© UNBS 2017   
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilised in any 
form or by any means, electronic or mechanical, including photoc opying and microfilm, without prior written 
permission from UNBS.  
Requests for permission to reproduce this document should be addressed to  
The Executive Director  
Uganda National Bureau of Standards  
P.O. Box 6329  
Kampala  
Uganda  
Tel: +256 41 4 333 2 50/1/2/3  
Fax: +256 41 4 286 123  
E-mail: info@unbs.go.ug  
Web: www.unbs.go.ug  DUS 1633: 2017  
© UNBS 2017  – All rights reserved  iii 
 Contents  Page 
Foreword  ................................ ................................ ................................ ................................ ............................  iv 
1 Scope  ................................ ................................ ................................ ................................ ......................  5 
2 Normative references  ................................ ................................ ................................ ............................  5 
3 Terms and definitions  ................................ ................................ ................................ ...........................  6 
4 Designation  ................................ ................................ ................................ ................................ ............  6 
5 Requirements  ................................ ................................ ................................ ................................ .........  6 
5.1 Steelmaking  and manufacturing processes  ................................ ................................ .......................  6 
5.2 Deoxidation  ................................ ................................ ................................ ................................ ............  7 
5.3 Chemical composition  ................................ ................................ ................................ ..........................  7 
5.4 Delivery conditions  ................................ ................................ ................................ .............................  10 
5.5 Mechanical properties ................................ ................................ ................................ .........................  10 
5.6 Surface characteristics  ................................ ................................ ................................ .......................  10 
5.6.1 General  ................................ ................................ ................................ ................................ .................  10 
5.6.2  Surface quality  ................................ ................................ ................................ ................................ ..... 10 
5.6.3  Surface finish  ................................ ................................ ................................ ................................ ....... 11 
5.7 Stretcher strain marks  ................................ ................................ ................................ ........................  11 
5.7.1  General  ................................ ................................ ................................ ................................ .................  11 
5.7.2  Skin -passed products  ................................ ................................ ................................ .........................  11 
5.7.3  Non-skin-passed products  ................................ ................................ ................................ .................  11 
5.8 Suitability for surface coating  ................................ ................................ ................................ ............  11 
5.9 Weldability  ................................ ................................ ................................ ................................ ............  11 
5.10  Tolerances on dimensions and shape  ................................ ................................ ..............................  11 
5.10.1  Tolerances on out of squareness  ................................ ................................ ................................ ...... 11 
5.10.2  Tolerances on edge camber  ................................ ................................ ................................ ...............  12 
5.10.3  Superimposition of dimensions  ................................ ................................ ................................ .........  12 
6 Tests  ................................ ................................ ................................ ................................ .....................  12 
6.1 General  ................................ ................................ ................................ ................................ .................  12 
6.2 Inspection units  ................................ ................................ ................................ ................................ ... 13 
6.3 Number of tests  ................................ ................................ ................................ ................................ ... 13 
6.4 Sampling  ................................ ................................ ................................ ................................ ..............  13 
6.5 Test methods  ................................ ................................ ................................ ................................ ....... 13 
6.6 Re-tests  ................................ ................................ ................................ ................................ ................  13 
6.7 Inspection document  ................................ ................................ ................................ ..........................  13 
6.7.1  General  ................................ ................................ ................................ ................................ .................  13 
6.7.2  Inspection documents based on non - specific inspection  ................................ ............................  14 
6.7.3  Inspection documents based on specific inspection  ................................ ................................ ...... 14 
6.7.4  Validation and transmission of inspection documents  ................................ ................................ ... 14 
6.7.5  Transmission of inspection documents by an intermediary  ................................ ..........................  14 
7 Marking  ................................ ................................ ................................ ................................ .................  15 
8 Pack ing ................................ ................................ ................................ ................................ .................  15 
9 Information to be provided by the purchaser at the time of order  ................................ .................  15 
Bibliography  ................................ ................................ ................................ ................................ ......................  17 
 DUS 1633: 2017  
iv © UNBS 2017  – All rights reserve d 
 Foreword  
Uganda National Bureau of Standards (UNBS) is a parastatal under the Ministry of Trade , Industry and 
Cooperatives established under Cap 327 , of the Laws of Uganda , as amended .  UNBS is mandated to co -
ordinate the elaboration of standards and is  
(a) a member of International Organisation for Standardisation (ISO) and  
(b) a contact point for the WHO/FAO Codex Alimentarius Commission on Food Standards, and  
(c) the National Enquiry Point on TBT  Agreement  of the World Trade Organisation (WTO).  
The work of preparin g Uganda Standards is carried out through Technical Committees. A Technical 
Committee is established to deliberate on standards in a given field or area and consists of key stakeholders 
including government, academia, consumer groups, private sector and ot her interested parties.  
Draft Uganda Standards adopted by the Technical Committee are widely circulated to stakeholders and the 
general public for comments. The committee reviews the comments before recommending the draft standards 
for approval and declar ation as Uganda Standards by the National Standards Council.  
The committee responsible for this document is Technical Committee UNBS/TC 4, Mechanical Engineering 
and Metallurgy . 
 DUS 1633: 2017  
© UNBS 2017  – All rights reserved  5 
 Cold rolled low carbon steel flat products for cold forming — 
Technical deli very conditions  
1 Scope   
This Final Draft Uganda Standard applies to cold rolled uncoated low carbon steel flat products in rolled 
widths equal to or over 600 mm for cold forming, with a minimum thickness of 0.35 mm.  
This standard does not apply to cold r olled narrow strip (rolling width < 600 mm) nor to flat cold rolled products 
in particular the following:  
 cold rolled non -grain oriented magnetic steel sheet and strip;  
 semi -processed steel strip for the construction of magnetic circuits;  
 blackplate in coi ls; 
 cold rolled flat products in high yield strength steels for cold forming;  
 cold rolled uncoated non -alloy mild steel narrow strip for cold forming; and  
 cold rolled low carbon steel flat products for vitreous enamelling . 
2 Normative references   
The follo wing referenced documents referred to in the text in such a way that some or all of their content 
constitutes requirements of this document. For dated references, only the edition cited applies. For undated 
references, the latest edition of the referenced document (including any amendments) applies.  
WDUS 1790 , Measurement of roughness average Ra and peak count RPc on metallic flat products.  
ISO 10474 , Steel and steel products — Inspection documents  
ISO 404 , Steel and steel products — General technical deliv ery requirements  
ISO/TS 4949 , Steel names based on letter symbols  
US 266, Steel  — Tensile testing (Metallic materials — Tensile testing at ambient temperatures)  
ISO 377 , Steel and steel products — Location and preparation of samples and test pieces for me chanical 
testing  
US ISO 6929 , Steel products — Vocabulary  
ISO 10113 , Metallic materials — Sheet and strip — Determination of plastic strain ratio  
ISO 10275,  Metallic materials — Sheet and strip — Determination of tensile strain hardening exponent  
ISO 142 84, Steel and iron — Sampling and preparation of samples for the determination of chemical 
composition  DUS 1633: 2017  
6 © UNBS 2017  – All rights reserved  
 3 Terms and definitions   
For the purposes of this document, the terms and definitions given in US ISO 6929  apply.  
ISO and IEC maintain terminological da tabases for use in standardization at the following addresses:  
— ISO Online browsing platform: available at http://www.iso.org/obp  
4 Designation  
The steel names and the steel numbers shall comply with the requirements of ISO/TS 4949 . 
The designation consi sts of the word "sheet", "coil", "slit coil" or "cut length", followed in order by:  
a) reference to this Uganda standard, steel name or steel number (see Table 2);  
b) symbol concerning the surface quality (A for surface quality A or B for surface quality B); and  
c) if applicable, the symbol relating to the surface finish (see Table 1).  
Table 1 — Surface  finish and roughness values  
Surface finish  Symbol  Roughness  
(cut off: 0.8 mm)  
Bright  b Ra ≤ 0.4 μm  
Semi -bright  g Ra ≤ 0.9 μm  
Normal  m 0.6 μm < Ra ≤ 1.9 μm  
Rough  r Ra > 1.6 μm  
 
EXAMPLE 1  Designation of sheet made of steel grade DC01 (1.0330), surface quality A, surface finish normal (m):  
 Sheet DUS 1633 – DC01 –A–m; or 
 Sheet DUS 1633  – 1.0330 –A–m 
EXAMPLE 2  Designation  of coil made of steel grade DC06 (1.0873), surf ace quality B, surface finish semi -bright (g):  
 Coil DUS 1633  – DC06 –B–g; or 
 Coil DUS 1633  – 1.0873 –B–g 
5 Requirements  
5.1 Steelmaking  and manufacturing processes  
Unless otherwise agreed at the time of enquiry and order the steelmaking and manufacturing pro cesses are 
left to the discretion of the manufacturer. The purchaser shall be informed of these processes if he or she 
specifies.  DUS 1633 : 2017  
© UNBS 2017  – All rights reserved  7 
 5.2 Deoxidation  
For grade DC01, the method of deoxidation shall be at the manufacturer's discretion. Grades DC03, DC04, 
DC05, DC06 and DC07 shall be aluminium fully killed.  
5.3 Chemical composition  
The chemical composition based on ladle analysis shall be as given in Table 2.  
 DUS 1633: 2017  
© UNBS 2017  – All rights reserved  8 
 Table 2 — Characteristics  of the skin -passed products  
Steel  
name  
 Steel  
number  Classification  Surface  
quality  Absence of  
stretcher  Re 
a Rm A80 
b r90 
c d n90 
c Ladle analysis  
chemical composition  
MPa MPa min
. 
% min min C, 
max.  
% P, 
max.  
% S, 
max.  
% Mn, 
max.  
% Ti, 
max.  
% 
DC01e 1.0330  Non-alloy quality 
steelf A  -/280gi 270/410  28 - - 0.12 0.045  0.045  0.6 - 
B 3 month  
DC03  1.0347  Non-alloy quality 
steelf A 6 month  -/240g 270/370  34 1.3 - 0.10 0.035  0.035  0.45 - 
B 6 month  
DC04  1.0338  Non-alloy quality 
steelf A 6 month  -/210g 270/350  38 1.6 0.180  0.08 0.030  0.030  0.40 - 
B 6 month  
DC05  1.0312  Non-alloy quality 
steelf A 6 month  -/180g 270/330  40 1.9 0.200  0.06 0.025  0.025  0.35 - 
B 6 month  
DC06  1.0873  Alloy quality 
steel  A No limit  -/170h 270/330  41 2.1 0.22 0.02 0.020  0.02 0.25 0.3j 
B No limit  
DC07  1.0898  Alloy quality 
steel  A No limit  -/150h 250/310  44 2.5 0.23 0.01 0.020  0.020  0.20 0.2j 
B No limit  
NOTE  1 MPa = 1 N/mm2. 
a The values of yield strength are 0.2 % proof strength for products which do not present a defin ite yield point, and the lower yield strength ReL for the others. When the 
thickness is less than or equal to 0.7 mm and greater than 0.5 mm, the value for yield strength is increased by 20 MPa. For t hicknesses less than or equal to 0.5 mm, the value 
is increased by 40 MPa.  
b When the thickness is less than or equal to 0.7 mm and greater than 0.5 mm, the minimum value for elongation is reduced by 2 units. For a thickness less than or equal to 
0.5 mm, the minimum value is reduced by 4 units.  
c The values of r90 and n90 only apply to products with a thickness equal to or greater than 0.5 mm.  DUS 1633 : 2017  
© UNBS 2017  – All rights reserved  9 
 d When the thickness is over 2 mm, the value for r90 is reduced by 0.2.  
e It is recommended that products in grade DC01 should be formed within 6 weeks from the time of th eir availability.  
f Unless otherwise agreed at the time of enquiry and order, grades DC01, DC03, DC04 and DC05 may be supplied as alloy steels (f or example with boron or titanium).  
g For design purposes, the lower limit of Re for grades DC01, DC03, DC04 an d DC05 may be assumed to be 140 MPa.  
h For design purposes the lower limit of Re for grade DC06 may be assumed to be 120 MPa and 100 MPa for grade DC07.  
i The upper limit of Re of 280 MPa for grade DC01 is valid only for eight days from the time of the ava ilability of the product . 
j Titanium may be replaced by niobium. Carbon and nitrogen shall be completely bound.  DUS 1633: 2017  
© UNBS 2017  – All rights reserved  10 
 5.4 Delivery conditions  
5.4.1  The products shall be supplied in the skin -passed condition.  
5.4.2  The products shall be delivered oiled. Both s ides shall be corrosion protected by a layer of neutral 
non-drying oil, free of foreign bodies and uniformly spread. The layer of oils shall be capable of being removed 
by alkaline solutions or normal solvents.  
If the purchaser does not require the surface s to be oiled, this shall be clearly indicated at the time of enquiry 
and order.  
If the conditions of transportation or storage are such that special protection against corrosion is required, the 
purchaser shall inform the manufacturer at the time of enqui ry and order.  
If the order is for non -oiled products, the manufacturer is not responsible for the risk of corrosion. The 
purchaser is also advised that there is a greater risk of the appearance of light scratches during handling, 
transportation, and applic ation.  
5.5 Mechanical properties  
The mechanical properties given in Table 2 apply only to skin -passed products (see 5.7.2). The mechanical 
properties are valid for the period specified in Table 2 from the date on which the products are made available.  
The validity of mechanical properties is not guaranteed for DC01 and is guaranteed for six months for DC03 to 
DC07, starting from the availability date at the manufacturer's works.  
5.6 Surface characteristics  
5.6.1  General  
The surface characteristics consist o f the surface quality and the surface finish. The surface quality and finish 
shall be specified by the purchaser at the time of enquiry and order.  
5.6.2  Surface quality  
The products are supplied with either of the surface qualities A or B.  
a) for products wit h surface quality A, defects such as pores, slight indentations, small marks, minor 
scratches and slight colouring that do not effect formability or the application of surface coatings are 
permitted; and  
b) for products with surface quality B, the better surface shall be free from defects which might affect the 
uniform appearance of a quality paint or an electrolytic coating (see 5.8). The other surface shall 
conform at least to surface quality A.  
Where a single product has b oth surface quality A and B, the specification above should apply.  
On the first wraps of the bore of a coil one shall expect a mark coming from the first wrap’s displacement in 
height.  
In the case of delivery of coil and slit coil, the percentage of defect s may be greater than in the case of 
delivery in sheet or cut lengths. This shall be taken into account by the purchaser and the percentage of 
admissible surface defects shall be agreed at the time of enquiry and order.  DUS 1633 : 2017  
© UNBS 2017  – All rights reserved  11 
 5.6.3  Surface finish  
The surface fin ish may be bright, semi -bright, normal or rough. In the absence of a requirement on the order, 
products shall be supplied with the normal finish.  
By agreement at the time of enquiry and order, other ranges for surface roughness may be specified for 
specifi c and uses.  
5.7 Stretcher strain marks  
5.7.1  General  
All products are generally subjected to a light skin -pass after annealing at the manufacturer's works, to avoid 
the formation of stretcher strain marks during subsequent forming.  
The tendency to form suc h marks may reappear a certain time after the skin -pass. It is therefore in the 
purchaser's interest to form the products as soon as possible.  
Products of grade DC06 and DC07 do not exhibit stretcher strain marks, whether delivered skin -passed or 
non-skin-passed.  
5.7.2  Skin -passed products  
The manufacturer shall ensure the absence of stretcher strain marks:  
a) for six months after products of grades DC03, DC04 and DC05 are made available by the 
manufacturer for  surface qualities A and B;  and 
b) for three months a fter products of grade DC01 are made available by the manufacturer for surface 
quality B.  
5.7.3  Non-skin-passed products  
Stretcher strain marks are permitted in the condition of delivery and on drawn items.  
5.8 Suitability for surface coating  
Products shal l be supplied in accordance with the requirements specified by the purchaser.  When such a 
coating is required, it shall be specified at the time of enquiry and order.  
5.9 Weldability  
Products are suitable for standard welding processes; however, the weldin g process should be specified at 
the time of enquiry and order, essentially in the case of gas welding.  
5.10 Tolerances on dimensions and shape  
5.10.1  Tolerances on out of squareness  
The out -of-squareness ( u) is the orthogonal projection of transverse edge  over a longitudinal edge (see Figure 
1) and shall not exceed 1  % of the actual width of the sheet.  DUS 1633: 2017  
12 © UNBS 2017  – All rights reserved  
 
 
Figure 1 — Out - of - Squareness (U) and edge camber (q)  
5.10.2 Tolerances on edge camber  
Edge camber (q) is the maximum distance  between a longitudinal edge and a straight edge supported on  the 
latter (see Figure 1).  
Edge camber shall be measured on the concave edge. The basis of measurement shall be a distance of  2 m 
taken at any point on the edge. In the case of sheets and cut le ngths with a length less than 2 m, the  basis 
measurement shall be equal to their length.  
The edge camber shall not exceed 5 mm over a length of 2 m. For lengths less than 2 m, the edge  camber 
shall not exceed 0. 25 % of the actual length.  
For slit wide stri p of width less than 600 mm a special edge camber tolerance (CS) of 2 mm maximum on a  2 
m length may be specifi ed. This special edge camber tolerance is not applicable to slit wide strip of high  yield 
strength steels.  
5.10.3  Superimposition of dimensions  
By agreement at the time of ordering, the tolerance on out -of-Squareness  and edge camber may be  replaced 
by a requirement that a perfect rectangle formed by the ordered width and length dimensions can  be 
superimposed onto the sheets delivered . 
6 Tests  
6.1 General  
The purchaser shall specify at the time of enquiry and order his or her requirements for:  DUS 1633 : 2017  
© UNBS 2017  – All rights reserved  13 
 a) type of inspection and testing, specific or non -specific, (see  ISO 404); and  
b) type of inspection document, see ISO 10474  
Specific inspection and testing shall be carried out in accordance with 6.2 to 6.6.  
Specific inspection and testing may not be specified either for the product analysis or for the surface finish.  
6.2 Inspection units  
The inspection unit is 30 t or a fraction of 30 t for products of the same gr ade and nominal thickness. When a 
coil exceeds 30 t it constitutes  a single inspection unit, as do its products.  
6.3 Number of tests  
A tensile test shall be carried out for each inspection unit, and where appropriate, determination of the plastic 
strain ra tio r and the tensile strain hardening exponent n (see Table 2) . 
6.4 Sampling  
The requirements of ISO 377 and ISO 404  are supplemented by the following specific requirements:  
a) sheet and cut lengths: the selection of products to be tested and the position of  the samples in the 
products is left to the discretion of the inspection representative; and  
b) wide strip and slit wide strip: the sample should be taken from the outer end.  
If the width of the product permits, the test pieces for the tensile test shall be t aken perpendicular to the 
direction of rolling.  
6.5 Test methods  
6.5.1  The products shall be tested in the condition of delivery. The tests shall be carried out at ambient 
temperature.  
6.5.2  The tensile test shall be carried out as described in US 266 using type 2 test pieces (initial gauge 
length Lo = 80 mm, width b = 20 mm).  
6.5.3  Surface roughness shall be determined in accordance with DUS 1790  
6.5.4  Determination of the plastic strain ratio r and the tensile strain hardening exponent n shall be carried 
out in accordance with ISO 10113 and ISO 10275.  
6.5.5  To determine the chemical composition ISO 14284 shall apply.  
6.6 Re-tests  
The requirements of ISO 404  shall apply. In the event of disputed test results for coils, samples for retests 
shall be taken at intervals of at least one lap, but also at a maximum distance of 20 m from the appropriate 
end. 
6.7 Inspection document  
6.7.1  General  
By agreement at the time of enquiry and order, an inspection document chosen from those given in 6.7.2 and 
6.7.3 shall be supplied.  DUS 1633: 2017  
14 © UNBS 2017  – All rights reserved  
 6.7.2  Inspection documents based on non  - specific inspection  
6.7.2.1  Declaration of compliance with the order “type 2.1”  
This is a document in which the manufacturer declares that the products supplied are in compliance with the 
requirements  of the order, without inclusion of test results.  
6.7.2.2  Test report “type 2.2”  
This is a document in which the manufacturer declares that the products supplied are in compliance with the 
requirements  of the order and in which he supplies test results based o n non -specific inspection.  
6.7.3  Inspection documents based on specific inspection  
6.7.3.1  Inspection certificate 3.1 “type 3.1”  
This is a document issued by the manufacturer in which he declares that the products supplied are in 
compliance with the  requir ements of the order and in which he supplies test results.  
The test unit and the tests to be carried out are defined by the product specification, the official regulation and  
corresponding rules and/or the order.  
The document is validated by the manufactur er’s authorized inspection representative, independent of the  
manufacturing department.  
It shall be permissible for the manufacturer to transfer on to the inspection certificate 3.1 relevant test results  
obtained by specific inspection on primary or incomi ng products he uses, provided that the manufacturer 
operates  traceability procedures and can provide the corresponding inspection documents required.  
6.7.3.2  Inspection certificate 3.2 “type 3.2”  
This is a document prepared by both the manufacturer’s autho rized inspection representative, independent of 
the manufacturing department and either the purchaser’s authorized inspection representative or the inspector  
designated by the official regulations and in which they declare that the products supplied are in  compliance 
with the requirements of the order and in which test results are supplied.  
It shall be permissible for the manufacturer to transfer on to the inspection certificate 3.2 relevant test results  
obtained by specific inspection on primary or incomin g products he uses, provided that the manufacturer 
operates  traceability procedures and can provide the corresponding inspection documents required.  
6.7.4  Validation and transmission of inspection documents  
The inspection document shall be validated by the  responsible person(s) (name and position).   
The retention and transmission of documents shall be either in electronic data or paper form.  
6.7.5 Transmission of inspection documents by an intermediary  
An intermediary shall only pass on either an original or a copy of the inspection documents provided by the  
manufacturer without any alteration. This documentation shall be accompanied by suitable means of 
identification  of the product, in order to ensure the traceability between the product and the documenta tion. 
Copying of the original document is permitted, provided that:  
a) traceability procedures are operated;  and 
b) the original document is available on request.  DUS 1633 : 2017  
© UNBS 2017  – All rights reserved  15 
 When producing copies it is permissible to replace the information on the original delivered quanti ty by the 
actual  delivered partial quantity.  
7 Marking  
The manufacturer shall provide appropriate marking with the following information:  
a) manufacturer’s name and address;  
b) surface finish;  
c) steel designation;  
d) country of origin;  
e) manufacturer coil number;  
f) coil size (width by thickness, minimum); and  
g) net weight of coil in metric tonnes.  
8 Packing  
The packing requirements shall be agreed at the time of enquiry and order.  
9 Information to be provided by the purchaser at the time of order  
The following information s hall be provided by the purchaser at the time of order to allow the manufacturer to 
supply products conforming to this standard:  
a) full designation as given in Clause 4;  
b) nominal dimensions and tolerances according to the dimensional standard and the ordered quantities;  
c) if the product has to be delivered with mill edges or trimmed edges;  
d) if products are to be supplied non -skin-passed;  
e) limits on the mass and size of the coils and the individual bundles;  
f) intended application of products, including the surface co ating;  
g) if the products are to be welded, an indication of the method to be used;  
h) if the products are to be supplied as suitable for making a specific part;  
i) if inspection documents are required, and their type;  
j) if an external inspection is to be carried out  at the manufacturer's works;  
k) if oiling is not required;  
l) if other protective coatings are required;  
m) detailed description of all other special requirements;  DUS 1633: 2017  
16 © UNBS 2017  – All rights reserved  
 n) any special requirements for packing and marking; and  
o) position of the surface of better surface qua lity. DUS 1633 : 2017  
© UNBS 2017  – All rights reserved  17 
 Bibliography  
[1]. EN 606, Bar coding – Transport and handling labels for steel products . 
[2]. EN 10049, Measurement of roughness average R a and peak count R Pc on metallic flat products   
[3]. EN10130, Cold rolled low carbon steel flat products for cold forming — Technical delivery conditions  
 DUS 1633: 2017  
© UNBS 2017  – All rights reserved  19 
 Certification marking  
Products that conform to Uganda standards may be marked with Uganda National Bureau of Standards 
(UNBS) Certification Mark shown in the figure below.  
The use of the UNBS Certification Mark is governed by the Standards Act, and the Regulations made 
thereunder. This mark can be used only by those licensed under the certification mark scheme operated by 
the Uganda National Bureau of Standards and in conjunction with the relevant Uganda Standard. The 
presence of this mark on a product or in relation to a product is an assurance that the goods comply with the 
requirements of that standard under a system of supervision, control and testing in accordance with the 
certification mark scheme of the Uganda National Bu reau of Standards. UNBS marked products are 
continually checked by UNBS for conformity to that standard.  
Further particulars of the terms and conditions of licensing may be obtained from the Director, Uganda 
National Bureau of Standards.  
 
 DUS 1633: 2017    
 
ICS 77.140.50  
Price based on nn pages  
© UNBS 2017 – All rights reser ved