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New York Codes, Rules and Regulations › Title 16 - DEPARTMENT OF PUBLIC SERVICE › Chapter III - GAS UTILITIES › Subchapter C - Safety › Part 255 - Transmission And Distribution Of Gas › Design of Pipeline Components › Section 255.153 - Components fabricated by welding

Current through Register Vol. 46, No. 28, July 10, 2024
(a) Except for branch connections and
					 assemblies of standard pipe and fittings joined by circumferential welds, the
					 design pressure of each component fabricated by welding, whose strength cannot
					 be determined, must be established in accordance with paragraph UG-101 of
					 section VIII of the ASME Boiler and Pressure Vessel Code, Division I (as
					 described in section
					 10.3 
					 of this Title).
(b) Each
					 prefabricated unit that uses plate and longitudinal seams must be designed,
					 constructed, and tested in accordance with the ASME Boiler and Pressure Vessel
					 Code (as described in section
					 10.3 
					 of this Title), except for:
(1) manufactured
					 butt-welded fittings;
(2) pipe that
					 has been produced and tested under a specification listed in Appendix 14-B of
					 this Title;
(3) partial assemblies
					 such as split rings or collars; or
(4) prefabricated units that the manufacturer
					 certifies have been tested to at least twice the maximum pressure to which they
					 will be subjected under the anticipated operating conditions.
New York Codes, Rules and Regulations › Title 16 - DEPARTMENT OF PUBLIC SERVICE › Chapter III - GAS UTILITIES › Subchapter C - Safety › Part 255 - Transmission And Distribution Of Gas › Design of Pipeline Components › Section 255.155 - Welded branch connections

Current through Register Vol. 46, No. 28, July 10, 2024
(a) Each
					 welded branch connection made to pipe in the form of a single connection, or in
					 a header or manifold as a series of connections, must be designed to ensure
					 that the strength of the pipeline system is not reduced, taking into account
					 the stresses in the remaining pipe wall due to the opening in the pipe or
					 header, the shear stresses produced by the pressure acting on the area of the
					 branch opening, and any external loadings due to thermal movement, weight, and
					 vibration.
(b) The reinforcement
					 required in a welded branch connection shall be determined by the rule that the
					 metal area available for reinforcement shall be equal to or greater than the
					 required area as defined in Rules for Reinforcement of Welded Branch
					 Connections and examples 1 and 2 in Appendix 14- G of this Title.
(c) If a reinforcement member is required,
					 and the branch diameter is such that a localized type of reinforcement member
					 would extend around more than half the circumference of the header, then a
					 complete encirclement type of reinforcement member shall be used, regardless of
					 the design hoop stress, or a smoothly contoured wrought steel tee of proven
					 design may be used.
New York Codes, Rules and Regulations › Title 16 - DEPARTMENT OF PUBLIC SERVICE › Chapter III - GAS UTILITIES › Subchapter C - Safety › Part 255 - Transmission And Distribution Of Gas › Design of Pipeline Components › Section 255.157 - Extruded outlets

Current through Register Vol. 46, No. 28, July 10, 2024
Each extruded outlet must be suitable for anticipated
						service conditions and must be at least equal to the design and strength of the
						pipe and other fittings in the pipeline to which it is
						attached.
New York Codes, Rules and Regulations › Title 16 - DEPARTMENT OF PUBLIC SERVICE › Chapter III - GAS UTILITIES › Subchapter C - Safety › Part 255 - Transmission And Distribution Of Gas › Design of Pipeline Components › Section 255.159 - Flexibility

Current through Register Vol. 46, No. 28, July 10, 2024
Each pipeline must be designed with enough flexibility to
						prevent thermal expansion or contraction from causing excessive stresses in the
						pipe or components, excessive bending or unusual loads at joints, or
						undesirable forces or moments at points of connection to equipment, or at
						anchorage or guide points.
New York Codes, Rules and Regulations › Title 16 - DEPARTMENT OF PUBLIC SERVICE › Chapter III - GAS UTILITIES › Subchapter C - Safety › Part 255 - Transmission And Distribution Of Gas › Design of Pipeline Components › Section 255.161 - Supports and anchors

Current through Register Vol. 46, No. 28, July 10, 2024
(a) Each
					 pipeline and its associated equipment must have enough anchorage or support to:
(1) prevent undesigned-for strain on
					 connected equipment;
(2) resist
					 longitudinal forces caused by a bend or offset in the pipe; and
(3) prevent or damp out excessive
					 vibration.
New York Codes, Rules and Regulations › Title 16 - DEPARTMENT OF PUBLIC SERVICE › Chapter III - GAS UTILITIES › Subchapter C - Safety › Part 255 - Transmission And Distribution Of Gas › Design of Pipeline Components › Section 255.163 - Compressor stations: design and construction

Current through Register Vol. 46, No. 28, July 10, 2024
(a) Each main compressor building of a
					 compressor station must be located on property under the control of the
					 operator. It must be far enough away from adjacent property, not under control
					 of the operator, to minimize the possibility of catching on fire from a
					 conflagration at structures on adjacent property. There must be enough open
					 space around the main compressor building to allow the free movement of
					 firefighting equipment.
(b) Each
					 building on a compressor station site must be made of noncombustible materials
					 if it contains either:
(1) pipe more than two
					 inches (51 millimeters) in diameter that is carrying gas under pressure;
					 or
(2) gas handling equipment other
					 than gas utilization equipment used for domestic purposes.
New York Codes, Rules and Regulations › Title 16 - DEPARTMENT OF PUBLIC SERVICE › Chapter III - GAS UTILITIES › Subchapter C - Safety › Part 255 - Transmission And Distribution Of Gas › Design of Pipeline Components › Section 255.165 - Compressor stations: liquid removal

Current through Register Vol. 46, No. 28, July 10, 2024
(a) Where entrained vapors in gas may liquefy
					 under the anticipated pressure and temperature conditions, the compressor must
					 be protected against the introduction of those liquids in quantities that could
					 cause damage.
(b) Each liquid
					 separator used to remove entrained liquids at a compressor station must:
(1) have a manually operable means of
					 removing these liquids;
(2) have
					 either automatic liquid removal facilities, an automatic compressor shut-down
					 device, or a high liquid level alarm where slugs of liquid could be carried
					 into the compressors; and
(3) be
					 manufactured in accordance with section VIII of the ASME Boiler and Pressure
					 Vessel Code (as described in section
					 10.3 
					 of this Title), except that liquid separators constructed of pipe and fittings
					 without internal welding must be fabricated with a design factor of 0.4, or
					 less.
New York Codes, Rules and Regulations › Title 16 - DEPARTMENT OF PUBLIC SERVICE › Chapter III - GAS UTILITIES › Subchapter C - Safety › Part 255 - Transmission And Distribution Of Gas › Design of Pipeline Components › Section 255.167 - Compressor stations: emergency shutdown

Current through Register Vol. 46, No. 28, July 10, 2024
Except for unattended field compressor stations of 1,000
						horsepower (746 kilowatts) or less, each compressor station must have an
						emergency shutdown system that meets the following:
(a) It must be able to block gas out of the
					 station and blow down the station piping.
(b) It must discharge gas from the blow down
					 piping at a location where the gas will not create a hazard.
(c) It must provide means for extinguishing
					 gas fires and for the shutdown of gas compressing equipment, and electrical
					 facilities in the vicinity of gas headers and in the compressor building,
					 except that electrical circuits that supply emergency lighting required to
					 assist station personnel in evacuating the compressor building and the area in
					 the vicinity of the gas headers must remain energized and electrical circuits
					 needed to protect equipment from damage may remain energized.
(d) It must be operable from at least two
					 locations, each of which is:
(1) outside the
					 gas area of the station;
(2) near
					 the exit gates, if the station is fenced, or near emergency exits, if not
					 fenced; and
(3) not more than 500
					 feet (152.4 meters) from the limits of the station.
New York Codes, Rules and Regulations › Title 16 - DEPARTMENT OF PUBLIC SERVICE › Chapter III - GAS UTILITIES › Subchapter C - Safety › Part 255 - Transmission And Distribution Of Gas › Design of Pipeline Components › Section 255.169 - Compressor stations: pressure limiting devices

Current through Register Vol. 46, No. 28, July 10, 2024
(a) Each compressor station must have
					 pressure relief or other suitable protective devices of sufficient capacity and
					 sensitivity to ensure that the maximum allowable operating pressure of the
					 station piping and equipment is not exceeded by more than 10 percent.
(b) Each vent line that exhausts gas from the
					 pressure relief valves of a compressor station must extend to a location where
					 the gas may be discharged without hazard.
(c) A pressure relief valve shall be
					 installed in the discharge line of each positive-displacement transmission
					 compressor between the gas compressor and the first discharge block valve. The
					 relieving capacity shall be equal to or greater than the capacity of the
					 compressor.
New York Codes, Rules and Regulations › Title 16 - DEPARTMENT OF PUBLIC SERVICE › Chapter III - GAS UTILITIES › Subchapter C - Safety › Part 255 - Transmission And Distribution Of Gas › Design of Pipeline Components › Section 255.171 - Compressor stations: additional safety equipment

Current through Register Vol. 46, No. 28, July 10, 2024
(a) Each compressor station must have
					 adequate fire protection facilities. If fire pumps are a part of these
					 facilities, their operation may not be affected by the emergency shutdown
					 system.
(b) Each compressor station
					 prime mover, other than an electrical induction or synchronous motor, must have
					 an automatic device to shut down the unit before the speed of either the prime
					 mover or the driven unit exceeds a maximum safe speed.
(c) Each compressor unit in a compressor
					 station must have a shutdown or alarm device that operates in the event of
					 inadequate cooling or lubrication of the unit.
(d) Each compressor station gas engine that
					 operates with pressure gas injection must be equipped so that stoppage of the
					 engine automatically shuts off the fuel and vents the engine distribution
					 manifold.
(e) Each muffler for a
					 gas engine in a compressor station must have vent slots or holes in the baffles
					 of each compartment to prevent gas from being trapped in the muffler.
(f) All fuel gas lines within a compressor
					 station, serving the various buildings and residential areas, shall be provided
					 with master shut-off valves located outside of any building or residential
					 area.
New York Codes, Rules and Regulations › Title 16 - DEPARTMENT OF PUBLIC SERVICE › Chapter III - GAS UTILITIES › Subchapter C - Safety › Part 255 - Transmission And Distribution Of Gas › Design of Pipeline Components › Section 255.173 - Compressor stations: ventilation

Current through Register Vol. 46, No. 28, July 10, 2024
Each compressor station building must be ventilated to
						ensure that employees are not endangered by the accumulation of gas in rooms,
						sumps, attics, pits, or other enclosed places.
New York Codes, Rules and Regulations › Title 16 - DEPARTMENT OF PUBLIC SERVICE › Chapter III - GAS UTILITIES › Subchapter C - Safety › Part 255 - Transmission And Distribution Of Gas › Design of Pipeline Components › Section 255.179 - Valves on pipelines to operate at 125 psig (862 kpa) or more

Current through Register Vol. 46, No. 28, July 10, 2024
(a) Each pipeline
					 to operate at 125 psig (862 kPa) or more must have sectionalizing block valves
					 spaced according to the following:
(1) Each
					 point on the pipeline in a Class 4 location must be within 1/2 mile (0.805
					 kilometer) of a valve.
(2) Each
					 point on the pipeline in a Class 3 location must be within two miles (3.22
					 kilometers) of a valve.
(3) Each
					 point on the pipeline in a Class 2 location must be within 31/2 miles (5.63
					 kilometers) of a valve.
(4) Each
					 point on the pipeline in a Class 1 location must be within five miles (8.05
					 kilometers) of a valve.
New York Codes, Rules and Regulations › Title 16 - DEPARTMENT OF PUBLIC SERVICE › Chapter III - GAS UTILITIES › Subchapter C - Safety › Part 255 - Transmission And Distribution Of Gas › Design of Pipeline Components › Section 255.181 - Distribution line valves

Current through Register Vol. 46, No. 28, July 10, 2024
(a) Each
					 high pressure distribution system must have valves spaced so as to reduce the
					 time to shut down a section of main in an emergency. The valve spacing is
					 determined by the operating pressure, the size of the mains, and the local
					 physical conditions as well as the number and type of consumers that might be
					 affected by a shutdown.
(b) Each
					 regulator station controlling the flow or pressure of gas in a distribution
					 system must have a valve installed on the inlet piping at a distance from the
					 regulator station sufficient to permit the operation of the valve during an
					 emergency.
(1) Such distance must be at least
					 50 feet (15.2 meters) but no more than 1,000 feet (304.8 meters) from the
					 regulator.
(2) Under unique
					 circumstances which make it impractical to locate the valve at least 50 feet
					 (15.2 meters) from the regulator, a lesser, approved spacing may be
					 used.
New York Codes, Rules and Regulations › Title 16 - DEPARTMENT OF PUBLIC SERVICE › Chapter III - GAS UTILITIES › Subchapter C - Safety › Part 255 - Transmission And Distribution Of Gas › Design of Pipeline Components › Section 255.183 - Vaults: structural design requirements

Current through Register Vol. 46, No. 28, July 10, 2024
(a) Each underground vault or pit for valves,
					 pressure relieving, pressure limiting, or pressure regulating equipment, must
					 be able to meet the loads which may be imposed upon it, and to protect
					 installed equipment.
(b) There must
					 be enough working space so that all of the equipment required in the vault or
					 pit can be properly installed, operated, and maintained.
(c) Each pipe entering, or within, a
					 regulator vault or pit must be steel for sizes 10 inches (254 millimeters) and
					 less, except that control and gauge piping may be copper. Where pipe extends
					 through the vault or pit structure, provision must be made to prevent the
					 passage of gasses or liquids through the opening and to avert strains in the
					 pipe.
(d) In the design of vaults
					 and pits for pressure limiting, pressure relieving, and pressure regulating
					 equipment, consideration shall be given to the protection of the installed
					 equipment from damage, such as that resulting from an explosion within the
					 vault or pit, which may cause portions of the roof or cover to fall into the
					 vault.
(e) Vault or pit openings
					 shall be located so as to minimize the hazards of tools or other objects
					 falling upon the regulator, piping, or other equipment. The control piping and
					 the operating parts of the equipment installed shall not be located under a
					 vault or pit opening where workmen can step on them when entering or leaving
					 the vault or pit, unless such parts are suitably protected.
(f) Whenever a vault or pit opening is to be
					 located above equipment which could be damaged by a falling cover, a circular
					 cover shall be installed or other suitable precautions taken.
New York Codes, Rules and Regulations › Title 16 - DEPARTMENT OF PUBLIC SERVICE › Chapter III - GAS UTILITIES › Subchapter C - Safety › Part 255 - Transmission And Distribution Of Gas › Design of Pipeline Components › Section 255.185 - Vaults: accessibility

Current through Register Vol. 46, No. 28, July 10, 2024
Each vault must be located in an accessible location and,
						so far as practical, away from:
(a)
					 street intersections or points where traffic is heavy or dense;
(b) points of minimum elevation, catch
					 basins, or places where the access cover will be in the course of surface
					 waters; and
(c) water, electric,
					 steam or other facilities.
New York Codes, Rules and Regulations › Title 16 - DEPARTMENT OF PUBLIC SERVICE › Chapter III - GAS UTILITIES › Subchapter C - Safety › Part 255 - Transmission And Distribution Of Gas › Design of Pipeline Components › Section 255.187 - Vaults: sealing, venting and ventilation

Current through Register Vol. 46, No. 28, July 10, 2024
(a) Each underground vault or closed top pit
					 containing either a pressure regulating or reducing station, or a pressure
					 limiting or relieving station, must be sealed, vented or ventilated.
(b) When the internal volume exceeds 200
					 cubic feet (5.66 cubic meters), each of the following apply:
(1) The vault or pit must be ventilated with
					 two ducts, each having at least the ventilating effect of a pipe four inches
					 (102 millimeters) in diameter.
(2)
					 The ventilation must be enough to minimize the formation of combustible
					 atmosphere in the vault or pit.
(3)
					 The ducts must be high enough above grade to disperse any gas-air mixtures that
					 might be discharged.
New York Codes, Rules and Regulations › Title 16 - DEPARTMENT OF PUBLIC SERVICE › Chapter III - GAS UTILITIES › Subchapter C - Safety › Part 255 - Transmission And Distribution Of Gas › Design of Pipeline Components › Section 255.189 - Vaults: drainage and waterproofing

Current through Register Vol. 46, No. 28, July 10, 2024
(a) Each vault must be designed so as to
					 minimize the entrance of water. Nevertheless, vault equipment shall be designed
					 to operate safely, if submerged.
(b) A vault containing gas piping may not be
					 connected by means of a drain connection to any other underground
					 structure.
(c) All electrical
					 equipment in vaults must conform to the applicable requirements of Class 1,
					 Group D, of the National Electrical Code, NFPA 70 (as described in section
					 10.3 
					 of this Title).
New York Codes, Rules and Regulations › Title 16 - DEPARTMENT OF PUBLIC SERVICE › Chapter III - GAS UTILITIES › Subchapter C - Safety › Part 255 - Transmission And Distribution Of Gas › Design of Pipeline Components › Section 255.190 - Calorimeter or calorimixer structures

Current through Register Vol. 46, No. 28, July 10, 2024
(a) Unmanned structures housing calorimeters
					 or calorimixers shall be designed so that the egress shall be directly to and
					 from the outside, and all air movements shall be directly to and from the
					 outside atmosphere. All associated devices which may vent gas shall be vented
					 through piping to the outside atmosphere.
(b) Unmanned rooms with such gas burning
					 equipment shall be equipped with sensing devices which provide for both the
					 automatic shutdown of the gas supply to such rooms and the signalling of an
					 alarm at a continuously manned post. All alarms shall be immediately
					 investigated.
(c) Combustible
					 material associated with such gas-burning equipment shall be stored safely, and
					 in a manner which separates them from sources of ignition.
New York Codes, Rules and Regulations › Title 16 - DEPARTMENT OF PUBLIC SERVICE › Chapter III - GAS UTILITIES › Subchapter C - Safety › Part 255 - Transmission And Distribution Of Gas › Design of Pipeline Components › Section 255.191 - Design pressure of plastic fittings

Current through Register Vol. 46, No. 28, July 10, 2024
(a) The design pressure of polyvinyl chloride
					 (PVC) Schedules-40 and 80 thermoplastic fittings must be obtained from the
					 following table:
PVC Type II
Class Location
Size inches
Schedule
1
2 & 3
4
1
2 & 3
4
1/2
40
100
100
100
100
100
100
80
100
100
100
100
100
100
3/4
40
100
100
96
100
100
100
80
100
100
100
100
100
100
1
40
100
100
90
90
100
100
80
100
100
100
100
100
100
80
100
100
100
100
100
100
11/4
40
100
92
74
100
100
100
80
100
100
100
100
100
100
11/2
40
100
83
86
100
100
100
80
100
100
94
100
100
100
2
40
89
69
55
100
100
100
80
100
100
81
100
100
100
21/2
40
99
76
61
100
100
100
80
100
100
85
100
100
100
3
40
84
66
53
100
100
100
80
100
94
75
100
100
100
31/2
40
77
60
48
100
100
96
80
100
86
69
100
100
100
4
40
71
56
44
100
100
89
80
100
81
65
100
100
100
5
40
82
49
39
100
97
78
80
93
72
58
100
100
100
6
40
56
44
35
100
88
71
80
89
70
56
100
100
100
Note:
These pressure ratings are the same value as the design
						pressure of the corresponding pipe size and schedule in the same class
						location, as determined by the formula given in section
						255.121  of
						this Part.
These pressure ratings are the same value as the design
						  pressure of the corresponding pipe size and schedule in the same class
						  location, as determined by the formula given in section
						  255.121  of
						  this Part and the limitations of section
						  255.123.
New York Codes, Rules and Regulations › Title 16 - DEPARTMENT OF PUBLIC SERVICE › Chapter III - GAS UTILITIES › Subchapter C - Safety › Part 255 - Transmission And Distribution Of Gas › Design of Pipeline Components › Section 255.193 - Valve installation in plastic pipe

Current through Register Vol. 46, No. 28, July 10, 2024
Each valve installed in plastic pipe must be designed so
						as to protect the plastic material against excessive torsional or shearing
						loads when the valve or shut-off is operated, and from any other secondary
						stresses that might be exerted through the valve or its
						enclosure.
New York Codes, Rules and Regulations › Title 16 - DEPARTMENT OF PUBLIC SERVICE › Chapter III - GAS UTILITIES › Subchapter C - Safety › Part 255 - Transmission And Distribution Of Gas › Overpressure Protection › Section 255.194 - Scope

Current through Register Vol. 46, No. 28, July 10, 2024
Sections
						255.195
						through
						255.203 
						of this Part prescribe the minimum requirements for the design and installation
						of overpressure protection devices.
New York Codes, Rules and Regulations › Title 16 - DEPARTMENT OF PUBLIC SERVICE › Chapter III - GAS UTILITIES › Subchapter C - Safety › Part 255 - Transmission And Distribution Of Gas › Overpressure Protection › Section 255.195 - Protection against accidental overpressuring

Current through Register Vol. 46, No. 28, July 10, 2024
(a) Except as provided in section
					 255.197 
					 of this Part, each pipeline that is connected to a gas source so that the
					 maximum allowable operating pressure could be exceeded as the result of
					 pressure control failure or of some other type of failure, must have pressure
					 relieving or pressure limiting devices that meet the requirements of sections
					 255.199
					 and
					 255.201 
					 of this Part.
(b) Additionally,
					 each distribution system that is supplied from a source of gas that is at a
					 higher pressure than the maximum allowable operating pressure for the system
					 must:
(1) have pressure regulation devices
					 capable of meeting the pressure, load, and other service conditions that will
					 be experienced in normal operation of the system; and that could be activated
					 in the event of failure of some portion of the system; and
(2) be designed so as to prevent accidental
					 overpressuring.
New York Codes, Rules and Regulations › Title 16 - DEPARTMENT OF PUBLIC SERVICE › Chapter III - GAS UTILITIES › Subchapter C - Safety › Part 255 - Transmission And Distribution Of Gas › Overpressure Protection › Section 255.197 - Control of the pressure of gas delivered from high pressure distribution systems

Current through Register Vol. 46, No. 28, July 10, 2024
(a) If the
					 maximum actual operating pressure of the distribution system is 60 psig (414
					 kPa) or less and a service regulator having the following characteristics is
					 used, no other pressure limiting device is required.
(1) The regulator is capable of reducing
					 distribution line pressure to pressures recommended for household
					 appliances.
(2) It has a single
					 port valve with proper orifice for the maximum gas pressure at the regulator
					 inlet.
(3) The valve seat is made
					 of resilient material designed to withstand abrasion by the gas, impurities in
					 gas, cutting by the valve, and also to resist permanent deformation when it is
					 pressed against the valve port.
(4)
					 The pipe connections to the regulator do not exceed two inches (51 millimeters)
					 in diameter.
(5) The regulator,
					 under normal operating conditions, is able to regulate the downstream pressure
					 within the necessary limits of accuracy and to limit the build-up of pressure
					 under no- flow conditions to prevent a pressure that would cause the unsafe
					 operation of any connected and properly adjusted gas utilization
					 equipment.
(6) The regulator is
					 self-contained with no external static or control lines.
(7) The regulator is of a type including a
					 relief valve which is vented to the atmosphere with the relief valve set to
					 open so that the pressure of the gas going to the customer does not exceed the
					 maximum safe pressure as established by this Part.
New York Codes, Rules and Regulations › Title 16 - DEPARTMENT OF PUBLIC SERVICE › Chapter III - GAS UTILITIES › Subchapter C - Safety › Part 255 - Transmission And Distribution Of Gas › Overpressure Protection › Section 255.199 - Requirements for design of pressure relief and limiting devices

Current through Register Vol. 46, No. 28, July 10, 2024
(a) Except for
					 rupture discs, each pressure relief or pressure limiting device must:
(1) be constructed of materials such that the
					 operation of a device will not be impaired by corrosion;
(2) have valves and valve seats that are
					 designed not to stick in a position that will make the device
					 inoperative;
(3) be designed and
					 installed so that it can be readily operated to determine if the valve is free,
					 can be tested to determine the pressure at which it will operate, and can be
					 tested for leakage when in the closed position;
(4) have its support made of noncombustible
					 material;
(5) have discharge
					 stacks, vents, or outlet ports designed to prevent accumulation of water, ice,
					 or snow, located where gas can be discharged into the atmosphere without undue
					 hazard;
(6) be designed and
					 installed so that the size of the opening, pipe, and fittings located between
					 the system to be protected and the pressure-relieving device, and the size of
					 the vent line, are adequate to prevent hammering of the valve and to prevent
					 impairment of relief capacity;
(7)
					 where installed at a district regulator station to protect a pipeline system
					 from overpressuring, be designed and installed in compliance with subdivision
					 (b) of this section to prevent any single incident such as an explosion in a
					 vault or damage by a vehicle from affecting the operation of both the
					 overpressure protection device and the district regulator;
(8) except for a valve that will isolate the
					 system under protection from its source of pressure be designed to prevent
					 unauthorized operation of any stop valve that will make the pressure relief
					 valve or pressure-limiting device inoperative; and
(9) where gas pressures are reduced in two or
					 more stages to supply pipelines except field regulators, be designed and
					 installed in compliance with subdivision (b) of this section so that any single
					 incident in one stage will not adversely affect another stage.
New York Codes, Rules and Regulations › Title 16 - DEPARTMENT OF PUBLIC SERVICE › Chapter III - GAS UTILITIES › Subchapter C - Safety › Part 255 - Transmission And Distribution Of Gas › Overpressure Protection › Section 255.201 - Required capacity of pressure relieving and limiting stations

Current through Register Vol. 46, No. 28, July 10, 2024
(a) Each
					 pressure-relief or pressure-limiting station or group of stations installed in
					 a low pressure distribution system must have enough capacity, and must be set
					 to operate, to ensure that the pressure may not cause the unsafe operation of
					 any connected and properly adjusted gas utilization equipment.
(b) Each pressure-relief or pressure-limiting
					 station or group of stations installed in pipelines other than low-pressure
					 distribution systems must have enough capacity, and must be set to operate to
					 limit the pressure according to the following paragraphs:
(1) If the maximum allowable operating
					 pressure is 60 psig (414 kPa) or more, the pressure may not exceed the maximum
					 allowable operating pressure plus 10 percent, or the pressure that produces a
					 hoop stress of 75 percent of SMYS, whichever is lower.
(2) If the maximum allowable operating
					 pressure is 12 psig (83 kPa) or more, but less than 60 psig (414 kPa), the
					 pressure may not exceed the maximum allowable operating pressure plus 6 psig
					 (41.4 kPa).
(3) If the maximum
					 allowable operating pressure is less than 12 psig (83 kPa), the pressure may
					 not exceed the maximum allowable operating pressure plus 50 percent.
New York Codes, Rules and Regulations › Title 16 - DEPARTMENT OF PUBLIC SERVICE › Chapter III - GAS UTILITIES › Subchapter C - Safety › Part 255 - Transmission And Distribution Of Gas › Overpressure Protection › Section 255.203 - Instrument, control and sampling piping and components

Current through Register Vol. 46, No. 28, July 10, 2024
(a) This section applies to the design of
					 instrument, control, and sampling piping and components. It does not apply to
					 permanently closed systems, such as fluid-filled temperature-responsive
					 devices.
(b) All materials employed
					 for pipe and components must be designed to meet the particular conditions of
					 service and the following paragraphs:
(1) Each
					 takeoff connection and attaching boss, fitting, or adapter must be made of
					 material suitable to withstand the maximum service pressure and temperature of
					 the pipe or equipment to which it is attached, and be designed to
					 satisfactorily withstand all stresses without failure by fatigue.
(2) Except for takeoff lines that can be
					 isolated from sources of pressure by other valving, a shut-off valve must be
					 installed in each takeoff line as near as practicable to the point of takeoff.
					 Blow-down valves must be installed where necessary.
(3) Brass or copper material may not be used
					 for metal temperatures greater than 400° F (204° C).
(4) Pipe or components that may contain
					 liquids must be protected by heating or other means from damage due to
					 freezing.
(5) Pipe or components in
					 which liquids may accumulate must have drains or drips.
(6) Pipe or components subject to clogging
					 from solids or deposits must have suitable connections for cleaning.
(7) The arrangement of pipe, components, and
					 supports must provide safety under anticipated operating stresses.
(8) Each joint between sections of pipe, and
					 between pipe and valves or fittings, must be made in a manner suitable for the
					 anticipated pressure and temperature condition. Slip type expansion joints may
					 not be used. Expansion must be allowed for by providing flexibility within the
					 system itself.
(9) Each control
					 line must be protected from anticipated causes of damage and must be designed
					 and installed to prevent damage to any one control line from making both the
					 regulator and the over-pressure protective device inoperative.
New York Codes, Rules and Regulations › Title 16 - DEPARTMENT OF PUBLIC SERVICE › Chapter III - GAS UTILITIES › Subchapter C - Safety › Part 255 - Transmission And Distribution Of Gas › Overpressure Protection › Section 2555.204 - Risers installed after January 22, 2019

Current through Register Vol. 46, No. 28, July 10, 2024
(a) Riser designs must be tested to ensure
					 safe performance under anticipated external and internal loads acting on the
					 assembly.
(b) Factory assembled
					 anodeless risers must be designed and tested in accordance with ASTM F1973 (as
					 described in section
					 10.3 
					 of this Title).
(c) All risers used
					 to connect regulator stations to plastic mains must be rigid and designed to
					 provide adequate support and resist lateral movement. Anodeless risers used in
					 accordance with this paragraph must have a rigid riser casing.
New York Codes, Rules and Regulations › Title 16 - DEPARTMENT OF PUBLIC SERVICE › Chapter III - GAS UTILITIES › Subchapter C - Safety › Part 255 - Transmission And Distribution Of Gas › Welding of Steel in Pipelines › Section 255.221 - Scope

Current through Register Vol. 46, No. 28, July 10, 2024
(a) Sections
					 255.225
					 through
					 255.245 
					 of this Part prescribe minimum requirements for welding steel materials in
					 pipelines.
(b) These sections do
					 not apply to welding that occurs during the manufacture of steel pipe or steel
					 pipeline components.
New York Codes, Rules and Regulations › Title 16 - DEPARTMENT OF PUBLIC SERVICE › Chapter III - GAS UTILITIES › Subchapter C - Safety › Part 255 - Transmission And Distribution Of Gas › Welding of Steel in Pipelines › Section 255.225 - Qualification of welding procedures

Current through Register Vol. 46, No. 28, July 10, 2024
(a) Welding must be performed by a qualified
					 welder or welding operator in accordance with welding procedures qualified
					 under section 5, section 12, Appendix A or Appendix B of API Standard 1104 (as
					 described in section
					 10.3 
					 of this Title), or section IX of the ASME Boiler and Pressure Vessel Code (ASME
					 BPVC) (as described in section
					 10.3 
					 of this Title) to produce welds meeting the requirements of sections
					 255.221 through
					 255.245 
					 of this Part. The quality of the test welds used to qualify welding procedures
					 shall be determined by destructive testing in accordance with the applicable
					 welding standard(s).
(b) Each
					 welding procedure must be recorded in detail, including the results of the
					 qualifying tests. This record must be retained and followed whenever the
					 procedure is used.
New York Codes, Rules and Regulations › Title 16 - DEPARTMENT OF PUBLIC SERVICE › Chapter III - GAS UTILITIES › Subchapter C - Safety › Part 255 - Transmission And Distribution Of Gas › Welding of Steel in Pipelines › Section 255.227 - Qualification of welders

Current through Register Vol. 46, No. 28, July 10, 2024
(a) Except
					 as provided in subdivision (b) of this section, each welder must be qualified
					 in accordance with section 6 of API Standard 1104 (as described in section
					 10.3 
					 of this Title) or section IX of the ASME Boiler and Pressure Vessel Code (as
					 described in section
					 10.3 
					 of this Title). However, a welder qualified under an earlier edition than
					 listed in section
					 10.3 
					 of this Title may weld but may not requalify under that earlier
					 edition.
(b) A welder may qualify
					 to perform welding on pipe to be operated at a pressure of less than 125 psig
					 (862 kPa) by performing an acceptable test weld, for the welding process to be
					 used, under the test set forth in section I of Appendix 14-F of this Title. A
					 welder who makes welded service line connections to mains must also perform an
					 acceptable test weld under section II of Appendix 14-F of this Title as a part
					 of his qualifying test.
New York Codes, Rules and Regulations › Title 16 - DEPARTMENT OF PUBLIC SERVICE › Chapter III - GAS UTILITIES › Subchapter C - Safety › Part 255 - Transmission And Distribution Of Gas › Welding of Steel in Pipelines › Section 255.229 - Limitations on welders

Current through Register Vol. 46, No. 28, July 10, 2024
(a) No welder
					 whose qualification is based on nondestructive testing may weld compressor
					 station pipe and components.
(b) No
					 welder may weld with a particular welding process unless, within the preceding
					 six calendar months, he has engaged in welding with that process.
(c) A welder qualified under section
					 255.227(a) 
					 of this Part may not weld unless within the preceding six calendar months the
					 welder has had one weld tested and found acceptable under section 6 or 9 of API
					 Standard 1104 (as described in section
					 10.3 
					 of this Title), except that a welder qualified under an earlier edition than
					 listed in section
					 10.3 
					 of this Title may weld but may not qualify under that earlier
					 edition.
(d) A welder qualified
					 under section
					 255.227(b) 
					 of this Part may not weld unless:
(1) within
					 the preceding 15 calendar months, the welder has requalified, except that the
					 welder must requalify at least once each calendar year; or
(2) within the preceding 71/2 calendar
					 months, but at least twice each calendar year, the welder has had:
(i) a production weld cut out, tested and
					 found acceptable in accordance with the qualifying test; or
(ii) a production weld tested and found
					 acceptable under section 6 of API Standard 1104 (as described in section
					 10.3 
					 of this Title); or
(iii) for
					 welders who work only on service lines two inches (51 millimeters) or smaller
					 in diameter, two sample welds tested and found acceptable in accordance with
					 the test in section III of Appendix 14-F to this Title.
New York Codes, Rules and Regulations › Title 16 - DEPARTMENT OF PUBLIC SERVICE › Chapter III - GAS UTILITIES › Subchapter C - Safety › Part 255 - Transmission And Distribution Of Gas › Welding of Steel in Pipelines › Section 255.230 - Quality assurance program

Current through Register Vol. 46, No. 28, July 10, 2024
(a) Each operator shall conduct an
					 unannounced spot check of each welder's field welds at least once each calendar
					 year to assess the quality of welding. Such spot checks shall include
					 destructive or nondestructive tests of a field weld. Should an unannounced spot
					 check of a welder identify unacceptable welds, a follow-up unannounced spot
					 check shall be conducted within three months or as soon as possible
					 thereafter.
(b) A field weld chosen
					 during the unannounced spot check may be used to maintain the welder's
					 qualification if tested and found acceptable under section 3 or 6 of API
					 Standard 1104 (as described in section
					 10.3 
					 of this Title) for welders qualified under section
					 255.227(a) 
					 of this Part.
(c) In the case of
					 welders qualified under section
					 255.227(b) 
					 of this Part, the spot check must follow the test procedures set forth in
					 Appendix 14-F of this Title.
(d)
					 This unannounced test may be used to satisfy the requirement to have a weld
					 tested during the six months preceding welding as required in section
					 255.229(c) or
					 (d)(2)  of this Part.
New York Codes, Rules and Regulations › Title 16 - DEPARTMENT OF PUBLIC SERVICE › Chapter III - GAS UTILITIES › Subchapter C - Safety › Part 255 - Transmission And Distribution Of Gas › Welding of Steel in Pipelines › Section 255.231 - Protection from weather

Current through Register Vol. 46, No. 28, July 10, 2024
The welding operation must be protected from weather
						conditions that would impair the quality of the completed
						weld.
New York Codes, Rules and Regulations › Title 16 - DEPARTMENT OF PUBLIC SERVICE › Chapter III - GAS UTILITIES › Subchapter C - Safety › Part 255 - Transmission And Distribution Of Gas › Welding of Steel in Pipelines › Section 255.233 - Miter joints

Current through Register Vol. 46, No. 28, July 10, 2024
(a) A miter
					 joint on steel pipe to be operated at a pressure that produces a hoop stress of
					 30 percent or more of SMYS may not deflect the pipe more than three
					 degrees.
(b) A miter joint on steel
					 pipe to be operated at a pressure that produces a hoop stress of less than 30
					 percent, but more than 10 percent, of SMYS may not deflect the pipe more than
					 121/2 degrees and must be a distance equal to one pipe diameter or more away
					 from any other miter joint, as measured from the crotch of each
					 joint.
(c) A miter joint on steel
					 pipe to be operated at a pressure that produces a hoop stress of 10 percent or
					 less of SMYS may not deflect the pipe more than 90 degrees.
New York Codes, Rules and Regulations › Title 16 - DEPARTMENT OF PUBLIC SERVICE › Chapter III - GAS UTILITIES › Subchapter C - Safety › Part 255 - Transmission And Distribution Of Gas › Welding of Steel in Pipelines › Section 255.235 - Preparation for welding

Current through Register Vol. 46, No. 28, July 10, 2024
(a) Before
					 beginning any welding, the welding surfaces must be clean and free of any
					 material that may be detrimental to the weld, and the pipe or component must be
					 aligned to provide the most favorable condition for depositing the root bead.
					 This alignment must be preserved while the root bead is being
					 deposited.
(b) See Appendix 14-J of
					 this Title for acceptable preparation for butt welding pipe of unequal
					 thicknesses.
New York Codes, Rules and Regulations › Title 16 - DEPARTMENT OF PUBLIC SERVICE › Chapter III - GAS UTILITIES › Subchapter C - Safety › Part 255 - Transmission And Distribution Of Gas › Welding of Steel in Pipelines › Section 255.237 - Preheating

Current through Register Vol. 46, No. 28, July 10, 2024
(a) Carbon steel
					 that has a carbon content in excess of 0.32 percent (heat analysis) or a carbon
					 equivalent (C + 1/4 Mn) of 0.65 percent (heat analysis) must he preheated
					 for welding.
(b) Carbon steel that
					 has a lower carbon content or carbon equivalent than the steels covered by
					 subdivision (a) of this section must be preheated for welding when preheating
					 will alleviate existing conditions that would limit the welding technique or
					 tend to adversely affect the quality of the weld.
(c) When steel materials with different
					 preheat temperatures are being preheated for welding, the higher temperature
					 must be used.
(d) Preheating may be
					 accomplished by any suitable method, provided that it is uniform and that the
					 temperature does not fall below the prescribed minimum during the actual
					 welding operation.
(e) Preheat
					 temperature must be monitored to ensure that the required preheat temperature
					 is reached before, and maintained during, the welding operation.
New York Codes, Rules and Regulations › Title 16 - DEPARTMENT OF PUBLIC SERVICE › Chapter III - GAS UTILITIES › Subchapter C - Safety › Part 255 - Transmission And Distribution Of Gas › Welding of Steel in Pipelines › Section 255.239 - Stress relieving

Current through Register Vol. 46, No. 28, July 10, 2024
(a) Except
					 as provided in subdivision (f) of this section, each weld on carbon steel that
					 has a carbon content in excess of 0.32 percent (heat analysis) or a carbon
					 equivalent (C + 1/4 Mn) in excess of 0.65 percent (heat analysis) must be
					 stress relieved as prescribed in section VIII of the ASME Boiler and Pressure
					 Vessel Code (as described in section
					 10.3 
					 of this Title).
(b) Except as
					 provided in subdivision (f) of this section, each weld on carbon steel that has
					 a carbon content of less than 0.32 percent (heat analysis) or a carbon
					 equivalent (C + 1/4 Mn) of less than 0.65 percent (heat analysis) must be
					 thermally stress relieved when conditions exist that would cause the weld to
					 cool at a rate detrimental to the quality of the weld.
(c) Except as provided in subdivision (f) of
					 this section, each weld on carbon steel pipe with a wall thickness of more than
					 11/4 inches (32 millimeters) must be stress relieved.
(d) When a weld connects pipe or components
					 that are of different thickness, the wall thickness to be used in determining
					 whether stress relieving is required under this section is:
(1) in the case of pipe connections, the
					 thicker of the two pipes joined; or
(2) in the case of branch connections,
					 slip-on flanges, or socket weld fittings, the thickness of the pipe run or
					 header.
New York Codes, Rules and Regulations › Title 16 - DEPARTMENT OF PUBLIC SERVICE › Chapter III - GAS UTILITIES › Subchapter C - Safety › Part 255 - Transmission And Distribution Of Gas › Welding of Steel in Pipelines › Section 255.241 - Inspection and test of welds

Current through Register Vol. 46, No. 28, July 10, 2024
(a)
					 Visual inspection of welding must be conducted by an individual qualified by
					 appropriate training and experience to ensure that the welding is performed in
					 accordance with the welding procedure and the weld is acceptable under
					 subdivision (c) of this section.
(b) The butt welds on each pipeline with a
					 nominal diameter greater than two inches (51 millimeters) to be operated at 125
					 psig (862 kPa) or more must be nondestructively tested in accordance with
					 section
					 255.243 
					 of this Part.
(c) The acceptability
					 of a weld that is nondestructively tested or visually inspected is determined
					 according to the standards in section 9 of API Standard 1104 (as described in
					 section
					 10.3 
					 of this Title). However, if a girth weld is unacceptable under those standards
					 for a reason other than a crack, and if the Appendix A to API Standard 1104
					 applies to the weld, the acceptability of the weld may be further determined
					 under that Appendix.
New York Codes, Rules and Regulations › Title 16 - DEPARTMENT OF PUBLIC SERVICE › Chapter III - GAS UTILITIES › Subchapter C - Safety › Part 255 - Transmission And Distribution Of Gas › Welding of Steel in Pipelines › Section 255.243 - Nondestructive testing-pipeline to operate at 125 psig (862 kpa) or more

Current through Register Vol. 46, No. 28, July 10, 2024
(a) Nondestructive
					 testing of welds must be performed by any process, other than trepanning, that
					 will clearly indicate defects that may affect the integrity of the
					 weld.
(b) Nondestructive testing of
					 welds must be performed in accordance with written procedures and by persons
					 who have been trained and qualified in the established procedures and with the
					 equipment employed in testing.
(c)
					 Procedures must be established for the proper interpretation of each
					 nondestructive test of a weld to ensure the acceptability of the weld under
					 section
					 255.241(c) 
					 of this Part.
(d) The following
					 percentages of each day's field butt welds, selected at random by the operator,
					 must be nondestructively tested over their entire circumference:
(1) in Class 1 locations, at least 10
					 percent;
(2) in Class 2 locations,
					 at least 15 percent;
(3) in Class 3
					 and Class 4 locations, 100 percent;
(4) in Class 1 or 2 locations at crossings of
					 major or navigable rivers, at crossings of major roads, and within railroad or
					 public highway rights-of-way, including tunnels, bridges, and overhead road
					 crossings, 100 percent; and
(5) at
					 pipeline tie-ins, including tie-ins of replacement sections, 100
					 percent.