CSA ANSI NGV 4.7-2020 pdf free download – Automatically pressure operated valves for natural gas dispensing systems.
2 Reference publications
This Standard refers to the following publications, and where such reference is made, it shall be to the edition listed below.
CSA Group
B108-18
Natural gas refuelling stations installation code
C22.2 No. 0.15:15 (R2020)
Adhesive labels
C22.2 No. 139:13 (R2018)
Electrically operated valves
ASME (American Society of Mechanical Engineers)
B1.1-2003 (R2018)
Unified Inch Screw Threads, UN and UNR Thread Form
ASTM International
B117-19
Standard Practice for Operating Salt Spray (Fog) Apparatus
ISO (International Organization for Standardization)
68-1:1998
ISO general purpose screw threads — Basic profile — Part 1: Metric screw threads
68-2:1998
ISO general-purpose screw threads — Basic profile — Part 2: Inch screw threads
261:1998
ISO general purpose metric screw threads — General plan
NFPA (National Fire Protection Association)
NFPA 52-2019
Vehicular Natural Gas Fuel Systems Code
SAE International
ANSI SAE J525-2016
Welded And Cold Drawn Low-Carbon Steel Tubing Annealed For Bending And Flaring
UL (Underwriters Laboratories)
429-2013
UL Standard for Safety Electrically Operated Valves
842-2015
Valves For Flammable Fluids
969:2017
UL standard for safety marking and labeling systems
1203:13
Ul Standard for Safety Explosion-Proof and Dust-Ignition-Proof Electrical Equipment for Use inHazardous (Classified) Locations
1769-2015
ul Standard for Safety Cylinder Valves
3 Definitions
The following definitions shall apply in this Standard:
Dispensing system – a device intended to transfer compressed natural gas.
Fitting 一 an item in a piping or tubing system that is used as a connector, such as an elbow, returnbend, tee, union, bushing, coupling, cross, or nipple, but not including such functioning items as a valveor pressure regulator.
Manufacturer – the person or organization responsible for the design, fabrication, and testing of theequipment and components.
Maximum allowable working pressure — the maximum pressure to which a component is designed tobe subjected when handling the specified fluid at the maximum specified temperature.
Pressure —
Service – the settled pressure at a uniform gas temperature of 21 °C(70 °F).This pressure istypically 20.7 MPa (30o0 psi) or 24.8 MPa (3600 psi).
Test — the pressure to which a component or equipment is taken during testing.Note: Pressure is expressed as psi, kPa,MPa, or bar.
Tool, special – a tool that is not available on the open retail market.
Valve – a device by which the flow of a fluid can be started, stopped, or regulated by a movable partwhich opens or obstructs passage.
Automatic — a self-actuated or remotely actuated device consisting essentially of a valve andoperator.
Check – a valve which allows gas to flow in only one direction.
a) Class A- a valve which is used as a normal part of the appliance or system operation.b) class B— a valve which is used to shut off gas flow to a component or components for the
purpose of service or replacement.
Pressure relief – a device that prevents a pre-determined upstream pressure from being exceeded.
4 Construction
4.1 General
4.1.1 Items unique to Canada
For items unique to Canada, see Annex A.
4.1.2 Class A and Class B valve clarification
A valve that complies with the requirements for a Class A valve may be used for a Class B valve application; however, a Class B valve shall not be substituted for a Class A valve (Clause 3).CSA ANSI NGV 4.7 pdf download