CSA ANSI NGV 4.7:2020 pdf download.Automatically pressure operated valves for natural gas dispensing systems.
1.1 Types of valves in the scope of CSA ANSI NGV 4.7
The requirements of this Standard apply to automatic valves used in compressed natural gas dispensing systems as specified in Table 1.
1.2 Terminology
In CSA ANSI NGV 4.7, “shall” is used to express a requirement, i.e., a provision that the user is obliged to satisfy in order to comply with the Standard; “should” is used to express a recommendation or that which is advised but not required; and “may” is used to express an option or that which is permissible within the limits of the Standard.
Notes accompanying clauses do not include requirements or alternative requirements; the purpose of a note accompanying a clause is to separate from the text explanatory or informative material.
Notes to tables and figures are considered part of the table or figure and may be written as requirements.
Annexes are designated normative (mandatory) or informative (non-mandatory) to define their application.
1.3 Units of measure
The values given in SI units are the units of record for the purposes of this Standard. The values given in parentheses are for information and comparison only.
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
UI (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
3 Definitions
The following definitions shall apply in CSA ANSI NGV 4.7:
Dispensing system — a device intended to transfer compressed natural gas.
Fitting — an item in a piping or tubing system that is used as a connector, such as an elbow, return bend, tee, union, bushing, coupling, cross, or nipple, but not including such functioning items as a valve or pressure regulator.
Manufacturer — the person or organization responsible for the design, fabrication, and testing of the equipment and components.
Maximum allowable working pressure — the maximum pressure to which a component is designed to be subjected when handling the specified fluid at the maximum specified temperature.CSA ANSI NGV 4.7 pdf download.