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CSA CGA 3.11-M88 Document Information:
Title
Lever Operated Pressure Lubricated Plug Type Gas Shut-Off Valves
CSA Standards
Publication Date:
Mar 1, 1988
Scope:
This Standard applies to manual lever operated, pressure
lubricated, straight way gas shut-off valves of metallic
construction with weld and flanged and threaded ends.
This Standard applies to valves used in:
a. appliances and equipment where gas is to be used for fuel
purposes and,
b. piping and tubing systems falling with in the pressure
limitations covered in this Standard.
This Standard sets forth the minimum capabilities which a
valve must possess in order to be considered suitable for use with
natural gas, manufactured gas and liquefied petroleum gases
(distributed as vopour with or without the admixture of air), or
mixtures thereof.
Note: Valves covered by this standard may be used on "digester
gas" (methane produced during sewage treatment) but because of
entrained contaminants their use shall be subject to agreement
between the manufacturer and the purchaser.
Valves covered by this Standard may not be used on "sour gas"
(gas with entrained hydrogen sulphide) without modification i.e.
additional requirements. Manufacturers should be consulted for
their recommendation and agreement reached between the manufacturer
and purchaser.
Requirements for valves NPS 1/4 to 8 are specified.
This Standard covers valves that are suitable for use in
the services specified in 1.1.6 over a pressure range of zero to
860 kpa (125 psig) and in addition shall withstand field pressure
testing to a maximum permissable pressure of 1290 kpa (187
psig).
Note: The obturator must not be moved while the valve is at a
pressure exceeding the rated maximum operating pressure.
This Standard contains SI (Metric) equivalents to the yard/pound
quantities, the purpose being to allow the Standard to be used in
SI (Metric) units. If a value for a measurement as given in this
Standard is followed by on equivalent value in other units, the
first stated is to be regarded as the requirement. The given
equivalent may be approximate. If a value for a measurement and an
equivalent value in other units are both specified as a quoted
marking requirement, the first stated unit, or both units shall be
provided.
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