This standard specifies the terms and definitions, model designation, structural type and basic dimension, technical requirements, examination and test methods, inspection rules, marking, packaging and storage and transportation of valves for liquefied petroleum gas cylinders (hereinafter referred to as “valves”).
This standard is applicable to the valves for liquefied petroleum gas cylinders, at an ambient temperature of -40℃~ +60℃, with a nominal working pressure of not greater than 2.5 MPa, and with a medium in accordance with GB 11174.
This standard is not applicable to valves for liquefied petroleum gas cylinders for vehicles.
Note: The pressure referenced in this standard refers to gauge pressure.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the normative document (including any amendments) applies.
GB/T 197 General purpose metric screw threads - Tolerances (GB/T 197-2003, ISO 965-1:1998, MOD)
GB/T 228.1 Metallic materials - Tensile testing - Part 1: Method of test at room temperature (GB/T 228.1 - 2010, ISO 6892-1: 2009, MOD)
GB/T 1184 Geometrical tolerancing - Geometrical tolerances for features without individual tolerance indications (GB/T 1184-1996, eqv ISO 2768-2:1989)
GB/T 1804 General tolerances - Tolerances for linear and angular dimensions without individual tolerance indications (GB/T 1804-2000, eqv ISO 2768-1:1989)
GB/T 3934 Specification of gauges for general purpose screw threads (GB/T 3934-2003, ISO 1502:1996, MOD)
GB/T 5121.1 Methods for chemical analysis of copper and copper alloys-Part 1: Determination of copper content (GB/T 5121.1-2008, ISO 1554.1976, ISO 1553:1976, MOD)
GB/T 5121.3 Copper and copper alloys-Determination of lead content (GB/T 5121.3-2008, ISO 4749:1984, MOD)
GB/T 5121.9 Methods for chemical analysis of copper and copper alloys-Part 9: Determination of iron content (GB/T 5121.9-2008, ISO 4748:1984, ISO 1812:1976, MOD)
GB/T 8335 Special threads for gas cylinders
GB/T 8336 Special thread gauges for gas cylinders
GB/T 10567.2 Wrought copper and copper alloys - Detection of residual stress - Ammonia test
GB 11174 Liquefied petroleum gas
GB/T 13005 Terminology of gas cylinders
GB/T 15382 General specifications of gas cylinder valves
3 Terms and definitions
For the purpose of this standard, the terms and definitions established in GB/T 13005 as well as the following ones apply.
3.1 non-removable valve
the valve that can be removed only by destroying the pressure parts on the valve, and can't work normally once removed
