GB/T 15382-2021 English PDF (GBT15382-2021)

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GB/T 15382-2021: General specifications of gas cylinder valves
GB/T 15382-2021
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 23.020.30
CCS J 74
Replacing GB/T 15382-2009, GB/T 10879-2009
General specifications of gas cylinder valves
(ISO 10297:2014, Gas cylinders - Cylinder valves - Specification and type testing,
NEQ)
ISSUED ON: AUGUST 20, 2021
IMPLEMENTED ON: MARCH 01, 2022
Issued by: State Administration for Market Regulation;
National Standardization Administration.
Table of Contents
Foreword ... 4
1 Scope ... 8
2 Normative references ... 8
3 Terms and definitions ... 9
4 Basic type and structure ... 11
4.1 Basic types of valves ... 11
4.2 Main components of valve ... 12
5 Technical requirements ... 15
5.1 Material requirements ... 15
5.2 Design and process requirements ... 17
5.3 Performance requirements ... 18
6 Inspection and test methods ... 21
6.1 General principles for testing ... 21
6.2 Inspection of material mechanical properties and chemical composition ... 22
6.3 Oxygen aging resistance test ... 22
6.4 Low temperature resistance test ... 22
6.5 Inspection of connection dimensions ... 22
6.6 Pressure resistance test ... 23
6.7 Fire resistance test ... 23
6.8 Opening and closing test ... 23
6.9 Air tightness test ... 24
6.10 Vibration resistance test ... 25
6.11 Endurance test ... 25
6.12 Part integrity inspection ... 27
6.13 Mechanical impact resistance test ... 28
6.14 Oxygen pressure ignition resistance test ... 29
6.15 Valve part tightness test ... 32
6.16 Hydrochloric acid corrosion resistance test ... 33
6.17 Action test of safety pressure relief device ... 33
7 Inspection rules ... 34
7.1 Exit-factory inspection ... 34
7.2 Type test ... 35
8 Marking, packaging, transportation, storage ... 38
8.1 Marking... 38
8.2 Packaging, transportation, storage ... 39
9 Product certificate and product batch inspection quality certificate ... 39
9.1 Product certificate ... 39
9.2 Product batch inspection quality certificate ... 40
Appendix A (Normative) Residual pressure device ... 41
A.1 Type test ... 41
A.2 Inspection methods and judgment basis ... 42
General specifications of gas cylinder valves
1 Scope
This document stipulates the terms and definitions, basic types, technical requirements,
inspection and test methods, inspection rules, marking, packaging, transportation,
storage, product certificates, product batch inspection quality certificates of gas
cylinder valves.
This document is applicable to valves for compressed, liquefied, dissolved gas cylinders
(hereinafter referred to as valves), whose ambient temperature is -40 °C ~ +60 °C,
whose nominal working pressure is not greater than 35 MPa, which is transportable and
refillable.
This document does not apply to the valves for welding insulated cylinders, fire
extinguishing cylinders, vehicle cylinders, respirator cylinders, liquefied petroleum gas
cylinders, liquefied dimethyl ether cylinders, industrial non-refillable welded cylinders.
2 Normative references
The contents of the following documents constitute essential provisions of this
document through normative references in the text. Among them, for dated reference
documents, only the version corresponding to the date applies to this document; for
undated reference documents, the latest version (including all amendments) applies to
this document.
GB/T 197 General purpose metric screw threads - Tolerances
GB/T 228.1 Metallic materials - Tensile testing - Part 1: Method of test at room
temperature
GB/T 3863 Industrial oxygen
GB/T 4423 Copper and copper alloy cold-drawn rod and bar
GB/T 7307 Pipe threads with 55 degree thread angle where pressure-tight joints are
not made on the threads
GB/T 8335 Special thread for gas cylinders
GB/T 8337 Fusible plug device for gas cylinders
GB/T 13005 Terminology of gas cylinders
5.1.1.5 The liquid chlorine cylinder valve shall be made of materials resistant to
hydrochloric acid corrosion.
5.1.2 Valve body material
5.1.2.1 The valve body material shall be made of materials that will not change from
plasticity to brittleness (such as copper alloy, austenitic stainless steel, aluminum alloy,
nickel alloy, etc.), meanwhile it shall meet the design strength requirements of the valve
body. The performance of the material shall comply with corresponding national
standards.
5.1.2.2 When selecting brass material for the valve body, its copper content shall be in
the range of 57.0% ~ 65.0%, lead content shall be in the range of 0.8% ~ 1.9%, iron
content shall be ≤ 0.5%. The mechanical properties of the material shall not be lower
than those specified in GB/T 4423.
5.1.3 Operating mechanism and operating device materials
5.1.3.1 The valve operating device shall have sufficient strength and fire resistance,
which should be made of aluminum alloy material.
5.1.3.2 The materials of the valve stem, valve, connecting plate shall have sufficient
strength and corrosion resistance. The valve stem used for liquid chlorine medium shall
be made of stainless steel material, that is resistant to hydrochloric acid corrosion, or
materials with higher resistance to hydrochloric acid corrosion.
5.1.3.3 The spring placed inside the valve should be made of corrosion-resistant
stainless steel.
5.1.3.4 The diaphragm piece of the diaphragm valve shall be made of elastic stainless
steel material, or a combination of media corrosion-resistant material and elastic
stainless steel material.
5.1.4 Rubber seal materials
5.1.4.1 Oxygen aging resistance
The rubber seal shall be kept in oxygen at a pressure of (2.3 ± 0.2) MPa and a
temperature of (70 ± 5) °C for 96 hours; there shall be no visible cracks or aging.
5.1.4.2 Low temperature resistance
The rubber seal shall be kept in air at a temperature of (-40 ± 2) °C for 24 hours; there
shall have no cracks or other damage.
5.1.5 Non-metallic materials in contact with oxygen or strongly oxidizing gases
5.1.5.1 Non-metallic seals, lubricants, sealants and other materials that come into
contact with oxygen or strongly oxidizing gases shall be flame retardant.
5.1.5.2 Non-metallic seals, lubricants, sealants and other materials that come into
contact with oxygen or strongly oxidizing gases should be subjected to self-ignition
tests, according to the test methods specified in GB/T 31481. Their self-ignition
temperature shall be at least 100 °C higher than the maximum operating temperature.
Note: The maximum operating temperature refers to the highest temperature the valve may be
at during use (such as when inflated).
5.1.5.3 Non-metallic seals, lubricants, sealants and other materials that come into
contact with oxygen or strongly oxidizing gases shall be subjected to pressure impact
tests under pvt pressure, according to the test methods specified in GB/T 31481; it shall
not react with oxygen.
5.1.6 Materials of safety pressure relief devices
The material of the safety pressure relief device shall comply with the requirements of
GB/T 8337 or GB/T 16918.
5.2 Design and process requirements
5.2.1 The valve shall be able to operate normally within the ambient temperature range
of -40 °C ~ +60 °C. This temperature range can be appropriately expanded for a short
period of time (such as inflating). When the cylinder is used for a long time at a lower
or higher temperature, the supplier and the buyer shall sign an agreement and make it
clear in the supplier's instructions.