This standard specifies the type, materials, design, construction, test methods, inspection rules, marking, packing, storage, service life, etc. of liquefied petroleum gas cylinders.
This standard is applicable to welded steel gas cylinders (hereinafter referred to as "cylinders") which are used under normal environment temperature (-40℃~60℃), have 2.1MPa nominal working pressure and no larger than 150L nominal volume, and can repeatedly contain liquefied petroleum gas (in accordance with GB 11174).
2 Normative References
The following standards contain provisions which, through reference in this text, constitute provisions of this standard. For dated reference, subsequent amendments to (excluding correction to), or revisions of, any of these publications do not apply. However, all parties coming to an agreement according to this standard are encouraged to study whether the latest edition of these documents is applicable. For undated references, the latest edition of the normative document is applicable to this standard.
GB/T 222 "Permissible Tolerances for Chemical Composition of Steel Products"
GB/T 228 "Metallic Materials-Tensile Testing at Ambient Temperature" (GB/T 228-2002, eqv ISO 6892:1998)
GB/T 1804 "General Tolerances-Tolerances for Linear and Angular Dimensions without Individual Tolerance Indications" (GB/T 1804-2000, eqv ISO 276-1:1989)
GB/T 2651 "Tensile Test Method on Welded Joints"
GB/T 2653 "Methods of Bend and Compression Tests for Welded Joint"(GB/T 2653-1989, neq ISO 5173:1981)
GB 6653 "Steel Plates for Pressure Vessels"
GB 7144 "Coloured Cylinder Mark for Gases"
GB 7512 "Valves for Liquefied Petroleum Gas Cylinders"
GB 8335 "Special Threads for Gas Cylinders"
GB/T 9251 "Method for Hydraulic Test of Gas Cylinders"
GB 11174 "Liquefied Petroleum Gases"
GB/T 12137 "Method for Leakage Test of Gas Cylinders"
GB/T 13005 "Terminology of Gas Cylinders"
GB 15385 "Method for Hydraulic Burst Test of Gas Cylinders"
GB 17925 "Standard Practice for X-ray Real-time Examination of Cylinders Weld"
CJ/T 32 "Welding Procedure Qualification of Liquefied Petroleum Gas Cylinders"
CJ/T 33 "Technological Process Evaluation of Heat Treatment for LPG Cylinders"
CJ/T 34 "Coating Specification for Liquefied Petroleum Gas Cylinders"
CJ/T 35 "Rules for Packaging and Transportation of Liquefied Petroleum Gas Cylinders"
JB 4730 "Nondestructive Testing of Pressure Vessels"
Safety Inspection Regulations for Gas Cylinders
3 Terms and Definitions
For the purposes of this standard, the following terms and definitions and ones established in GB/T 13005 apply.
3.1
Maximum filling weight
Product of filling factor of liquefied petroleum gas and nominal volume of cylinder specified in "Safety Inspection Regulations for Gas Cylinders".
3.2
Assure value of mechanical properties after heat treatment
Minimum value (shall not be less than 93% of lower limit of standard specified value) assured for mechanical properties of cylinder base material after annealing heat treatment.
3.3
Small capacity cylinders
Cylinder with nominal volume less than or equal to 12L.
