This standard specifies the type, parameter, technical requirements, test method, inspection rules, marking, coating, packaging, transportation and storage of the seamless aluminum alloy gas cylinders (hereafter referred to as "the cylinder").
This standard is applicable to the design and manufacture of the portable cylinder: nominal operating pressure: 1~30 MPa; nominal capacity: 0.4~50 L; allowable temperature ≤ 60℃; capable of refilling permanent gas or liquefied gas chemically stable against aluminum alloy.
2 Normative References
The following standards contain provisions which, through reference in this standard, constitute provisions of this standard. At time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this standard are encouraged to investigate the possibility of applying the latest editions of the following standards.
GB/T 228-1987 Tensile Test Method for Metal
GB/T 230-1991 Metallic Materials—Rockwell Hardness Test
GB/T 231-1984 Metallic Materials—Brinell Hardness Test
GB/T 232-1999 Metallic Materials—Bend Test
GB/T 3191-1998 Extrusion Rods and Bars of Aluminium and Aluminium Alloy
GB/T 3246-1982 Aluminium and Aluminium Alloys—Products Inspection Method for Microscopic Structure
GB/T 3247-1982 Aluminum and Aluminum Alloys—Inspection Method of Microstructure for Wrought Products
GB/T 3880-1997 Aluminium and Aluminium Alloy Rolled Sheet
GB/T 4436-1995 Wrought Aluminium and Aluminium Alloy Tubes—Dimensions and Deviations
GB/T 4437-1984 Aluminium and Aluminium Alloy Extruded Tubes
GB/T 6519-1986 Process for Ultrasonic Inspection of Wrought Aluminum Alloy Products
GB/T 6893-1986 Aluminium and Aluminium Alloy Cold Drawn (Rolled) Tubing in Industrial Use
GB/T 6987.1~6987.24-1986 Methods for Chemical Analysis of Aluminium and Aluminium Alloys
GB 7144-1999 Colored Cylinder Mark for Gases
GB 8335-1998 Special Threads for Gas Cylinders
GB/T 9251-1997 Methods for Hydrostatic Test of Gas Cylinders
GB/T 9252-2001 Method for Cycling Test of Gas Cylinders
GB/T 12137-1989 Method for Leakage Test of Gas Cylinders
GB/T 13005-1991 Terminology of Gas Cylinders
GB/T 13440-1992 Method for Flattening Test of Seamless Gas Cylinders
GB 15385-1994 Method for Hydraulic Burst Test of Gas Cylinder
3 Terms and Symbols
3.1 Batch
The restricted quantity of cylinders which adopt the same design conditions, nominal diameter as well as design wall thickness and are manufactured with the ingot casting, extruded rod, sheet or pipe in the same furnace and by the same manufacturing method and has been heat treated under the same heat treatment specification.
See GB/T 13005 for other terms.
3.2 Symbols
Do outside diameter of cylinder, mm;
Di inside diameter of cylinder, mm;
D′ diameter of circular ring when pressed or tensed, mm;
S design wall thickness of the cylinder, mm
Sa the minimum wall thickness of the cylinder, mm;
Sao measured average wall thickness of cylindrical, mm;
Ph hydraulic test pressure, MPa;
GB/T 11640-2001 The following standards are cited：
