GB/T 17268-2020 in English
VALIDNon-refillable steel welded cylinders for industrial use
- Issued on:2020-12-14
- Implemented on:2021-07-01
- File Format:PDF
- Delivery:Via email within 5 business days
$418.00
《GB/T 17268-2020工业用非重复充装焊接钢瓶》由TC31（全国气瓶标准化技术委员会）归口，TC31SC2（全国气瓶标准化技术委员会焊接气瓶分会）执行，主管部门为国家标准化管理委员会。
Introduction
Analysis of the core content of the standard
| Technical indicators | 2009 version | Main changes in the 2020 version |
|---|---|---|
| Scope of application | Unspecified restrictions on Class A refrigerants | Limited to Class A low-pressure liquefied refrigerants defined in GB/T7778 |
| Material requirements | C≤0.15% | C≤0.12% and added Al≥0.020% requirement |
| Welding process | No automation requirements are specified | Mechanized/automatic welding is mandatory for the main welds |
Detailed explanation of key technical requirements
1. Material control
The bottle body material must be electric furnace/converter killed steel, and the chemical composition must meet the following requirements: C≤0.12%, Mn≤0.5%, P≤0.025%, S≤0.020%. Pay special attention to the newly added aluminum content requirement (Al≥0.020%) to improve welding performance.
2. Structural design
The steel cylinder adopts the upper and lower bottle body butt welding structure, and the design pressure is the larger value of the saturated vapor pressure of the medium at 60℃ and 2.3MPa. The head must meet the following requirements:
- Elliptical head: hi≥0.2Di
- Dish head: Ri≤Di and r≥0.15Di
Type test requirements
Burst test: 3 samples are taken, the burst pressure ≥2PT and the rupture must occur in the longitudinal position of the cylinder. New artificial aging treatment requirements (100℃×1h or 120℃×15min, etc.).
Drop test: No leakage after three drop postures at a height of 1.2m, and verified by the burst test.
Implementation suggestions
1. Material verification: Chemical composition analysis is required for each furnace number, using the GB/T223 series method
2. Welding control: Welders must be assessed according to TSGZ6001 and Appendix C, and the angular height of the girth weld is E≤1mm
3. Digital management: It is recommended to establish a cylinder QR code traceability system to store manufacturing, inspection and other full life cycle data
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