Welding of Steel Plate for Gas Cylinder (GB6653-1994)
Welding of steel plate for gas cylinders (GB6653-1994) is a welding technology required by safety-related state regulations and related national standards. Steel plate welding is essential in the processing and production of gas cylinders. The implementation of relevant standards is of great significance to the safety and quality assurance of the manufactured products.
The national standard GB6653-1994 Steel Plate for Gas Cylinder provides for the welding of steel plates for gas cylinders. The standard stipulates that the welding material used for steel plates for gas cylinders must be in accordance with GB/T9131-2008. The standard requires that the welding of steel plates for gas cylinders must be carried out in accordance with the welding process and technical conditions contained in the process document.
This standard requires that the welded steel plates for gas cylinders should be vacuum degassed, semi-killed or killed steel grades. Before welding, according to GB/T3116-1991, the surface oxide scale layer of the steel plate should be removed, and the surface of the steel plate should be cleaned. For the welding of steel plate for gas cylinders, preheating is required before welding. The preheating process should keep the temperature of the welding area consistent and evenly heated, and the preheating temperature should be controlled at 400-450℃.
For the welding of steel plates for gas cylinders, the welding process should meet the technical requirements of GB/T11989-2008 and welding operation specifications in GB/T1503. The maximum interpass temperature should not exceed 250℃. In the finished weld, the total length of the weld defect should not exceed 3.2mm. The welded joint of the steel plate for gas cylinders should be inspected with an X-ray test, and the radiation indication should not exceed the level allowed by the standard.
After welding, the steel plate for the gas cylinder should be subjected to a post-weld heat treatment process. The post-weld heat treatment process should comply with the requirements of GB/T6653-1994. After post-weld heat treatment, an impact test should be performed on the weld metal and the heat-affected zone of the steel plate according to GB/T5117-2008. The sample shall conform to the ISO148-1 standard for Charpy impact test requirements.
The welding of steel plates for gas cylinders is a welding technology related to safety and requires the implementation of national standards and regulations. The welding of steel plates for gas cylinders must comply with the relevant welding process and technical requirements. During the welding process, attention should be paid to controlling the preheating temperature, avoiding exceeding the maximum interpass temperature, and confirming whether the total length of the weld defect is within the scope of the allowable concentricity. Finally, after welding, an impact test should be carried out on the weld metal and heat affected zone and then post-weld heat treatment should be conducted.
Steel plate welding must be strictly controlled to ensure the quality and safety of gas cylinders. In the welding process, experienced and trained welders, welding operators, and welding inspectors should all be employed and their welding works must conform to national standards. The welding of steel plates for gas cylinders should always be done in accordance with the process conditions and technical requirements of national standards.
