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　　One of the requirements of spiral steel pipe welding is to have compactness, so that accidents can not occur when using spiral steel pipe. In the production of ASTM A53 Gr.B 1000mm Diamete Spiral Steel Pipe, some conditions will be encountered, such as gas holes. When the welded spiral steel pipe are manufactured, gas holes will appear in the welds. If there are gas holes in the welds when the welded spiral steel pipe are in use, it will affect the compactness of the welded spiral steel pipe and cause serious losses due to leakage of the pipes. In addition, when the welded spiral steel pipe is used, it will also cause corrosion because of the gas holes in the weld, which will reduce the service time of the welded pipe.

　　The common reasons for the occurrence of gas holes in the weld of spiral steel pipe .There is water in the flux, or some dirty things, etc. When spiral steel pipe is welded, these things will cause gas holes in the welded spiral steel pipe. When welding, select the appropriate flux composition, large diameter spiral steel pipe thick wall spiral steel pipe is exquisite workmanship, reaction occurs during welding, spiral steel pipe will not appear holes during welding.

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