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　　The quality of spiral steel pipe is the most concerned issue for purchasers. Its quality is mainly composed of its own material, standard, wall thickness, weld and other factors. Under the same material and standard conditions, the quality of spiral steel pipe is mainly measured by wall thickness and weld quality. As the spiral steel pipe users are very extensive, we usually see the bracket, water pipeline and other projects, but once the quality of spiral steel pipe problems, these projects will be affected, more serious directly affect human safety. At present, the wall thickness of spiral steel pipe in the market is usually lower than lower, so the lower range is better than lower quality, and the pressure bearing capacity is stronger. The quality of weld mainly depends on the eyes or through flaw detection. The seam without sand holes and uniform weld belongs to high-quality products.

　　ASTM A252 X 52 Spiral Steel Pipe is a kind of spiral steel pipe which is formed by spiral bending of strip or coil plate and welded by double-sided submerged arc automatic welding for inner and outer seams. For the following reasons, Spiral steel pipe can be widely used in water, electricity, chemical industry and other industries.

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