In the production of H. F. butt spiral welded pipe, the vertical roll extruding installation with fixed position are changed into horizontal roll installation with fixed pressure.
High-quality spiral welded pipe can not do without high-quality steel, quality carbon structural steel plate introduced starting with high-quality start.
Having been practiced for several years, a new butt method for spiral welded pipe, the two spots tack-weld butt was made out.
It realized digital of nondestructive testing for spiral welded pipe.
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