Method and apparatus for producing continuous lengths of coilable tubing

摘要: A system for making a long length of seam-welded tubing from shorter lengths flat metal strip which are spliced end-to-end and formed into tubular form seam-welded. Adjoining ends two successive the trimmed at supplementary angles, one is an acute angle. The abutted welded, preferably with weldment extending beyond each such end. All surfaces weld finished to match dimensions strip. tubing, along welded joints, heat treated as produce product substantially free internal surface roughness splice welds.