SPIRAL PIPE JOINTS ALLOW HAVE IT?

1, the contract provisions will generally spiral steel pipe butt weld indicate whether to allow the customer allows it is entirely possible.
2, spiral steel pipe is a strip coil as raw material, often warm extrusion molding, automatic double wire-sided submerged arc welding process welded spiral seam steel pipe. Spiral steel pipe into the steel unit, multi-channel roll rolling strip gradually rolled up, a gap is formed with an opening round tube, squeeze rollers reduction adjustment, the weld gap control at 1 ~ 3mm, and the weld ends flush.
3, commonly used spiral steel pipe standards are generally divided into: SY / T5037-2008 (Ministry of standard, also known as ordinary fluid pipes with spiral submerged arc welded pipe), GB / T9711.1-2008 (GB, also known as the oil and gas industry the first portion of the delivery pipe technical delivery conditions: a steel grade (demanding a GB / T9711.2 B grade steel)), API-5L (American petroleum Institute, also known as line pipe; which is divided into two levels PSL1 and PSL2 ), SY / T5040-2008 (pile with spiral welded steel pipe).