Big diameter straight welded steel pipe generally refers to more than 500 mm diameter straight seam steel pipe, is now the biggest diameter 2020 mm, double seam weld maximum diameter is 1220 mm. Mouth straight seam steel pipe domestic general use of GB/T3091-2008, GB/T9711.1-1997, API 5 l standard. Big diameter straight seam steel pipe mainly double-sided LSAW steel pipe production technology, product by the bending, joint, welding, welding, straightening, flat head, such as multi-channel processes, to fulfill the requirements of relevant standards.
Big diameter straight seam steel pipe mainly double-sided submerged arc welding production technology, product by the bending, joint, welding, welding, straightening, flat head, such as multi-channel processes, to fulfill the requirements of relevant standards.
Big diameter straight seam carbon steel pipe is a large water conveyance pipeline engineering, gas engineering, the best choice of the urban pipeline construction, wide prospect of market.
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