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Characteristics of double-sided submerged arc welded spiral pipe: the production process of straight welded pipe is simple, the production efficiency is high, the cost is low, and the development is fast. The strength of spiral welded pipe is generally higher than that of straight welded pipe. It can produce welded pipe with bigger diameter with narrower blank, and welded pipe with different diameter can also be produced with blank of the same width. However, compared with the straight seam pipe of the same length, the length of the weld increases by 30-100%, and the production speed is lower. Therefore, most of the smaller diameter welded pipes are welded by straight seam welding, while the larger diameter welded pipes are mostly welded by spiral welding.
Material editor
Commonly used spiral tube materials in China are: Q235A, Q235B, Q345, L245, L290, X42, X52, X60, X70, X80, 0Cr13, 1Cr17, 00Cr19Ni11, 1Cr18Ni9, 0Cr18Ni11Nb.
purpose
Double-sided submerged arc welding spiral steel pipe is mainly used in tap water engineering, petrochemical industry, chemical industry, electric power industry, agricultural irrigation, urban construction, is one of the 20 key products developed in China. For liquid transportation: water supply, drainage, sewage treatment engineering, mud transportation, marine water transportation. For gas transportation: gas, steam, liquefied petroleum gas. Structural function: Pile driving pipe, bridge, wharf, road, building structure pipe, ocean pile driving pipe, etc.
Use of National Standard Spiral Steel Tube Material
National Standard Spiral Steel Pipe, referred to as 9711.1 Spiral Steel Pipe, 9711.2 Spiral Steel Pipe, Material Classification: 16Mn Spiral Steel Pipe, Q345B Spiral Steel Pipe, L245 Spiral Steel Pipe, L360 Spiral Steel Pipe, X40-X80 Spiral Steel Pipe, Main Use, Spiral Steel Pipe for Sewage Treatment, Spiral Steel Pipe for Water Purification, Spiral Steel Pipe for Power Plant, Chemical Enterprise, Spiral Steel Pipe for Nuclear Power Plant, etc. Spiral steel pipe for conveying flammable fluid, spiral steel pipe for conveying non-flammable fluid, national standard spiral steel pipe and SY/T5037 spiral steel pipe of Ministry of Petroleum. The product is made of hot-rolled steel strip, which is usually spirally formed at normal temperature and welded by automatic submerged arc welding process. The product implements API SPEC 5L, EN10217, GB/T9711.1 and GB/T9711.2 standards. Mainly used for transportation of combustible and non-combustible fluids and steel structures in petroleum and natural gas industries.
