November 27, 2023
The carbon steel welded pipes produced by these three processes have their own positioning in the application field because of their different raw materials, forming processes, caliber size and quality.
1. Straight seam electric resistance welded pipe (ERW)
Electric resistance welded pipe is the earliest type of steel pipe produced in my country, with the widest range of applications, the largest number of production units (more than 2,000), and the highest output (accounting for about 80% of the total production capacity of welded pipes). The product specification is Ф20~610mm. played an important role. Since the 1980s, about 30 sets of ERW219-610mm units have been imported from abroad. After years of production practice, the equipment technology level has made great progress, and the product quality is also constantly improving. Because of its low investment, quick effect and wide application range, it has developed rapidly.
2. Spiral submerged arc welded pipe (SSAW)
The equipment investment of spiral submerged arc welded pipe is less, because the use of low-cost narrow strip (plate) coil continuous welding to produce large-diameter (Ф1016~3200mm) welded pipe, the production process is simple, the operating cost is low, and it has the advantage of low-cost operation. my country’s oil and gas transmission spiral welded pipe has formed a basic format mainly based on the steel pipe factory affiliated to the petroleum system.
3. Straight seam submerged arc welded pipe (LSAW)Longitudinal submerged arc welding is an advanced pipe-making technology developed late in my country, and UOE technology was mainly used in the past.
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