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Submerged arc welded pipes with some features

Views: 0     Author: Site Editor     Publish Time: 2021-04-12      Origin: Site

What is the definition of submerged arc welded steel pipe?

The submerged arc straight seam steel pipe body has a longitudinal weld, and when the diameter is greater than 914mm, two welds are allowed. The wire submerged arc filler welding is used. The submerged arc longitudinal seam steel is abbreviated as ASWL, which is a flux-protected weld; submerged arc The biggest feature of the straight seam steel pipe is the use of external welding wire for arc heat melting and the use of submerged arc flux.

What is the difference between the production process of high frequency straight steel pipe and submerged arc steel pipe?the welded steel pipe for natural gas transportation - GKSTEELPIPE

The production differences between high-frequency straight seam steel pipe and submerged arc straight seam steel pipe mainly include different raw materials, different forming processes, different welding processes, different production units, and different production ranges. The submerged arc straight seam steel pipe is the narrowest 1250mm coiled plate, medium plate and medium thick plate are the raw materials for production. High-frequency straight seam steel pipes use strip steel with a maximum width of 1500mm as the raw material for production. Strip steel is lower in cost.

The forming process of the submerged arc straight seam steel pipe is JCOE cold stamping forming, which is characterized by gradually forming the steel plate in units of 50mm. The image of J, C, O, E represents the forming process of the submerged arc straight seam steel pipe. The high-frequency straight seam steel pipe forming process is a cold forming process in which the two ends of the strip are squeezed by multiple rollers, and finally the two ends of the strip are aligned. It is characterized by uninterrupted forming process and continuous welding.

The submerged arc welding process is characterized by using the electric heating effect of the welding wire to fuse the steel plate together, which is the filler welding. The high-frequency straight seam steel pipe welding process is characterized by the use of the high-frequency skin effect of the current to make the two ends of the strip heat up rapidly in a short time, and the strip steel is self-melted under the action of external force.

The high-frequency straight steel pipe production unit is an uninterrupted production line with the same effect, while the submerged arc welded straight seam steel pipe has a complete set of intermittent production units with as many as 15 processes. The production specifications of high-frequency straight seam steel pipes are less, and the production thickness is thinner. The submerged arc straight seam steel pipe can be produced in any specification from 325 to 1600mm and any thickness within the maximum thickness of 80mm.


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