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ERW is-high-frequency resistance welding-straight seam welded pipe; LSAW is-submerged arc welding-straight seam welded pipe; both belong to straight seam welded pipe, but the two have different weldin...

Black steel pipe is uncoated steel, also known as black steel. The dark color comes from the iron oxide formed on its surface during the manufacturing process. When a steel pipe is forged, a black oxi...

Welding process of oil casing pipe (1) Selection of welding method: 80%Ar+20%CO2 gas shielded welding. Selection of welding data: ER55-G welding wire is used, with a diameter of 3.2mm. Welding paramet...

Inspection of geometric dimensions and shape of steel pipes: 1. Steel pipe wall thickness inspection: micrometer, ultrasonic thickness gauge, no less than 8 points on both ends and record. 2. Inspec...

What are the specific contents of seamless steel pipe acceptance? Inspection of geometric dimensions and shape of steel pipes: ①Wall thickness inspection of steel pipe: micrometer, ultrasonic thic...

In order to maintain the heating temperature of the petroleum casing pipe during rapid heat treatment, the heating temperature is evenly distributed along the longitudinal direction of the steel to ob...