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For ssaw steel pipe, we all know that the quality of the ssaw steel pipe is the most important thing for the quality of the whole spiral steel pipe, but the inspection of the geometric size of the spi...

The production control of the thick-walled spiral steel pipe is to increase the plastic toughness of the steel pipe, improve the cleanliness of the molten steel, reduce the harmful inclusions, and imp...

In the erection process of the pipeline, the direction is not fixed, we need to use some connecting devices to change the direction. So how does the direction of the ssaw steel pipe change? The elbow...

In the cross-section of the lsaw steel pipe, there is a phenomenon that the outer diameter is not equal, that is, there is a maximum outer diameter and a minimum outer diameter which are not necessari...

Fracture of lsaw steel pipe, mechanical properties of hydraulic (pneumatic) parts used in design, brittle fracture is also related to the use temperature of the component.   It has been found through ...

Transverse crack in the weld of thick-walled lsaw steel pipe D36, D36-Z35 and S355 structural steel plates with thickness of 20~50mm are used respectively to produce marine experience exchanges throug...

After the double-sided submerged arc welded pipe(dsaw pipe) is rusted, the surface of the steel is mainly polished by using a wire brush or the like, and the cleaning and preheating of the spiral pipe...

1. Definition of lsaw steel pipe pressure pipeline LSAW steel pipe pressure piping should include all straight seam steel pipe pipes that use pressure to deliver gas or liquid. From the point of view ...

1. Basic requirements for the appearance of lsaw welds Before the non-destructive testing of lsaw steel pipes, the inspection of the weld appearance shall meet the requirements. The general requiremen...

The bearing capacity of a lsaw steel pipe is related to two points. One point is the mechanical properties of the steel, which is related to the commonly stated yield point, tensile strength, elongati...