Spiral Welded Pipe

Spiral welded pipe: The low carbon carbon structural steel or low alloy structural steel strip is rolled into a tube blank according to a certain helix Angle (called forming Angle), and then the pipe seam is welded together, which can produce large diameter steel pipe with a narrower strip. The specification is expressed by the outer diameter * wall thickness, and the welded pipe should ensure that the water pressure test, the tensile strength of the weld and the cold bending performance should meet the requirements.

Raw material inspection -- leveling inspection -- butt welding inspection -- forming inspection -- internal welding inspection -- external welding inspection -- cut pipe inspection -- Ultrasonic inspection -- groove inspection -- outline dimension inspection -- X-ray inspection -- water pressure test -- final inspection

In order to ensure product quality, we have developed a sound quality plan, on-site work procedures and inspection and test plans.

The anticorrosion requirements of this project are quite different from those of other domestic projects. The main differences are as follows:

The internal anticorrosive material in China generally adopts cement mortar, and this project adopts non-toxic epoxy coating (thickness 0.4mm).

The EDM test voltage of the external anticorrosive coating is generally 3000 volts in China, the maximum is not more than 5000 volts, and the project is 10 kV.

Hot Tags: spiral welded pipe, China spiral welded pipe manufacturers, suppliers, factory, cold drawing seamless pipe, cast steel, seamless tubing, flow tank, nodular iron casting, straight weld pipe mill