Knowledge

11Mar, 2025

Precautions for Chamfering
(1) Lamination and Inclusion: When processing the pipe ends, operators should carefully inspect the pipe ends for any lamination or inclusion. Steel pipes are not allowed to have l
11Mar, 2025

Role of Chamfering in the Production Process of Spiral Welded Pipes
After plasma flying cut of the double-sided submerged arc welded spiral seam pipe ends, defects such as uneven pipe ends, beveling cuts, slag inclusion, and length out of tolerance
10Mar, 2025

The purpose of repair welding
The purpose of repair welding is to perform welding operations on steel pipes with defective welds or those containing joint seams.
10Mar, 2025

The role of slag removal
The role of slag removal is to clear out the excess welding slag and flux from inside the pipe after the internal welding process. The method used involves lifting the spiral pipe
10Mar, 2025

The Purpose of Initial Pipe Cutting Inspection
Spiral-seam double-sided submerged arc welded pipes have relatively large diameters and wall thicknesses, and plasma cutting is currently the most commonly used method. To ensure t
10Mar, 2025

Parameters that need to be adjusted for both inner and outer welding
(1) Welding current (2) Welding voltage (3) Welding speed
10Mar, 2025

Production Process of Spiral Welded Pipe - The Role of Outer Weld
Outer welding refers to the welding performed on the outer surface of the steel pipe at a distance of one and a half or two and a half pitch lengths after the inner welding.
09Mar, 2025

Production Process of Spiral Welded Pipe - The Role of Inner Welding
Inner welding is performed by extending the welding arm into the interior of the steel pipe at a point lagging behind the steel strip's forming and meshing point. Both inner an
09Mar, 2025

Production Process of Spiral Welded Pipe - Forming Angle
The forming angle refers to the acute angle where the horizontal projection of the centerline of the steel pipe intersects with the centerline of the steel strip, commonly denoted
09Mar, 2025

Production Process of Spiral Welded Pipe - The Role of Forming
In the forming process, the steel strip of the required width, thickness, and material is rolled into a steel pipe of the desired specification according to the set forming process
09Mar, 2025

Production Process of Spiral Welded Pipe - The Role of Feeding
The steel strip passes through the gap between the lower and upper rolls of the feeder. The hydraulic cylinders, acting on both ends of the upper roll, exert force to generate suff
09Mar, 2025

Role of Edge Trimming in the Production Process of Spiral Welded Pipes
The steel strip is continuously sheared by a circular shear to achieve a uniform width. The steel strips used for spiral welded pipes are typically round-edged materials, which hav

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