What Do I Need To Pay Attention To The Application Of Spiral Welded Steel Pipe?

The installation and application of spiral welded steel pipe has strict technical requirements, which should be carried out in accordance with the specific situation, and should ensure the quality in accordance with the operating procedures. This type of steel pipe in the usual application need to pay attention to the following aspects:

1, the installation of steel pipe according to the design of the drawings, according to the site conditions prefabricated pipe bracket, followed by punching and site according to the design, followed by polishing machine polishing groove, followed by welding. Application quality requirements riser vertical installation error should be less than 3mm / m, horizontal installation error should be less than 1mm. branch pipe should not be welded at the weld seam, and should avoid welding at the elbow.

2, spiral welded steel pipe before the application of construction preparation. Should dig out the pipeline trench, the construction of pipeline wells, need a variety of steel pipe, and need a variety of tools, including welding machine, cutting machine, electric hammer, polishing machine and so on. To do a good job of adequate preparation before starting the installation.

3、About the mechanical damage on the surface, the sleeve is usually applied to repair it. Sleeve consists of two parts, two longitudinal welds made of two slats, welding method selected Nobel welding method. The advantage is that there are no welds on the body of the pipe. The longitudinal seam is a butt weld with a liner, and the pipe body itself becomes the upper and lower liner. Whichever method is chosen, the casing must be clamped tightly to the steel pipe.

4, the weld is straight, the weld is complete, and the surface of the spiral welded steel pipe weld is not burned through or cracked. When the scratches do not form leaks, there is no need to weld two round fillet welds between the casing and the steel pipe body. If there is a leak, a weld is required. At this point, the sleeve is, in fact, taking on the internal pressure created by the fluid. Consequently, the thickness of the sleeve is usually not less than the thickness of the pipe wall in such a condition.