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Spiral Steel Pipe Installation And Precautions

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1. Construction preparation
(1) Operating conditions: The floor of the pipeline trench is completed; the brickwork of the pipeline well is completed.
(2) Material requirements: Complete pipelines of various specifications and models.
(3) Main machines and tools: cutting machine, polishing machine, electric welding machine, electric hammer, etc.

2. Quality requirements
The allowable deviation of vertically installed spiral steel pipe risers is 3mm per meter, and the allowable deviation is no more than 8mm when it is over 5m. The allowable deviation of horizontally installed pipes is 1mm per meter.

3. Pipeline installation
①Pipeline installation: Cut materials according to the design and on-site, and then use a polisher to make a bevel with an angle of 60°~65°. Fix the processed pipe on the bracket, the gap between the two pipes is 1.5mm~2.5mm and then weld. There should be no bends in the welding joints, and there should be no misalignment during assembly. Electric welding positioning is generally 4 spot welds. After inspection and straightening, welding should be carried out using free conversion methods as much as possible.
② Pipe bracket production and installation: According to the drawing design, the pipeline is positioned, and the pipe bracket is prefabricated according to the site conditions. Hang the wire down from the 25th floor and fix the bracket.

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