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Quality Requirements of Anti-Corrosion Spiral Steel Pipe Groove

2019-09-18 09:44:13   COMMENT:0 HITS:
  In the inspection procedure of anticorrosive spiral steel pipe, there is a check called groove inspection. The groove of anticorrosive spiral steel pipe is an important part in the construction, installation and welding. The groove of anticorrosive spiral steel pipe conforming to the standard can make the later construction, installation and welding more efficient.

  Anti-corrosion spiral steel pipe groove is a common V-groove. What is V-groove?

  The so-called V-groove refers to the groove geometry formed after the butt assembly of two anti-corrosion spiral steel tubes is V-shaped. The groove angle of the anticorrosive spiral steel pipe should be 30-35 degrees. The groove of the anticorrosive ASTM A252 Sch40 SSAW Spiral Steel Pipe does not come down directly from a slope, and there are blunt edges at the innermost end of the groove.

  The requirement of the groove blunt edge of anti-corrosion spiral steel pipe is 1.6mm (+0.8mm). The commonly used tool for inspecting and measuring the groove angle and blunt edge of anti-corrosion spiral steel pipe is the weld seam inspection ruler, which is also called the angle ruler. It is a special measuring tool for measuring the groove angle of weldment, the width and height of weld seam and the welding gap.

  Anti-corrosion spiral steel pipe groove appearance should be smooth, burr-free, curling defects. For grooves that do not meet the requirements of the standard, it should be reworked and chamfered again. It is forbidden to use angle grinder to grind. The first part of anti-corrosion spiral steel pipe groove in each shift must be measured and recorded. In addition, the groove after replacing the knife head or adjusting the flat head machine equipment should also be measured carefully.

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