4, GB/T21835-2008 welded steel pipe size and unit length weight.
The expansion information:
The welded connection 1, galvanized steel pipe mouth is not in a straight line and steel pipe existence. After intercepting a short period, processing is processed. 2. After the docking of galvanized steel pipe ports, the docking of two pipe ports is not strict, resulting in the uneven thickness of the welding port; and the steel pipe due to its own or transportation, which causes the pipe mouth oval. It is recommended to cut off the steel pipe header one by one Small sections are processed. 3, after the docking of galvanized steel pipe mouth, sand eye appears: 4, caused by technical reasons during welding. Reference materials Source: Baidu Encyclopedia-Galvanized steel pipe
The current national standard:
1, the national standard and size standard of galvanized pipes;
2, GB/T3091-2015 low-voltage fluid transportation steel pipe;
3, GB/GB/ T13793-2008 straight seam welding steel pipe;
4, GB/T21835-2008 welded steel pipe size and unit length weight.
The expansion information:
The welded connection
1, galvanized steel pipe mouth is not in a straight line and steel pipe existence. After intercepting a short period, processing is processed.
2. After the docking of galvanized steel pipe ports, the docking of two pipe ports is not strict, resulting in the uneven thickness of the welding port; and the steel pipe due to its own or transportation, which causes the pipe mouth oval. It is recommended to cut off the steel pipe header one by one Small sections are processed.
3, after the docking of galvanized steel pipe mouth, sand eye appears:
4, caused by technical reasons during welding.
Reference materials Source: Baidu Encyclopedia-Galvanized steel pipe