What tools are used to align the pipe welding flange

The tube pad should be laid flat, the nozzle should be aligned with the flange neck, the gap should be found, and a spot should be welded. Based on this point, the short side of the straight copy square should be close to the sealing surface of the flange, and the long side should be close to the thickness of the flange. Use a tape measure to measure whether the distance between the two points on the long hundred sides and the center line of the pipe is equal. If they are equal, the spot corresponding to the spot has been welded to death. Using this point as a starting point, turn 90 ° along the circumference of the flange. Use the above method to find the alignment. Evenly point four points and the flange alignment ends.

How to find the alignment of the two flange eyes:

First lay the tube flat, use a spirit level to find the center line of the tube, and mark the tube ends at both ends. Use a square ruler to find the center line of the corresponding eye on the sealing surface of the high neck and flange and make the next mark. Pass the long side of the square rule through the flange hole, the long side is close to the inner wall of the flange hole, the short side is aligned with the mark, close the sealing surface, draw a point on the flange groove, and align the point with the pipe The mark on the port, the two flange eyes are correct on the pipeline.