Flange Assembling
1. Before assembling the flange , the flange surface, it is nessary to clean the sealing surface. 2. When assembling flat welding flange, the end of the pipe should be inserted into 2/3 of the thickness of the inner diameter of the flange, and then the flange should be spot welded to the pipe. Check and correct the flange position from different directions so that the sealing surface is perpendicular to the center line of the pipe, and then spot weld the second point below it after it is correct. 3. Use a 90° angle ruler to check and correct the flange position from the left and right side, and then spot weld the third and fourth points after passing the test. 4. To the assembly of a pair of flanges, the bolt holes of the flange to be installed should be aligned with the corresponding bolt holes of the flange that has been fixed, and parallel to the flange that has been fixed, and the deviation should not be 1.5‰ bigger than the outer diameter of the flange, which not over...