Flange: European flange and American flange
Pressure rating: PN 0.1 0.25 0.6 1.0 1.6 2.5 4.0 6.3 10.0 16.0 25.0 40.0 MPa European type flange (DIN)
Pressure Rating: PN 2.0 5.0 6.8 10.0 15.0 25.0 42.0 MPa American Flange (ANSI)
CL 150 300 400 600 900 1500 2500 Psi
It can be seen, whether it is a flange or tube, the two series or two systems can not be mixed.

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Slip On Flange generally only connected with the pipe, but can not be directly connected with the pipe fittings; Butt welding flange can be generally all welded pipe fittings (including elbow, tee, reducer, etc.) directly connected, of course, including pipeline.

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Steel Flange Production Process                      

Steel Flange workshop

Production Process