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ABOUT FLANGES  

For recommended bolt tightening sequence for flanges, Click Here.

NOTE: Tap end studs and stud bolts shown above have lengths to accommodate joining 30" 600 MSS full bore flanges with flange thickness as shown. 30" 600 MSS blind flanges have a flange thickness of 6". To join a 30" 600 MSS blind flange to a full bore flange, use studs with lengths as follows.

Tap End Studs: 11-1/2" long.

Stud Bolts: 16-3/4" long.

Manufacturers have chosen to make 30" nominal diverters in 500 and 1000 psi working pressure ratings, but have chosen existing MSS flanges rather than proposing new flanges.