Type of pipe fittings?
Type of pipe fittings?
(OP)
I need to know the difference between "mechanical" and "flange" pipe fittings with regard to valves made in both cast iron and ductile iron? Would these require gaskets? Thanks.
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RE: Type of pipe fittings?
For cast iron flanges, there is class 25#, class 125#, class 250#. These are flat face type flanges, and come as threaded. BTW, these require a full face gasket.
If your bolting up cast or ductile iron valves to the ANSI class raised face flange, be very careful when torqueing the bolts down, normally what happens is the cast or ductile valve flange will crack or snap off if over torqued or the proper bolting tightening pattern is not followed, ruining the valve.
I hope this answers your question.
saxon
RE: Type of pipe fittings?
RE: Type of pipe fittings?
saxon