... , 40,64,100,160 ETC. Available with NACE MR 01-75 material stainless steel , carbon steel , nickel alloy ,cast iron , ... to pipe wall thickness effected by the taper is extremely beneficial under conditions of repeated bending, caused by line expansion or ... between pipes, which, in practice, is the same as that of unwelded pipe. Thus this type of flange is preferred for every severe service condition ...