Specification: Ward Class 150 Malleable Iron Fittings are made with themost sophisticated metallurgical and processing controls available.Iron samples are continuously analyzed using spectroscopyto conform the material quality. This sophisticated chemicalanalysis is complemented by rigorous quality control of incomingraw materials and iron processing. The final casting produced bythis detailed attention to quality is a close-grained, high strength,non-porous iron.Quality iron is the starting point for Ward fittings. From this iron,accurate threads are machined that comply with the precisestandards developed by the Amerian Society of MechanicalEngineers (ASME) and published as an American NationalStandard. The threads have an accurate form, thread length andstraightness to allow them to easily engage threaded pipe. Inaddition, Ward fittings have a chamfered opening to allow fasterand easier pipe engagement. This feature also protects the fittingthreads from damage during handling.All Ward black & galvanized Class 150 Malleable Iron Fittingshaving outlets ranging from 1/2 through 4 are air tested at 80psig. This test is part of a constant program to maintain thehighest quality fittings available.