ASME B16.15 pdf download Cast Copper Alloy Threaded Fittings Classes 125 and 250 6 THREADING 6.1 Types of Threads All pipe fittings shall be threaded with ANSI/ ASME B1.20.1 general purpose pipe threads and shall have taper threads, except wrought couplings (Tables 2 and I-2), wrought caps (Tables 3 and I-3), and wrought bushings (Tables 4 and I-4) in NPS...