ASME B16.9 pdf download FACTORY-PA ADE WROUGHT BUTTWELDINC FITTINGS 1 scOPE1.1 General This Standard covers overall dimensions，tolerances,ratings,testing, and markings for wrought factory-madebuttwelding fittings in sizes NPs through 48 (DN15 through 1200). 1.2 Special Fittings Fittings may be made to special dimensions，sizes,shapes, and tolerances by agreement between the manu-facturer and the purchaser. 1.3 Fabricated Fittings Fabricated laterals and other fittings employing...