API 600 pdf download

API 600 pdf download Steel Gate Valves—Flanged and Butt-welding Ends, Bolted Bonnets 5.9.2 The nominal depth of the packing box shall accommodate a minimum of five uncompressed rings of packing.Unless otherwise specified by the purchaser, the packing box surface area in contact with the packing material shallhave a surface finish, Ra, of 175 uin. (4.5 um) or smoother. 5.9.3 The...