ANSI WELDING NECK FLANGE 1-standards:ASTM,BN API,etc 2-material:carbon steel, alloy steel,etc 3-a large stock -a big manufacturer of steel pipe and pipe fitttingsKey Specifications/Special Features:1>Types: welding neck, slip-on, threaded, lap-joint, socket welding and blind2>Manufacturing standards: API, ANSI, BS, JIS, UNI, MSS and SP3>Size range: from 1/2-inch to 56-inch (DN 15 to DN 1,400mm)4> ...