... weld pipe fittings1. Specifications:Material: Carbon steel, Alloy steel, Stainless steelCarbon steel: ASTM A234 WPBAlloy steel: ASTM A234 WP11, ASTM A234 WP12 ... nuclear, electric power, boiler, heat exchanger, metallurgy, refinery, machinery, steel fabrication, shipbuilding, water disposal ,construction, aviation, textile, etc.3. ... to visit our factories and have business talk. welded steel BW reducer