... fittings1. Specifications:Material: Carbon steel, Alloy steel, Stainless steelCarbon steel: ASTM A234 WPBAlloy steel: ASTM A234 WP11, ASTM A234 ... electric power, boiler, heat exchanger, metallurgy, refinery, machinery, steel fabrication, shipbuilding, water disposal ,construction, aviation, textile, etc.3. ... products to many countries.5. We can provide steel butt weld pipe fittings such as elbow, tee ...