Pipe Nipple and Socket Features: 1) High quality 2) Thread ends conform to ASME B1.20.1 (NPT), DIN2999, BS 21, ISO 228/1, ISO 7/1 3) Nipples we also supply 　 　 Pipe Fittings ⊕Stainless Steel Pipe Fittings ⊕Malleable Iron Pipe Fittings ⊕ Butt Welding Fittings ⊕ Nipples and Sockets ⊕ Quick Couplings ⊕ Ductile Iron Grooved Fittings ⊕ Air Hose Couplings & Clamps Valves ⊕Stainless Steel Screwed Valves ⊕Cast (Ductile) Iron Valves ⊕Cast Steel Valves ⊕Forged Steel Valves ⊕Butterfly Valves ⊕Ball Valves ⊕Marine Valves Flanges Casting & Machining