American Socket Weld Half-Coupling
- Threaded end: NPT or BSPT threaded connections are available.
- Standard: ASTM A105, ASTM A182, ASTM A350 LF2
- Clearance: 1.6mm
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American socket weld half-pipe fittings are mainly used for quick sealing connection of small diameter pipes (usually NPS≤2). It is a kind of pipe fittings with socket weld at one end and threaded or welded connection at the other end.
American Socket Weld Half-Coupling
- Conforms to ANSI B16.11 and supports Class 3000/6000/9000 pressure ratings for high pressure and high temperature piping systems.
- Designed for small diameter pipelines (NPS ≤ 2), socket weld end with Fillet Weld for high strength sealing and reduced risk of leakage.
- Low-temperature alloy steel (ASTM A350 LF2) withstands temperatures up to -46°C, preventing brittle failure at low temperatures.
- Class 3000 corresponds to SCH80 wall thickness (≤20 MPa), Class 6000 corresponds to SCH160 wall thickness (≤35 MPa), and Class 9000 corresponds to XXS Wall thickness (≥52 MPa).
- The welding process should control the interlayer temperature (e.g. stainless steel ≤150°C), and penetration testing (PT/MT) is recommended after welding to ensure the integrity of the seal.
- Allow 1.6mm thermal expansion gap at the weld end of the insert to avoid cracking of the weld due to thermal stress.
American Socket Weld Half-Coupling Dimension
