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Socket & Threaded Fittings - MGH YAPI

Socket & Threaded Fittings

Comprehensive range of high-quality forged Socket-Weld and Threaded fittings designed for high-pressure, small-bore piping systems and general industrial applications.

Socket & Threaded Fittings

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Fitting Type / Application Sector	Key Characteristics & Typical Uses	Key Applicable Standards & Specifications
SOCKET-WELD FITTINGS (High-Pressure Small Bore Piping)	Size Range: 1/8" to 4" NPS (typically ≤ 2"). Features: Fillet weld connection, smooth bore, strong joint. Applications: Hydraulic systems, instrument lines, steam services, high-vibration areas.	Dimensions: ASME B16.11 (Forged Fittings, Socket-Weld & Threaded) MSS SP-79 (Socket-Weld Reducer Inserts) ISO 5251 (Stainless steel socket weld fittings) Materials: ASTM A105 (Carbon Steel) ASTM A182 (Stainless/Alloy)
THREADED FITTINGS (NPT) (General Service, Maintenance, Low/Moderate Pressure)	Size Range: 1/16" to 12" NPS. Thread Type: NPT (National Pipe Tapered). Applications: Utility lines, water systems, air lines, fuel oil, non-critical process.	Dimensions/Threads: ASME B1.20.1 (NPT Thread Standard) ASME B16.11 ISO 7-1 (Pipe threads where pressure-tight joints) Materials: ASTM A105 (CS) ASTM A182 F316/304 (SS)
ELBOWS (90°, 45°) (Direction Change)	Socket-Weld: Class 3000, 6000, 9000. Threaded: Class 2000, 3000, 6000. Materials: A105, A182, A350 LF2 (low temp). Key: SW for vibration; Threaded for disassembly.	Pressure Classes: ASME B16.11 (Class 2000-9000) MSS SP-97 (Integrally Reinforced Branch Outlets) Thread Standards: ASME B1.20.1 governs all NPT threads
TEES (STRAIGHT & REDUCING) (Branch Connections)	Socket-Weld: Full strength weld, ideal for small headers. Threaded: Reducing tees common for instrument taps. Materials: A105N, A182 F11, F316L.	Dimensions: ASME B16.11 Special: MSS SP-95 (Swage(d) Nipples - often threaded)
COUPLINGS & UNIONS (Pipe joining & disconnection points)	Full Coupling: Joins two pipes. Half Coupling: Branch connection. Union: Allows easy disassembly (Female-Female threads). Socket-Weld Unions: For higher pressure.	Dimensions: ASME B16.11 (Couplings) ASME B16.39 (Malleable Iron Threaded Unions) MSS SP-83 (3000 PSI Steel Unions)
BUSHINGS & PLUGS (Size reduction & closure)	Hex Head Bushing: Reduces fitting size (external/internal threads). Socket-Weld Reducer Inserts: For SW systems. Square Head & Hex Head Plugs: Pipe end closure.	Dimensions: ASME B16.11 MSS SP-79 (SW Reducer Inserts) Alternative: ASME B16.14 (Ferrous Pipe Plugs, Bushings)
CAPS (Pipe end closure)	Socket-Weld Caps: For permanent closure. Threaded Caps: For temporary/test closure. Materials: Match piping material.	Dimensions: ASME B16.11 ISO 4144 (Stainless steel threaded caps)
HYDRAULIC & INSTRUMENT FITTINGS (High-Precision Applications)	SAE O-Ring Boss Ports: Common in hydraulic systems. Swivel Nut Fittings: For gauge lines. Material: Often 316SS, with special finishes.	Standards: SAE J514 (Hydraulic Tube Fittings) ISO 8434 (Hydraulic connections) ANSI/ISA 75.8 (Face-to-face instrument valves)
HIGH-PRESSURE/TEMP ALLOY FITTINGS (Power Plants, Refining)	Socket-Weld Preferred over threaded for integrity. Materials: A182 F11, F22, F91 (Chrome-Moly). Class: 6000 or 9000 for high pressure.	Materials: ASTM A182 (Forged Alloy) ASTM A961 (Common Requirements for Forged Fittings) Design: ASME B31.1 (Power Piping - governs application)