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Butt-Weld Fittings & Solutions - MGH YAPI

Butt-Weld Fittings

Comprehensive range of industrial Butt-Weld Fittings designed to ensure reliable, leak-proof connections and optimal flow control in demanding piping systems.

Butt-Weld Fittings

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Fitting Type / Primary Application	Key Characteristics & Material Grades	Key Applicable Standards & Specifications
ELBOWS (90°, 45°, 180°) (Change direction of flow)	LR (Long Radius): R=1.5D. Standard for low turbulence. SR (Short Radius): R=1.0D. For tight spaces. 3D/5D Elbows: For high-pressure/special applications. Materials: ASTM A234 WPB (CS), WP5/WP9 (Alloy), WP316/304L (SS)	Dimensions/Tolerance: ASME B16.9 (Factory-Made Wrought Fittings) ISO 3419 (Non-alloy steel fittings) EN 10253 (Butt-welding fittings) Materials: ASTM A234 (CS & Alloy Steel Fittings)
TEES (STRAIGHT & REDUCING) (Branch connections, combine/divide flow)	Equal Tee: All run/branch same size. Reducing Tee: Branch smaller than run. Barred Tee: For pipeline pigging (internal bar). Materials: A234 WPB, WPHY-52, WP316, WP22	Dimensions/Tolerance: ASME B16.9 ISO 3419 MSS SP-43 (Light-wall Stainless) Special: API 6D/ISO 17292 (Barred tees for piggable systems)
REDUCERS (CONCENTRIC & ECCENTRIC) (Pipe size change)	Concentric: Centerline alignment. For vertical lines. Eccentric: One flat side. For horizontal lines (avoid air traps). Materials: A234 WPB, WPHY-65, WP304	Dimensions/Tolerance: ASME B16.9 ISO 3419 EN 10253-2 (Fittings for pressure purposes)
CAPS (Pipe end termination)	Hemispherical: For high pressure/vessels. Ellipsoidal: Standard for piping. Flat: Non-standard, low pressure. Materials: A234 WPB, WP5, WP316L	Dimensions/Tolerance: ASME B16.9 ISO 3419 ASME B16.11 (Forged Fittings - some caps)
LATERAL (45°/90°) (45° or 90° branch connection)	True Lateral: 45° branch from main run. Y-Type: Lower pressure drop. Materials: A234 WPB, WPHY-42, WP9	Dimensions/Tolerance: ASME B16.9 (Primary standard) MSS SP-75 (High-test fittings)
STUB ENDS / LAP JOINT STUBS (Used with lap joint flange for easy assembly)	Type A/B/C: Different bevel/length specifications. Materials: Must match/overmatch pipe grade. Common: A403 WP316, A815 UNS S31803 (Duplex)	Dimensions/Tolerance: ASME B16.9 ISO 5251 (Stainless steel stub ends) Materials: ASTM A403 (Stainless steel fittings)
HIGH-PRESSURE/SPECIAL SERVICE (Power plants, oil & gas transmission)	Extruded Headers/Outlets: Reinforced branch connections. Forged Fittings: Superior mechanical properties. Materials: A860 WPHY-70, A182 F91, A815 S32750 (Super Duplex)	Dimensions: MSS SP-75 (Specification for high-test fittings) ASME B16.49 (Factory-made induction bends) Materials: ASTM A860 (High-strength CS fittings)
STAINLESS STEEL & DUPLEX (Corrosive services, offshore, chemical)	Construction: Seamless/Welded construction. Grades: 304/L, 316/L, 321, 347, 904L. Duplex/Super Duplex: S31803, S32750, S32760. Finish: Electropolished for high purity.	Dimensions/Tolerance: ASME B16.9 ISO 1127 (Stainless steel pipe dims) Materials: ASTM A403 (Wrought SS fittings) ASTM A815 (Duplex/Super Duplex fittings)