Socket Weld Reducer Insert
Socket Weld Reducer Insert Supplier & Manufacturer
A Socket Weld Reducer Insert is a forged pipe fitting used in socket weld piping systems to reduce pipe size from a larger diameter to a smaller bore. It is inserted into the socket of a larger fitting (like a coupling or tee) and provides a smaller socket for a smaller pipe.
It is commonly used in small-bore, high-pressure piping where smooth flow and leak-proof connections are critical.
| Attribute | Description |
|---|---|
| Product Name | Socket Weld Reducer Insert |
| Function | Connects two pipes of different diameters to reduce pipe size while maintaining flow in high-pressure piping systems. |
| Types | – Type 1: Per MSS SP-79, with a single socket to fit over a larger pipe and insert into a smaller pipe. – Type 2: Double socket design for specific applications. |
| Size Range | 1/8″ to 4″ (DN6 to DN100), with reductions typically between adjacent pipe sizes (e.g., 3/4″ to 1/2″, 1″ to 3/4″). |
| Pressure Rating | Class 3000, 6000, 9000 (suitable for high-pressure applications). |
| Standards | MSS SP-79, ASME B16.11, BS3799 |
| Materials | – Stainless Steel: ASTM A182 F304, F304L, F316, F316L, F310, F321, F347, F904L – Carbon Steel: ASTM A105, A350 LF2 – Alloy Steel: ASTM A182, A335, A234 (P1, P5, P9, P11, P22, P91) – Nickel Alloys: Inconel, Monel, Hastelloy (e.g., UNS 2200, 4400, 10276) – Duplex/Super Duplex Steel: ASTM A182 F51, F53, F55 – Copper Alloys: ASTM SB 111, SB 466 (C 70600, C 71500) – Others: Galvanized, Brass, Mild Steel, Titanium |
| Socket Weld Cross Section | Features a recessed socket for pipe insertion with a 1/16″ (1.6 mm) expansion gap to accommodate thermal expansion and prevent stress. |
| Applications | – Small-bore, high-pressure piping systems (e.g., oil and gas, chemical plants, power generation, fire sprinkler systems). – Conveying flammable, toxic, or expensive materials where leakage is critical. – Steam systems (300–600 PSI). |
| Connection Type | Socket Weld (fillet-type seal welds); typically connects a larger pipe to a smaller pipe. |
| Key Features | – High leakage integrity and structural strength. – Allows direct connection of different pipe sizes without additional fittings. – Simpler fit-up and no beveling required, reducing costs compared to butt-weld reducers. – Conforms to MSS SP-79 for precise dimensional control. – Not suitable for highly corrosive or radioactive applications due to potential corrosion in the expansion gap. |
| Dimensional Tolerances | – Socket Bore (B): Max/min dimensions per ASME B16.11 and MSS SP-79. – Bore Diameter (D): Max/min dimensions. – Socket Wall Thickness (C): Average thickness, with minimum at partial areas. – Center to Bottom of Socket (A): ±1.5 mm (NPS 1/2–3/4), ±2 mm (NPS 1–2), ±2.5 mm (NPS 2.5–4). – Depth of Socket (J): Minimum 9.5 mm. |
| Limitations | – Potential for stress due to thermal expansion in the socket gap. – Not suitable for hydrogen service or highly corrosive environments. – Limited to small-bore piping (NPS 2 or smaller). |
| Marking and Packaging | – Marked with alloy name, nominal pipe size, pressure class, and heat number. – Packaged in plastic bags, cartons, or seaworthy wooden cases/pallets to prevent damage during transportation. |
| Manufacturers/Suppliers | Available from suppliers like Marcel Piping, Skyland Metal, Kamlesh Metal, Teshi Group, and others, with exports to over 50 countries. |
Socket Weld Reducer Insert Dimensions
| Class 3000 | Class 6000 | Class 9000 | ||||||||||||
| Nominal Pipe Size | C | D | Fitting Type | A | B | E | Fitting Type | A | B | E | Fitting Type | A | B | E |
| 3/8 x 1/4 | 0.675 | 0.555 | 1 | 7/16 | 3/4 | 15/16 | 1 | 7/16 | 7/8 | 1 | ||||
| 1/2 x 3/8 | 0.850 | 0.690 | 1 | 7/16 | 13/16 | 1 1/16 | 1 | 7/16 | 15/16 | 1 3/16 | ||||
| 1/2 x 1/4 | 0.850 | 0.555 | 1 | 7/16 | 13/16 | 15/16 | 1 | 7/16 | 7/8 | 1 | ||||
| 3/4 x 1/2 | 1.060 | 0.855 | 1 | 7/16 | 7/8 | 1 5/16 | 1 | 7/16 | 1 1/16 | 1 3/8 | 1 | 7/16 | 1 3/16 | 1 3/4 |
| 3/4 x 3/8 | 1.060 | 0.690 | 2 | 7/16 | 5/8 | – | 1 | 7/16 | 7/8 | 1 3/16 | ||||
| 3/4 x 1/4 | 1.060 | 0.555 | 2 | 3/8 | 11/16 | – | 2 | 3/8 | 7/8 | – | ||||
| 1 x 3/4 | 1.325 | 1.065 | 1 | 9/16 | 15/16 | 1 1/2 | 1 | 9/16 | 1 1/8 | 1 11/16 | 1 | 9/16 | 1 1/4 | 2 |
| 1 x 1/2 | 1.325 | 0.855 | 2 | 1/2 | 5/8 | – | 1 | 7/16 | 1 1/8 | 1 3/8 | 1 | 7/16 | 1 1/8 | 1 3/4 |
| 1 x 3/8 | 1.325 | 0.690 | 2 | 7/16 | 11/16 | – | 2 | 1/2 | 7/8 | – | ||||
| 1 x 1/4 | 1.325 | 0.555 | 2 | 3/8 | 3/4 | – | 2 | 3/8 | 15/16 | – | ||||
| 1 1/4 x 1 | 1.670 | 1.330 | 1 | 9/16 | 1 | 1 7/8 | 1 | 9/16 | 1 3/16 | 2 | 1 | 9/16 | 1 3/8 | 2 3/8 |
| 1 1/4 x 3/4 | 1.670 | 1.065 | 2 | 9/16 | 11/16 | – | 2 | 9/16 | 13/16 | – | 1 | 9/16 | 1 3/16 | 2 |
| 1 1/4 x 1/2 | 1.670 | 0.855 | 2 | 1/2 | 3/4 | – | 2 | 1/2 | 7/8 | – | 2 | 1/2 | 7/8 | – |
| 1 1/4 x 3/8 | 1.670 | 0.690 | 2 | 7/16 | 13/16 | – | 2 | 7/16 | 15/16 | – | ||||
| 1 1/4 x 1/4 | 1.670 | 0.555 | 2 | 3/8 | 7/8 | – | 2 | 3/8 | 1 | – | ||||
| 1 1/2 x 1 1/4 | 1.910 | 1.675 | 1 | 9/16 | 1 1/8 | 2 1/4 | 1 | 9/16 | 1 3/8 | 2 3/8 | 1 | 9/16 | 1 5/8 | 2 3/4 |
| 1 1/2 x 1 | 1.910 | 1.330 | 2 | 5/8 | 11/16 | – | 1 | 9/16 | 1 3/16 | 2 | 1 | 9/16 | 1 3/8 | 2 3/8 |
| 1 1/2 x 3/4 | 1.910 | 1.065 | 2 | 9/16 | 3/4 | – | 2 | 9/16 | 1 | – | 2 | 9/16 | 1 | – |
| 1 1/2 x 1/2 | 1.910 | 0.855 | 2 | 1/2 | 13/16 | – | 2 | 1/2 | 1 1/16 | – | 2 | 9/16 | 1 | – |
| 1 1/2 x 3/8 | 1.910 | 0.690 | 2 | 7/16 | 7/8 | – | 2 | 7/16 | 1 1/8 | – | ||||
| 2 x 1 1/2 | 2.385 | 1.915 | 1 | 9/16 | 1 1/4 | 2 1/2 | 1 | 9/16 | 1 7/8 | 2 11/16 | 1 | 9/16 | 2 1/16 | 3 |
| 2 x 1 1/4 | 2.385 | 1.675 | 2 | 11/16 | 13/16 | – | 2 | 7/8 | 15/16 | – | 1 | 9/16 | 2 | 2 3/4 |
| 2 x 1 | 2.385 | 1.330 | 2 | 5/8 | 7/8 | – | 2 | 13/16 | 1 | – | 2 | 13/16 | 1 | – |
| 2 x 3/4 | 2.385 | 1.065 | 2 | 9/16 | 15/16 | – | 2 | 3/4 | 1 1/16 | – | 2 | 3/4 | 1 1/16 | – |
| 2 x 1/2 | 2.385 | 0.855 | 2 | 1/2 | 1 | – | 2 | 11/16 | 1 1/8 | – | 2 | 11/16 | 1 1/8 | – |
Advantages:
Reduces the need for separate reducer fittings
Allows easy pipe size transitions
Minimizes pressure drop
Compact and space-efficient
Ideal for high-pressure systems
Applications:
Chemical & Petrochemical plants
Oil & Gas processing
Power generation systems
Hydraulic and industrial piping
Marine piping systems