Socket Weld Coupling
Socket Weld Cross Manufacturer & Supplier
A Socket Weld Cross is a forged pipe fitting used to connect four pipes at right angles to each other. It features four socket connections in a cross-shaped design, allowing the distribution or collection of fluid from a central point. This fitting is commonly used in high-pressure piping systems for sizes up to 2 inches.
| Attribute | Description |
|---|---|
| Product Name | Socket Weld Cross (Forged Socket Weld Equal or Reducing Cross) |
| Function | Connects four pipes to form three 90-degree branches from the main pipeline. Can have one inlet and three outlets or vice versa. |
| Types | – Equal Cross Tee: Connects four pipes of the same diameter. – Reducing Cross Tee: Connects pipes of different diameters. |
| Size Range | 1/8″ to 4″ (DN6 to DN100) |
| Pressure Rating | Class 3000, 6000, 9000 (suitable for high-pressure applications). |
| Standards | ASME B16.11, GB/T 14383, 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 | Designed to accommodate various pipe sizes with a recessed area for pipe insertion. Requires a 1/16″ (1.6 mm) expansion gap between pipe and socket shoulder to prevent thermal expansion stress. |
| Applications | – Small-bore, low-pressure piping systems (e.g., fire sprinkler systems, chemical plants, gas plants, automobiles). – Conveying flammable, toxic, or expensive materials where leakage is unacceptable. – Steam systems (300–600 PSI). |
| Connection Type | Socket Weld (fillet-type seal welds); can also have mixed connections (e.g., socket weld and threaded). |
| Key Features | – High leakage integrity and structural strength. – Suitable for permanent pipework with good flow characteristics. – Lower construction costs compared to butt-welded joints due to simpler fit-up and no need for beveling. – Not suitable for highly corrosive or radioactive applications due to potential corrosion in the expansion gap. |
| Dimensional Tolerances | – Socket Bore (B): Max/min dimensions as per ASME B16.11. – 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). |
| Limitations | – Less stable than tees due to four connection points (behaves like a four-legged stool). – Potential for stress due to thermal expansion. – Not commonly used in plumbing; more common in fire sprinkler systems. – Not suitable for hydrogen service or highly corrosive environments. |
| Marking and Packaging | – Marked with alloy name, outside diameter, wall thickness, and heat number. – Packaged in plastic bags, cartons, or seaworthy wooden cases/pallets to prevent damage during transportation. |
| Manufacturers/Suppliers | Available globally from suppliers like Teshi Group, Skyland Metal, Marcel Piping, Kamlesh Metal, Excel Metal, and others, with exports to over 50 countries. |
Socket Weld Cross Dimensions Class 3000, 6000, and 9000
| NPS | DN | Class | Socket Bore (B) Max / Min | Bore Diameter (D) Max / Min | Socket Wall Thickness (C) Average | Center to Bottom of Socket (A) | Laying Length (E) | Laying Length (F) |
|---|---|---|---|---|---|---|---|---|
| 1/8 | 6 | 3000 | 11.2 / 10.8 | 7.6 / 6.1 | 3.1 | 11.0 | 6.0 | 6.0 |
| 1/4 | 8 | 3000 | 14.6 / 14.1 | 10.0 / 8.5 | 3.3 | 11.0 | 6.0 | 6.0 |
| 3/8 | 10 | 3000 | 18.0 / 17.5 | 13.3 / 11.8 | 3.5 | 13.5 | 6.0 | 6.0 |
| 1/2 | 15 | 3000 | 22.2 / 21.7 | 16.6 / 15.0 | 4.1 | 15.5 | 8.0 | 8.0 |
| 3/4 | 20 | 3000 | 27.6 / 27.1 | 21.7 / 20.2 | 4.3 | 19.0 | 8.0 | 8.0 |
| 1 | 25 | 3000 | 34.3 / 33.8 | 27.4 / 25.9 | 4.9 | 22.0 | 9.5 | 9.5 |
| 1-1/4 | 32 | 3000 | 43.1 / 42.6 | 36.0 / 34.4 | 5.3 | 27.0 | 9.5 | 9.5 |
| 1-1/2 | 40 | 3000 | 49.2 / 48.7 | 41.7 / 40.1 | 5.6 | 32.0 | 12.0 | 12.0 |
| 2 | 50 | 3000 | 61.7 / 61.2 | 53.3 / 51.7 | 6.1 | 38.0 | 12.0 | 12.0 |
| 2-1/2 | 65 | 3000 | 74.4 / 73.9 | 64.2 / 61.2 | 7.7 | 41.0 | 15.5 | 15.5 |
| 3 | 80 | 3000 | 90.3 / 89.8 | 79.6 / 76.6 | 8.3 | 48.0 | 15.5 | 15.5 |
| 4 | 100 | 3000 | 115.7 / 115.2 | 103.8 / 100.8 | 9.4 | 57.0 | 19.0 | 19.0 |
| 1/8 | 6 | 6000 | 11.2 / 10.8 | 5.5 / 4.0 | 4.0 | 11.0 | 6.0 | 6.0 |
| 1/4 | 8 | 6000 | 14.6 / 14.1 | 7.9 / 6.4 | 4.3 | 13.5 | 6.0 | 6.0 |
| 3/8 | 10 | 6000 | 18.0 / 17.5 | 11.2 / 9.7 | 4.8 | 15.5 | 6.0 | 6.0 |
| 1/2 | 15 | 6000 | 22.2 / 21.7 | 14.4 / 12.9 | 5.6 | 19.0 | 8.0 | 8.0 |
| 3/4 | 20 | 6000 | 27.6 / 27.1 | 19.5 / 18.0 | 6.1 | 22.0 | 8.0 | 8.0 |
| 1 | 25 | 6000 | 34.3 / 33.8 | 25.1 / 23.6 | 7.0 | 27.0 | 9.5 | 9.5 |
| 1-1/4 | 32 | 6000 | 43.1 / 42.6 | 33.7 / 32.2 | 7.0 | 32.0 | 9.5 | 9.5 |
| 1-1/2 | 40 | 6000 | 49.2 / 48.7 | 39.4 / 37.8 | 7.5 | 38.0 | 12.0 | 12.0 |
| 2 | 50 | 6000 | 61.7 / 61.2 | 51.0 / 49.4 | 8.6 | 41.0 | 12.0 | 12.0 |
| 1/2 | 15 | 9000 | 22.2 / 21.7 | 11.0 / 9.5 | 8.2 | 22.0 | 8.0 | 8.0 |
| 3/4 | 20 | 9000 | 27.6 / 27.1 | 15.7 / 14.2 | 8.5 | 27.0 | 8.0 | 8.0 |
| 1 | 25 | 9000 | 34.3 / 33.8 | 21.0 / 19.5 | 9.8 | 32.0 | 9.5 | 9.5 |
| 1-1/4 | 32 | 9000 | 43.1 / 42.6 | 29.6 / 28.1 | 9.8 | 38.0 | 9.5 | 9.5 |
| 1-1/2 | 40 | 9000 | 49.2 / 48.7 | 35.3 / 33.7 | 10.2 | 41.0 | 12.0 | 12.0 |
| 2 | 50 | 9000 | 61.7 / 61.2 | 46.9 / 45.3 | 11.1 | 48.0 | 12.0 | 12.0 |
Key Features:
Design: Four-way fitting with one inlet and three outlets (or vice versa).
Connection Method: Pipes are inserted into the socket ends and joined using a fillet weld.
Size Range: Typically from ½” to 2″ NPS.
Pressure Ratings: Available in Class 3000, 6000, and 9000.
Ends: Socket weld ends as per ASME B16.11.
Advantages:
Leak-proof permanent connections
High strength & pressure resistance
Compact and space-saving
Suitable for vibration and fatigue environments
Available Materials:
Carbon Steel – ASTM A105
Stainless Steel – ASTM A182 F304, F316, etc.
Alloy Steel – ASTM A182 F11, F22
Duplex & Super Duplex – UNS S31803, S32750
Nickel Alloys – Inconel, Monel, Hastelloy
Standards & Specifications:
Design Standard: ASME B16.11
Manufacturing Standard: MSS-SP-83
Testing: Hydrostatic & NDT (as required)
Dimensions & Tolerances: Per ASME B16.11
Applications:
Oil & Gas pipelines
Petrochemical plants
Power generation
Chemical processing
High-pressure steam systems