Socket Weld Fittings
Horizon Steel N Alloyspecializes in high-pressure forged socket weld fittings designed for critical, small-bore piping systems. Manufactured to rigorous ASME B16.11 standards, these fittings provide exceptional structural strength and leak-proof fillet-weld integrity for toxic, flammable, and high-temperature fluid lines.
- Class 3000, 6000 & 9000 Pressure Ratings
- Self-Aligning Design (No Beveling Required)
- 100% MPI & Ultrasonic Tested Forgings
Available Materials & Grades
| Material Type | Forged Material Grades | International Standards |
|---|---|---|
| Stainless Steel | F304, F304L, F316, F316L, F317L, F321, F347, F904L | ASTM A182 |
| Carbon & Low Temp Steel | A105, A105N, A350 LF2, A350 LF3 | ASTM A105, ASTM A350 |
| Alloy Steel | F1, F5, F9, F11, F12, F22, F91 | ASTM A182 |
| Duplex & Super Duplex | F51 (UNS S31803), F53 (UNS S32750), F55 (Zeron 100) | ASTM A182 |
| High Nickel Alloys | Inconel 600/625, Hastelloy C276, Monel 400, Alloy 20 | ASTM B564, ASTM B462 |
Comprehensive Technical Specifications
| Specification Parameter | Detailed Range & Capabilities |
|---|---|
| Fitting Formats & Items | 45° / 90° Elbows, Equal / Reducing Tees, Crosses, Full / Half Couplings, Bosses, Caps, and Socket Weld Unions. |
| Size Range (Nominal Bore) | 1/8" NB to 4" NB (DN6 to DN100) — Specifically engineered for small-bore piping systems. |
| Pressure Ratings (Class) |
Class 3000: Matches SCH 80 / XS Pipe Wall. Class 6000: Matches SCH 160 Pipe Wall. Class 9000: Matches XXS Pipe Wall. |
| Manufacturing Method | Solid closed-die forging followed by precision CNC machining for absolute bore alignment and socket recess depth. |
| Dimensional Standards | ASME B16.11, BS 3799, MSS SP-79 (Reducer Inserts), MSS SP-83 (Unions), MSS SP-95. |
| Testing & Compliance | Hydrostatic integrity testing, Magnetic Particle Inspection (MPI) for surface cracks, Ultrasonic Testing (UT) for internal voids, and NACE MR0175 / ISO 15156 compliance for sour gas environments. |
Structural Types & Formats
SW Elbows (45° & 90°)
Heavy-duty forged elbows designed for sharp directional changes in small-bore lines. The socket recess prevents pipe misalignment during the fillet welding process.
SW Tees & Crosses
Creates robust 90-degree branch connections. Available in equal bore or reducing bore formats to manage multi-directional fluid distribution safely under high pressure.
Full & Half Couplings
Used to connect two lengths of pipe continuously (Full) or to branch directly off a larger header vessel (Half). Eliminates the risk of thread-galling leaks.
Socket Weld Unions
A specialized three-piece forged fitting that allows for the rapid disconnection and dismantling of pipe systems without the need to cut the permanent welds.