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BS3799 Stainless Steel Screwed Union A182 (F6, F429, F430)
Stainless Steel Screwed Union
**Product Type:**
Full coupling, Half coupling, Reducing coupling, Reducer insert, Union, 90° elbow, 45° elbow, Tee, Cross, Cap, Square head plug, Hex head plug, Round head plug, Hex head bushing, Reducing swage, Welding Boss, Mitre Boss, High Pressure Boss, Socket Reducing Insert.
**Size:**
1/2" to 4" (DN15 ~ DN100)
**Range (Wall Thickness):**
3000LB to 9000LB
XS, Sch80, Sch160, XXS
**Standard:**
ASME/ANSI B16.11, MSS SP-79, MSS SP-83, MSS SP-95, MSS SP-114, JIS B2316, JIS B2302, etc.
**Material:**
Stainless steel, Duplex steel, Alloy steel, Carbon steel, Low-temperature steel, Nonferrous metal (Nickel Alloy, Aluminum Alloy, Titanium Alloy, etc.)
**+ SOCKET WELD FITTINGS**
Socket weld fittings are commonly used in small bore piping systems (NPS 2 or smaller). These fittings are designed to be inserted into a recessed area of valves, flanges, or other fittings and joined with fillet welds. This method provides high leakage integrity and structural strength, making it ideal for high-pressure applications. However, due to the use of fillet welds and abrupt geometry, fatigue resistance is lower than that of butt-welded joints. Despite this, socket weld fittings remain a reliable choice for many industrial processes.
**Types of Threaded Fittings by Class and Size**
| Description | Class Designation |
|-------------|-------------------|
| | 3000 | 6000 | 9000 |
| Elbows 45° & 90°, Tees, Crosses, Couplings, Half-Couplings, End or Pipe Caps | 1/2 - 4 | 1/2 - 2 | 1/2 - 2 |
| Elbows 45° & 90°, Tees, Crosses, Couplings, Half-Couplings, End or Pipe Caps | 1/2 - 4 | 1/2 - 2 | 1/2 - 2 |
| Elbows 45° & 90°, Tees, Crosses, Couplings, Half-Couplings, End or Pipe Caps | 1/2 - 4 | 1/2 - 2 | 1/2 - 2 |
| Pipe Size by Wall Thickness | SCH 80 / XS | SCH 160 | XXS |
*Plugs and Bushings are not identified. They may be used up through Class 6000 NPS.*
**+ THREADED FITTINGS**
Threaded joints are one of the oldest methods for joining piping systems. Like socket weld fittings, they are primarily used for small pipe diameters (NPS 2 or smaller). These fittings offer a simple and cost-effective solution for low to medium pressure applications.
**Types of Threaded Fittings by Class and Size**
| Description | Class Designation |
|-------------|-------------------|
| | 2000 | 3000 | 6000 |
| Elbows 45° & 90°, Tees, Crosses, Coupling, Half-Coupling, Cap | 1/2 - 4 | 1/2 - 2 | 1/2 - 2 |
| Elbows 45° & 90°, Tees, Crosses, Coupling, Half-Coupling, Cap | 1/2 - 4 | 1/2 - 2 | 1/2 - 2 |
| Elbows 45° & 90°, Tees, Crosses, Coupling, Half-Coupling, Cap | 1/2 - 4 | 1/2 - 2 | 1/2 - 2 |
| Pipe Wall | SCH 80 / XS | SCH 160 | XXS |
*Plugs and Bushings are not identified. They may be used up through Class 6000.*