Description
Product Description ASME B16.11 Half Coupling
ASME B16.11 Half Coupling is a versatile forged fitting widely used in piping systems to connect a pipe to another component. It features a threaded or socket-weld connection on one end, while the other end is typically left plain for welding or other connections. These fittings are highly durable and are designed to handle high-pressure applications.
Socket Weld Half Coupling Dimensions

NOMINAL PIPE SIZE | OUTER DIAMETER | SOCKET BORE DIAMETER | BORE DIAMETER OF FITTINGS | BORE DIAMETER OF FITTINGS | BORE DIAMETER OF FITTINGS | WALL THICKNESS | WALL THICKNESS | WALL THICKNESS | WALL THICKNESS | WALL THICKNESS | WALL THICKNESS | FULL COUPLING | FULL COUPLING | HALF COUPLING | HALF COUPLING |
| | | | | | # 3000 | # 3000 | # 6000 | # 6000 | # 9000 | # 9000 | | | | |
Inch. | A | B | C – 3000 | C – 6000 | C – 9000 | D | D | D | D | D | D | L1 | L2 | L1 | L2 |
| | Maximum | Maximum | Maximum | Maximum | Average | Minimum | Average | Minimum | Average | Minimum | | | | |
| | Minimum | Minimum | Minimum | Minimum | | | | | | | | | | |
1/8 | B+D | 11.2 | 7.6 | 4.8 | | 3.18 | 3.18 | 3.96 | 3.43 | | | 9.5 | 6.5 | 9.5 | 16 |
| | 10.8 | 6.1 | 3.2 | | | | | | | | | | | |
1/4 | B+D | 14.6 | 10 | 7.1 | | 3.78 | 3.3 | 4.6 | 4.01 | | | 9.5 | 6.5 | 9.5 | 16 |
| | 14.2 | 8.5 | 5.6 | | | | | | | | | | | |
3/8 | B+D | 18 | 13.3 | 9.9 | | 4.01 | 3.5 | 5.03 | 4.37 | | | 9.5 | 6.5 | 9.5 | 17.5 |
| | 17.6 | 11.8 | 8.4 | | | | | | | | | | | |
1/2 | B+D | 22.2 | 16.6 | 12.5 | 7.2 | 4.67 | 4.09 | 5.97 | 5.18 | 9.35 | 8.18 | 9.5 | 9.5 | 9.5 | 22.5 |
| | 21.8 | 15 | 11 | 5.6 | | | | | | | | | | |
3/4 | B+D | 27.6 | 21.7 | 16.3 | 11.8 | 4.9 | 4.27 | 6.96 | 6.04 | 9.78 | 8.56 | 12.5 | 9.5 | 12.5 | 24 |
| | 27.2 | 20.2 | 14.8 | 10.3 | | | | | | | | | | |
1 | B+D | 34.3 | 27.4 | 21.5 | 16 | 5.69 | 4.98 | 7.92 | 6.93 | 11.38 | 9.96 | 12.5 | 12.5 | 12.5 | 28.5 |
| | 33.9 | 25.9 | 19.9 | 14.4 | | | | | | | | | | |
1 1/4 | B+D | 43.1 | 35.8 | 30.2 | 23.5 | 6.07 | 5.28 | 7.92 | 6.93 | 12.14 | 10.62 | 12.5 | 12.5 | 12.5 | 30 |
| | 42.7 | 34.3 | 28.7 | 22 | | | | | | | | | | |
1 1/2 | B+D | 49.2 | 41.6 | 34.7 | 28.7 | 6.35 | 5.54 | 8.92 | 7.8 | 12.7 | 11.12 | 12.5 | 12.5 | 12.5 | 32 |
| | 48.8 | 40.1 | 33.2 | 27.2 | | | | | | | | | | |
2 | B+D | 61.7 | 53.3 | 43.6 | 38.9 | 6.93 | 6.04 | 10.92 | 9.5 | 13.84 | 12.12 | 16 | 19 | 16 | 41 |
| | 61.2 | 51.7 | 42.1 | 37.4 | | | | | | | | | | |
2 1/2 | B+D | 74.4 | 64.2 | | | 8.76 | 7.67 | | | | | 16 | 19 | 16 | 43 |
| | 73.9 | 61.2 | | | | | | | | | | | | |
3 | B+D | 90.3 | 79.4 | | | 9.52 | 8.3 | | | | | 16 | 19 | 16 | 44.5 |
| | 89.8 | 76.4 | | | | | | | | | | | | |
4 | B+D | 103.8 | 103.8 | | | 10.69 | 9.35 | | | | | 16 | 19 | 16 | 48 |
| | 100.7 | 100.7 | | | | | | | | | | | | |
Specifications:
- Standard: ASME B16.11
- Type: Half Coupling (Threaded / Socket Weld)
- Size Range:
- Threaded: 1/8″ to 4″
- Socket Weld: 1/8″ to 4″
- Pressure Rating:
- 2000#, 3000#, 6000#, 9000#
- Connection Type:
- Threaded (NPT/BSP)
- Socket Weld
ASME B16.11 Half Coupling Pressure Rating’
Material |
Class 3000 |
Class 6000 |
Class 9000 |
Carbon Steel (A105) |
1980 psi |
2975 psi |
4465 psi |
Stainless Steel |
1980 psi |
2975 psi |
4465 psi |
Alloy Steel |
2000 psi |
3000 psi |
4500 psi |
Materials:
- Carbon Steel: ASTM A105, ASTM A350 LF2
- Stainless Steel: ASTM A182 F304, F304L, F316, F316L
- Alloy Steel: ASTM A182 F5, F9, F11, F22, F91
- Nickel Alloys: Inconel, Hastelloy, Monel
- Duplex & Super Duplex Steel: ASTM A182 F51, F53, F55
- Copper Alloys: Brass, Bronze
Key Features:
- High strength and durability.
- Leak-proof connections for high-pressure systems.
- Corrosion resistance depending on material choice.
- Easy installation and maintenance.
- Suitable for small-diameter piping systems.
Surface Treatment:
- Black Coated
- Galvanized
- Anti-Rust Oil Coating
Applications:
- Oil and Gas Industries
- Chemical and Petrochemical Processing
- Power Generation Plants
- Water Treatment Plants
- Shipbuilding and Marine Applications
- General Piping Systems
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