ASME B16.11 Coupling ASME B16.11 also includes specifications for forged steel couplings, which are fittings used in piping systems to connect two pipes together. These couplings are available in both socket-weld and threaded configurations. ASME B16.11 is one of several standards that cover different types of forged steel fittings used in piping systems. Engineers and designers should refer to the specific standard applicable to their project and follow the guidelines relevant to the intended application.
| Specification Chart: | ASME B16.11 Coupling |
|---|---|
| Manufacturer Types | Full Coupling Half Coupling Reducing Coupling |
| Test Certificates | EN 10204/3.1B Raw Materials Certificate 100% Radiography Test Report Third Party Inspection Report, etc |
| Production Technique | Forged/ Heat treated and machined |
| Our service | Nace Mr 01 75 Sour Service Impact Test As Per Ug 84 Macro Structure Analysis Hydrogen Induce Cracking Test (Hic) Sulphide Stress Cracking Test (Sscc) Cryogenic Services (Cryo),hydrogen Services (H2) Helieum Leak Test Dye Peniterant Test (Dp) Magnetic Partius Test (Mp) Post Weld Heat Treatment (Pwht) Ultrasonic Test (Ut) Hydro Test, Etc. |
| Method Types | Threaded (NPT) Socket Weld BSPT BSP |
| Type Of Standards | Bs3799 ASME B16.11 MSS SP 83 MSS SP 95 MSS SP 79 JIS B2302 |
| Application | Power/ gas/ petroleum/ chemical/ metallurgy/ shipbuilding etc. |
| Manufacturer Size | SW Fitting = ½” Inch To 8” Inch Threaded (NPT) Fitting = ½” Inch To 8” Inch |
| Pressure Class | SW Fitting = Class 3000/ Class 6000/ Class 9000 NPT Fitting = Class 2000/ Class 3000/ Class 6000 |
NPS 1/2 to 4 - 3000 LBS
| Nornal Pipe Size | End to End | Outer Diameter | Thread Length (Minimum) | |
| (A) | (D) | (B) | (J) | |
| 1/2 | 48 | 28 | 10.9 | 13.6 |
| 3/4 | 51 | 35 | 12.7 | 13.9 |
| 1 | 60 | 44 | 14.7 | 17.3 |
| 1 ¼ | 67 | 57 | 17 | 18 |
| 1 ½ | 79 | 64 | 17.8 | 18.4 |
| 2 | 86 | 76 | 19 | 19.2 |
| 2 ½ | 92 | 92 | 23.6 | 28.9 |
| 3 | 108 | 108 | 25.9 | 30.5 |
| 4 | 121 | 140 | 27.7 | 33 |
NPS 1/2 to 4 - 6000 LBS
| Normal Pipe Size | End to End | Outer Diameter | Thread Length (Min.) | |
| (A) | (D) | (B) | (J) | |
| 1/2 | 48 | 38 | 10.9 | 13.6 |
| 3/4 | 51 | 44 | 12.7 | 13.9 |
| 1 | 60 | 57 | 14.7 | 17.3 |
| 1 ¼ | 67 | 64 | 17 | 18 |
| 1 ½ | 79 | 76 | 17.8 | 18.4 |
| 2 | 86 | 92 | 19 | 19.2 |
| 2 ½ | 92 | 108 | 23.6 | 28.9 |
| 3 | 108 | 127 | 25.9 | 30.5 |
| 4 | 121 | 159 | 27.7 | 33 |
NPS 1/2 to 4 - 3000 LBS
| Normal Pipe Size | End to End | Outer Diameter | Thread Length (Min.) | |
| (A) | (D) | (B) | (J) | |
| 1/2 | 48 | 28 | 10.9 | 13.6 |
| 3/4 | 51 | 35 | 12.7 | 13.9 |
| 1 | 60 | 44 | 14.7 | 17.3 |
| 1 ¼ | 67 | 57 | 17 | 18 |
| 1 ½ | 79 | 64 | 17.8 | 18.4 |
| 2 | 86 | 76 | 19 | 19.2 |
| 2 ½ | 92 | 92 | 23.6 | 28.9 |
| 3 | 108 | 108 | 25.9 | 30.5 |
| 4 | 121 | 140 | 27.7 | 33 |
NPS 1/2 to 4 - 6000 LBS
| Normal Pipe Size | End to End | Outer Diameter | Thread Length (Min.) | |
| A | D | B | J | |
| 1/2 | 48 | 38 | 10.9 | 13.6 |
| 3/4 | 51 | 44 | 12.7 | 13.9 |
| 1 | 60 | 57 | 14.7 | 17.3 |
| 1 ¼ | 67 | 64 | 17 | 18 |
| 1 ½ | 79 | 76 | 17.8 | 18.4 |
| 2 | 86 | 92 | 19 | 19.2 |
| 2 ½ | 92 | 108 | 23.6 | 28.9 |
| 3 | 108 | 127 | 25.9 | 30.5 |
| 4 | 121 | 159 | 27.7 | 33 |
| Description | Class Designation | ||
| Class 2000 | Class 3000 | Class 6000 | |
| Coupling Half-Coupling |
1/2 – 4 | 1/2 – 2 | 1/2 – 2 |
| 1/2 – 4 | 1/2 – 2 | 1/2 – 2 | |
| 1/2 – 4 | 1/2 – 2 | 1/2 – 2 | |
| Normal Sizes | Couplings Weight in Kilogram | Half Couplings Weight in Kilogram | |||
|---|---|---|---|---|---|
| INCHES | MM | Class 3000# | Class 6000# | Class 3000# | Class 6000# |
| 1/8" | 6 | 0.05 | 0.10 | 0.02 | 0.04 |
| 1/4" | 8 | 0.05 | 0.10 | 0.03 | 0.05 |
| 3/8" | 10 | 0.06 | 0.12 | 0.03 | 0.06 |
| 1/2" | 15 | 0.14 | 0.37 | 0.07 | 0.19 |
| 3/4" | 20 | 0.20 | 0.45 | 0.11 | 0.23 |
| 1" | 25 | 0.39 | 1.00 | 0.20 | 0.50 |
| 1.1/4" | 32 | 0.73 | 1.65 | 0.37 | 0.83 |
| 1.1/2" | 40 | 1.03 | 1.85 | 0.51 | 0.92 |
| 2" | 50 | 1.35 | 2.80 | 0.66 | 1.40 |
| 2.1/2" | 65 | 2.30 | 4.00 | 1.15 | 2.00 |
| 3" | 80 | 3.15 | 5.50 | 1.57 | 2.75 |
| 4" | 100 | 5.80 | 10.00 | 2.90 | 5.00 |
| Dimensions Of ASTM A105 Forged Fittings | Up to 2" (Size) NB | 2 1/2" & 3" (Size)NB | |
| • Bore Of Socket Weld | + 0.25 | + 0.38 | |
| - 0.00 | - 0.00 | ||
| • Body Bore | + 0.00 | + 0.00 | |
| - 1.52 | - 3.00 | ||
| A | 1/4" NB (Size) | ± 0.8 | ± 2.50 |
| 3/8" TO 3/4" NB (Size) | ± 1.6 | ||
| 1"T0 2"NB (Size) | ± 2.0 | ||
| Standard | System Name |
|---|---|
|
British Standard Pipe
|
(BSP)
|
|
British Standard Pipe Parallel Thread
|
(BSPP)
|
|
British Standard Pipe Taper Thread
|
(BSPT)
|
|
National Pipe Thread
|
(NPT)
|
|
National Pipe Thread Fuel
|
(NPTF)
|
| Class 3000 Threaded | ||||||||||||
| A | 1.25" | 1.38" | 1.50" | 1.88" | 2.00" | 2.38" | 2.63" | 3.13" | 3.38" | 3.63" | 4.25" | 4.75" |
| B | .63" | .75" | .88" | 1.13" | 1.38" | 1.75" | 2.25" | 2.50" | 3.00" | 3.63" | 4.25" | 5.50" |
| Class 3000 Socket Weld | ||||||||||||
| A | 1.03" | 1.03" | 1.09" | 1.25" | 1.34" | 1.42" | 1.42" | 1.42" | 1.91" | 1.87" | 1.87" | 2.13" |
| B | .75" | .88" | 1.06" | 1.25" | 1.50" | 1.88" | 2.25" | 2.50" | 3.00" | 3.63" | 4.31" | 5.50" |
| C | .43" | .56" | .70" | .86" | 1.07" | 1.34" | 1.68" | 1.92" | 2.41" | 2.92" | 3.55" | 4.55" |
| D | .38" | .38" | .38" | .38" | .50" | .50" | .50" | .50" | .62" | .62" | .62" | .75" |
| E | .25" | .25" | .25" | .38" | .38" | .50" | .50" | .50" | .75" | .75" | .75" | .75" |
