Threaded Pipe Plug Specification
| Standards Specification Of : | ASME B16.11 Plug |
|---|---|
| MSS SP-43 | Corrosion Resistant for Low Pressure, Fabricated and Wrought Butt-Welding Fittings Applications |
| ASTM A182 – ASME SA182 | Standard for Wrought Austenitic Stainless Steel Piping Fittings |
| ASME B16.9 | Wrought Buttwelding Fittings |
| ASME B16.11 | Socket & Threaded– Welding, Forged Fittings |
| MSS SP-95 | Bull Plugs & Swage(d) Nipples |
| BS3799 | Specification of screwed and Socket-welding, Steel pipe fittings |
Female Threaded Plug Dimensions
| ASME B16.11 Threaded Plug Dimensions (BS 3799) (in Millimeter) | ||||||||
| NPS | Length (Mini.) A |
|||||||
| Plugs Square Head | Plugs Round Head | Hex Plugs & Bushings | ||||||
| Height of Square (Mini.) B |
Width Flats (Mini.) C |
Nominal Dia. of Head E |
Length (Mini.) D |
Width Flats (Nominal) F |
Hex Height (Minimum) | |||
| Bushing G |
Plug H |
|||||||
| 1/8” | 9.7 | 6.6 | 7.1 | 10.4 | 35.1 | 11.2 | – | 6.4 |
| 1/4” | 11.2 | 6.6 | 9.7 | 13.5 | 41.1 | 15.7 | 3.0 | 6.4 |
| 3/8” | 12.7 | 7.9 | 11.2 | 17.5 | 41.1 | 17.5 | 4.1 | 7.9 |
| 1/2” | 14.2 | 9.7 | 14.2 | 21.3 | 44.5 | 22.4 | 4.8 | 7.9 |
| 3/4” | 15.7 | 11.2 | 15.7 | 26.9 | 44.5 | 26.9 | 5.6 | 9.7 |
| 1” | 19.1 | 12.7 | 20.6 | 33.3 | 50.8 | 35.1 | 6.4 | 9.7 |
| 1-1/4” | 20.6 | 14.2 | 23.9 | 42.9 | 50.8 | 44.5 | 7.1 | 14.2 |
| 1-1/2” | 20.6 | 15.7 | 28.4 | 48.5 | 50.8 | 50.8 | 7.9 | 15.7 |
| 2” | 22.4 | 17.5 | 33.3 | 60.5 | 63.5 | 63.5 | 8.6 | 17.5 |
| 2-2/2” | 26.9 | 19.1 | 38.1 | 73.2 | 69.9 | 76.2 | 9.7 | 19.1 |
| 3” | 28.4 | 20.6 | 42.9 | 88.9 | 69.9 | 88.9 | 10.4 | 20.6 |
| 4” | 31.8 | 25.4 | 53.5 | 114.3 | 76.2 | 117.3 | 12.7 | 25.4 |
ASME B16.11 Plug Temperature Class
| Pressure-Temperature for ASME B16.11 Fittings (psig) | |||||
|---|---|---|---|---|---|
| Temperature | Class | ||||
| 150 | 300 | ||||
| 1/4 - 1 in. | 1 1/4 - 2 in. | 2 1/2 - 3 in. | |||
| (oF) | (oC) | ||||
| -20 to 150 | -29 to 66 | 300 | 2000 | 1500 | 1000 |
| 200 | 93 | 265 | 1785 | 1350 | 910 |
| 250 | 121 | 225 | 1575 | 1200 | 825 |
| 300 | 149 | 185 | 1360 | 1050 | 735 |
| 350 | 177 | 150 | 1150 | 900 | 650 |
| 400 | 204 | - | 935 | 750 | 560 |
| 450 | 232 | - | 725 | 600 | 475 |
| 500 | 260 | - | 510 | 450 | 385 |
| 550 | 288 | - | 300 | 300 | 300 |