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| Industrial Grade Steel NPT Threaded Flange
Threaded Flanges: A Secure, Weld-Free Connection Solution
Threaded flanges are designed for easy installation and maintenance without the need for welding. Instead, these flanges feature pipe threads on the inner hole, allowing them to connect securely with threaded pipes. They are commonly made from stainless steel or carbon steel, but can also be constructed from duplex steel or alloy steel.
Considerations
While threaded flanges are suitable for many applications, they are not recommended for pipelines that experience significant temperature fluctuations or temperatures exceeding 260°C (500°F) or below -45°C (-49°F), as this may lead to potential leakage.
Ideal Applications
Threaded flanges are particularly useful in situations where alloy steel flanges are needed but welding is not feasible or the welding performance is subpar. They offer a reliable and efficient solution for maintaining pipeline integrity without the need for on-site welding.
Key Factors Influencing Cost
1. Material: Carbon steel threaded flanges are more affordable than stainless steel or alloy steel options.
2. Size and Pressure Rating: Larger sizes and higher pressure ratings increase costs.
3. Application: Threaded flanges are most cost-effective for low-pressure, small-diameter applications
| Advantage
Easy Connection
Threaded flanges are ideal for pipelines where on-site welding is not allowed or impractical. They offer a quick and convenient alternative to flat welding flanges or butt welding flanges.
Reliable sealing
NPT or BSP thread flange can be connected with a sealing gasket, makes a good sealing performance that it will not leak oil or air during the operation of the pipeline. We normally use good sealing material such as NBR, PTFE, EPDM, silicon and non-asbestos etc.
Strong Adaptability
Threaded flanges are applicative for low pressure and small diameter pipe connections. It's suitable for connecting various steel pipes and pipe fittings that can connect different materials, as well as single or double layer welded steel pipes.
| Size
| Class 150 lb Threaded Flange Dimensions | ||||||||||
| NPS | A | C | D | E | F | G | H | I | J | W |
| inch | inch | inch | inch | inch | inch | No. of Holes | inch | inch | kg/pc | |
| mm | mm | mm | mm | mm | mm | mm | mm | |||
| 1/2 | 3.5 | 0.44 | 0.62 | 0.62 | 1.19 | 1.38 | 4 | 0.62 | 2.38 | 0.39 |
| 88.9 | 11.2 | 15.7 | 15.7 | 30.2 | 35.1 | 15.7 | 60.45 | |||
| 3/4 | 3.88 | 0.5 | 0.62 | 0.62 | 1.5 | 1.69 | 4 | 0.62 | 2.75 | 0.56 |
| 98.6 | 12.7 | 15.7 | 15.7 | 38.1 | 42.9 | 15.7 | 69.85 | |||
| 1 | 4.25 | 0.56 | 0.69 | 0.69 | 1.94 | 2 | 4 | 0.62 | 3.12 | 0.78 |
| 108 | 14.2 | 17.5 | 17.5 | 49.3 | 50.8 | 15.7 | 79.25 | |||
| 1 1/4 | 4.62 | 0.62 | 0.81 | 0.81 | 2.31 | 2.5 | 4 | 0.62 | 3.5 | 1.03 |
| 117.3 | 15.7 | 20.6 | 20.6 | 58.7 | 63.5 | 15.7 | 88.9 | |||
| 1 1/2 | 5 | 0.69 | 0.88 | 0.88 | 2.56 | 2.88 | 4 | 0.62 | 3.88 | 1.32 |
| 127 | 17.5 | 22.4 | 22.3 | 65 | 73.15 | 15.7 | 98.6 | |||
| 2 | 6 | 0.75 | 1 | 1 | 3.06 | 3.62 | 4 | 0.75 | 4.75 | 2.06 |
| 152.4 | 19.1 | 25.4 | 25.4 | 77.7 | 91.9 | 0.75 | 4.75 | |||
| 2 1/2 | 7 | 0.88 | 1.12 | 1.12 | 3.56 | 4.12 | 4 | 0.75 | 5.5 | 3.28 |
| 177.8 | 22.4 | 28.4 | 28.4 | 90.4 | 104.6 | 19.1 | 139.7 | |||
| 3 | 7.5 | 0.94 | 1.19 | 1.19 | 4.25 | 5 | 4 | 0.75 | 6 | 3.85 |
| 190.5 | 23.9 | 30.2 | 30.2 | 108 | 127 | 19.1 | 152.4 | |||
| 3 1/2 | 8.5 | 0.94 | 1.25 | 1.25 | 4.81 | 5.5 | 8 | 0.75 | 7 | 4.81 |
| 215.9 | 23.9 | 31.75 | 31.75 | 122.2 | 139.7 | 19.1 | 177.8 | |||
| 4 | 9 | 0.94 | 1.31 | 1.31 | 5.31 | 6.19 | 8 | 0.75 | 7.5 | 5.3 |
| 228.6 | 23.9 | 33.3 | 33.3 | 134.9 | 157.2 | 19.1 | 190.5 | |||
| 5 | 10 | 0.94 | 1.44 | 1.44 | 6.44 | 7.31 | 8 | 0.88 | 8.5 | 6.07 |
| 254 | 23.9 | 36.6 | 36.6 | 163.6 | 185.7 | 22.4 | 215.9 | |||
| 6 | 11 | 1 | 1.56 | 1.56 | 7.56 | 8.5 | 8 | 0.88 | 9.5 | 7.45 |
| 279.4 | 25.4 | 39.6 | 39.6 | 192 | 215.9 | 22.4 | 241.3 | |||
| 8 | 13.5 | 1.12 | 1.75 | 1.75 | 9.69 | 10.62 | 8 | 0.88 | 11.75 | 12.1 |
| 342.9 | 28.4 | 44.5 | 44.5 | 246.1 | 269.7 | 22.4 | 298.5 | |||
| 10 | 16 | 1.19 | 1.94 | 1.94 | 12 | 12.75 | 12 | 1 | 14.25 | 16.5 |
| 406.4 | 30.2 | 49.3 | 49.3 | 304.8 | 323.9 | 25.4 | 362 | |||
| 12 | 19 | 1.25 | 2.19 | 2.19 | 14.38 | 15 | 12 | 1 | 17 | 26.2 |
| 482.6 | 31.75 | 55.6 | 55.6 | 365.3 | 381 | 25.4 | 431.8 | |||
| 14 | 21 | 1.38 | 2.25 | 2.25 | 15.75 | 16.25 | 12 | 1.12 | 18.75 | 34.6 |
| 533.4 | 35.1 | 57.15 | 57.15 | 400.1 | 412.7 | 28.4 | 476.3 | |||
| 16 | 23.5 | 1.44 | 2.5 | 2.5 | 18 | 18.5 | 16 | 1.12 | 21.25 | 44.8 |
| 596.9 | 36.6 | 63.5 | 63.5 | 457.2 | 469.9 | 28.4 | 539.8 | |||
| 18 | 25 | 1.56 | 2.69 | 2.69 | 19.88 | 21 | 16 | 1.25 | 22.75 | 48.9 |
| 635 | 39.6 | 68.3 | 68.3 | 505 | 533.4 | 31.75 | 577.9 | |||
| 20 | 27.5 | 1.69 | 2.88 | 2.88 | 22 | 23 | 20 | 1.25 | 25 | 61.9 |
| 698.5 | 42.9 | 73.15 | 73.15 | 558.8 | 584.2 | 31.75 | 635 | |||
| 24 | 32 | 1.88 | 3.25 | 3.25 | 26.12 | 27.25 | 20 | 1.38 | 29.5 | 86.9 |
| 812.8 | 47.8 | 82.6 | 82.6 | 663.4 | 692.2 | 35.1 | 749.3 | |||
| Flange parameter table
| Industrial Grade Steel NPT Threaded Flange
Threaded Flanges: A Secure, Weld-Free Connection Solution
Threaded flanges are designed for easy installation and maintenance without the need for welding. Instead, these flanges feature pipe threads on the inner hole, allowing them to connect securely with threaded pipes. They are commonly made from stainless steel or carbon steel, but can also be constructed from duplex steel or alloy steel.
Considerations
While threaded flanges are suitable for many applications, they are not recommended for pipelines that experience significant temperature fluctuations or temperatures exceeding 260°C (500°F) or below -45°C (-49°F), as this may lead to potential leakage.
Ideal Applications
Threaded flanges are particularly useful in situations where alloy steel flanges are needed but welding is not feasible or the welding performance is subpar. They offer a reliable and efficient solution for maintaining pipeline integrity without the need for on-site welding.
Key Factors Influencing Cost
1. Material: Carbon steel threaded flanges are more affordable than stainless steel or alloy steel options.
2. Size and Pressure Rating: Larger sizes and higher pressure ratings increase costs.
3. Application: Threaded flanges are most cost-effective for low-pressure, small-diameter applications
| Advantage
Easy Connection
Threaded flanges are ideal for pipelines where on-site welding is not allowed or impractical. They offer a quick and convenient alternative to flat welding flanges or butt welding flanges.
Reliable sealing
NPT or BSP thread flange can be connected with a sealing gasket, makes a good sealing performance that it will not leak oil or air during the operation of the pipeline. We normally use good sealing material such as NBR, PTFE, EPDM, silicon and non-asbestos etc.
Strong Adaptability
Threaded flanges are applicative for low pressure and small diameter pipe connections. It's suitable for connecting various steel pipes and pipe fittings that can connect different materials, as well as single or double layer welded steel pipes.
| Size
| Class 150 lb Threaded Flange Dimensions | ||||||||||
| NPS | A | C | D | E | F | G | H | I | J | W |
| inch | inch | inch | inch | inch | inch | No. of Holes | inch | inch | kg/pc | |
| mm | mm | mm | mm | mm | mm | mm | mm | |||
| 1/2 | 3.5 | 0.44 | 0.62 | 0.62 | 1.19 | 1.38 | 4 | 0.62 | 2.38 | 0.39 |
| 88.9 | 11.2 | 15.7 | 15.7 | 30.2 | 35.1 | 15.7 | 60.45 | |||
| 3/4 | 3.88 | 0.5 | 0.62 | 0.62 | 1.5 | 1.69 | 4 | 0.62 | 2.75 | 0.56 |
| 98.6 | 12.7 | 15.7 | 15.7 | 38.1 | 42.9 | 15.7 | 69.85 | |||
| 1 | 4.25 | 0.56 | 0.69 | 0.69 | 1.94 | 2 | 4 | 0.62 | 3.12 | 0.78 |
| 108 | 14.2 | 17.5 | 17.5 | 49.3 | 50.8 | 15.7 | 79.25 | |||
| 1 1/4 | 4.62 | 0.62 | 0.81 | 0.81 | 2.31 | 2.5 | 4 | 0.62 | 3.5 | 1.03 |
| 117.3 | 15.7 | 20.6 | 20.6 | 58.7 | 63.5 | 15.7 | 88.9 | |||
| 1 1/2 | 5 | 0.69 | 0.88 | 0.88 | 2.56 | 2.88 | 4 | 0.62 | 3.88 | 1.32 |
| 127 | 17.5 | 22.4 | 22.3 | 65 | 73.15 | 15.7 | 98.6 | |||
| 2 | 6 | 0.75 | 1 | 1 | 3.06 | 3.62 | 4 | 0.75 | 4.75 | 2.06 |
| 152.4 | 19.1 | 25.4 | 25.4 | 77.7 | 91.9 | 0.75 | 4.75 | |||
| 2 1/2 | 7 | 0.88 | 1.12 | 1.12 | 3.56 | 4.12 | 4 | 0.75 | 5.5 | 3.28 |
| 177.8 | 22.4 | 28.4 | 28.4 | 90.4 | 104.6 | 19.1 | 139.7 | |||
| 3 | 7.5 | 0.94 | 1.19 | 1.19 | 4.25 | 5 | 4 | 0.75 | 6 | 3.85 |
| 190.5 | 23.9 | 30.2 | 30.2 | 108 | 127 | 19.1 | 152.4 | |||
| 3 1/2 | 8.5 | 0.94 | 1.25 | 1.25 | 4.81 | 5.5 | 8 | 0.75 | 7 | 4.81 |
| 215.9 | 23.9 | 31.75 | 31.75 | 122.2 | 139.7 | 19.1 | 177.8 | |||
| 4 | 9 | 0.94 | 1.31 | 1.31 | 5.31 | 6.19 | 8 | 0.75 | 7.5 | 5.3 |
| 228.6 | 23.9 | 33.3 | 33.3 | 134.9 | 157.2 | 19.1 | 190.5 | |||
| 5 | 10 | 0.94 | 1.44 | 1.44 | 6.44 | 7.31 | 8 | 0.88 | 8.5 | 6.07 |
| 254 | 23.9 | 36.6 | 36.6 | 163.6 | 185.7 | 22.4 | 215.9 | |||
| 6 | 11 | 1 | 1.56 | 1.56 | 7.56 | 8.5 | 8 | 0.88 | 9.5 | 7.45 |
| 279.4 | 25.4 | 39.6 | 39.6 | 192 | 215.9 | 22.4 | 241.3 | |||
| 8 | 13.5 | 1.12 | 1.75 | 1.75 | 9.69 | 10.62 | 8 | 0.88 | 11.75 | 12.1 |
| 342.9 | 28.4 | 44.5 | 44.5 | 246.1 | 269.7 | 22.4 | 298.5 | |||
| 10 | 16 | 1.19 | 1.94 | 1.94 | 12 | 12.75 | 12 | 1 | 14.25 | 16.5 |
| 406.4 | 30.2 | 49.3 | 49.3 | 304.8 | 323.9 | 25.4 | 362 | |||
| 12 | 19 | 1.25 | 2.19 | 2.19 | 14.38 | 15 | 12 | 1 | 17 | 26.2 |
| 482.6 | 31.75 | 55.6 | 55.6 | 365.3 | 381 | 25.4 | 431.8 | |||
| 14 | 21 | 1.38 | 2.25 | 2.25 | 15.75 | 16.25 | 12 | 1.12 | 18.75 | 34.6 |
| 533.4 | 35.1 | 57.15 | 57.15 | 400.1 | 412.7 | 28.4 | 476.3 | |||
| 16 | 23.5 | 1.44 | 2.5 | 2.5 | 18 | 18.5 | 16 | 1.12 | 21.25 | 44.8 |
| 596.9 | 36.6 | 63.5 | 63.5 | 457.2 | 469.9 | 28.4 | 539.8 | |||
| 18 | 25 | 1.56 | 2.69 | 2.69 | 19.88 | 21 | 16 | 1.25 | 22.75 | 48.9 |
| 635 | 39.6 | 68.3 | 68.3 | 505 | 533.4 | 31.75 | 577.9 | |||
| 20 | 27.5 | 1.69 | 2.88 | 2.88 | 22 | 23 | 20 | 1.25 | 25 | 61.9 |
| 698.5 | 42.9 | 73.15 | 73.15 | 558.8 | 584.2 | 31.75 | 635 | |||
| 24 | 32 | 1.88 | 3.25 | 3.25 | 26.12 | 27.25 | 20 | 1.38 | 29.5 | 86.9 |
| 812.8 | 47.8 | 82.6 | 82.6 | 663.4 | 692.2 | 35.1 | 749.3 | |||
| Flange parameter table
