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What is NPT Threaded Pipe Nipple
NPT threaded pipe nipple is a short piece of pipe usually with external/male threads in both ends or in one end for connecting two other pipes or fittings. The threads at two ends can be the same or different types, such as NPT thread.
In addition, NPT threaded pipe nipple is one of the most popular categories of pipe fittings, a combination of pipe nipples is recommended for low-pressure discharge and suction service for various compatible liquids and not for compressible products like air, nitrogen, or steam.
And the length of the nipple is usually specified by the total length of the threaded portion. Moreover, it may have a hexagonal section in the center for a wrench to grasp (which is called hex nipple), or it may simply make from a piece of straight pipe (which is called barrel nipple or pipe nipple). When the nipple ends are of two different sizes it is called a reducer or unequal nipple, and threads used on nipples are BSP, BSPT, NPT, NPSM, and Metric.
What is NPT Thread
NPT stands for National Pipe Thread and is an American standard thread. It may also be refered to as MPT , MNPT or NPT (M) for male external threads and FPT, FNPT or NPT(F) for female internal threads. A thread sealant must always be used to achieve a leak free seal (except for NPTF).
Specification of ASME B16.11 Threaded Nipple
Diameter | 1/8″, 1/4″, 3/8″, 1/2″, 3/4″, 1″, 1 1/4″, 1 1/2″, 2″, 2 1/2″, 3″, 4″ |
Thickness | STD, SCH 40, SCH 80, SCH 160, XXS |
End Type | TBE, TOE, Male, Female |
Thread Type | NPT, BSPP, BSPT, PF, PT |
Surface | Anti-rust Oil, Galvanized or PE Coated. |
ASTM A105, A694 F52, F60, F65, F70, A350 LF2, LF3 | |
Alloy Steel: | ASTM A182 F1, F5, F9, F11, F12, F22, F91 |
Stainless Steel: | ASTM A182 F304/304L, F304H, F316/316L, F310, F317, F321 |
Duplex Steel: | ASTM A182 F51, F53, F55, F60 |
ASTM A733 Threaded Pipe Nipple Dimensions
| Nominal Size | OD of Pipes | Lengths of Thread | Wall of pipes | Pipe Nipple Lengths | |||
| DN | NPS | OD | L 2 min | T | L | ||
| Ⅰ | Ⅱ | Ⅲ | |||||
| 6 | 1/8 | 10.3 | 6.7 | STD,XS Sch40,Sch80 | 50 | 75 | 100 |
| 8 | 1/4 | 13.7 | 10.2 | ||||
| 10 | 3/8 | 17.1 | 10.4 | ||||
| 15 | 1/2 | 21.3 | 13.6 | STD,XS Sch40,Sch80 | 50 | 75 | 100 |
| 50 | 3/4 | 26.7 | 13.9 | ||||
| 25 | 1 | 33.4 | 17.3 | ||||
| 32 | 11/4 | 42.2 | 18.0 | STD,XS Sch40,Sch80 | 75 | 100 | 150 |
| 40 | 11/2 | 48.3 | 18.4 | ||||
| 50 | 2 | 60.3 | 19.2 | ||||
| 65 | 21/2 | 73.0 | 28.9 | STD,XS Sch40,Sch80 | 100 | 150 | 200 |
| 80 | 3 | 88.9 | 30.5 | ||||
| 90 | 31/2 | 101.6 | 31.8 | ||||
| 100 | 4 | 114.3 | 33.0 | STD,XS Sch40,Sch80 | 100 | 150 | 200 |
| 125 | 5 | 141.3 | 35.7 | ||||
| 150 | 6 | 168.3 | 38.4 | ||||
| 200 | 8 | 219.1 | 43.5 | STD,XS Sch40,Sch80 | 150 | 200 | 250 |
| 250 | 10 | 273.0 | 48.9 | ||||
| 300 | 12 | 323.8 | 54.0 | ||||
DN | NPS | SCH80 | SCH160 |
6 | 1/8 | 0.02 | 0.02 |
8 | 1/4 | 0.03 | 0.04 |
10 | 3/8 | 0.05 | 0.06 |
15 | 1/2 | 0.1 | 0.12 |
20 | 3/4 | 0.13 | 0.17 |
25 | 1 | 0.22 | 0.29 |
32 | 1 1/4 | 0.34 | 0.41 |
40 | 1 1/2 | 0.47 | 0.58 |
50 | 2 | 0.69 | 0.91 |
65 | 2 1/2 | 1.35 | 1.69 |
80 | 3 | 2.03 | 2.55 |
What are the types of Threaded Nipple?
TOE Threaded Nipple
The TOE threaded nipple is threaded only on one end, and the other end is plain or socketed, which is used to connect pipes that need to be threaded on one end. This structure makes it have specific connection uses in pipeline systems. For example, when a device with an internal thread interface needs to be connected to a pipeline, the unthreaded end of the TOE threaded nipple can be welded to the pipeline or connected in other ways, while the threaded end is threaded with the internal thread interface of the equipment.
TBE Threaded Nipple
The TBE ASME B16.11 threaded nipple has threads at both ends, which can connect pipes or pipe fittings that need to be threaded at both ends. This makes it more flexible in pipeline connection. The TBE threaded nipple can be used directly to connect two pipes with external threads, or to connect a pipe with external threads and a device or pipe fitting with internal threads.
Advantage of Pipe Nipple
NPT threaded pipe nipple play an important role in both plumbing and industrial area. Since they are short lengths of pipe with specific end connections such as threaded both ends, threaded one end, etc., they extend or redirect the flow of a system (fluid and gas). The pipe nipple is designed to connect with other fittings or pipes and is available in several alloys, sizes and shapes.
Application
Chemical processing industries
Pharmaceutical
Shipbuilding/Marine
Machine building
Architectural
What is NPT Threaded Pipe Nipple
NPT threaded pipe nipple is a short piece of pipe usually with external/male threads in both ends or in one end for connecting two other pipes or fittings. The threads at two ends can be the same or different types, such as NPT thread.
In addition, NPT threaded pipe nipple is one of the most popular categories of pipe fittings, a combination of pipe nipples is recommended for low-pressure discharge and suction service for various compatible liquids and not for compressible products like air, nitrogen, or steam.
And the length of the nipple is usually specified by the total length of the threaded portion. Moreover, it may have a hexagonal section in the center for a wrench to grasp (which is called hex nipple), or it may simply make from a piece of straight pipe (which is called barrel nipple or pipe nipple). When the nipple ends are of two different sizes it is called a reducer or unequal nipple, and threads used on nipples are BSP, BSPT, NPT, NPSM, and Metric.
What is NPT Thread
NPT stands for National Pipe Thread and is an American standard thread. It may also be refered to as MPT , MNPT or NPT (M) for male external threads and FPT, FNPT or NPT(F) for female internal threads. A thread sealant must always be used to achieve a leak free seal (except for NPTF).
Specification of ASME B16.11 Threaded Nipple
Diameter | 1/8″, 1/4″, 3/8″, 1/2″, 3/4″, 1″, 1 1/4″, 1 1/2″, 2″, 2 1/2″, 3″, 4″ |
Thickness | STD, SCH 40, SCH 80, SCH 160, XXS |
End Type | TBE, TOE, Male, Female |
Thread Type | NPT, BSPP, BSPT, PF, PT |
Surface | Anti-rust Oil, Galvanized or PE Coated. |
ASTM A105, A694 F52, F60, F65, F70, A350 LF2, LF3 | |
Alloy Steel: | ASTM A182 F1, F5, F9, F11, F12, F22, F91 |
Stainless Steel: | ASTM A182 F304/304L, F304H, F316/316L, F310, F317, F321 |
Duplex Steel: | ASTM A182 F51, F53, F55, F60 |
ASTM A733 Threaded Pipe Nipple Dimensions
| Nominal Size | OD of Pipes | Lengths of Thread | Wall of pipes | Pipe Nipple Lengths | |||
| DN | NPS | OD | L 2 min | T | L | ||
| Ⅰ | Ⅱ | Ⅲ | |||||
| 6 | 1/8 | 10.3 | 6.7 | STD,XS Sch40,Sch80 | 50 | 75 | 100 |
| 8 | 1/4 | 13.7 | 10.2 | ||||
| 10 | 3/8 | 17.1 | 10.4 | ||||
| 15 | 1/2 | 21.3 | 13.6 | STD,XS Sch40,Sch80 | 50 | 75 | 100 |
| 50 | 3/4 | 26.7 | 13.9 | ||||
| 25 | 1 | 33.4 | 17.3 | ||||
| 32 | 11/4 | 42.2 | 18.0 | STD,XS Sch40,Sch80 | 75 | 100 | 150 |
| 40 | 11/2 | 48.3 | 18.4 | ||||
| 50 | 2 | 60.3 | 19.2 | ||||
| 65 | 21/2 | 73.0 | 28.9 | STD,XS Sch40,Sch80 | 100 | 150 | 200 |
| 80 | 3 | 88.9 | 30.5 | ||||
| 90 | 31/2 | 101.6 | 31.8 | ||||
| 100 | 4 | 114.3 | 33.0 | STD,XS Sch40,Sch80 | 100 | 150 | 200 |
| 125 | 5 | 141.3 | 35.7 | ||||
| 150 | 6 | 168.3 | 38.4 | ||||
| 200 | 8 | 219.1 | 43.5 | STD,XS Sch40,Sch80 | 150 | 200 | 250 |
| 250 | 10 | 273.0 | 48.9 | ||||
| 300 | 12 | 323.8 | 54.0 | ||||
DN | NPS | SCH80 | SCH160 |
6 | 1/8 | 0.02 | 0.02 |
8 | 1/4 | 0.03 | 0.04 |
10 | 3/8 | 0.05 | 0.06 |
15 | 1/2 | 0.1 | 0.12 |
20 | 3/4 | 0.13 | 0.17 |
25 | 1 | 0.22 | 0.29 |
32 | 1 1/4 | 0.34 | 0.41 |
40 | 1 1/2 | 0.47 | 0.58 |
50 | 2 | 0.69 | 0.91 |
65 | 2 1/2 | 1.35 | 1.69 |
80 | 3 | 2.03 | 2.55 |
What are the types of Threaded Nipple?
TOE Threaded Nipple
The TOE threaded nipple is threaded only on one end, and the other end is plain or socketed, which is used to connect pipes that need to be threaded on one end. This structure makes it have specific connection uses in pipeline systems. For example, when a device with an internal thread interface needs to be connected to a pipeline, the unthreaded end of the TOE threaded nipple can be welded to the pipeline or connected in other ways, while the threaded end is threaded with the internal thread interface of the equipment.
TBE Threaded Nipple
The TBE ASME B16.11 threaded nipple has threads at both ends, which can connect pipes or pipe fittings that need to be threaded at both ends. This makes it more flexible in pipeline connection. The TBE threaded nipple can be used directly to connect two pipes with external threads, or to connect a pipe with external threads and a device or pipe fitting with internal threads.
Advantage of Pipe Nipple
NPT threaded pipe nipple play an important role in both plumbing and industrial area. Since they are short lengths of pipe with specific end connections such as threaded both ends, threaded one end, etc., they extend or redirect the flow of a system (fluid and gas). The pipe nipple is designed to connect with other fittings or pipes and is available in several alloys, sizes and shapes.
Application
Chemical processing industries
Pharmaceutical
Shipbuilding/Marine
Machine building
Architectural
