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NPT A105 Bushing

 NPT A105 bushing is mainly used to connect two pipes of different diameters in the pipeline system or to correct the error in the pipeline installation. It is usually made of A105 carbon steel, has high strength and good corrosion resistance, and can withstand high working pressure.

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NPT A105 bushing is mainly used to connect two pipes of different diameters in the pipeline system or to correct the error in the pipeline installation. It is usually made of A105 carbon steel, has high strength and good corrosion resistance, and can withstand high working pressure.

In the petrochemical industry, reliable connections are required between various fluid delivery pipelines of different diameters. Carbon steel threaded core bushings can be used to connect oil pipes, gas pipes, etc. of different diameters. For example, in the production process of an oil refinery, from a large crude oil delivery pipeline to a small processing equipment feed pipeline, a core bushing may be required to adjust the pipe diameter.
In the compressed air pipeline system of a mechanical manufacturing workshop, when the pipe diameters of the pipes connecting different equipment are inconsistent, a carbon steel threaded core bushing is an economical and practical connecting pipe fitting.

Specification of ASME B16.11  Bushing

Size Range 1/8″, 1/4″, 3/8″, 1/2″, 3/4″, 1″, 1 1/4″, 1-1/2″, 2″, 2-1/2″, 3″, 4″
Pressure Rating Class 3000 / 6000lbs
Standard ASME B16.11, BS3799
Thread Type NPT, PT, BSPP, BSPT, PF
Carbon Steel Grades ASTM A105 / A105N, ASTM A350 LF2 / LF3
Alloy Steel Grades ASTM A182 F11 / 12 / 5 / 9 / 91 / 92 / 22
Stainless Steel Grades ASTM A182 F304/304L/304H, 316/316L, 310S, 317, 347, 904L, 321
Duplex Stainless Steel Grades ASTM A182 F51, F53, F44

Nominal Size Length Hex Height Hex Width Flats
DN NPS Amin Gmin Fnom
6 1/8 10 11
8 1/4 11 3 16
10 3/8 13 4 18
15 1/2 14 5 22
20 3/4 16 6 27
25 1 19 6 36
32 11/4 21 7 46
40 11/2 21 8 50
50 2 22 9 65
65 21/2 27 10 75
80 3 28 10 90
100 4 32 13 115

Forged Threaded Bushing Weight Chart in kg

DN NPS HEX HEAD BUSHING FLUSHING BUSHING
8 1/4 0.01 0.01
10 3/8 0.02 0.01
15 1/2 0.03 0.02
20 3/4 0.04 0.02
25 1 0.07 0.04
32 1-1/4 0.12 0.05
40 1-1/2 0.14 0.06
50 2 0.22 0.09
65 2-1/2 0.36 0.17
80 3 0.46 0.22
100 4 0.78 0.33

Advantages of NPT A105 Bushing

Flexible connection of pipes with different diameters

Bushings can effectively connect two pipes with different diameters. In the pipeline system, due to different functional requirements, flow requirements or layout restrictions, pipe diameter changes often occur.
Compared with other pipe diameter conversion methods, such as reducer clamps, bushings may be more flexible under some special pipe diameter conversion requirements. For example, when a non-standard pipe diameter needs to be converted to a standard pipe diameter, the bushing can meet this special requirement by customizing the thread specifications.

Space saving

The structure of the bushing is relatively compact. In some pipeline installation environments with limited space, such as small equipment rooms or compact building structures, the bushing can achieve pipe diameter conversion without taking up too much space. Compared with the use of larger-sized reducer pipe fittings, the compact structure of the bushing can better adapt to such space constraints, making the pipeline layout more reasonable and compact.

Easy installation

Bushings are usually connected by thread. This connection method does not require complex welding equipment and professional welding technicians. At the pipeline installation site, the installer only needs to use simple tools such as wrenches to screw the bushing into the corresponding pipe interface. For example, during the installation or maintenance of household plumbing pipes, ordinary users or maintenance personnel can easily install the core to solve the problem of pipe diameter mismatch.
Because the threaded connection is reversible, if the core is found to be installed in the wrong direction or needs to be adjusted during the installation process, it can also be easily removed and reinstalled, which provides great flexibility for adjustments during the pipeline installation process.

Easy to maintain and replace

During the long-term operation of the pipeline system, if the core is damaged (such as thread wear, internal corrosion, etc.), it is easy to replace it because it uses a threaded connection. Maintenance personnel can quickly remove the damaged core and replace it with a new core without large-scale disassembly of the entire pipeline system. This helps to reduce the time and cost of pipeline maintenance and improve the maintainability of the pipeline system.

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