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ASME B16.11 Socket Weld Pipe Fittings

Socket weld pipe fittings are pipe connectors made of round steel or steel ingots after forging and then lathe machining. The main connection form is socket welding (SW), which is to insert the steel pipe into the socket hole for welding.

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Socket weld pipe fittings are pipe connectors made of round steel or steel ingots after forging and then lathe machining. The main connection form is socket welding (SW), which is to insert the steel pipe into the socket hole for welding.

 

There are many varieties of socket fittings, including but not limited to 45° elbows, 90° elbows, tees, crosses, full coupling, half coupling, caps, unions, outlets, etc. The raw materials for making these pipe fittings are generally carbon steel, stainless steel, alloy steel, etc. Pipe fittings of different materials are suitable for different working environments and pressure levels.

 

Socket weld pipe fittings are widely used in various industries, such as petroleum, chemical, pharmaceutical, water treatment and other industrial fields, as well as pipe connections in buildings and other structures.

 

ASME B16.11 Socket Weld Pipe Fittings Specification

 

Type Elbow, Tee, Cross, Coupling, Cap, Lateral
Size Range 1/8″- 4″ / DN6 – DN100
Pressure Rating Class 3000LBS, 6000Lbs, 9000lbs.
Carbon Steel ASTM A105 / A105N, ASTM A350 LF2, A694 F42 / 46 / 56 / 60 / 65
Alloy Steel ASTM A182 F11 / 12 / 22 / 5 / 9 / 91 / 92 / 22
Stainless Steel ASTM A182 F304 / 304L / 304H, 316 / 316L, 321, 310S, 317, 347, 904L
Duplex Stainless Steel ASTM A182 F51, F53, F44

 

Tolerance for Socket Weld Pipe Fittings

 

TOLERANCES FOR SW FITTINGS
Nominal Size All Fittings Elbows,
Tees &
Crosses
Couplings Half-
Couplings
Reducer Inserts Unions
Socket
Bore Dia.
Bore Dia. of
Fittings
Center to
Bottom of
Socket
Laying
Lengths
Laying
Lengths
Laying
Length
Shank Dia. Length Laying
Length
DN NPS B D A H E F A SD SL E
6~8 1/8~1/4 +0.4
0
+1.5
0
 

±1.0

 

±1.5

 

±1.0

+1.5
0
 

±0.25

0
-1.5
 

±1.5

10~20 3/8~3/4 +0.4
0
+1.5
0
 

±1.5

 

±3.0

 

±1.5

+1.5
0
 

±0.25

0
-1.5
 

±3.0

25~40 1~11/2 +0.4
0
+1.5
0
 

±2.0

 

±4.0

 

±2.0

+2.0
0
 

±0.25

0
-2.0
 

±4.0

50 2 +0.5
0
+1.5
0
 

±2.0

 

±4.0

 

±2.0

+2.0
0
 

±0.5

0
-2.0
 

±4.0

65~80 21/2~3 +0.5
0
+3.0
0
± 2.5  

±5.0

 

±2.5

+2.5
0
 

±0.5

0
-2.5
 

±5.0

100 4 +0.5
0
+3.0
0
 

±2.5

 

±5.0

 

±2.5

+2.5
0
 

±0.7

0
-2.5

 

ASME B16.11 SW Pipe Fittings Structural features

 

Good sealing performance: Sealing materials such as rubber sealing rings, sealants, etc. are usually used to seal the socket weld pipe fittings. This sealing structure can effectively prevent the leakage of the medium in the pipeline and ensure the sealing of the pipeline system.

 

Easy installation: The connection method of the socket weld pipe fittings is relatively simple and does not require complex welding or thread processing equipment. During the installation process, you only need to insert the pipe into the socket and then fix it in a certain way, which greatly saves installation time and cost.

 

Strong removability: Compared with welded pipe fittings, ASME B16.11 socket weld pipe fittings have better removability. When the pipeline system needs to be repaired, replaced or modified, the spigot fittings can be easily disassembled without causing significant damage to the pipeline.

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