A socket weld flange is a type of pipe connector that incorporates a socket into which a pipe is welded. The inclusion of a socket in the socket weld flange creates a connection that is much stronger than a comparable slip-on flange. The socket weld flange was designed to work on small size, high-pressure pipelines. This flange is very popular in chemical plants where a smooth-flowing connection is needed in all flange joints. The benefit of a flanged connection is that the pipe can be easily disconnected at the flange and reassembled just as easily.

When using a slip-on flange, the pipe must be beveled to allow a weld to be placed on the inside of the flange as well as the outside. This inner weld requires grinding to create a smooth-flowing connection. By using a socket weld flange, this grinding is not required to achieve a smooth flow of liquid through the connection. The socket is designed to have an inner lip that is the same width as the intended pipe to be inserted into the flange. This allows the pipe to be exactly lined up with the lip of the socket inside of the flange when the unit is assembled, creating a smooth transition inside the flange.

Why Socket Weld Flanges?
Socket Weld Flange is socketed with plain end pipe & twin welded with the flange cavity allowing high pressure flow without any unaccounted stress over the pipeline wall. Socket Weld Flange is twin welded, one at the hub end & other at the junction of the pipe’s plain end & bore cavity. Socket Weld Flanges are designed for used with smaller size pipelines with high pressure ratings.

Manufacturing Socket Weld Flange
Socket Weld Flange is forged from billet, bar stock or heavy plate to primary form & then machined to size with intricate machining to form the special socket-weld bore. Socket Weld Flanges can be directly machined from Forging Stock or Plate, if acceptable for the application.

Material for Socket Weld Flange
Socket Weld Flanges are manufactured in almost all known ferrous & non-ferrous alloys.
Carbon Steel
A105 / A105N / A181 / A350 LF2 / LF3 / LF6 / A694 F52 / F60 / F65 / F70 .
Chrome Moly Steel
A182 F5  /  F9  /  F11  /  F12 /  F22  /  F91  /  F92 .
Stainless Steel
304 / 304L / 304H / 309 / 309S / 310 / 310S / 316 / 316L / 316H / 316Ti / 317 / 317L / 321 / 321H / 347 / 347H / 348 / 348H .
Duplex Steel
S31803 / F51 /  S32205 / F60 / 1.4462 .
Super Duplex
S32750 / F53 / 1.4410 /  S32760 / F55  / 1.4501 .
Nickel
N02200  /  N02201
Inconel
600 ( N06600 ) / 601 ( N06601 ) / 625( N06625 ) / 718( N07718 ) / 800 ( N08800 ) / 800H ( N08810 ) / 800HT ( N08811 ) .
Monel
Monel 400 (UNS N04400) / Monel 400 (Din N2.4360) / Monel K500 (UNS N0550) / Monel K500(Din 2.4375) .
Hastelloy
B2 ( N010665 ) / C22 ( N06022 ) / C276 ( N10276 ) / C200 ( N06200 ) / X ( N06002 ) .
Nimonic
Nimonic 80a / Nimonic 90 / Nimonic 263 .
Titanium
Grade 1  /  Grade 2  /  Grade 4  /  Grade 5  /  Grade 7  /  Grade 9  /  Grade 12 .
Tantalum
R05200  /  R05252  /  R05255 /  R5400 .
Zirconium
R60702 /  R60705 .
Aluminum
Alloy 5022  /  Alloy 5083  /  Alloy 5086  /  Alloy 6061   /  Alloy 6066 .
Copper Nickel
C71500 (70:30) / C70600 (90:10)

Applications of Socket Weld Flange

Socket Weld Flanges are used for smaller sized pipelines with high pressure ratings confined to High Pressure Fuel Transportation, Oil & Gas Transportation Pipelines, High Pressure Steam & Air Pipelines,  Heavy Fabrication & similar Industries.

Dimensions Socket Weld Flange, ANSI CLASS 150, ASME B16.5, 1/16″ RAISED FACE (IN) DATASHEET

This datasheet is for flanges that have a Raised Face end connection.  Additional in depth information about these kinds of flanges can be found on the Raised Face Flange page.

  • Dimensions to ASME B16.5 – Pipe Flanges and Flanged Fittings: NPS 1/2 through NPS 24 Metric/Inch Standard
  • Bolt circle diameters are 1/8 inch larger than bolt diameter.

data socf b16.5 150 300data sof b16.5

Pipe Size

(NPS)

Outside Diameter of Flange

A

Diameter of Raised Face

B

Thickness of Flange

C

Diameter of Bore

D

Diameter of Bore

E

Depth of Socket

G

Diameter of Hub at Base

J

Length of Hub

L

Number of Bolt Holes

 

Diameter of Bolt Holes

 

Bolt Circle Diameter

P

Approx. Weight

(Lbs.)

1/2 3 1/2 1 3/8 7/16 0.62 0.88 3/8 1 3/16 5/8 4 5/8 2 3/8 2
3/4 3 7/8 1 11/16 1/2 0.82 1.09 7/16 1 1/2 5/8 4 5/8 2 3/4 2
1 4 1/4 2 9/16 1.05 1.36 1/2 1 15/16 11/16 4 5/8 3 1/8 2
1 1/4 4 5/8 2 1/2 5/8 1.38 1.70 9/16 2 5/16 13/16 4 5/8 3 1/2 3
1 1/2 5 2 7/8 11/16 1.61 1.95 5/8 2 9/16 7/8 4 5/8 3 7/8 3
2 6 3 5/8 3/4 2.07 2.44 11/16 3 1/16 1 4 3/4 4 3/4 5
2 1/2 7 4 1/8 7/8 2.47 2.94 3/4 3 9/16 1 1/8 4 3/4 5 1/2 7
3 7 1/2 5 15/16 3.07 3.57 13/16 4 1/4 1 3/16 4 3/4 6 8
3 1/2 8 1/2 5 1/2 15/16 3.55 4.07 7/8 4 13/16 1 1/4 8 3/4 7 11
4 9 6 3/16 15/16 4.03 4.57 15/16 5 5/16 1 5/16 8 3/4 7 1/2 13
5 10 7 5/16 15/16 5.05 5.66 15/16 6 7/16 1 7/16 8 7/8 8 1/2 15
6 11 8 1/2 1 6.07 6.72 1 1/16 7 9/16 1 9/16 8 7/8 9 1/2 19
8 13 1/2 10 5/8 1 1/8 7.98 8.72 1 1/4 9 11/16 1 3/4 8 7/8 11 3/4 30
10 16 12 3/4 1 3/16 10.02 10.88 1 5/16 12 1 15/16 12 1 14 1/4 43
12 19 15 1 1/4 12.00 12.88 1 9/16 14 3/8 2 3/16 12 1 17 64
14 21 16 1/4 1 3/8 13.25 14.14 1 5/8 15 3/4 2 1/4 12 1 1/8 18 3/4 85
16 23 1/2 18 1/2 1 7/16 15.25 16.16 1 3/4 18 2 1/2 16 1 1/8 21 1/4 93
18 25 21 1 9/16 17.25 18.18 1 15/16 19 7/8 2 11/16 16 1 1/4 22 3/4 120
20 27 1/2 23 1 11/16 19.25 20.20 2 1/8 22 2 7/8 20 1 1/4 25 155
22 29 1/2 25 1/4 1 13/16 21.25 22.22 2 3/8 24 3 1/8 20 1 3/8 27 1/4 185
24 32 27 1/4 1 7/8 23.25 24.25 2 1/2 26 1/8 3 1/4 20 1 3/8 29 1/2 210

Dimensions Socket Weld Flange, ANSI CLASS 300, ASME B16.5, 1/16″ RAISED FACE (IN) DATASHEET

This datasheet is for flanges that have a Raised Face end connection.  Additional in depth information about these kinds of flanges can be found on the Raised Face Flange page.

  • Dimensions to ASME B16.5 – Pipe Flanges and Flanged Fittings: NPS 1/2 through NPS 24 Metric/Inch Standard
  • Bolt circle diameters are 1/8 inch larger than bolt diameter.

data socf b16.5 150 300data sof b16.5

Pipe Size

(NPS)

Outside Diameter of Flange

A

Diameter of Raised Face

B

Thickness of Flange

C

Diameter of Bore

D

Diameter of Bore

E

Depth of Socket

G

Diameter of Hub at Base

J

Length of Hub

L

Number of Bolt Holes

 

Diameter of Bolt Holes

 

Bolt Circle Diameter

P

Approx. Weight

(Lbs.)

1/2 3 3/4 1 3/8 9/16 0.62 0.88 3/8 1 1/2 7/8 4 5/8 2 5/8 3
3/4 4 5/8 1 11/16 5/8 0.82 1.09 7/16 1 7/8 1 4 3/4 3 1/4 3
1 4 7/8 2 11/16 1.05 1.36 1/2 2 1/8 1 1/16 4 3/4 3 1/2 3
1 1/4 5 1/4 2 1/2 3/4 1.38 1.70 9/16 2 1/2 1 1/16 4 3/4 3 7/8 4
1 1/2 6 1/8 2 7/8 13/16 1.61 1.95 5/8 2 3/4 1 3/16 4 7/8 4 1/2 6
2 6 1/2 3 5/8 7/8 2.07 2.44 11/16 3 5/16 1 5/16 8 3/4 5 7
2 1/2 7 1/2 4 1/8 1 2.47 2.94 3/4 3 15/16 1 1/2 8 7/8 5 7/8 10
3 8 1/4 5 1 1/8 3.07 3.57 13/16 4 5/8 1 11/16 8 7/8 6 5/8 13
3 1/2 9 5 1/2 1 3/16 3.55 4.07 7/8 5 1/4 1 3/4 8 7/8 7 1/4 17
4 10 6 3/16 1 1/4 4.03 4.57 15/16 5 3/4 1 7/8 8 7/8 7 7/8 22

Dimensions Socket Weld Flange, ANSI CLASS 400, ASME B16.5, 1/16″ RAISED FACE (IN) DATASHEET

This datasheet is for flanges that have a Raised Face end connection.  Additional in depth information about these kinds of flanges can be found on the Raised Face Flange page.

  • Dimensions to ASME B16.5 – Pipe Flanges and Flanged Fittings: NPS 1/2 through NPS 24 Metric/Inch Standard
  • Bolt circle diameters are 1/8 inch larger than bolt diameter.

data socf b16.5 400 2500data sof b16.5

Pipe Size

(NPS)

Outside Diameter of Flange

A

Diameter of Raised Face

B

Thickness of Flange

C

Diameter of Bore

D

Diameter of Bore

E

Depth of Socket

G

Diameter of Hub at Base

J

Length of Hub

L

Number of Bolt Holes

 

Diameter of Bolt Holes

 

Bolt Circle Diameter

P

Approx. Weight

(Lbs.)

1/2 3 3/4 1 3/8 9/16 0.55 0.88 3/8 1 1/2 7/8 4 5/8 2 5/8 3
3/4 4 5/8 1 11/16 5/8 0.74 1.09 7/16 1 7/8 1 4 3/4 3 1/4 3
1 4 7/8 2 11/16 0.92 1.36 1/2 2 1/8 1 1/16 4 3/4 3 1/2 4
1 1/4 5 1/4 2 1/2 13/16 1.28 1.70 9/16 2 1/2 1 1/8 4 3/4 3 7/8 6
1 1/2 6 1/8 2 7/8 7/8 1.50 1.95 5/8 2 3/4 1 1/4 4 7/8 4 1/2 7
2 6 1/2 3 5/8 1 1.94 2.44 11/16 3 5/16 1 7/16 8 3/4 5 9
2 1/2 7 1/2 4 1/8 1 1/8 2.32 2.94 3/4 3 15/16 1 5/8 8 7/8 5 7/8 13
3 8 1/4 5 1 1/4 2.90 3.57 13/16 4 5/8 1 13/16 8 7/8 6 5/8 16
3 1/2 9 5 1/2 1 3/8 3.36 4.07 7/8 5 1/4 1 15/16 8 1 7 1/4 21
4 10 6 3/16 1 3/8 3.83 4.57 15/16 5 3/4 2 8 1 7 7/8 26

Dimensions Socket Weld Flange, ANSI CLASS 600, ASME B16.5, 1/16″ RAISED FACE (IN) DATASHEET

This datasheet is for flanges that have a Raised Face end connection.  Additional in depth information about these kinds of flanges can be found on the Raised Face Flange page.

  • Dimensions to ASME B16.5 – Pipe Flanges and Flanged Fittings: NPS 1/2 through NPS 24 Metric/Inch Standard
  • Bolt circle diameters are 1/8 inch larger than bolt diameter.

data socf b16.5 400 2500data sof b16.5

Pipe Size

(NPS)

Outside Diameter of Flange

A

Diameter of Raised Face

B

Thickness of Flange

C

Diameter of Bore

D

Diameter of Bore

E

Depth of Socket

G

Diameter of Hub at Base

J

Length of Hub

L

Number of Bolt Holes

 

Diameter of Bolt Holes

 

Bolt Circle Diameter

P

Approx. Weight

(Lbs.)

1/2 3 3/4 1 3/8 9/16 0.55 0.88 3/8 1 1/2 7/8 4 5/8 2 5/8 3
3/4 4 5/8 1 11/16 5/8 0.74 1.09 7/16 1 7/8 1 4 3/4 3 1/4 3
1 4 7/8 2 11/16 0.92 1.36 1/2 2 1/8 1 1/16 4 3/4 3 1/2 4
1 1/4 5 1/4 2 1/2 13/16 1.28 1.70 9/16 2 1/2 1 1/8 4 3/4 3 7/8 6
1 1/2 6 1/8 2 7/8 7/8 1.50 1.95 5/8 2 3/4 1 1/4 4 7/8 4 1/2 7
2 6 1/2 3 5/8 1 1.94 2.44 11/16 3 5/16 1 7/16 8 3/4 5 9
2 1/2 7 1/2 4 1/8 1 1/8 2.32 2.94 3/4 3 15/16 1 5/8 8 7/8 5 7/8 13
3 8 1/4 5 1 1/4 2.90 3.57 13/16 4 5/8 1 13/16 8 7/8 6 5/8 16
3 1/2 9 5 1/2 1 3/8 3.36 4.07 7/8 5 1/4 1 15/16 8 1 7 1/4 21

Dimensions Socket Weld Flange, ANSI CLASS 900, ASME B16.5, 1/16″ RAISED FACE (IN) DATASHEET

  • Dimensions to ASME B16.5 – Pipe Flanges and Flanged Fittings: NPS 1/2 through NPS 24 Metric/Inch Standard
  • Bolt circle diameters are 1/8 inch larger than bolt diameter.

data socf b16.5 400 2500data sof b16.5

Pipe Size

(NPS)

Outside Diameter of Flange

A

Diameter of Raised Face

B

Thickness of Flange

C

Diameter of Bore

D

Diameter of Bore

E

Depth of Socket

G

Diameter of Hub at Base

J

Length of Hub

L

Number of Bolt Holes

 

Diameter of Bolt Holes

 

Bolt Circle Diameter

P

Approx. Weight

(Lbs.)

1/2 4 3/4 1 3/8 7/8 *1 0.88 3/8 1 1/2 1 1/4 4 7/8 3 1/4 9
3/4 5 1/8 1 11/16 1 *1 1.09 7/16 1 3/4 1 3/8 4 7/8 3 1/2 9
1 5 7/8 2 1 1/8 *1 1.36 1/2 2 1/16 1 5/8 4 1 4 9
1 1/4 6 1/4 2 1/2 1 1/8 *1 1.70 9/16 2 1/2 1 5/8 4 1 4 3/8 10
1 1/2 7 2 7/8 1 1/4 *1 1.95 5/8 2 3/4 1 3/4 4 1 1/8 4 7/8 14
2 8 1/2 3 5/8 1 1/2 *1 2.44 11/16 4 1/8 2 1/4 8 1 6 1/2 25
2 1/2 9 5/8 4 1/8 1 5/8 *1 2.94 3/4 4 7/8 2 1/2 8 1 1/8 7 1/2 36
3 9 1/2 5 1 1/2 *1 3.57 5 2 1/8 8 1 7 1/2 31

Dimensions Socket Weld Flange, ANSI CLASS 1500, ASME B16.5, 1/16″ RAISED FACE (IN) DATASHEET

This datasheet is for flanges that have a Raised Face end connection.  Additional in depth information about these kinds of flanges can be found on the Raised Face Flange page.

  • Dimensions to ASME B16.5 – Pipe Flanges and Flanged Fittings: NPS 1/2 through NPS 24 Metric/Inch Standard
  • Bolt circle diameters are 1/8 inch larger than bolt diameter.

data socf b16.5 400 2500data sof b16.5

Pipe Size

(NPS)

Outside Diameter of Flange

A

Diameter of Raised Face

B

Thickness of Flange

C

Diameter of Bore

D

Diameter of Bore

E

Depth of Socket

G

Diameter of Hub at Base

J

Length of Hub

L

Number of Bolt Holes

 

Diameter of Bolt Holes

 

Bolt Circle Diameter

P

Approx. Weight

(Lbs.)

1/2 4 3/4 1 3/8 7/8 *1 0.88 3/8 1 1/2 1 1/4 4 7/8 3 1/4 9 1/2
3/4 5 1/8 1 11/16 1 *1 1.09 7/16 1 3/4 1 3/8 4 7/8 3 1/2 9 3/4
1 5 7/8 2 1 1/8 *1 1.36 1/2 2 1/16 1 5/8 4 1 4 9
1 1/4 6 1/4 2 1/2 1 1/8 *1 1.70 9/16 2 1/2 1 5/8 4 1 4 3/8 10
1 1/2 7 2 7/8 1 1/4 *1 1.95 5/8 2 3/4 1 3/4 4 1 1/8 4 7/8 14
2 8 1/2 3 5/8 1 1/2 *1 2.44 11/16 4 1/8 2 1/4 8 1 6 1/2 25
2 1/2 9 5/8 4 1/8 1 5/8 *1 2.94 3/4 4 7/8 2 1/2 8 1 1/8 7 1/2 36

Dimensions Socket Weld Flange, ANSI CLASS 1500, ASME B16.5, 1/16″ RAISED FACE (IN) DATASHEET

This datasheet is for flanges that have a Raised Face end connection.  Additional in depth information about these kinds of flanges can be found on the Raised Face Flange page.

  • Dimensions to ASME B16.5 – Pipe Flanges and Flanged Fittings: NPS 1/2 through NPS 24 Metric/Inch Standard
  • Bolt circle diameters are 1/8 inch larger than bolt diameter.

data socf b16.5 400 2500data sof b16.5

Pipe Size

(NPS)

Outside Diameter of Flange

A

Diameter of Raised Face

B

Thickness of Flange

C

Diameter of Bore

D

Diameter of Bore

E

Depth of Socket

G

Diameter of Hub at Base

J

Length of Hub

L

Number of Bolt Holes

 

Diameter of Bolt Holes

 

Bolt Circle Diameter

P

Approx. Weight

(Lbs.)

1/2 4 3/4 1 3/8 7/8 *1 0.88 3/8 1 1/2 1 1/4 4 7/8 3 1/4 9 1/2
3/4 5 1/8 1 11/16 1 *1 1.09 7/16 1 3/4 1 3/8 4 7/8 3 1/2 9 3/4
1 5 7/8 2 1 1/8 *1 1.36 1/2 2 1/16 1 5/8 4 1 4 9
1 1/4 6 1/4 2 1/2 1 1/8 *1 1.70 9/16 2 1/2 1 5/8 4 1 4 3/8 10
1 1/2 7 2 7/8 1 1/4 *1 1.95 5/8 2 3/4 1 3/4 4 1 1/8 4 7/8 14
2 8 1/2 3 5/8 1 1/2 *1 2.44 11/16 4 1/8 2 1/4 8 1 6 1/2 25
2 1/2 9 5/8 4 1/8 1 5/8 *1 2.94 3/4 4 7/8 2 1/2 8 1 1/8 7 1/2 36

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