ANSI/ASME B16.5 Long Weld Neck Flange Dimensions

Long weld neck flange (LWN flange) is also call integral flange, it means a welding neck flange has a very long neck. Commonly, the welding neck flange has a tapered neck and a bevel end which is going to butt welding with the matching pipe. But the long weld neck flange, has a straight short pipe as the neck of a long weld neck flange. Long weld neck flange (LWN flange), is used for high pressure situations, integral hub weld neck flanges are used and for very high pressure cases Long Welding Neck flanges are preferred. In this case, the weld are far from the ring to avoid bending stresses and weld stress being combined.

NW Long Weld Neck Flanges 3 - ANSI/ASME B16.5 Long Weld Neck Flange Dimensions

The Long Weld Neck Flanges are the best designed butt-welded flange of those currently available becuase of its inherent structural value. It is expensive because of the design.

LONG WELD NECK FLANGES

three pcs NW long weld neck flanges - ANSI/ASME B16.5 Long Weld Neck Flange Dimensions

Long welding neck flange, lwn flanges are similar to a standard Welding Neck flanges, but the “Neck” is considerably longer than other flanges. LWN flange is often used as a nozzle for a barrel or column. In addition, there are the type LWN Heavy Barrel (HB) and the Equal LWN Barrel (E); they have a different shape and a thicker “Wall”.

The long weld neck flange should be butt welded with the pipes, it means the neck dimensions is same with the matching pipe, same diameter and wall thickness , commonly the long weld has a plain end, not a bevel end for welding . Except the neck, the LWN flange has a same dimensions with the welding neck flange. In addition, there are also the type LWN Heavy Barrel (HB) and the Equal LWN Barrel (E); they have a different shape and a thicker “Wall” which name is Nozzle.

NW Long Weld Neck Flange draw - ANSI/ASME B16.5 Long Weld Neck Flange Dimensions

Tube OD sizes: 3/8 to 2 inches

The Long Weld Neck Flange is normally referred to as the high hub flange. It is designed to transfer stresses to the pipe, thereby reducing high stress concentrations at the base of the flange.

The Long Weld Neck Flange is the best designed butt-welded flange of those currently available becuase of its inherent structural value. It is expensive because of the design.

Materials:

  • Carbon steel: A105,SS400,SF440 RST37.2,S235JRG2,P250GH,C22.8
  • Stainless Steel: F304 F304L F316 F316L 316Ti, Copper etc.

Vacuum range

  • Elastomer seal: >=1 x 10^-8 Torr – High vacuum
  • EVAC metal seal: >=1 x 10^-11 Torr – UHV

Temperature range

  • Viton: -20°C to 200°C
  • Silicone: -50°C to 230°C
  • Buna: -30°C to 110°C
  • EVAC metal seal: -270°C to 150°C

Uses of long weld neck flanges

LWN flanges are largely used in the petroleum and chemical industries but can also be used in residential and commercial buildings where fluctuating temperatures and high stress are expected, such as a main water or gas source. Long neck steel flanges are used under conditions where line or pipe expansion creates bending or repeated changes in the pipe. Because a long neck flange is used in pressurized applications, the flange may have additional pressure connections and may be referred to as an orifice flange. The flange supports free product flow when bored to match the diameter of the pipe it will receive. Long weld neck flanges are attached using V-shaped welds known as butt welds.

20180320115552 47785 - ANSI/ASME B16.5 Long Weld Neck Flange Dimensions

Long Weld Neck Flange Dimensions & Approximate Masses

20190216023522 29556 - ANSI/ASME B16.5 Long Weld Neck Flange Dimensions

FLANGE – LONG WELD NECK, ANSI CLASS 150, ASME B16.5, 1/16″ RAISED FACE (IN)

  • 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.
  • Connection complies with ASME BPVC Section II, Section VIII Division 1 and ASTM A105.
  • Angle “AA” is 30° per Section VIII Division 1.
  • Angle “AA” is 45° per Section VIII Division 2.

20190216023929 73027 - ANSI/ASME B16.5 Long Weld Neck Flange Dimensions

Pipe Size

(NPS)

Outside

Diameter

of

Flange

A

Diameter

of

Raised

Face

B

Thickness

of

Flange


C

Diameter

of

Bore


D

Diameter

of Hub

at Base


J

Length

of

Hub


K

Nunber

of

Bolt

Holes

Diamete

of

Bolt

Holes

Bolt

Circle

Diameter


P

Approx.

Weight

1/2 3 1/2 1 3/8 7/16 0.50 1 1/4 9 4 5/8 2 3/8 3
3/4 3 7/8 1 11/16 1/2 0.75 1 5/8 9 4 5/8 2 3/4 5
1 4 1/4 2 9/16 1.00 2 9 4 5/8 3 1/8 8
1 1/4 4 5/8 2 1/2 5/8 1.25 2 3/8 9 4 5/8 3 1/2 10
1 1/2 5 2 7/8 11/16 1.50 2 5/8 9 4 5/8 3 7/8 12
2 6 3 5/8 3/4 2.00 3 1/4 9 4 3/4 4 3/4 16
2 1/2 7 4 1/8 7/8 2.50 3 3/4 9 4 3/4 5 1/2 21
3 7 1/2 5 15/16 3.00 4 1/4 9 4 3/4 6 24
3 1/2 8 1/2 5 1/2 15/16 3.60 4 7/8 9 8 3/4 7 31
4 9 6 3/16 15/16 4.00 5 1/2 12 8 3/4 7 1/2 47
5 10 7 5/16 15/16 5.00 6 1/2 12 8 7/8 8 1/2 57
6 11 8 1/2 1 6.00 7 3/4 12 8 7/8 9 1/2 77
8 13 1/2 10 5/8 1 1/8 8.00 9 3/4 12 8 7/8 11 3/4 103
10 16 12 3/4 1 3/16 10.00 12 12 12 1 14 1/4 150
12 19 15 1 1/4 12.00 14 3/8 12 12 1 17 215
14 21 16 1/4 1 3/8 14.00 16 12 12 1 1/8 18 3/4 221
16 23 1/2 18 1/2 1 7/16 16.00 18 12 16 1 1/8 21 1/4 254
18 25 21 1 9/16 18.00 20 12 16 1 1/4 22 3/4 276
20 27 1/2 23 1 11/16 20.00 22 12 20 1 1/4 25 324
22
24 32 27 1/4 1 7/8 24.00 26 1/4 12 20 1 3/8 29 1/2 439

FLANGE – LONG WELD NECK, ANSI CLASS 300, ASME B16.5, 1/16″ RAISED FACE (IN)

20190216023929 73027 - ANSI/ASME B16.5 Long Weld Neck Flange Dimensions

Pipe Size

(NPS)

Outside

Diameter

of

Flange

A

Diameter

of

Raised

Face

B

Thickness

of

Flange


C

Diameter

of

Bore


D

Diameter

of Hub

at Base


J

Length

of

Hub


K

Nunber

of

Bolt

Holes

Diamete

of

Bolt

Holes

Bolt

Circle

Diameter


P

Approx.

Weight

1/2 3 3/4 1 3/8 9/16 0.50 1 1/2 9 4 5/8 2 5/8 5
3/4 4 5/8 1 11/16 5/8 0.75 1 7/8 9 4 3/4 3 1/4 9
1 4 7/8 2 11/16 1.00 2 1/8 9 4 3/4 3 1/2 10
1 1/4 5 1/4 2 1/2 3/4 1.25 2 1/2 9 4 3/4 3 7/8 14
1 1/2 6 1/8 2 7/8 13/16 1.50 2 3/4 9 4 7/8 4 1/2 17
2 6 1/2 3 5/8 7/8 2.00 3 1/4 9 8 3/4 5 19
2 1/2 7 1/2 4 1/8 1 2.50 3 15/16 9 8 7/8 5 7/8 28
3 8 1/4 5 1 1/8 3.00 4 5/8 9 8 7/8 6 5/8 36
3 1/2 9 5 1/2 1 3/16 3.50 5 1/4 9 8 7/8 7 1/4 45
4 10 6 3/16 1 1/4 4.00 5 3/4 12 8 7/8 7 7/8 54
5 11 7 5/16 1 3/8 5.00 7 12 8 7/8 9 1/4 86
6 12 1/2 8 1/2 1 7/16 6.00 8 1/8 12 12 7/8 10 5/8 108
8 15 10 5/8 1 5/8 8.00 10 1/4 12 12 1 13 150
10 17 1/2 12 3/4 1 7/8 10.00 12 5/8 12 16 1 1/8 15 1/4 218
12 20 1/2 15 2 12.00 14 3/4 12 16 1 1/4 17 3/4 289
14 23 16 1/4 2 1/8 14.00 16 3/4 12 20 1 1/4 20 1/4 342
16 25 1/2 18 1/2 2 1/4 16.00 19 12 20 1 3/8 22 1/2 426
18 28 21 2 3/8 18.00 21 12 24 1 3/8 24 3/4 493
20 30 1/2 23 2 1/2 20.00 23 1/8 12 24 1 3/8 27 575
22
24 36 27 1/4 2 3/4 24.00 27 5/8 12 24 1 5/8 32 823

FLANGE – LONG WELD NECK, ANSI CLASS 400, ASME B16.5, 1/4″ RAISED FACE (IN)

20190216024219 72793 - ANSI/ASME B16.5 Long Weld Neck Flange Dimensions

Pipe Size

(NPS)

Outside

Diameter

of

Flange

A

Diameter

of

Raised

Face

B

Thickness

of

Flange


C

Diameter

of

Bore


D

Diameter

of Hub

at Base


J

Length

of

Hub


K

Nunber

of

Bolt

Holes

Diamete

of

Bolt

Holes

Bolt

Circle

Diameter


P

Approx.

Weight

1/2 3 3/4 1 3/8 9/16 0.50 1 1/2 9 4 5/8 2 5/8 5
3/4 4 5/8 1 11/16 5/8 0.75 1 7/8 9 4 3/4 3 1/4 8
1 4 7/8 2 11/16 1.00 2 1/8 9 4 3/4 3 1/2 11
1 1/4 5 1/4 2 1/2 13/16 1.25 2 1/2 9 4 3/4 3 7/8 14
1 1/2 6 1/8 2 7/8 7/8 1.50 2 3/4 9 4 7/8 4 1/2 17
2 6 1/2 3 5/8 1 2.00 3 1/4 9 8 3/4 5 21
2 1/2 7 1/2 4 1/8 1 1/8 2.50 3 15/16 9 8 7/8 5 7/8 29
3 8 1/4 5 1 1/4 3.00 4 5/8 9 8 7/8 6 5/8 38
3 1/2 9 5 1/2 1 3/8 3.50 5 1/4 9 8 1 7 1/4 48
4 10 6 3/16 1 3/8 4.00 5 3/4 12 8 1 7 7/8 67
5 11 7 5/16 1 1/2 5.00 7 12 8 1 9 1/4 90
6 12 1/2 8 1/2 1 5/8 6.00 8 1/8 12 12 1 10 5/8 115
8 15 10 5/8 1 7/8 8.00 10 1/4 12 12 1 1/8 13 140
10 17 1/2 12 3/4 2 1/8 10.00 12 5/8 12 16 1 1/4 15 1/4 230
12 20 1/2 15 2 1/4 12.00 14 3/4 12 16 1 3/8 17 3/4 301
14 23 16 1/4 2 3/8 14.00 16 3/4 12 20 1 3/8 20 1/4 336
16 25 1/2 18 1/2 2 1/2 16.00 19 12 20 1 1/2 22 1/2 416
18 28 21 2 5/8 18.00 21 12 24 1 1/2 24 3/4 481
20 30 1/2 23 2 3/4 20.00 23 1/8 12 24 1 5/8 27 563
22
24 36 27 1/4 3 24.00 27 5/8 12 24 1 7/8 32 799

FLANGE – LONG WELD NECK, ANSI CLASS 600, ASME B16.5, 1/16″ RAISED FACE (IN)

20190216024219 72793 - ANSI/ASME B16.5 Long Weld Neck Flange Dimensions

Pipe Size

(NPS)

Outside

Diameter

of

Flange

A

Diameter

of

Raised

Face

B

Thickness

of

Flange


C

Diameter

of

Bore


D

Diameter

of Hub

at Base


J

Length

of

Hub


K

Nunber

of

Bolt

Holes

Diamete

of

Bolt

Holes

Bolt

Circle

Diameter


P

Approx.

Weight

1/2 3 3/4 1 3/8 9/16 0.50 1 1/2 9 4 5/8 2 5/8 5
3/4 4 5/8 1 11/16 5/8 0.75 1 7/8 9 4 3/4 3 1/4 8
1 4 7/8 2 11/16 1.00 2 1/8 9 4 3/4 3 1/2 11
1 1/4 5 1/4 2 1/2 13/16 1.25 2 1/2 9 4 3/4 3 7/8 14
1 1/2 6 1/8 2 7/8 7/8 1.50 2 3/4 9 4 7/8 4 1/2 17
2 6 1/2 3 5/8 1 2.00 3 1/4 9 8 3/4 5 21
2 1/2 7 1/2 4 1/8 1 1/8 2.50 3 15/16 9 8 7/8 5 7/8 29
3 8 1/4 5 1 1/4 3.00 4 5/8 9 8 7/8 6 5/8 38
3 1/2 9 5 1/2 1 3/8 3.50 5 1/4 9 8 1 7 1/4 48
4 10 3/4 6 3/16 1 1/2 4.00 6 12 8 1 8 1/2 80
5 13 7 5/16 1 3/4 5.00 7 1/2 12 8 1 1/8 10 1/2 128
6 14 8 1/2 1 7/8 6.00 8 3/4 12 12 1 1/8 11 1/2 158
8 16 1/2 10 5/8 2 3/16 8.00 10 3/4 12 12 1 1/4 13 3/4 215
10 20 12 3/4 2 1/2 10.00 13 1/2 12 16 1 3/8 17 324
12 22 15 2 5/8 12.00 15 3/4 12 20 1 3/8 19 1/4 500
14 23 3/4 16 1/4 2 3/4 14.00 17 16 20 1 1/2 20 3/4 417
16 27 18 1/2 3 16.00 19 1/2 16 20 1 5/8 23 3/4 564
18 29 1/4 21 3 1/4 18.00 21 1/2 16 20 1 3/4 25 3/4 654
20 32 23 3 1/2 20.00 24 16 24 1 3/4 28 1/2 840
22
24 37 27 1/4 4 24.00 28 1/4 16 24 2 33 1100

FLANGE – LONG WELD NECK, ANSI CLASS 900, ASME B16.5, 1/16″ RAISED FACE (IN)

20190216024219 72793 - ANSI/ASME B16.5 Long Weld Neck Flange Dimensions

Pipe Size

(NPS)

Outside

Diameter

of

Flange

A

Diameter

of

Raised

Face

B

Thickness

of

Flange


C

Diameter

of

Bore


D

Diameter

of Hub

at Base


J

Length

of

Hub


K

Nunber

of

Bolt

Holes

Diamete

of

Bolt

Holes

Bolt

Circle

Diameter


P

Approx.

Weight

1/2 4 3/4 1 3/8 7/8 0.50 1 9/16 9 4 7/8 3 1/4 8
3/4 5 1/8 1 11/16 1 0.75 1 13/16 9 4 7/8 3 1/2 10
1 5 7/8 2 1 1/8 1.00 2 1/16 9 4 1 4 15
1 1/4 6 1/4 2 1/2 1 1/8 1.25 2 1/2 9 4 1 4 3/8 18
1 1/2 7 2 7/8 1 1/4 1.50 2 3/4 9 4 1 1/8 4 7/8 23
2 8 1/2 3 5/8 1 1/2 2.00 4 1/8 9 8 1 6 1/2 44
2 1/2 9 5/8 4 1/8 1 5/8 2.50 4 7/8 12 8 1 1/8 7 1/2 72
3 9 1/2 5 1 1/2 3.00 5 12 8 1 7 1/2 65
3 1/2
4 11 1/2 6 3/16 1 3/4 4.00 6 1/4 12 8 1 1/4 9 1/4 98
5 13 3/4 7 5/16 2 5.00 7 1/2 12 8 1 3/8 11 143
6 15 8 1/2 2 3/16 6.00 9 1/4 12 12 1 1/4 12 1/2 199
8 18 1/2 10 5/8 2 1/2 8.00 11 3/4 12 12 1 1/2 15 1/2 310
10 21 1/2 12 3/4 2 3/4 10.00 14 1/2 12 16 1 1/2 18 1/2 385
12 24 15 3 1/8 12.00 16 1/2 12 20 1 1/2 21 667
14 25 1/4 16 1/4 3 3/8 14.00 17 3/4 16 20 1 5/8 22 558
16 27 3/4 18 1/2 3 1/2 16.00 20 16 20 1 3/4 24 1/4 670
18 31 21 4 18.00 22 1/4 16 20 2 27 949
20 33 3/4 23 4 1/4 20.00 24 1/2 16 20 2 1/8 29 1/2 1040
22
24 41 27 1/4 5 1/2 24.00 29 1/2 16 20 2 5/8 35 1/2 1775

FLANGE – LONG WELD NECK, ANSI CLASS 1500, ASME B16.5, 1/16″ RAISED FACE (IN)

20190216024219 72793 - ANSI/ASME B16.5 Long Weld Neck Flange Dimensions

Pipe Size

(NPS)

Outside

Diameter

of

Flange

A

Diameter

of

Raised

Face

B

Thickness

of

Flange


C

Diameter

of

Bore


D

Diameter

of Hub

at Base


J

Length

of

Hub


K

Nunber

of

Bolt

Holes

Diamete

of

Bolt

Holes

Bolt

Circle

Diameter


P

Approx.

Weight

1/2 4 3/4 1 3/8 7/8 0.50 1 9/16 9 4 7/8 3 1/4 10
3/4 5 1/8 1 11/16 1 0.75 1 13/16 9 4 7/8 3 1/2 13
1 5 7/8 2 1 1/8 1.00 2 1/16 9 4 1 4 15
1 1/4 6 1/4 2 1/2 1 1/8 1.25 2 1/2 9 4 1 4 3/8 18
1 1/2 7 2 7/8 1 1/4 1.50 2 3/4 9 4 1 1/8 4 7/8 23
2 8 1/2 3 5/8 1 1/2 2.00 4 1/8 9 8 1 6 1/2 44
2 1/2 9 5/8 4 1/8 1 5/8 2.50 4 7/8 9 8 1 1/8 7 1/2 72
3 10 1/2 5 1 7/8 3.00 5 1/4 9 8 1 1/4 8 84
3 1/2
4 12 1/4 6 3/16 2 1/8 4.00 6 3/8 12 8 1 3/8 9 1/2 118
5 14 3/4 7 5/16 2 7/8 5.00 7 3/4 12 8 1 5/8 11 1/2 195
6 15 1/2 8 1/2 3 1/4 6.00 9 12 12 1 1/2 12 1/2 235
8 19 10 5/8 3 5/8 8.00 11 1/2 12 12 1 3/4 15 1/2 366
10 23 12 3/4 4 1/4 10.00 14 1/2 12 12 2 19 610
12 26 1/2 15 4 7/8 12.00 17 3/4 16 16 2 1/8 22 1/2 1128
14 29 1/2 16 1/4 5 1/4 14.00 19 1/2 16 16 2 3/8 25 1030
16 32 1/2 18 1/2 5 3/4 16.00 21 3/4 16 16 2 5/8 27 3/4 1335
18 36 21 6 3/8 18.00 23 1/2 16 16 2 7/8 30 1/2 1750
20 38 3/4 23 7 20.00 25 1/4 16 16 3 1/8 32 3/4 2130
22
24 46 27 1/4 8 24.00 30 16 16 3 5/8 39 3180

FLANGE – LONG WELD NECK, ANSI CLASS 2500, ASME B16.5, 1/16″ RAISED FACE (IN)

20190216024219 72793 - ANSI/ASME B16.5 Long Weld Neck Flange Dimensions

Pipe Size

(NPS)

Outside

Diameter

of

Flange

A

Diameter

of

Raised

Face

B

Thickness

of

Flange


C

Diameter

of

Bore


D

Diameter

of Hub

at Base


J

Length

of

Hub


K

Nunber

of

Bolt

Holes

Diamete

of

Bolt

Holes

Bolt

Circle

Diameter


P

Approx.

Weight

1/2 5 1/4 1 3/8 1 3/16 0.50 1 13/16 9 4 7/8 3 1/2 11
3/4 5 1/2 1 11/16 1 1/4 0.75 2 1/16 9 4 7/8 3 3/4 13
1 6 1/4 2 1 3/8 1.00 2 1/4 9 4 1 4 1/4 20
1 1/4 7 1/4 2 1/2 1 1/2 1.25 2 7/8 9 4 1 1/8 5 1/8 30
1 1/2 8 2 7/8 1 3/4 1.50 3 1/8 9 4 1 1/4 5 3/4 38
2 9 1/4 3 5/8 2 2.00 3 3/4 9 8 1 1/8 6 3/4 55
2 1/2 10 1/2 4 1/8 2 1/4 2.50 4 1/2 9 8 1 1/4 7 3/4 85
3 12 5 2 5/8 3.00 5 1/4 9 8 1 3/8 9 125
3 1/2
4 14 6 3/16 3 4.00 6 1/2 12 8 1 5/8 10 3/4 185
5 16 1/2 7 5/16 3 5/8 5.00 8 12 8 1 7/8 12 3/4 300
6 19 8 1/2 4 1/4 6.00 9 1/4 12 8 2 1/8 14 1/2 450
8 21 3/4 10 5/8 5 8.00 12 16 12 2 1/8 17 1/4 600
10 26 1/2 12 3/4 6 1/2 10.00 14 3/4 16 12 2 5/8 21 1/4 1150
12 30 15 7 1/4 12.00 17 3/8 16 12 2 7/8 24 3/8 1560

FLANGE – HEAVY BARREL, ANSI CLASS 150, B16.5 (IN)

20190216025245 73132 - ANSI/ASME B16.5 Long Weld Neck Flange Dimensions

Pipe Size

(NPS)

Outside

Diameter

of

Flange

A

Diameter

of

Raised

Face

B

Thickness

of

Flange


C

Diameter

of

Bore


D

Diameter

of Hub

at Base


J

Length

of

Hub


K

Nut

Stop

Diameter


NS

Nut

Relief

Diameter


NR

Nut

Relief

Length


NL

Nunber

of

Bolt

Holes

Diamete

of

Bolt

Holes

Bolt

Circle

Diameter


P

Approx.

Weight

1/2 3 1/2 1 3/8 7/16 0.55 1 1/4 9 1 1/2 1 1/4 3/4 4 5/8 2 3/8 5
3/4 3 7/8 1 11/16 1/2 0.74 1 5/8 9 1 7/8 1 5/8 3/4 4 5/8 2 3/4 7
1 4 1/4 2 9/16 0.96 2 9 2 1/ 4 2 3/4 4 5/8 3 1/8 10
1 1/4 4 5/8 2 1/2 5/8 1.28 2 3/8 9 2 5/8 2 3/8 3/4 4 5/8 3 1/2 12
1 1/2 5 2 7/8 11/16 1.50 2 5/8 9 3 2 5/8 3/4 4 5/8 3 7/8 16
2 6 3 5/8 3/4 1.94 3 1/4 9 3 11/ 16 3 1/16 7/8 4 3/4 4 3/4 23
2 1/2 7 4 1/8 7/8 2.32 3 3/4 9 4 7/16 3 3/4 7/8 4 3/4 5 1/2 34
3 7 1/2 5 15/16 2.90 4 1/4 9 4 15/15 4 1/4 7/8 4 3/4 6 38
3 1/2 8 1/2 5 1/2 15/16 3.36 4 7/8 9 5 15/16 4 7/8 7/8 8 3/4 7 55
4 9 6 3/16 15/16 3.83 5 1/2 12 6 7/16 5 1/2 7/8 8 3/4 7 1/2 78
5 10 7 5/16 15/16 4.81 6 1/2 12 7 1/2 6 1/2 1 8 7/8 8 1/2 87
6 11 8 1/2 1 5.76 7 3/4 12 8 1/4 7 3/4 1 8 7/8 9 1/2 103
8 13 1/2 10 5/8 1 1/8 7.62 9 3/4 12 10 1/2 9 3/4 1 8 7/8 11 3/4 157
10 16 12 3/4 1 3/16 9.56 12 12 12 7/8 12 1 1/8 12 1 14 1/4 214
12 19 15 1 1/4 11.38 14 3/8 12 15 9/16 14 3/8 1 1/2 12 1 17 329
14 21 16 1/4 1 3/8 14.00 16 12 17 1/8 16 1 1/4 12 1 1/8 18 3/4 296
16 23 1/2 18 1/2 1 7/16 16.00 18 12 19 5/8 18 1 1/4 16 1 1/8 21 1/4 388
18 25 21 1 9/16 18.00 20 12 20 15/16 20 1 3/8 16 1 1/4 22 3/4 362
20 27 1/2 23 1 11/16 20.00 22 12 23 3/16 22 1 3/8 20 1 1/4 25 434
22
24 32 27 1/4 1 7/8 24.00 26 1/4 12 27 1/2 26 1/4 1 1/2 20 1 3/8 29 1/2 574

FLANGE – FULL BARREL, ANSI CLASS 150, B16.5 (IN)

20190216025245 73132 - ANSI/ASME B16.5 Long Weld Neck Flange Dimensions

Pipe Size

(NPS)

Outside

Diameter

of

Flange

A

Diameter

of

Raised

Face

B

Thickness

of

Flange


C

Diameter

of

Bore


D

Diameter

of Hub

at Base


J

Length

of

Hub


K

Nut

Stop

Diameter


NS

Nut

Relief

Diameter


NR

Nut

Relief

Length


NL

Nunber

of

Bolt

Holes

Diamete

of

Bolt

Holes

Bolt

Circle

Diameter


P

Approx.

Weight

1/2 3 1/2 1 3/8 7/16 0.50 1 1/4 9 1 1/2 1 1/4 3/4 4 5/8 2 3/8 21
3/4 3 7/8 1 11/16 1/2 0.75 1 5/8 9 1 7/8 1 5/8 3/4 4 5/8 2 3/4 27
1 4 1/4 2 9/16 1.00 2 9 2 1/ 4 2 3/4 4 5/8 3 1/8 30
1 1/4 4 5/8 2 1/2 5/8 1.25 2 3/8 9 2 5/8 2 3/8 3/4 4 5/8 3 1/2 36
1 1/2 5 2 7/8 11/16 1.50 2 5/8 9 3 2 5/8 3/4 4 5/8 3 7/8 41
2 6 3 5/8 3/4 2.00 3 1/4 9 3 11/ 16 3 1/16 7/8 4 3/4 4 3/4 57
2 1/2 7 4 1/8 7/8 2.50 3 3/4 9 4 7/16 3 3/4 7/8 4 3/4 5 1/2 79
3 7 1/2 5 15/16 3.00 4 1/4 9 4 15/15 4 1/4 7/8 4 3/4 6 86
3 1/2 8 1/2 5 1/2 15/16 3.50 4 7/8 9 5 15/16 4 7/8 7/8 8 3/4 7 110
4 9 6 3/16 15/16 4.00 5 1/2 12 6 7/16 5 1/2 7/8 8 3/4 7 1/2 164
5 10 7 5/16 15/16 5.00 6 1/2 12 7 1/2 6 1/2 1 8 7/8 8 1/2 189
6 11 8 1/2 1 6.00 7 3/4 12 8 1/4 7 3/4 1 8 7/8 9 1/2 216
8 13 1/2 10 5/8 1 1/8 8.00 9 3/4 12 10 1/2 9 3/4 1 8 7/8 11 3/4 292
10 16 12 3/4 1 3/16 10.00 12 12 12 7/8 12 1 1/8 12 1 14 1/4 382
12 19 15 1 1/4 12.00 14 3/8 12 15 9/16 14 3/8 1 1/2 12 1 17 535
14 21 16 1/4 1 3/8 14.00 16 12 17 1/8 16 1 1/4 12 1 1/8 18 3/4 585
16 23 1/2 18 1/2 1 7/16 16.00 18 12 19 5/8 18 1 1/4 16 1 1/8 21 1/4 714
18 25 21 1 9/16 18.00 20 12 20 15/16 20 1 3/8 16 1 1/4 22 3/4 711
20 27 1/2 23 1 11/16 20.00 22 12 23 3/16 22 1 3/8 20 1 1/4 25 840
22
24 32 27 1/4 1 7/8 24.00 26 1/4 12 27 1/2 26 1/4 1 1/2 20 1 3/8 29 1/2 1046

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