150Lbs  
Welding Neck Flanges
ANSI B16.9 ; Dimensions in Inches
 
300Lbs400Lbs600Lbs  
900Lbs 1500Lbs 2500Lbs  
 
Nominal
Pipe Size
(O.D.)
Thickness
Dia of
Hub
Dia of
RF
Dia of
Hub at
Bevel
Length Thru
Hub
Dia of
Bore
Dia of
Bolt Circle
No. of
Bolt
Dia of
Bolt Hole
(O)
(C)
(X)
(R)
(A)
(Y)
(B)
(HD)
(H)
1/23-1/27/161-3/161-3/80.841-7/80.622-3/845/8
3/43-7/81/21-1/21-11/161.052-1/160.822-3/445/8
14-1/49/161-15/1621.322-3/161.053-1/845/8
1-1/44-5/85/82-5/162-1/21.662-1/41.383-1/245/8
1-1/2511/162-9/162-7/81.902-7/161.613-7/845/8
263/43-1/163-5/82.382-1/22.074-3/443/4
2-1/277/83-9/164-1/82.882-3/42.475-1/243/4
37-1/215/164-1/453.502-3/43.07643/4
3-1/28-1/215/164-13/165-1/24.002-13/163.55783/4
4915/165-5/166-3/164.5034.037-1/283/4
51015/166-7/167-5/165.563-1/25.058-1/287/8
61117-9/168-1/26.633-1/26.079-1/287/8
813-1/21-1/89-11/1610-5/88.6347.9811-3/487/8
10161-3/161212-3/410.75410.0214-1/4121
12191-1/412-3/81512.754-1/212.0017121
14211-3/815-3/416-1/414.005*18-3/4121-1/8
1623-1/21-7161818-1/216.005*21-1/4161-1/8
18251-9/1619-7/82118.005-1/2*22-3/4161-1/4
2027-1/21-11/16222320.005-11/16*25201-1/4
24321-7/816-1/827-1/424.006*29-1/2201-3/8

 <   <   <   bottom of Welding Neck Flanges - 150  Lbs >   >   >

 

 

 

300Lbs  
Welding Neck Flanges
ANSI B16.9 ; Dimensions in Inches
 
150Lbs400Lbs 600Lbs  
900Lbs1500Lbs 2500Lbs  
 
Nominal
Pipe Size
(O.D.)
Thickness
Dia of
Hub
Dia of
RF
Dia of
Hub at
Bevel
Length Thru
Hub
Dia of
Bore
Dia of
Bolt Circle
No. of
Bolt
Dia of
Bolt Hole
(O)
(C)
(X)
(R)
(A)
(Y)
(B)
(HD)
(H)
1/23-3/49/161-1/21-3/80.842-1/160.622-5/845/8
3/44-5/85/81-7/81-11/161.052-1/40.823-1/443/4
14-7/811/162-1/821.322-7/161.053-1/243/4
1-1/45-1/43/42-1/22-1/21.662-9/161.383-7/843/4
1-1/26-1/813/162-3/42-7/81.902-11/161.614-1/247/8
26-1/27/83-5/163-5/82.382-3/42.07583/4
2-1/27-1/213-15/164-1/82.8832.475-7/887/8
38-1/41-1/84-5/853.503-1/83.076-5/887/8
3-1/291-3/165-1/25-1/24.003-3/163.557-1/487/8
4101-1/45-3/46-3/164.503-3/84.037-7/887/8
5111-3/877-5/165.563-7/85.059-1/487/8
612-1/21-7/168-1/88-1/26.633-7/86.0710-5/8127/8
8151-5/810-1/410-5/88.634-3/87.9813121
1017-1/21-7/812-5/812-3/410.754-5/810.0215-1/4161-1/8
1220-1/2214-3/41512.755-1/812.0017-3/4161-1/4
14232-1/816-3/416-1/414.005-5/8*20-1/4201-1/4
1625-1/22-1/41918-1/216.005-3/4*22-1/2201-3/8
18282-3/8212118.006-1/4*24-3/4241-3/8
2030-1/22-1/223-1/82320.006-3/8*27241-3/8
24362-3/427-5/827-1/424.006-5/8*32241-3/8

 <   <   <   bottom of Welding Neck Flanges - 300  Lbs >   >   >

 

 

 

400Lbs  
Welding Neck Flanges
ANSI B16.9 ; Dimensions in Inches
 
150Lbs300Lbs600Lbs  
900Lbs1500Lbs2500Lbs  
 
Nominal
Pipe Size		(O.D.) Thickness Dia of
Hub		Dia of
RF		Dia of
Hub at
Bevel		Length Thru
Hub		Dia of
Bore		Dia of
Bolt Circle		No. of
Bolt		Dia of
Bolt Hole
(O) (C) (X) (R) (A) (Y) (B) (HD) (H)
1/2 3-3/4 9/16 1-1/2 1-3/8 0.84 2-1/16 * 2-5/8 4 5/8
3/4 4-5/8 5/8 1-7/8 1-11/16 1.05 2-1/4 * 3-1/4 4 3/4
1 4-7/8 11/16 2-1/8 2 1.32 2-7/16 * 3-1/2 4 3/4
1-1/4 5-1/4 13/16 2-1/2 2-1/2 1.66 2-5/8 * 3-7/8 4 3/4
1-1/2 6-1/8 7/8 2-3/4 2-7/8 1.90 2-3/4 * 4-1/2 4 7/8
2 6-1/2 1 3-5/16 3-5/8 2.38 2-7/8 * 5 8 3/4
2-1/2 7-1/2 1-1/8 3-15/16 4-1/8 2.88 3-1/8 * 5-7/8 8 7/8
3 8-1/4 1-1/4 4-5/8 5 3.50 3-1/4 * 6-5/8 8 7/8
3-1/2 9 1-3/8 5-1/4 5-1/2 4.00 3-3/8 * 7-1/4 8 1
4 10 1-3/8 5-3/4 6-3/16 4.50 3-1/2 * 7-7/8 8 1
5 11 1-1/2 7 7-5/16 5.56 4 * 9-1/4 8 1
6 12-1/2 1-5/8 8-1/8 8-1/2 6.63 4-1/16 * 10-5/8 12 1
8 15 1-7/8 10-1/4 10-5/8 8.63 4-5/8 * 13 12 1-1/8
10 17-1/2 2-1/8 12-5/8 12-3/4 10.75 4-7/8 * 15-1/4 16 1-1/4
12 20-1/2 2-1/4 14-3/4 15 12.75 5-3/8 * 17-3/4 16 1-3/8
14 23 2-3/8 16-3/4 16-1/4 14.00 5-7/8 * 20-1/4 20 1-3/8
16 25-1/2 2-1/2 19 18-1/2 16.00 6 * 22-1/2 20 1-1/2
18 28 2-5/8 21 21 18.00 6-1/2 * 24-3/4 24 1-1/2
20 30-1/2 2-3/4 23-1/8 23 20.00 6-5/8 * 27 24 1-5/8
24 36 3 27-5/8 27-1/4 24.00 6-7/8 * 32 24 1-7/8

 <   <   <   bottom of Welding Neck Flanges - 400  Lbs >   >   >

 

 

 

600Lbs  
Welding Neck Flanges
ANSI B16.9 ; Dimensions in Inches
 
150Lbs 300Lbs 400Lbs  
900Lbs 1500Lbs 2500Lbs  
 
Nominal
Pipe Size
(O.D.)
Thickness
Dia of
Hub
Dia of
RF
Dia of
Hub at
Bevel
Length Thru
Hub
Dia of
Bore
Dia of
Bolt Circle
No. of
Bolt
Dia of
Bolt Hole
(O)
(C)
(X)
(R)
(A)
(Y)
(B)
(HD)
(H)
1/23-3/49/161-1/21-3/80.842-1/16*2-5/845/8
3/44-5/85/81-7/81-11/161.052-1/4*3-1/443/4
14-7/811/162-1/821.322-7/16*3-1/243/4
1-1/45-1/413/162-1/22-1/21.662-5/8*3-7/843/4
1-1/26-1/87/82-3/42-7/81.902-3/4*4-1/247/8
26-1/213-5/163-5/82.382-7/8*583/4
2-1/27-1/21-1/83-15/164-1/82.883-1/8*5-7/887/8
38-1/41-1/44-5/853.503-1/4*6-5/887/8
3-1/291-3/85-1/45-1/24.003-3/8*7-1/481
410-3/41-1/266-3/164.504*8-1/281
5131-3/47-1/167-5/165.564-1/2*10-1/281-1/8
6141-7/88-3/48-1/26.634-5/8*11-1/2121-1/8
816-1/22-3/1610-3/410-5/88.635-1/4*13-3/4121-1/4
10202-1/213-1/212-3/410.756*17161-3/8
12222-5/815-3/41512.756-1/8*19-1/4201-3/8
1423-3/42-3/41716-1/414.006-1/2*20-3/4201-1/2
1627319-1/218-1/216.007*23-3/4201-5/8
1829-1/43-1/421-1/22118.007-1/4*25-3/4201-3/4
20323-1/2242320.007-1/2*28-1/2241-3/4
2437428-1/427-1/424.008*33242

 <   <   <   bottom of Welding Neck Flanges - 600  Lbs >   >   >

 

 

 

900Lbs  
Welding Neck Flanges
ANSI B16.9 ; Dimensions in Inches
 
150Lbs300Lbs400Lbs  
600Lbs 1500Lbs 2500Lbs  
 
Nominal
Pipe Size
(O.D.)
Thickness
Dia of
Hub
Dia of
RF
Dia of
Hub at
Bevel
Length Thru
Hub
Dia of
Bore
Dia of
Bolt Circle
No. of
Bolt
Dia of
Bolt Hole
(O)
(C)
(X)
(R)
(A)
(Y)
(B)
(HD)
(H)
1/2 4-3/4 7/8 1-1/2 1-3/8 0.84 2-3/8 * 3-1/4 4 7/8
3/4 5-1/8 1 1-3/4 1-11/16 1.05 2-3/4 * 3-1/2 4 7/8
1 5-7/8 1-1/8 2-1/16 2 1.32 2-7/8 * 4 4 1
1-1/4 6-1/4 1-1/8 2-1/2 2-1/2 1.66 2-7/8 * 4-3/8 4 1
1-1/2 7 1-1/4 2-3/4 2-7/8 1.90 3-1/4 * 4-7/8 4 1-1/8
2 8-1/2 1-1/2 4-1/8 3-5/8 2.38 4 * 6-1/2 8 1
2-1/2 9-5/8 1-5/8 4-7/8 4-1/8 2.88 4-1/8 * 7-1/2 8 1-1/8
3 9-1/2 1-1/2 5 5 3.50 4 * 7-1/2 8 1
3-1/2 - - - - - - * - - -
4 11-1/2 1-3/4 6-1/4 6-3/16 4.50 4-1/2 * 9-1/4 8 1-1/4
5 13-3/4 2 7-1/2 7-5/16 5.56 5 * 11 8 1-3/8
6 15 2-3/16 9-1/4 8-1/2 6.63 5-1/2 * 12-1/2 12 1-1/4
8 18-1/2 2-1/2 11-3/4 10-5/8 8.63 6-3/8 * 15-1/2 12 1-1/2
10 21-1/2 2-3/4 14-1/2 12-3/4 10.75 7-1/4 * 18-1/2 16 1-1/2
12 24 3-1/8 16-1/2 15 12.75 7-7/8 * 21 20 1-1/2
14 25-1/4 3-3/8 17-3/4 16-1/4 14.00 8-3/8 * 22 20 1-5/8
16 27-3/4 3-1/2 20 18-1/2 16.00 8-1/2 * 24-1/4 20 1-3/4
18 31 4 22-1/4 21 18.00 9 * 27 20 2
20 33-3/4 4-1/4 24-1/2 23 20.00 9-3/4 * 29-1/2 20 2-1/8
24 41 5-1/2 29-1/2 27-1/4 24.00 11-1/22-3/8 * 35-1/2 20 2-5/8

 <   <   <   bottom of Welding Neck Flanges - 900  Lbs >   >   >

 

 

 

1500Lbs  
Welding Neck Flanges
ANSI B16.9 ; Dimensions in Inches
 
150Lbs 300Lbs 400Lbs  
600Lbs 900Lbs 2500Lbs  
 
Nominal
Pipe Size
(O.D.)
Thickness
Dia of
Hub
Dia of
RF
Dia of
Hub at
Bevel
Length Thru
Hub
Dia of
Bore
Dia of
Bolt Circle
No. of
Bolt
Dia of
Bolt Hole
(O)
(C)
(X)
(R)
(A)
(Y)
(B)
(HD)
(H)
1/21-1/27/81-1/21-3/80.842-3/4*3-1/447/8
3/41-3/411-3/41-11/161.052-7/8*3-1/247/8
12-1/161-1/82-1/1621.322-7/8*441
1-1/42-1/21-1/82-1/22-1/21.663-1/4*4-3/841
1-1/22-3/41-1/42-3/42-7/81.904*4-7/841-1/8
24-1/81-1/24-1/83-5/82.384-1/8*6-1/281
2-1/24-7/81-5/84-7/84-1/82.884-5/8*7-1/281-1/8
351-7/85-1/453.50-*881-1/4
3-1/2-----4-7/8*---
46-1/42-1/86-3/86-3/164.506-1/8*9-1/281-3/8
57-1/22-7/87-3/47-5/165.566-3/4*11-1/281-5/8
69-1/43-1/498-1/26.638-3/8*12-1/2121-1/2
811-3/43-5/811-1/210-5/88.6310*15-1/2121-3/4
1014-1/24-1/414-1/212-3/410.7511-1/8*19122
1216-1/24-7/817-3/41512.7511-3/4*22-1/2162-1/8
1417-3/45-1/419-1/216-1/414.0012-1/4*25162-3/8
16205-3/421-3/418-1/216.0012-7/8*27-3/4162-5/8
1822-1/46-3/823-1/22118.0014*30-1/2162-7/8
2024-1/2725-1/42320.00162-7/8*32-3/4163-1/8
2429-1/283027-1/424.003-1/8*39163-5/8

 <   <   <   bottom of Welding Neck Flanges - 1500  Lbs >   >   >

 

 

 

2500Lbs  
Welding Neck Flanges
ANSI B16.9 ; Dimensions in Inches
 
150Lbs 300Lbs 400Lbs  
600Lbs900Lbs 1500Lbs  
 
Nominal
Pipe Size
(O.D.)
Thickness
Dia of
Hub
Dia of
RF
Dia of
Hub at
Bevel
Length Thru
Hub
Dia of
Bore
Dia of
Bolt Circle
No. of
Bolt
Dia of
Bolt Hole
(O)
(C)
(X)
(R)
(A)
(Y)
(B)
(HD)
(H)
1/25-1/41-3/161-11/161-3/80.843-1/2*3-1/247/8
3/45-1/21-1/421-11/161.053-3/4*3-3/447/8
16-1/41-3/82-1/421.324-3/8*4-1/441
1-1/47-1/41-1/22-7/82-1/21.665*5-1/841-1/8
1-1/281-3/43-1/82-7/81.905-5/8*5-3/441-1/4
29-1/423-3/43-5/82.386-5/8*6-3/481-1/8
2-1/210-1/22-1/44-1/24-1/82.88-*7-3/481-1/4
3122-5/85-1/453.507-1/2*981-3/8
3-1/2-----9*---
41436-1/26-3/164.5010-3/4*10-3/481-5/8
516-1/23-5/887-5/165.5612-1/2*12-3/481-7/8
6194-1/49-1/48-1/26.6316-1/2*14-1/282-1/8
821-3/451210-5/88.6318-1/4*17-1/4122-1/8
1026-1/26-1/214-3/412-3/410.75*21-1/4122-5/8
12307-1/417-3/81512.75*24-3/8122-7/8

 <   <   <   bottom of Welding Neck Flanges - 2500  Lbs >   >   >