Inch Dimensions of Blind Flanges as per ASME B16.5

Blind Flange Dimensions
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A blind flange which is also known as a ‘closure plate flange’ is installed at the end of a pipe to close its end keeping in mind its future expansion and drainage requirements. It has no centre hole or bore, so there is no flow through the flange. They are mostly used for isolating a pipe, valve, or pressure vessel. Blind flanges are available in all sizes and classes, and may use a flat, raised, or ring-type joint face, according to type of gasket used.

150# Blind Flange Dimensions as per ASME B16.5

150# Flange Body Dimensions

Blind Flange Dimensions
Blind Flange Dimensions
NPSO
Flange OD
tf
Flange Thickness
1/23.500.38
3/43.880.44
14.250.5
1-1/44.620.56
1-1/25.000.62
26.000.69
2-1/27.000.81
37.500.88
3-1/28.500.88
49.000.88
510.000.88
611.000.94
813.501.06
1016.001.12
1219.001.19
1421.001.31
1623.501.38
1825.001.5
2027.501.62
2432.001.81

150# Bolts Template

Flange Drilling Template
Flange Drilling Template
NPSBCD
Bolt Circle Dia.
BHD
Bolt Hole Dia
BOLTS
Number of Bolts
BD
Dia. Of Bolt
SBL RF
Stud Bolt Length (RF)
SBL RJ
Stud Bolt Length (RJ)
MBL RF
Machine Bolt Length (RF)
1/22.385/841/22.25NA2
3/42.755/841/22.5NA2
13.125/841/22.53.002.25
1-1/43.55/841/22.753.252.25
1-1/23.885/841/22.753.252.5
24.753/445/83.253.752.75
2-1/25.53/445/83.54.00.3
363/445/83.54.003
3-1/273/485/83.54.003
47.53/485/83.54.003
58.57/883/43.754.253.25
69.57/883/444.503.25
811.757/883/44.254.753.5
1014.251127/84.55.004
12171127/84.755.254
1418.751-1/81215.255.754.5
1621.251-1/81615.255.754.5
1822.751-1/4161-1/85.756.255
20251-1/4201-1/86.256.755.5
2429.51-3/8201-1/46.757.256

300# Blind Flange Dimensions as per ASME B16.5

300# Flange Body Dimensions

Blind Flange Dimensions
Blind Flange Dimensions
NPSO
Flange OD
tf
Flange Thickness
1/23.750.5
3/44.620.56
14.880.62
1-1/45.250.69
1-1/26.120.75
26.500.81
2-1/27.500.94
38.251.06
3-1/29.001.12
410.001.19
511.001.31
612.5O1.38
815.001.56
1017.501.81
1220.501.94
1423.002.06
1625.502.19
1828.002.31
2030.502.44
2436.002.69

300# Bolts Template

Flange Drilling Template
Flange Drilling Template
NPSBCD
Bolt Circle Dia.
BHD
Bolt Hole Dia
BOLTS
Number of Bolts
BD
Dia. Of Bolt
SBL RF
Stud Bolt Length (RF)
SBL RJ
Stud Bolt Length (RJ)
MBL RF
Machine Bolt Length (RF)
1/22.625/841/22.53.002.25
3/43.253/445/833.502.5
13.53/445/833.502.5
1-1/43.883/445/83.253.752.75
1-1/24.57/843/43.54.003
253/485/83.54.003
2-1/25.887/883/444.503.25
36.627/883/44.254.753.5
3-1/27.257/883/44.255.003.75
47.887/883/44.55.003.75
59.257/883/44.755.254.25
610.627/8123/44.755.504.25
8131127/85.56.004.75
1015.251-1/81616.256.755.5
1217.751-1/4161-1/86.757.255.75
1420.251-1/4201-1/877.506.25
1622.51-3/8201-1/47.58.006.5
1824.751-3/8241-1/47.758.256.75
20271-3/8241-1/488.757.25
24321-5/8241-1/2910.008

400# Blind Flange Dimensions as per ASME B16.5

400# Flange Body Dimensions

Blind Flange Dimensions
Blind Flange Dimensions
NPSO
Flange OD
tf
Flange Thickness
1/23.750.56
3/44.620.62
14.880.69
1-1/45.250.81
1-1/26.120.88
26.501
2-1/27.501.12
38.251.25
3-1/29.001.38
410.001.38
511.001.5
612.501.62
815.001.88
1017.502.12
1220.502.25
1423.002.38
1625.502.5
1828.002.62
2030.502.75
2436.003

400# Bolts Template

Flange Drilling Template
Flange Drilling Template
NPSBCD
Bolt Circle Dia.
BHD
Bolt Hole Dia
BOLTS
Number of Bolts
BD
Dia. Of Bolt
SBL RF
Stud Bolt Length (RF)
SBL RJ
Stud Bolt Length (RJ)
MBL RF
Machine Bolt Length (RF)
1/22.625/841/232.753
3/43.253/445/83.53.253.5
13.53/445/83.53.253.5
1-1/43.883/445/83.753.503.75
1-1/24.57/843/44.254.004.25
253/485/84.254.004.25
2-1/25.887/883/44.754.504.75
36.627/883/454.755
3-1/27.25187/85.55.255.5
47.88187/85.55.255.5
59.25187/85.755.255.75
610.621127/865.756
8131-1/81216.756.506.75
1015.251-1/4161-1/87.57.257.5
1217.751-3/8161-1/487.758
1420.251-3/8201-1/48.258.008.25
1622.51-1/2201-3/88.758.508.75
1824.751-1/2241-3/898.759
20271-5/8241-1/29.59.259.75
24321-7/8241-3/410.510.2511

600# Blind Flange Dimensions as per ASME B16.5

150# Flange Body Dimensions

Blind Flange Dimensions
Blind Flange Dimensions
NPSO
Flange OD
tf
Flange Thickness
1/23.750.56
3/44.620.62
14.880.69
1-1/45.250.81
1-1/26.120.88
26.501
2-1/27.501.12
38.251.25
3-1/29.001.38
410.751.5
513.001.75
614.001.88
816.502.19
1020.002.5
1222.002.62
1423.752.75
1627.003
1829.253.25
2032.003.5
2437.004

600# Bolts Template

Flange Drilling Template
Flange Drilling Template
NPSBCD
Bolt Circle Dia.
BHD
Bolt Hole Dia
BOLTS
Number of Bolts
BD
Dia. Of Bolt
SBL RF
Stud Bolt Length (RF)
SBL RJ
Stud Bolt Length (RJ)
MBL RF
Machine Bolt Length (RF)
1/22.625/841/232.753
3/43.253/445/83.53.253.5
13.53/445/83.53.253.5
1-1/43.883/445/83.753.503.75
1-1/24.57/843/44.254.004.25
253/485/84.254.004.25
2-1/25.887/883/44.754.504.75
36.627/883/454.755
3-1/27.25187/85.55.255.5
48.5187/85.755.505.75
510.51-1/8816.56.256.5
611.51-1/81216.756.506.75
813.751-1/4121-1/87.57.257.75
10171-3/8161-1/48.58.258.5
1219.251-3/8201-1/48.758.508.75
1420.751-1/2201-3/89.259.009.25
1623.751-5/8201-1/2109.7510
1825.751-3/4201-5/810.7510.5010.75
2028.51-3/4241-5/811.2511.0011.5
24332241-7/81312.7513.25

900# Blind Flange Dimensions as per ASME B16.5

150# Flange Body Dimensions

Blind Flange Dimensions
Blind Flange Dimensions
NPSO
Flange OD
tf
Flange Thickness
1/24.750.88
3/45.121
15.881.12
1-1/46.251.12
1-1/27.001.25
28.501.5
2-1/29.621.62
39.501.5
411.501.75
513.752
615.002.19
818.502.5
1021.502.75
1224.003.12
1425.253.38
1627.753.5
1831.004
2033.754.25
2441.005.5

900# Bolts Template

Flange Drilling Template
Flange Drilling Template
NPSBCD
Bolt Circle Dia.
BHD
Bolt Hole Dia
BOLTS
Number of Bolts
BD
Dia. Of Bolt
SBL RF
Stud Bolt Length (RF)
SBL RJ
Stud Bolt Length (RJ)
MBL RF
Machine Bolt Length (RF)
1/23.257/843/44.254.004.25
3/43.57/843/44.54.254.5
14147/854.755
1-1/44.38147/854.755
1-1/24.881-1/8415.55.255.5
26.5187/85.755.505.75
2-1/27.51-1/8816.256.006.25
37.5187/85.755.505.75
49.251-1/481-1/86.756.506.75
5111-3/881-1/47.57.257.5
612.51-1/4121-1/87.57.257.75
815.51-1/2121-3/88.758.508.75
1018.51-1/2161-3/89.259.009.25
12211-1/2201-3/8109.7510
14221-5/8201-1/210.7510.5011
1624.251-3/4201-5/811.2511.0011.5
18272201-7/812.7512.5013.25
2029.52-1/820213.7513.5014.25
2435.52-5/8202-1/217.2517.0018

1500# Blind Flange Dimensions as per ASME B16.5

1500# Flange Body Dimensions

Blind Flange Dimensions
Blind Flange Dimensions
NPSO
Flange OD
tf
Flange Thickness
1/24.750.88
3/45.121
15.881.12
1-1/46.251.12
1-1/27.001.25
28.501.5
2-1/29.621.62
310.501.88
412.252.12
514.752.88
615.503.25
819.003.62
1023.004.25
1226.504.88
1429.505.25
1632.505.75
1836.006.38
2038.757
2446.008

1500# Bolts Template

Flange Drilling Template
Flange Drilling Template
NPSBCD
Bolt Circle Dia.
BHD
Bolt Hole Dia
BOLTS
Number of Bolts
BD
Dia. Of Bolt
SBL RF
Stud Bolt Length (RF)
SBL RJ
Stud Bolt Length (RJ)
MBL RF
Machine Bolt Length (RF)
1/23.257/843/44.254.004.25
3/43.57/843/44.54.254.5
14147/854.755
1-1/44.38147/854.755
1-1/24.881-1/8415.55.255.5
26.5187/85.755.505.75
2-1/27.51-1/8816.256.006.25
381-1/481-1/876.757
49.5181-1/47.757.507.75
511.51-3/881-1/29.759.509.75
612.51-1/2121-3/810.2510.0010.5
815.51-3/4121-3/811.511.2512.75
10192121-7/813.2513.0013.5
1222.52-1/816214.7514.5015.25
14252-3/8162-1/41615.7516.75
1627.752-5/8162-1/217.517.2518.5
1830.52-7/8162-3/419.519.2520.75
2032.753-1/816321.2521.0022.25
24393-5/8163-1/224.2524.0025.5

2500# Blind Flange Dimensions as per ASME B16.5

2500# Flange Body Dimensions

Blind Flange Dimensions
Blind Flange Dimensions
NPSO
Flange OD
tf
Flange Thickness
1/25.251.19
3/45.501.25
16.251.38
1-1/47.251.5
1-1/28.001.75
29.252
2-1/210.502.25
312.002.62
414.003
516.503.62
619.004.25
821.755
1026.506.5
1230.007.25
NPSO
Flange OD
tf
Flange Thickness

2500# Bolts Template

Flange Drilling Template
Flange Drilling Template
NPSBCD
Bolt Circle Dia.
BHD
Bolt Hole Dia
BOLTS
Number of Bolts
BD
Dia. Of Bolt
SBL RF
Stud Bolt Length (RF)
SBL RJ
Stud Bolt Length (RJ)
MBL RF
Machine Bolt Length (RF)
1/23.57/843/44.754.504.75
3/43.757/843/454.755
14.25147/85.55.255.5
1-1/45.121-1/84165.756
1-1/25.751-1/441-1/86.756.506.75
26.751-1/88176.757
2-1/27.751-1/481-1/87.757.508
391-3/881-1/48.758.509
410.751-5/881-1/2109.7510.25
512.751-7/881-3/411.7511.5012.25
614.52-1/88213.513.2514
817.252-1/81221514.7515.5
1021.252-5/8122-1/219.2519.0020
1224.382-7/8122-3/421.2521.0022
NPSBCD
Bolt Circle Dia.
BHD
Bolt Hole Dia
BOLTS
Number of Bolts
BD
Dia. Of Bolt
SBL RF
Stud Bolt Length (RF)
SBL RJ
Stud Bolt Length (RJ)
MBL RF
Machine Bolt Length (RF)

General Notes

Dimensions are in millimeters, except for diameters of bolts and bolt holes, which are in inch units.