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Inch Dimensions of Weld Neck Flange Rating 150 as per ASME B16.5

Weld Neck Flange Dimensions

Weld Neck Flange Dimensions

Metric Dimensions
150 300 400 600 900 1500 2500
Inch Dimensions
150 300 400 600 900 1500 2500

NPSOtfX
1/23.500.381.19
3/43.880.441.50
14.250.501.94
1-1/44.620.562.31
1-1/25.000.622.56
26.000.693.06
2-1/27.000.813.56
37.500.884.25
3-1/28.500.884.81
49.000.885.31
510.000.886.44
611.000.947.56
813.501.069.69
1016.001.1212.00
1219.001.1914.38
NPSOtfX
1421.001.3115.75
1623.501.3818.00
1825.001.5019.88
2027.501.6222.00
2432.001.8126.12

Weld Neck Flange Dimensions

Weld Neck Flange Dimensions

NPSAYB
1/20.841.810.62
3/41.052.000.82
11.322.121.05
1-1/41.662.191.38
1-1/21.902.381.61
22.382.442.07
2-1/22.882.692.47
33.502.693.07
3-1/24.002.753.55
44.502.944.03
55.563.445.05
66.633.446.07
88.633.947.98
1010.753.9410.02
1212.754.4412.00
NPSAYB
1414.004.94BY P
1616.004.94BY P
1818.005.44BY P
2020.005.62BY P
2424.005.94BY P

Templates for drilling of bolt holes

Flange Drilling Template

Flange Drilling Template

NPSBCDBHDBOLTSBD
1/22.385/841/2
3/42.755/841/2
13.125/841/2
1-1/43.505/841/2
1-1/23.885/841/2
24.753/445/8
2-1/25.503/445/8
36.003/445/8
3-1/27.003/485/8
47.503/485/8
58.507/883/4
69.507/883/4
811.757/883/4
1014.251127/8
1217.001127/8
NPSBCDBHDBOLTSBD
1418.751-1/8121
1621.251-1/8161
1822.751-1/4161-1/8
2025.001-1/4201-1/8
2429.501-3/8201-1/4

Flange Drilling Template

Flange Drilling Template

NPSSBL RFYSBL RJMBL RF
1/22.25NA2.00
3/42.50NA2.00
12.503.002.25
1-1/42.753.252.25
1-1/22.753.252.50
23.253.752.75
2-1/23.504.00.3.00
33.504.003.00
3-1/23.504.003.00
43.504.003.00
53.754.253.25
64.004.503.25
84.254.753.50
104.505.004.00
124.755.254.00
NPSSBL RFYSBL RJMBL RF
145.255.754.50
165.255.754.50
185.756.255.00
206.256.755.50
246.757.256.00

Metric Dimensions
150 300 400 600 900 1500 2500
Inch Dimensions
150 300 400 600 900 1500 2500

General Notes

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

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