Metric Dimensions of Blind Flange Rating 150 as per ASME B16.5

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

NPSOtf
1/2909.6
3/410011.2
111012.7
1-1/411514.3
1-1/212515.9
215017.5
2-1/218020.7
319022.3
3-1/221522.3
423022.3
525522.3
628023.9
834527
1040528.6
1248530.2
NPSOtf
1453533.4
1659535
1863538.1
2070041.3
2481546.1

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Templates for drilling of bolt holes

Flange Drilling Template
Flange Drilling Template

NPSBCDBHDBOLTSBD
1/260.35/841/2
3/469.95/841/2
179.45/841/2
1-1/488.95/841/2
1-1/298.45/841/2
2120.73/445/8
2-1/2139.73/445/8
3152.43/445/8
3-1/2177.83/485/8
4190.53/485/8
5215.97/883/4
6241.37/883/4
8298.57/883/4
10362.01127/8
12431.81127/8
NPSBCDBHDBOLTSBD
14476.31-1/8121
16539.81-1/8161
18577.91-1/4161-1/8
20635.01-1/4201-1/8
24749.31-3/8201-1/4

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Flange Drilling Template
Flange Drilling Template

NPSSBL RFYSBL RJMBL RF
1/255NA50
3/465NA50
1657555
1-1/4708555
1-1/2708565
2859570
2-1/29010075
39010075
3-1/29010075
49010075
59511085
610011585
811012090
10115125100
12120135100
NPSSBL RFYSBL RJMBL RF
14135145115
16135145115
18145160125
20160170140
24170185150

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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.