» Flange & Fitting » ASME B16.5 Class 300 Blind Flange

ASME B16.5 Class 300 Blind Flange

August 19, 2019

Technical Drawing

300LB blind flange drawing

A typical drawing for Class 300 blind flange, ASME B16.5.

Bolts for 300LB blind flange

Both machine bolt with nuts and stud bolt with nuts can be applied to 300# blind flange.

Dimensions of 300# Blind Flanges

NPSDGKT
1/29534.966.712.7
3/411542.982.614.3
112550.888.915.9
1-1/413563.598.417.5
1-1/215573.0114.319.1
216592.1127.020.7
2-1/2190104.8149.223.9
3210127.0168.327.0
3-1/2230139.7184.228.6
4255157.2200.030.2
5280185.7235.033.4
6320215.9269.935.0
8380269.9330.239.7
10445323.8387.446.1
12520381.0450.849.3
14585412.8514.452.4
16650469.9571.555.6
18710533.4628.658.8
20775584.2685.862.0
22840641.4743.065.1
24915692.2812.868.3
*D: outside diameter of blind flange; K: diameter of bolt circle; G: outside diameter of raised face; T: minimum thickness of 300LB blind flange; All units are mm.

NPSndlLMass
1/245/81/2650.64
3/443/45/8751.11
143/45/8751.39
1-1/443/45/8851.79
1-1/247/83/4902.66
283/45/8903.18
2-1/287/83/41004.85
387/83/41106.81
3-1/287/83/41108.71
487/83/411511.5
587/83/412015.6
6127/83/412020.9
81217/814034.3
10161-1/8116053.3
12161-1/41-1/817078.8
14201-1/41-1/8180105
16201-3/81-1/4190137
18241-3/81-1/4195175
20241-3/81-1/4205221
22241-5/81-1/2230
24241-5/81-1/2230339
*n: number of bolts; d: diameter of bolt holes; l: diameter of bolts; L: length of machine bolt or stud bolt; Mass: approximate weights/masses of the flange; For all blind flanges of class 300, t (height of raused face)=2mm. All units are mm except that d and l are provided in inch and mass in kg.

ASME B16.5 Blind Flanges, Classes
150#300#400#600#
900#1500#2500#-
*Click to view the dimensions and weights of blind flanges of each pressure rating.

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