BLIND FLANGE

Model NO.: BLIND

Quantity:

Product Description

Blind Flanges

Used for terminating or isolating piping systems, blind flanges are essentially boltable blank discs. When installed properly and combined with the correct gaskets, they can achieve an outstanding seal which is easy to remove when needed.

Size Range | 1/2″ – 36″ NPS (Larger sizes available upon request)
Classes | ASME/ANSI 150, 300, 600, 900, 1500, 2500
Stainless Steel Grades | 304, 304L, 316, 316L, 316L, 317L, 321 , 347 *
Special Alloys | 2205, 254SMo, Monel, Inconel *
Chrome Moly | P5, P9, P11, P22, P91 *
Standards | ASTM / ASME / ANSI

BLIND CLASS 150 (IN INCH)

Blind flange dimensions class 150 in inches

FLANGE NPS	Outside Diameter	Bolt Circle (BC)	Raised Face (R)	Raised Face (RF)	Raised Face Thickness (T)	Flat Face Thickness (T2)	Bolt Hole (B)	No. of Bolt Holes
1/2″	3.50″	2.38″	1.38″	.063″	.44″	.38″	.62″	4
3/4″	3.88″	2.75″	1.69″	.063″	.50″	.44″	.62″	4
1″	4.25″	3.12″	2.00″	.063″	.56″	.50″	.62″	4
1-1/4″	4.62″	3.50″	2.50″	.063″	.62″	.56″	.62″	4
1-1/2″	5.00″	3.88″	2.88″	.063″	.68″	.62″	.62″	4
2″	6.00″	4.75″	3.62″	.063″	.75″	.69″	.75″	4
2-1/2″	7.00″	5.50″	4.12″	.063″	.88″	.82″	.75″	4
3″	7.50″	6.00″	5.00″	.063″	.94″	.88″	.75″	4
3-1/2″	8.50″	7.00″	5.50″	.063″	.94″	.88″	.75″	8
4″	9.00″	7.50″	6.19″	.063″	.94″	.88″	.75″	8
5″	10.00″	8.50″	7.31″	.063″	.94″	.88″	.88″	8
6″	11.00″	9.50″	8.50″	.063″	1.00″	.94″	.88″	8
8″	13.50″	11.75″	10.62″	.063″	1.12″	1.06″	.88″	8
10″	16.00″	14.25″	12.75″	.063″	1.19″	1.13″	1.00″	12
12″	19.00″	17.00″	15.00″	.063″	1.25″	1.19″	1.00″	12
14″	21.00″	18.75″	16.25″	.063″	1.38″	1.32″	1.12″	12
16″	23.50″	21.25″	18.50″	.063″	1.44″	1.38″	1.12″	16
18″	25.00″	22.75″	21.00″	.063″	1.56″	1.50″	1.25″	16
20″	27.50″	25.00″	23.00″	.063″	1.69″	1.63″	1.25″	20
22″	29.50″	27.25″	25.25″	.063″	1.81″	1.75″	1.38″	20
24″	32.00″	29.50″	27.25″	.063″	1.88″	1.82″	1.38″	20

BLIND CLASS 300 (IN INCH)

Blind flange dimensions class 300 in inches

FLANGE NPS	Outside Diameter	Bolt Circle (BC)	Raised Face (R)	Raised Face (RF)	Raised Face Thickness (T)	Flat Face Thickness (T2)	Bolt Hole (B)	No. of Bolt Holes
1/2″	3.75″	2.62″	1.38″	.063″	0.56″	0.50″	0.62″	4
3/4″	4.62″	3.25″	1.69″	.063″	0.62″	.056″	0.75″	4
1″	4.88″	3.50″	2.00″	.063″	0.69″	0.63″	0.75″	4
1-1/4″	5.25″	3.88″	2.50″	.063″	0.75″	0.69″	0.75″	4
1-1/2″	6.12″	4.50″	2.88″	.063″	0.81″	0.75″	0.88″	4
2″	6.50″	5.00″	3.62″	.063″	0.88″	0.82″	0.75″	8
2-1/2″	7.50″	5.88″	4.12″	.063″	1.00″	0.94″	0.88″	8
3″	8.25″	6.62″	5.00″	.063″	1.12″	1.06″	0.88″	8
3-1/2″	9.00″	7.25″	5.50″	.063″	1.19″	1.13″	0.88″	8
4″	10.00″	7.88″	6.19″	.063″	1.25″	1.19″	0.88″	8
5″	11.00″	9.25″	7.31″	.063″	1.38″	1.32″	0.88″	8
6″	12.50″	10.62″	8.50″	.063″	1.44″	1.38″	0.88″	12
8″	15.00″	13.00″	10.62″	.063″	1.62″	1.56″	1.00″	12
10″	17.50″	15.25″	12.75″	.063″	1.88″	1.82″	1.12″	16
12″	20.50″	17.75″	15.00″	.063″	2.00″	1.94″	1.25″	16
14″	23.00″	20.25″	16.25″	.063″	2.12″	2.06″	1.25″	20
16″	25.50″	22.50″	18.50″	.063″	2.25″	2.19″	1.38″	20
18″	28.00″	24.75″	21.00″	.063″	2.38″	2.32″	1.38″	24
20″	30.50″	27.00″	23.00″	.063″	2.50″	2.44″	1.38″	24
22″	33.00″	29.25″	25.25″	.063″	2.63″	2.57″	1.63″	24
24″	36.00″	32.00″	27.25″	.063″	2.75″	2.69″	1.62″	24

BLIND CLASS 400 (IN INCH)

Blind flange dimensions class 400 in inches

FLANGE NPS	Outside Diameter	Bolt Circle (BC)	Raised Face (R)	Raised Face (RF)	Raised Face Thickness (T)	Flat Face Thickness (T2)	Bolt Hole (B)	No. of Bolt Holes
1/2″	3.75″	2.62″	0.12″	.250″	0.81″	0.56″	0.62″	4
3/4″	4.62″	3.25″	0.12″	.250″	0.87″	0.62″	0.75″	4
1″	4.88″	3.50″	0.12″	.250″	0.94″	0.69″	0.75″	4
1-1/4″	5.25″	3.88″	0.19″	.250″	1.06″	0.81″	0.75″	4
1-1/2″	6.12″	4.50″	0.25″	.250″	1.13″	0.88″	0.88″	4
2″	6.50″	5.00″	0.31″	.250″	1.25″	1.00″	0.75″	8
2-1/2″	7.50″	5.88″	0.31″	.250″	1.37″	1.12″	0.88″	8
3″

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