Royal Steel

Carbon Steel Spectacle Blind Flange

ANSI B 16.5, ASME B 16.47, MSS SP44, ASTM A182, 240, 105 Spectacle Blind Flanges Manufacturer & Exporter in India

Stainless Steel Spectacle Blind Flanges, Carbon Steel Spectacle Blind Flanges, Alloy Steel Spectacle Blind Flanges, Nickel Alloy Weld Spectacle Blind Flanges, Monel Spectacle Blind Flanges, Hastelloy Spectacle Blind Flanges Dealer in India

Carbon Steel Spectacle Blind Flanges – also known as figure-8 blind flanges – are generally pieces of metal. Spectacle blind flange cut to fit between two pipe flanges and usually sandwiched between two gaskets. A spectacle blind is often made from two metal discs that are attached to each other by a small section of steel. The shape is similar to a pair of glasses or “spectacles” – hence the name spectacle blind. One end of the blind will have an opening to allow flow through the pipe during operation and the other end is solid to block flow during maintenance. They are generally installed as a permanent device to separate process piping systems.

SS Spectacle Blind Flanges offer a convenient and efficient method to isolate sections of pipelines, providing flexibility during maintenance, repair, or testing while maintaining the overall integrity and safety of the piping system.

Carbon Steel Forged steel flanges

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Spectacle Blind Flanges Availability:

Stainless Steel Spectacle Blind Flanges
Carbon Steel Spectacle Blind Flanges
Alloy Steel Spectacle Blind Flanges
Nickel Alloy Steel Spectacle Blind Flanges
Copper Alloy Spectacle Blind Flanges
Duplex Steel Spectacle Blind Flanges

Spectacle Blind Flanges Specifications:

Size	½" (15 NB) to 48" (1200NB)
Class	150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS ASA 150#, 2.0MPa, 5.0MPa, 10.0MPa, 15.0MPa, 25.0MPa, 42.0MPa
Standards	ANSI B16.5, ANSI B16.47, MSS SP44, ANSI B16.36, ANSI B16.48
DIN	DIN2527, DIN2566, DIN2573, DIN2576, DIN2641, DIN2642, DIN2655, DIN2656, DIN2627, DIN2628, DIN2629, DIN 2631, DIN2632, DIN2633, DIN2634, DIN2635, DIN2636, DIN2637, DIN2638, DIN2673
B.S	BS4504 , BS4504, BS1560, BS10

Grade specifications of Spectacle Blind Flanges

Stainless Steel Spectacle Blind Face Flanges
Standard	ASTM A182 , A240
Grades	F 304, 304L, 304H, 316, 316Ti, 316H, 316L, 316LN, 309S, 309H, 310S, 310H,317, 317L, 321, 321H, 347, 347H, 201, 202, 904L

Spectacle Blind Flange Dimensions – Class 150 to Class 2500

Spectacle Blind 150# Flange Dimensions

PIPE SIZE	150# FLANGES
PIPE SIZE	A	B	C	D	E	F
1/2"	5/8	1-3/4	2-3/8	5/8	1-1/2	1/4
3/4"	13/16	2-1/8	2-3/4	5/8	1-1/2	1/4
1"	1-1/8	2-1/2	3-1/8	9/16	1-1/2	1/4
1-1/4"	1-5/8	2-7/8	3-1/2	9/16	1-1/2	1/4
1-1/2"	1-7/8	3-1/4	3-7/8	9/16	1-1/2	1/4
2"	2-3/8	4	4-3/4	11/16	2	1/4
2-1/2"	2-7/8	4-3/4	5-1/2	11/16	2	1/4
3"	3-1/2	5-1/4	6	11/16	2-1/2	1/4
3-1/2"	4	6-1/4	7	3/4	2-1/2	3/8
4"	4-1/2	6-3/4	7-1/2	3/4	2-1/2	3/8
5"	5-9/16	7-5/8	8-1/2	7/8	3	3/8
6"	6-5/8	8-5/8	9-1/2	7/8	3	1/2
8"	8-5/8	10-7/8	11-3/4	7/8	3	1/2
10"	10-3/4	13-1/4	14-1/4	1	4	5/8
12"	12-3/4	16	17	1	4	3/4
14"	14	17-5/8	18-3/4	1-1/8	4-1/4	3/4
16"	16	20-1/8	21-1/4	1-1/8	4-1/4	7/8
18"	18	21-1/2	22-3/4	1-1/4	4-1/2	1
20"	20	23-3/4	25	1-1/4	4-3/4	1-1/8
24"	24	28-1/8	29-1/2	1-3/8	5-1/2	1-1/4

Spectacle Blind 300# Flange Dimensions

PIPE SIZE	300# FLANGES
PIPE SIZE	A	B	C	D	E	F
1/2"	5/8	2	2-5/8	5/8	1-1/2	1/4
3/4"	13/16	2-1/2	3-1/4	3/4	1-1/2	1/4
1"	1-1/8	2-3/4	3-1/2	11/16	1-1/2	1/4
1-1/4"	1-5/8	3-1/8	3-7/8	11/16	1-1/2	1/4
1-1/2"	1-7/8	3-5/8	4-1/2	7/8	2	1/4
2"	2-3/8	4-1/4	5	3/4	2	3/8
2-1/2"	2-7/8	5	5-7/8	7/8	2-1/2	3/8
3"	3-1/2	5-3/4	6-5/8	7/8	2-1/2	3/8
3-1/2"	4	6-3/8	7-1/4	7/8	2-1/2	1/2
4"	4-1/2	7	7-7/8	7/8	2-1/2	1/2
5"	5-5/8	8-3/8	9-1/4	7/8	3	5/8
6"	6-5/8	9-3/4	10-5/8	7/8	3	5/8
8"	8-5/8	12	13	1	3-1/2	7/8
10"	10-3/4	14-1/8	15-1/4	1-1/8	4	1
12"	12-3/4	16-1/2	17-3/4	1-1/4	4	1-1/8
14"	14	19	20-1/4	1-1/4	4-3/4	1-1/4
16"	16	21-1/8	22-1/2	1-3/8	4-7/8	1-1/2
18"	18	23-3/8	24-3/4	1-3/8	4-1/2	1-5/8
20"	20	25-5/8	27	1-3/8	4-3/4	1-3/4
24"	24	30-3/8	32	1-5/8	5-1/2	2

Spectacle Blind 600# Flange Dimensions

PIPE SIZE	600# FLANGES
PIPE SIZE	A	B	C	D	E	F
1/2"	5/8	2	2-5/8	5/8	1-1/2	1/4
3/4"	13/16	2-1/2	3-1/4	3/4	1-1/2	1/4
1"	1-1/8	2-3/4	3-1/2	3/4	2-1/4	1/4
1-1/4"	1-7/16	3-1/8	3-7/8	3/4	2-1/4	3/8
1-1/2"	1-11/16	3-5/8	4-1/2	7/8	2-5/8	3/8
2"	2-1/8	4-1/4	5	3/4	2-1/4	3/8
2-1/2"	2-5/8	5	5-7/8	7/8	2-5/8	1/2
3"	3-1/4	5-3/4	6-5/8	7/8	2-5/8	1/2
3-1/2"	3-3/4	6-1/4	7-1/4	1	3	5/8
4"	4-1/4	7-1/2	8-1/2	1	3	5/8
5"	5-1/4	9-3/8	10-1/2	1-1/8	3-3/8	3/4
6"	6-3/8	10-3/8	11-1/2	1-1/8	3-3/8	7/8
8"	8-3/8	12-1/2	13-3/4	1-1/4	3-3/4	1-1/8
10"	10-7/16	15-5/8	17	1-3/8	4-1/8	1-3/8
12"	12-3/8	17-7/8	19-1/4	1-3/8	4-1/8	1-5/8
14"	13-5/8	19-1/4	20-3/4	1-1/2	4-1/2	1-3/4
16"	15-5/8	22-1/8	23-3/4	1-5/8	4-7/8	2
18"	17-5/8	24	25-3/4	1-3/4	5-1/4	2-1/8
20"	19-5/16	26-3/4	28-1/2	1-3/4	5-1/4	2-1/2
24"	23-1/2	31	33	2	6	2-7/8

Spectacle Blind 900# Flange Dimensions

PIPE SIZE	900# FLANGES
PIPE SIZE	A	B	C	D	E	F
1/2"	0.625	2.375	3.25	-	1.50	1/4
3/4"	0.0825	2.625	3.50	0.875	1.625	1/4
1"	1.05	3.0	4.0	1.0	2.25	1/4
1-1/4"	1.44	3.375	4.375	1.0	2.25	3/8
1-1/2"	1.68	3.5	4.875	1.125	2.625	3/8
2"	2.16	5.5	6.5	1.0	2.25	1/2
2-1/2"	2.64	6.375	7.5	1.125	2.625	1/2
3"	3.25	6.5	7.5	1.0	2.625	5/8
4"	4.25	8.0	9.25	1.25	3.0	3/4
5"	5.3	9.625	11.0	1.375	3.375	7/8
6"	6.36	11.25	12.5	1.25	3.375	1
8"	8.33	14.0	15.5	1.5	3.75	1-3/8
10"	10.42	17.0	18.5	1.5	4.125	1-5/8
12"	12.39	19.5	21.0	1.5	4.125	1-7/8
14"	13.62	20.375	22.0	1.625	4.5	2-1/8
16"	15.62	22.5	24.25	1.75	4.875	2-3/8
18"	17.62	25.0	27.0	2.0	5.25	2-5/8
20"	19.56	27.375	29.5	2.125	5.25	2-7/8
24"	23.5	32.875	35.5	2.625	6.0	3-1/2

Spectacle Blind 1500# Flange Dimensions

PIPE SIZE	1500# FLANGES
PIPE SIZE	A	B	C	D	E	F
1/2"	0.625	2.375	3.25	-	1.50	1/4
3/4"	0.82	2.625	3.50	0.875	1.625	3/8
1"	1.05	3.0	4.0	1.0	2.5	3/8
1-1/4"	1.375	3.375	4.375	1.0	2.5	3/8
1-1/2"	1.61	3.75	4.875	1.125	2.75	1/2
2"	2.07	5.5	6.5	1.0	2.75	1/2
2-1/2"	2.47	6.375	7.5	1.125	3.0	5/8
3"	3.07	6.75	8.0	1.25	3.0	3/4
4"	4.03	8.125	9.5	1.375	3.5	7/8
5"	5.05	9.875	11.5	1.625	3.5	1-1/8
6"	6.06	11.0	12.5	1.5	3.5	1-3/8
8"	7.98	13.75	15.5	1.75	4.0	1-5/8
10"	10.02	17.0	19.0	2.0	4.5	2
12"	11.94	20.375	22.5	2.125	4.5	2-3/8
14"	13.12	22.625	25.0	2.375	5.0	2-5/8
16"	15.0	25.125	27.75	2.625	5.25	3
18"	16.88	27.625	30.5	2.875	5.75	3-3/8
20"	18.81	29.625	32.75	3.125	6.0	3-3/4
24"	22.62	35.375	39.0	3.625	7.0	4-3/8

Spectacle Blind 2500# Flange Dimensions

PIPE SIZE	2500# FLANGES
PIPE SIZE	A	B	C	D	E	F
1/2"	0.625	2.625	3.5	-	1.50	3/8
3/4"	0.82	2.875	3.75	0.875	1.625	3/8
1"	1.05	3.25	4.25	1.0	2.5	3/8
1-1/4"	1.38	4.0	5.125	1.125	2.5	1/2
1-1/2"	1.61	4.5	5.75	1.25	2.75	5/8
2"	2.07	5.625	6.75	1.125	2.75	5/8
2-1/2"	2.47	6.5	7.75	1.25	3.0	3/4
3"	3.07	7.625	9.0	1.375	3.0	7/8
4"	4.03	9.125	10.75	1.625	3.5	1-1/8
5"	5.05	10.875	12.75	1.875	3.5	1-3/8
6"	6.06	12.375	14.5	2.125	3.5	2
8"	7.81	15.125	17.25	2.125	4.0	2-1/8
10"	9.75	18.625	21.25	2.625	4.5	2-5/8
12"	11.37	21.5	24.375	2.875	4.5	3-1/8

Types of Spectacle Blind Flanges

Industry Standard Class 75 Spectacle Blind Flanges
Industry Standard Class 150 Spectacle Blind Flanges
Industry Standard Class 175 Spectacle Blind Flanges
Industry Standard Class 250 Spectacle Blind Flanges
Industry Standard Class 300 Spectacle Blind Flanges
Industry Standard Class 350 Spectacle Blind Flanges
Plate Spectacle Blind Flanges
Ring Type Joint Spectacle Blind Flanges

Drawing Spectacle Blind Flanges
Square Spectacle Blind Flanges
Nipo Spectacle Blind Flanges
Reducing Spectacle Blind Flanges
Forged Spectacle Blind Flanges
Stainless Steel Spectacle Blind Flanges
Industry Standard Class 125 Light-weight Spectacle Blind Flanges
Industry Standard Class 125/150 Spectacle Blind Flanges

Other Standards of Spectacle Blind Flanges

ANSI B16.5 Spectacle Blind Flanges
ANSI B16.5 Class 150 Spectacle Blind Flanges
ANSI B16.5 Class 300 Spectacle Blind Flanges
ANSI B16.5 Class 400 Spectacle Blind Flanges
ANSI B16.5 Class 600 Spectacle Blind Flanges
ANSI B16.5 Class 900 Spectacle Blind Flanges
ANSI B16.5 Class 1500 Spectacle Blind Flanges
ANSI B16.5 Class 2500 Spectacle Blind Flanges
ASME B16.47 Series A Spectacle Blind Flanges

ASME B16.47 Series B Spectacle Blind Flanges
ANSI B16.36 Orifice Spectacle Blind Flanges
150Lbs Spectacle Blind Flanges
300Lbs Spectacle Blind Flanges
600Lbs Spectacle Blind Flanges
900Lbs Spectacle Blind Flanges
1500Lbs Spectacle Blind Flanges
2500Lbs Spectacle Blind Flanges
DIN Spectacle Blind Flanges PN6-PN40

Forged Flanges Applications

Off-Shore Oil Drilling Companies	Power Generation	Petrochemicals	Gas Processing
Specialty Chemicals	Pharmaceuticals	Pharmaceutical Equipment	Chemical Equipment
Sea Water Equipment	Heat Exchangers	Condensers	Pulp & Paper Industry