Spectacle Blind Flanges Manufacturer
SPECTACLE FLANGES
Spectacle flanges are highly specialized pieces of equipment that can be used for a variety of industrial applications. They provide efficient sealing, reliable performance and are designed to help facilitate inspection, repair and maintenance needs. Spectacle s, also known as spades or ring spacers. A Spectacle Flange is a specialized piece of equipment that can be used in many industrial applications. It features a drilled hole and two gaskets on either side; when assembled, the combination of these components effectively isolates objects while providing a secure and reliable seal. Typically, these flanges are composed of stainless steel or other durable materials.
Standard Specification For Spectacle Flanges
Dimensions : ANSI B16.5, ANSI B16.47 Series A & B, MSS SP44,
ASA, API-605, AWWA,
Custom Drawings
Size : 1/2″ (15 NB) to 48″ (1200NB)
Class : 150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500
LBS
DIN : DIN2527, DIN2566, DIN2573, DIN2576, DIN2641, DIN2642,
DIN2655, DIN2656,
DIN2627, DIN2628, DIN2629,
DIN 2631, DIN2632, DIN2633, DIN2634, DIN2635, DIN2636,DIN2637, DIN2638,
DIN2673
DIN Standard
ND-6,10, 16, 25, 40 Etc.
BS : BS4504 , BS4504, BS1560, BS10 , PN6 , PN10 , PN16 , PN25 ,
PN40, etc
Table : D / E / F / H / J / K
API STANDARDS : PSI-2000/3000/5000/10000/ETC
JIS Standards : 2220-2004 5k/10k/16k , ETC
Flange Face Type : Flate Face (FF), Raised Face (RF), Ring Type
Joint (RTJ)
Material & Grades of Spectacle Flanges :
Stainless Steel Spectacle Flanges :
ASTM A 182, A 240 F 304, 304L, 304H, 316, 316L, 316Ti, 310, 310S, 321, 321H, 317,
347, 347H, 904L
Duplex & Super Duplex Steel Spectacle Flanges :
ASTM / ASME A/SA 182 F 44, F 45, F51, F 53, F 55, F 60, F 61
Carbon Steel Spectacle Flanges :
ASTM / ASME A/SA 105 ASTM / ASME A 350 , ASTM A 181 LF 2 / A516 Gr.70 A36, A694 F42,
F46, F52, F60, F65, F706
Low Temperature Carbon Steel Spectacle Flanges : ASTM A350, LF2, LF3
Alloy Steel Spectacle Flanges :
ASTM / ASME A/SA 182 & A 387 F1, F5, F9, F11, F12, F22, F91
Copper Alloy Steel Spectacle Flanges : ASTM SB 61 , SB62 ,
SB151 , SB152 UNS No. C 70600 (Cu-Ni 90/10),
C 71500 (Cu-Ni 70/30), UNS No. C 10100, 10200, 10300, 10800, 12000, 12200
Nickel Alloy Spectacle Flanges :
ASTM SB564, SB160, SB472, SB162 Nickel 200 (UNS No. N02200), Nickel 201 (UNS No.
N02201), Monel 400 (UNS
No. N04400), Monel 500 (UNS No. N05500), Inconel 800 (UNS No. N08800), Inconel 825
(UNS No. N08825), Inconel
600 (UNS No. N06600), Inconel 625 (UNS No. N06625), Inconel 601 (UNS No. N06601),
Hastelloy C 276 (UNS No.
N10276), Alloy 20 (UNS No. N08020)
Applications, Industries & Export Supply
Our Spectacle Blind Flanges are used for line isolation and maintenance switching between flow and block modes. We maintain focus on standards compliance, dimensional accuracy, and material traceability to support project and replacement requirements.
Industries Served: oil & gas, petrochemical, refineries, power generation, EPC projects, marine, water treatment, and general engineering.
Supply Regions: India, GCC/Gulf markets, and global export projects with commercial support for manufacturer, supplier, stockist, and exporter requirements.
Request a Quote: Share your size, pressure class, material grade, and quantity for faster offer turnaround.
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Frequently Asked Questions About Spectacle Blinds
How does a Spectacle Blind function compared to a standard Blind Flange?
A Spectacle Blind consists of a ring and a solid plate connected by a web, designed to rotate between an open (flow) and closed (blocked) position. It provides a visual, highly positive indicator of whether a line is blocked off. In contrast, a standard Blind Flange is merely a solid sealing plate bolted to the end of a line, normally used to permanently or semi-permanently close off a piping system end.
Frequently Asked Questions
How does a Spectacle Blind Flange work?A Spectacle Blind (or Figure-8 Blank) looks like a pair of eyeglasses. It consists of a solid plate (the blind) and a hollow ring (the spacer). It is installed between two flanges to permanently or temporarily isolate a piping section. Simply rotating it allows you to switch a line from "open flow" to "shut off" without removing piping.
In what pressure classes do you manufacture Spectacle Blinds?We supply Spectacle Blinds in accordance with ASME B16.48 across all standard pressure classes (150#, 300#, 600#, 900#, 1500#). Sizes above NPS 24 are available upon custom request for heavy utility lines.