Spectacle Blind Flange
Ecostain Rainbow is one of the most professional carbon steel spectacle blind flanges
manufacturers, suppliers, and exporters in India, we feature high-quality products and competitive
prices. We produce international standards ASME/ANSI/IS/DIN/BS/JIS spectacle blind flanges. Standard
sizes of stainless steel and carbon steel spectacle blind flanges are readily available in the stock
to deliver immediately.
Carbon steel spectacle blind flanges, also known as figure-8 blinds, are specialized flanges used to
temporarily or permanently isolate sections of piping systems. They consist of two metal discs
connected by a central hinge, resembling the shape of a pair of eyeglasses or a figure-8 when viewed
from the side. Spectacle blinds are commonly used in industries such as oil and gas, petrochemical,
chemical processing, and power generation. Spectacle blind flanges are typically made of the same
material as the piping system and have the same thickness as the pipe wall. Each disc of the spectacle
blind has a raised face or ring-type joint (RTJ) facing to provide a sealing surface for gaskets. One
disc is solid, while the other has a machined hole or opening in the center.
All Flanges with standard sizes and materials are readily available in stock for immediate delivery. "Looking for large diameter Flanges ? Contact us today for Customized Flanges.
To install a spectacle blind, the solid disc is positioned against the flange face with the
opening facing outward. The other disc is then positioned with the opening aligned with the pipe,
creating an open flow path. When fully open, the spectacle blind allows fluid to flow freely
through the pipeline. To isolate the section of the pipeline, the spectacle blind is rotated 180
degrees, positioning the solid disc in front of the opening and blocking the flow.
Spectacle blinds are typically installed between two standard flanges, and they can be easily
rotated to open or close the flow path as needed. They are often used in conjunction with valves
or other isolation devices for added safety and control.
Pipeline Isolation: They are used to isolate sections of pipelines for maintenance, repair, or inspection purposes, allowing for a safe and controlled shutdown of the system.
Pressure Testing: Spectacle blinds are employed in hydrostatic or pneumatic pressure testing of piping systems to isolate sections of the system and verify the integrity of the joints.
Shutdown and Turnaround Activities: They are used during plant shutdowns or turnaround activities to isolate equipment, vessels, or piping sections for maintenance, cleaning, or repair.
Flushing and Cleaning of Pipelines: Spectacle blinds are used to block off sections of pipelines during flushing, purging, or cleaning operations to prevent contamination or fluid leakage.
Temporary Closure: They can be used as temporary closures for pipeline terminations or openings during construction, commissioning, or decommissioning activities.
Versatility: Spectacle blinds provide a versatile solution for isolating sections of piping systems temporarily or permanently.
Easy Installation: They can be easily installed and removed without the need for special tools or equipment.
Safety: Spectacle blinds provide a reliable and secure means of isolating pipelines, ensuring safe and controlled shutdowns of piping systems.
Cost-Effective: They are typically more cost-effective compared to other isolation devices, making them suitable for budget-conscious projects or temporary applications.
We conduct a series of testing procedures to ensure the quality, reliability, and performance of our Flanges.
These tests are conducted at various stages of manufacturing, from raw material inspection to the final product testing.
| Flanges | Specifications |
|---|---|
| Flanges Types | Spectacle Flange |
| Class | 150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS ASA 150, ASA 300, PN 6,10,16,25, 40,64,100,160 ETC. available with NACE MR 01-75 |
| Size | 1/2″ (15 NB) to 48″ (1200 NB) |
| Standard | ANSI/ASME B16.5, ANSI/ASME B16.47 Series A and Series B, MSS SP44, ASA, API 605, API 6A, AWWA, As per Custom Drawings |
| Pressure Rating | Class 150, Class 300, Class 400, Class 600, Class 900, Class1500, Class 2500 | PN6, PN10, PN16, PN25, PN40, PN64 etc |
| Type | Raised Face (RF), Flat Face (FF), Ring Type Joint (RTJ), Lap-Joint Face (LJF), Large Male-Female (LMF), Small Male-Female (SMF), Large Tongue & Groove, Small Tongue, Groove |
| Grades | |
|---|---|
| Stainless Steel | ASTM A182 F202, F304/304L/304H, F316/316L, F316H, F316TI, F310, F321, F904L |
| Duplex Steel | ASTM/ASME A/SA 789, 790 – UNS NO S 31803, S 32205, S 32550, S 32750, S 32760. |
| Carbon Steel | ASTM A105/A105N, A350 LF1, LF2 CL1/CL2, LF3 CL1/CL2, A694 F42, F46, F48, F50, F52, F56, F60, F65, F70, A516.60, 65, 70 (Spectacle Blind Flange, Spacer Ring/Spade Flange), Steel RST37.2, C22.8 |
| Alloys Steel Flanges | ASTM A182 F1, F5, F9, F11, F22, F91 |
| Special Alloy Flanges | Duplex, Super Duplex, Nickel Alloys |
| Flange Face Type | Flat Face (FF), Raised Face (RF), Ring Type Joint (RTJ) |
| Coating/Surface Treatment | Flat Face (FF), Raised Face (RF), Ring Type Joint (RTJ) |
| Nickel Alloys | Nickel Alloys 200, Nickel Alloys 201 |
| Hastelloy | Hastelloy C-22, Hastelloy C-276, Hastelloy C-2000, Hastelloy C-4, Hastelloy X, Hastelloy B, Hastelloy N, Hastelloy G |
| Inconel | Inconel 600, Inconel 601, Inconel 625, Inconel 625LCF, Inconel 686, Inconel 718, Inconel 800, Inconel 825, Inconel X-750 , Inconel 690, Inconel 602, Inconel 617, Inconel 925, Inconel A-289, Inconel AL-6XN, AL-904L |
As per International Industrial standards we provide all the necessary certifications. We provide certification and documentation, including material test reports (MTRs), inspection reports and compliance certificates to ensure product quality and compliance with standards and specifications.
These testing procedures ensure that flanges manufactured by us meet the standards, performance, and regulatory compliance. Our flanges meet stringent quality requirements and provide reliable performance in different industrial applications.
Ready to elevate your industrial operations with top-tier valve solutions? Look no further than ‘Ecostain Rainbow’, where excellence meets innovation in every valve we manufacture.
With decades of experience in the industry, 'Ecostain Rainbow
Engineering
Exports’ witnessed the critical importance of utilizing high-quality Flanges that
meet international standards. Whether you are in Oil and Gas, petrochemical, power generation,
or any other industry relying on efficient and reliable piping systems, investing in high
quality valves is essential. Don't compromise on safety, performance, or longevity. Partner
with trusted stainless steel Orifice flange manufacturers, suppliers and exporters like us
‘Ecostain Rainbow’, who prioritize quality and adherence to standards, ensuring your
projects are built to last.
Contact us today to
explore our full range of industrial
valves, pipe fittings, pipes
& tubes, flanges and experience the excellence
of our products
and how we can support your piping needs with our expertise and premium-grade valves. Let's
build a
robust infrastructure together.
We are here to help you!
