Spectacle Flanges are critical pipeline isolation components used to safely block or allow flow within industrial piping systems. Named for their distinctive figure-eight shape, these flanges consist of a solid blank and an open ring connected by a metal section. They are widely used in oil & gas, petrochemical, refinery, power generation, chemical processing, and offshore applications where reliable line isolation is essential. Gopal Forge Industries™ manufactures premium-quality Spectacle Flanges engineered for durability, safety, and long-term performance in demanding operating environments.
Spectacle Flanges, Spectacle Flanges Manufacturers, Spectacle Flanges Suppliers, Spectacle Flanges Stockists, Spectacle Flanges Exporters
Gopal Forge Industries™ is recognized among leading Spectacle Flanges manufacturers known for delivering precision-engineered products that comply with international industry standards. Our advanced manufacturing facility utilizes modern forging, machining, and inspection technologies to ensure dimensional accuracy and structural integrity. Every flange is carefully produced to provide dependable isolation performance in critical process systems.
As experienced Spectacle Flanges exporters, Gopal Forge Industries™ supplies high-quality piping components to clients across global industrial markets. We follow stringent quality assurance procedures and provide complete material traceability, inspection reports, and export documentation. Our efficient logistics network enables timely deliveries while maintaining the highest standards of product protection and compliance.
Gopal Forge Industries™ has built a strong reputation among reliable Spectacle Flanges suppliers by offering a comprehensive range of sizes, pressure classes, and material grades. Our engineering team assists customers in selecting suitable line blanking solutions based on operating conditions and project requirements. This technical expertise helps ensure safe operation, improved maintenance procedures, and long-term system reliability.
As dependable Spectacle Flanges stockists, we maintain extensive inventory to support emergency maintenance, plant shutdowns, and ongoing industrial projects. Our ready stock includes carbon steel, stainless steel, alloy steel, duplex steel, super duplex steel, and nickel alloy Spectacle Flanges. This inventory availability enables quick dispatch and helps customers minimize downtime during critical operations.
Among trusted Spectacle Flanges manufacturers, Gopal Forge Industries™ continuously invests in advanced manufacturing processes and quality control systems. Each flange undergoes dimensional inspection, material verification, and rigorous testing procedures before dispatch. This commitment to quality ensures excellent sealing performance, operational safety, and compliance with industry specifications.
Being professional Spectacle Flanges suppliers, we provide complete industrial piping solutions beyond line blanking products. Our product portfolio includes pipe fittings, buttweld fittings, carbon steel elbow, stainless steel elbow, reducers, tees, forged fittings, valves, weld neck flanges, blind flanges, and other industrial piping solutions. This comprehensive offering enables customers to source compatible piping components from a single trusted supplier.
Spectacle Flanges Manufacturers in India, Spectacle Flanges Suppliers in India, Spectacle Flanges Stockists in India, Spectacle Flanges Exporters in India
Spectacle Flanges Specification
| Technical Description |
Forged, heat-treated and machined spectacle flanges designed for positive isolation of piping systems. Available with Raised Face (RF), Flat Face (FF), Ring Type Joint (RTJ), Male-Female, Tongue & Groove and Lap-Joint face configurations. Custom designs available as per drawing. |
| Available Sizes |
1/2" (15 NB) to 48" (1200 NB), DN10 to DN5000. Custom sizes available as per drawing and applicable standard. |
| Standards |
ASME/ANSI B16.5, ASME B16.47 Series A & B, ASME B16.48, MSS SP-44, API 605, BS 10, BS 4504, BS 1560, AS 2129, EN 1092-1, DIN, JIS B2220, GOST, UNI, AWWA C207, SABS, NFE, ISO 7005 and other applicable international standards. |
| Material Grades |
ASTM A182 forged stainless steel and alloy steel grades. ASTM A182 F316 stainless steel available. Other material grades available according to service requirements and customer specifications. |
| Pressure Ratings |
ASME Class 150, 300, 600, 900, 1500 and 2500; DIN/EN PN6, PN10, PN16, PN25, PN40 and PN64; JIS 5K, 10K, 16K, 20K, 30K, 40K and 63K. |
| Dimensions |
Manufactured according to applicable ASME, ANSI, DIN, EN, BS, JIS, GOST, UNI and other international standards. Equal and reducing configurations and special dimensions available as per drawing. |
| Applications |
Bitumen upgraders.
Heavy-oil refineries.
Petrochemical plants.
Chemical and acid-processing facilities.
Nuclear power plants.
Oil & gas systems and other demanding industrial piping applications.
|
| Testing & Certification |
EN 10204 3.1 / 3.2 Material Test Certificates (MTC)
Raw Material Certificate
Hydrostatic Test Report
Radiographic Testing (RT) Report
Ultrasonic Testing (UT) Report
Magnetic Particle Testing (MPT) Report
Third Party Inspection Report
NACE MR0103 and NACE MR0175 certification available where required
|
| Surface Finish / Coating |
Oil Black Paint, Anti-rust Paint, Zinc Plated, Yellow Transparent Coating, Cold-Dip Galvanized and Hot-Dip Galvanized. |
| Flange Face Types |
Raised Face (RF), Flat Face (FF), Ring Type Joint (RTJ), Large Male-Female (LMF), Small Male-Female (SMF), Lap-Joint Face (LJF), Small Tongue, Large Tongue & Groove and Groove. |
| Manufacturing Process |
Forged, heat treated, machined and finished according to applicable international standards and customer specifications. |
| Special Design |
Manufactured as per customer drawings and specifications. AS, ANSI, BS, DIN, JIS and other international standards supported. |
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FAQ's
A Spectacle Flange, also known as a Spectacle Blind,
is a piping component used to provide positive isolation of a pipeline.
It consists of a solid blind section and an open ring connected by a
narrow web, allowing the line to be either blocked or opened by rotating
the assembly.
Spectacle Flanges are primarily used for positive isolation
of piping systems. The solid portion blocks the flow when positioned
between the flanges, while the open ring allows normal flow when the
line is in service. This makes them useful during maintenance,
inspection, and shutdown operations.
Spectacle Flanges are available in a wide range of materials depending
on the operating pressure, temperature, and process media. Common
materials include:
- Carbon Steel
- Stainless Steel
- Duplex Stainless Steel
- Alloy Steel
- Nickel Alloys
Spectacle Flanges are commonly manufactured according to applicable
piping flange standards such as ASME B16.48 for line
blanks. Dimensions, pressure ratings, materials, and other requirements
are selected according to the applicable specification and project
requirements.
Spectacle Flanges are commonly used in oil & gas,
petrochemical, chemical processing, power generation, refineries,
water treatment, and industrial process piping. They are
particularly useful where reliable pipeline isolation is required
during maintenance, inspection, or plant shutdowns.
Application of Spectacle Flanges
Latest Price List of Spectacle Flanges
The latest market pricing for Spectacle Flanges depends on factors such as material grade, flange size, pressure rating, thickness, testing requirements, and fluctuations in raw material costs. Carbon steel Spectacle Flanges are generally available at economical industrial pricing, while stainless steel, duplex steel, super duplex steel, alloy steel, and nickel alloy variants command higher market values due to enhanced corrosion resistance and mechanical properties. Gopal Forge Industries™ offers competitive market-based pricing and customized quotations for EPC contractors, industrial projects, and bulk procurement requirements.
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