Spectacle Blind Flange

About Spectacle Blind Flange

A Spectacle Blind Flange (also known as Figure-8 flange) is a safety device used to either isolate a pipeline or allow flow. It consists of two metal disks joined by a web one side being a solid blind plate, the other a ring spacer. By rotating the spectacle blind, the pipeline can be blocked (blind side) or kept open (spacer side). Induskart provides forged spectacle blinds in Carbon Steel, Stainless Steel, and Alloy Steel, manufactured as per ANSI B16.48 standards for reliability and safety in industrial operations.

Technical Specifications:

• Material Grades: ASTM A105 (CS), ASTM A182 F304/F316 (SS), Alloy Steel (on request)

• Type: Spectacle Blind (Figure 8) Flange

• Standard: ANSI B16.48 / ASME B16.5

• Size Range: 1 to 24

• Pressure Ratings: Class 150, 300, 600, 900

• Face Type: Raised Face (RF) / Flat Face (FF) / RTJ

• Special Features: Solid Blind Plate + Spacer Plate, Web Connector for easy rotation

• Manufacturing Method: Forged & CNC Machined

• Surface Finish: Machined, Coated with Anti-Rust Oil

• Testing: Hydrostatic, Ultrasonic, PMI, MTC available

Certifications:
ISO 9001: 2015, IBR Approval, Mill Test Certificate (MTC), TPI (on request)

Applications & Buyer Types:

• Isolation of pipelines during maintenance

• Oil & Gas Industry

• Petrochemical Plants

• Refineries & Power Plants

• Water Treatment Facilities

• Preferred by EPC contractors, OEMs, safety engineers, and plant maintenance heads.

FAQ:

1. What is the main purpose of a Spectacle Blind Flange?
   To isolate or allow flow in pipelines safely.

2. How does it differ from a Blind Flange?
   Blind flange only closes, while spectacle blind has both blind & spacer options.

3. Can spectacle blinds be used for high-pressure systems?
   Yes, depending on material grade and class rating.

4. Are custom sizes available?
   Yes, can be manufactured as per client drawings.

Call to Action:
Choose Induskart for precision-engineered spectacle blind flanges with reliable performance for pipeline safety operations.