Product Information
Stainless Steel Sepctacle Blind Flange
-Safety device used to isolate a section of line or piece of quipment
-permanent or long term isolation device
-often used when maintenance work has to be done within a piping system
Product Overview
A Spectacle Blind Flange is a specialized flange combining a solid blind plate and a spacer ring (Figure-8 design), enabling quick switching between isolation and flow modes in pipelines. Made from stainless steel, it is ideal for systems requiring frequent maintenance or pressure testing without full disassembly
Key Specifications
Materials:
Stainless steel grades: ASTM A182 F5, F22, 304/316L for corrosion resistance
Standards:
Complies with ANSI B16.5, DIN, GB, and JIS standards
Pressure Ratings:
Class 150 to Class 2500 (ASME B16.5)
Sizes:
Ranges from ½" to 8" (DN15 to DN200), with RF (Raised Face) sealing for enhanced safety
Design Features
Dual Plates: Rotatable design with a blind plate (for isolation) and a spacer ring (for flow)
Customization:
Supports threaded holes (FNPT) and socket weld (SW) configurations
Available in split designs for easy installation in tight spaces
Durability: Forged construction (ASTM A105/A182) ensures high mechanical strength under extreme pressures
Applications
Oil & Gas: Safely isolate pipeline sections during pressure testing or repairs
Chemical Processing: Switch between production and maintenance modes without downtime
Pharmaceuticals: Hygienic isolation for CIP/SIP-compliant systems
Certifications
Meets NACE MR0175 for sour gas environments5.
ISO 9001-certified manufacturing processes
