Alloy Steel Spectacle Blind Flanges
Industrial spectacle blind flanges designed for pipeline isolation and maintenance operations in critical process systems.
Price
USD 900 - USD 18,000 Per Ton
Manufacturer & Supplier
Renaissance Pipe Fitting Inc.
Type
Forged, Plate, Machined, Custom Fabricated
Form
Slip On Flanges, Weld Neck Flanges, Socket Weld Flanges, Blind Flanges, Lap Joint Flanges, Threaded Flanges, Long Weld Neck Flanges, Spectacle Flanges, Ring Joint Flanges, Orifice Flanges, Plate Flanges, Customised Flanges
Standards
ASME B16.5, ASME B16.47 Series A, ASME B16.47 Series B, MSS SP-44, API 6A, API 605, EN 1092-1, DIN, BS, JIS, AWWA C207
Our Alloy Steel Flanges Variants
Alloy Steel Blind Flanges
Alloy Steel Lap Joint Flanges
Alloy Steel Long Weld Neck Flanges
Alloy Steel Orifice Flanges
Alloy Steel Plate Flanges
Alloy Steel Ring Joint Flanges
Alloy Steel Slip On Flanges
Alloy Steel Socket Weld Flanges
Alloy Steel Spectacle Blind Flanges
Alloy Steel Threaded Flanges
Alloy Steel Weld Neck Flanges
Alloy Steel grades for Flanges
Browse the available grades for Alloy Steel used in Flanges.
F1
Low alloy steel with improved temperature resistance.
Best For
Moderate temperature service
Applications
Power plants and industrial piping
F5
5% chromium alloy steel with improved oxidation resistance.
Best For
High temperature applications
Applications
Refineries and petrochemical facilities
F9
9% chromium alloy steel with superior heat resistance.
Best For
Elevated temperature service
Applications
Steam systems and process industries
F11
Chrome moly alloy steel offering excellent creep resistance.
Best For
High-pressure steam service
Applications
Power generation and refinery piping
F22
2.25% chromium and 1% molybdenum alloy steel.
Best For
High temperature pressure systems
Applications
Petrochemical plants and boilers
F91
Premium 9Cr-1Mo-V alloy steel with exceptional creep resistance.
Best For
Ultra-supercritical power plants
Applications
High-pressure high-temperature steam systems
Industry Standards
International specifications, manufacturing standards, and compliance requirements applicable to this material.
ASTM A182
Forged alloy steel flanges, fittings, valves and piping components.
ASME SA182
ASME equivalent specification for forged alloy steel components.
Spectacle Blind Flanges
Spectacle Blind Flanges consist of a blind flange and spacer connected by a metal section. They are used to isolate sections of piping while allowing easy visual verification of line status.
Features
- Positive Line Isolation
- Easy Visual Verification
- Durable Construction
- High Pressure Capability
- Long Service Life
Applications
- Refineries
- Petrochemical Plants
- Offshore Platforms
- Process Industries
- Maintenance Shutdown Systems
Quality Assurance
Available with EN 10204 3.1 certification and third-party inspection support.
Industries Served
- Oil & Gas
- Petrochemical
- Refineries
- Power Generation
- Chemical Processing
- LNG
- Offshore
- Marine
- Desalination
- Water Treatment
- Hydrogen
- Mining
- Pharmaceutical
- Food Processing
- Pipeline Infrastructure
- Pulp & Paper
- Renewable Energy
Features
- Precision machined sealing faces
- Raised Face, RTJ and Flat Face options
- Full material traceability
- Custom dimensions available
- Third-party inspection support
- NACE compliant materials available
- Global export packaging
- Custom drilling patterns available
- Dimensional Accuracy
- Corrosion Resistance
- High Efficiency
- Excellent Finish
- Durable Construction
Advantages
- Leak-proof piping connections
- Easy maintenance and inspection
- Suitable for high-pressure systems
- Excellent structural integrity
- Wide range of pressure classes
- Easy assembly and disassembly
- Excellent dimensional accuracy
- Available in all industrial materials
- Long service life
- Cost-effective piping solution
Applications
- Pipeline Systems
- Pressure Vessels
- Heat Exchangers
- Process Piping
- Refineries
- Power Plants
- Chemical Plants
- Offshore Platforms
- LNG Terminals
- Water Treatment Facilities
Inspection & Testing
- PMI Testing
- Dimensional Inspection
- Hydro Testing
- Ultrasonic Testing
- Radiography
- Hardness Testing
- Visual Inspection
- Material Verification
- Third Party Inspection
Manufacturing Process
- Raw Material Inspection
- Forging
- Heat Treatment
- Machining
- Drilling
- Facing Operations
- PMI Testing
- Dimensional Inspection
- Final Inspection
- Packing & Dispatch
Certifications
- EN 10204 3.1
- ISO 9001
- PED
- NACE MR0175
- IBR
- API
Why Choose Us
- 25+ years manufacturing experience
- Complete flange product range
- ASME B16.5 and B16.47 compliant manufacturing
- Worldwide export capabilities
- Fast production lead times
- Third-party inspection support
- Complete material traceability
- Competitive international pricing
- Custom manufacturing available
- Dedicated engineering support