Alloy Steel Spectacle Blind Flanges

Alloy Steel Spectacle Blind Flanges

Leading manufacturer and exporter of Pipe Flanges including Weld Neck, Slip On, Blind, Socket Weld, Threaded, Lap Joint, Long Weld Neck, RTJ, Orifice, Spectacle Blind, and Plate Flanges in Stainless Steel, Duplex, Super Duplex, Nickel Alloy, Titanium, Carbon Steel, and Alloy Steel.

Price

USD 900 - USD 18,000 Per Ton

Manufacturer & Supplier

Renaissance Pipe Fitting Inc.

Product Dimensions & Specifications
Diameter
15 NB to 3000 NB
Size
1/2" (15 NB) to 60" (1500 NB)
Dimensions
1/2" (15 NB), 3/4" (20 NB), 1" (25 NB), 2" (50 NB), 4" (100 NB), 6" (150 NB), 8" (200 NB), 10" (250 NB), 12" (300 NB), 16" (400 NB), 20" (500 NB), 24" (600 NB), 30" (750 NB), 36" (900 NB), 48" (1200 NB), 60" (1500 NB)
Pressure Class
150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS, ASA 150, ASA 300, PN6, PN10, PN16, PN25, PN40, PN64, PN100, PN160
Compliance
NACE MR0175

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 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

Mechanical Properties
Yield
205 MPa
Tensile
415 MPa

F5

5% chromium alloy steel with improved oxidation resistance.

Best For

High temperature applications

Applications

Refineries and petrochemical facilities

Mechanical Properties
Yield
275 MPa
Tensile
485 MPa

F9

9% chromium alloy steel with superior heat resistance.

Best For

Elevated temperature service

Applications

Steam systems and process industries

Mechanical Properties
Yield
310 MPa
Tensile
515 MPa

F11

Chrome moly alloy steel offering excellent creep resistance.

Best For

High-pressure steam service

Applications

Power generation and refinery piping

Mechanical Properties
Yield
275 MPa
Tensile
485 MPa

F22

2.25% chromium and 1% molybdenum alloy steel.

Best For

High temperature pressure systems

Applications

Petrochemical plants and boilers

Mechanical Properties
Yield
310 MPa
Tensile
515 MPa

F91

Premium 9Cr-1Mo-V alloy steel with exceptional creep resistance.

Best For

Ultra-supercritical power plants

Applications

High-pressure high-temperature steam systems

Mechanical Properties
Yield
415 MPa
Tensile
585 MPa

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.

Technical Overview

Pipe Flanges

Overview

Pipe flanges are essential mechanical components used to connect pipes, valves, pumps, pressure vessels, and process equipment. They provide a reliable, leak-proof, and easily maintainable connection in industrial piping systems.

Types of Flanges

  • Weld Neck Flanges
  • Slip On Flanges
  • Blind Flanges
  • Socket Weld Flanges
  • Threaded Flanges
  • Lap Joint Flanges
  • Long Weld Neck Flanges
  • Orifice Flanges
  • Ring Type Joint (RTJ) Flanges
  • Plate Flanges
  • Spectacle Blind Flanges

Benefits of Industrial Flanges

  • Easy assembly and disassembly
  • Reliable sealing performance
  • Suitable for high-pressure applications
  • Excellent structural strength
  • Wide range of pressure classes
  • Available in multiple facing types
  • Long service life

Available Materials

Flanges are available in Stainless Steel, Duplex Steel, Super Duplex Steel, Carbon Steel, Low Temperature Carbon Steel, Alloy Steel, Nickel Alloy, Titanium, Copper Nickel, Copper Alloy, and Aluminum.

Standards

Manufactured according to ASME B16.5, ASME B16.47, MSS SP-44, API, EN, DIN, BS, and JIS standards.

Applications

Industrial flanges are widely used in oil & gas facilities, petrochemical plants, refineries, LNG terminals, power plants, offshore platforms, chemical processing facilities, desalination plants, and water treatment systems.

About Renaissance Fittings & Piping Inc.

Renaissance Fittings & Piping Inc. is a leading manufacturer, supplier, and exporter of industrial flanges including Weld Neck, Slip On, Blind, RTJ, Long Weld Neck, Socket Weld, Threaded, Lap Joint, Orifice, and Spectacle Blind Flanges. We serve global industries with complete traceability, inspection support, and project documentation.

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
Delivery Information

Global Shipping

Available

Expedited Delivery

Available

Custom Manufacturing

Available

Inspection Support

Available

Worldwide delivery of industrial flanges with export packaging, complete documentation, material traceability, and project logistics support.

Frequently Asked Questions

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