Monel Weld Neck Flange (WNRF) Manufacturer And Supplier

SSM is a trusted manufacturer and supplier of Monel Weld Neck Flanges (WNRF) designed for excellent corrosion resistance and high mechanical strength in harsh industrial environments. Our Monel flanges are widely used in marine, chemical, and oil & gas applications where durability and resistance to seawater and acids are essential.

What is a Monel Weld Neck Flange (WNRF)?

A Weld Neck Flange (WNRF) is a type of flange with a long tapered hub that provides high structural strength and reduces stress concentration at the base of the flange.
When made from Monel, a nickel-copper alloy, the flange offers exceptional performance in corrosive and high-temperature environments.

Monel WNRF flanges are typically used in:

High-pressure pipelines

Offshore and marine systems

Chemical processing plants

Heat exchangers and condensers

Grades of Monel Used

SSM manufactures Monel Weld Neck Flanges in the following grades:

Monel 400 (UNS N04400): Excellent resistance to seawater, acids, and alkalis.

Monel K500 (UNS N05500): Offers higher strength and hardness with the same corrosion resistance as Monel 400.

Standards and Specifications

Our Monel Weld Neck Flanges (WNRF) are produced according to major international standards, including:

ASME B16.5

ASME B16.47 Series A / B

MSS SP-44

DIN / EN / JIS / BS

Available in sizes from ½" to 60" and pressure ratings Class 150 to 2500.

Material and Testing

Each Monel WNRF flange is manufactured from high-quality forged Monel billets and tested to ensure full compliance with customer and international standards.
Testing includes:

PMI (Positive Material Identification)

Ultrasonic and Radiographic Testing

Hydrostatic Pressure Test

Mechanical and Chemical Analysis

Key Features

Superior resistance to seawater, acids, and alkalis

Excellent performance in high-temperature and high-pressure systems

Smooth weld transition for better stress distribution

High fatigue strength and long service life

Available with RF (Raised Face), RTJ (Ring Type Joint), or custom face finish

Applications of Monel WNRF Flanges

Offshore oil & gas platforms

Heat exchangers and evaporators

Chemical and petrochemical processing

Marine engineering

Power generation plants

Why Choose SSM?

Over 30 years of experience in flange manufacturing

Complete in-house forging, machining, and testing facilities

Full traceability and certification (EN 10204 3.1 / 3.2)

Fast delivery and global export service

Customized production available upon request

Contact SSM

Looking for a Monel Weld Neck Flange (WNRF) manufacturer?
SSM provides reliable quality, fast delivery, and competitive prices for global customers.

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