Monel 400 Slip-On Flange API 6A 2-1/16” 20000 PSI

✅ Monel 400 Slip-On Flange – API 6A Standard – 2-1/16" – 20000 PSI

Product Name: Monel 400 Slip-On Flange
Standard: API 6A (American Petroleum Institute)
Nominal Size: 2-1/16 inch
Pressure Rating: 20000 PSI (20K)
Flange Type: Slip-On (SO) Flange
Manufacturer: SSM (Specialized Alloy Flange Manufacturer)

🧱 Product Overview:

The Monel 400 Slip-On Flange offered by SSM complies with API 6A and is designed for 2-1/16" pipe size, with a pressure rating of 20000 PSI (approx. 138 MPa). This flange is engineered for extreme high-pressure and highly corrosive environments, commonly used in oil and gas wellheads, choke and kill manifolds, Christmas trees, and sour gas service.

🔧 Material Features – Monel 400 (UNS N04400):

Approximately 63% Nickel and 30% Copper – excellent resistance to chloride-induced stress corrosion cracking;

Outstanding resistance to seawater, hydrofluoric acid, hydrochloric acid, and alkaline solutions;

High mechanical strength with good ductility, suitable for cold working;

Fully compliant with NACE MR0175 / ISO 15156 for sour service.

📐 Construction Details:

Slip-On Design: Bore slightly larger than pipe OD, welded externally – ideal for systems with moderate pressure and lower alignment precision;

Available with RF (Raised Face) or RTJ (Ring Type Joint) sealing surfaces;

Flange thickness, bolt holes, and sealing face dimensions strictly machined according to API 6A;

Weld ends undergo heat treatment to relieve stress and enhance durability.

🏭 Typical Applications:

High Pressure High Temperature (HPHT) oil well systems

Wellhead and Christmas tree assemblies

Sour gas pipelines (including H₂S environments)

Offshore drilling and production platforms

High-pressure testing and control lines

📦 Why Choose SSM:

Third-party inspection available (SGS, TÜV, etc.)

Supplied with EN 10204 3.1 / 3.2 Mill Test Certificates

Full material traceability, compliant with API 6A PSL2 / PSL3 requirements

Custom options available: internal cladding, special sealing faces, coatings, or non-standard dimensions

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