Flanges
Stainalloy offers a premium selection of flanges, including Duplex F51 (UNS S31803 / S32205) and Super Duplex F53 (UNS S32750) / F55 (UNS S32760).
All products are NORSOK M650 approved, ensuring outstanding performance in demanding environments such as offshore oil & gas, petrochemical processing, power generation, and desalination.
With proven corrosion resistance and mechanical strength, our flanges are built for critical reliability.
Product Details
Stainalloy offers a broad stock program of high-quality weld neck, blind, and slip-on flanges in Duplex (F51 / UNS S31803 / S32205), Super Duplex (F53 / UNS S32750, F55 / UNS S32760), and 6% moly alloys.
Available from ½” up to 48” OD in all pressure classes, our flanges are designed according to ASME B16.5, ASME B16.47, and API 6A standards.
Every flange in our portfolio meets or exceeds international testing standards such as ASTM A182, NORSOK M630 (D44/D54), and Shell MESC SPE 76-212. In fact, all incoming materials undergo in-house quality verification, including chemical analysis, ultrasonic examination, hardness testing, and dye penetrant inspection.
With NORSOK M650 approved supply routes and a unique stock position, our flanges are trusted across global energy, desalination, and heavy industrial projects. Precision-engineered dimensions ensure full compatibility and reliable performance—wherever reliability is critical.
Fast, Flexible, Global Delivery
Whether you need immediate delivery from stock or scheduled shipments for long-term projects, we deliver where and when you need it.
From urgent single shipments to complete packages, we tailor our delivery to your planning.
Prefer to handle logistics yourself? No problem. We offer flexible delivery terms, including Ex Works. Want us to take care of everything? We’ll arrange full-service transport, tracking, and documentation.
Get in touch to discuss the best delivery setup for your project.
Rowan de Visser
Senior Sales Engineer Stock
Germán Gómez
Head of Stock Sales
How may we help you?
Send us your enquiry or request a quote.
Let’s talk about your material needs, project specs, or delivery timelines. Our team is ready to assist.
Related products
Your required material not listed?
Contact us about the possibilities
Even if the products or materials you are looking for are not listed here, we may still be able to help you.