Stainless steel plate flanges 1.4571/316Ti — overview

Stainless steel plate flanges 1.4571/316Ti are flanges machined from corrosion‑resistant stainless steel plate made to the 1.4571 (commonly known as 316Ti) grade. This titanium‑stabilised austenitic stainless steel combines the general corrosion resistance of 316 with improved stability after welding, making it a reliable choice where resistance to intergranular corrosion and elevated‑temperature performance are required.

What is a plate flange?

A plate flange is a flat, circular component produced from steel plate and finished with bolt holes and a sealing face. Plate flanges can be supplied as plain (full face), bored to match a pipe bore, or as blind plates to close pipe ends. They are used to join pipes, valves, tanks and equipment or to provide a removable access point for inspection and maintenance.

Material details — 1.4571 / 316Ti

The material designation 1.4571 (European EN number) corresponds to the grade commonly called 316Ti in everyday use. You may also see it referenced by its EN name X6CrNiMoTi17‑12‑2 or by AISI/ASTM style naming in international contexts (316Ti). This grade is a titanium‑stabilised version of 316, which helps prevent chromium carbide precipitation during welding and high temperature exposure, maintaining corrosion resistance in welded constructions.

Key properties

• Corrosion resistance: excellent general corrosion resistance typical of 316 family stainless steels, suitable for many chloride‑containing environments.
• Weldability: good weldability; titanium stabilisation reduces risk of intergranular corrosion after welding.
• Formability and machinability: plate flanges are machined from plate allowing accurate bolt hole drilling and face finishing.
• High‑temperature stability: improved stability compared with plain 316 when exposed to elevated temperatures for extended periods.

Where and how plate flanges 1.4571/316Ti are used

Plate flanges in 1.4571/316Ti are used wherever a robust, corrosion‑resistant flange connection is required. Typical applications include:

• Marine and offshore installations (piping, manifolds, closures)
• Chemical and petrochemical plants (corrosive service lines)
• Food, beverage and pharmaceutical equipment (hygienic closures and inspection ports)
• Power generation and boilers (where elevated temperatures and corrosion resistance are important)
• Water and wastewater systems
• Construction and architectural metalwork
• Automotive and engineering workshops for specialised fabrications and repairs
• Small‑scale or garage projects where stainless corrosion resistance is required

Who buys these flanges?

The main customers are pipefitters, fabricators, marine and offshore contractors, plant maintenance teams, OEMs, and engineering procurement departments. They are also useful to smaller businesses and skilled DIYers who require high‑quality stainless connections.

Standards, selection and practical notes

When selecting stainless steel plate flanges 1.4571/316Ti, consider the following:

• Flange type: plate flanges may be plain, bored or blind. Choose depending on whether you need a full‑face plate, a matching bore, or an end cap.
• Pressure rating and dimensions: specify the required pressure class or PN/ANSI rating and the bolt pattern to match existing piping or equipment.
• Face finish: choose a suitable sealing face (raised face, flat face, RTJ where applicable) and surface finish for the gasket type.
• Material certification: request mill/test certificates or material traceability when required by regulation or project specification.
• Welding and fabrication: 1.4571 is weldable using standard stainless procedures; the titanium stabilisation reduces the need for post‑weld heat treatment to avoid intergranular corrosion in many cases, but follow project or code requirements.

Notes on standards and markings

In the UK and Europe these flanges are typically specified by EN/DIN designations (for example 1.4571 / X6CrNiMoTi17‑12‑2), while in international contexts you may see the 316Ti designation used. Always confirm the exact grade and certification required for your application — standards and markings help ensure material suitability for pressure, temperature and corrosive service.

Why choose 1.4571/316Ti plate flanges?

Choose stainless steel plate flanges 1.4571/316Ti when you need:

• Reliable corrosion resistance in chloride‑containing or aggressive environments
• Good performance after welding and during intermittent elevated temperatures
• A material commonly accepted across marine, chemical, food and power industries

Further help

If you need assistance selecting the correct plate flange size, face type or pressure rating for your project, contact our technical team with your piping details and operating conditions. We can help ensure the right 1.4571 / 316Ti plate flange is specified for safe, long‑lasting performance.