Stainless Steel Flanges & Fittings Supplier

High-Quality Industrial Stainless Steel Fittings and Flanges 

Stainless Tubular Products has an in-depth inventory of stainless steel flanges and fittings. We inventory fittings and flanges in standard, duplex, and high-alloy stainless steel grades. If it is “hard to find,” we pride ourselves on working with manufacturers that can produce a product that meets your needs.

Stainless Steel Flanges and Fittings We Carry

We stock stainless steel fittings and flanges to match how piping engineers and procurement teams spec a job: by connection type, then by pressure class and grade.

Our fittings include:

• Butt weld fittings connect directly to pipe ends through a full-penetration weld, giving the joint the same wall strength as the pipe itself.

• Socket weld fittings slide over the pipe end and weld from the outside, a common choice for smaller-diameter, high-pressure lines.

• Threaded fittings screw onto pipe ends with no welding required, letting crews assemble or break down a line without a torch on site.

• Elbows turn a pipe run in a new direction, most commonly at 45 or 90 degrees.

• Tees split one line into two flow paths from a single connection point.

• Reducers step a line down or up between two different pipe diameters.

• Nipples are short lengths of threaded pipe used to join two fittings or extend a connection by a few inches.

Our flanges include:

• A.S.A. flanges follow ANSI/ASME B16.5 dimensions, the standard most industrial piping systems in the U.S. use.

• M.S.S. flanges follow Manufacturers Standardization Society specifications and cover lines where A.S.A. dimensions do not apply.

• Back-up flanges pair with a stub end to close a lap joint connection without exposing stainless steel to the bolt circle.

Stainless Steel Grades We Stock

We offer stainless steel flanges and fittings in numerous grades, such as:

Our inventory is also available in specialty alloys like:

Industries That Depend on Stainless Steel Fittings and Flanges

We supply stainless steel fittings and flanges to industries that cannot risk a corroded joint failing mid-run:

• Oil & Gas: Facilities rely on our flanges and fittings to resist the sour gas and saltwater that corrode standard piping, from the wellhead to the refinery.

• Chemical & Petrochemical Processing: Plants need fittings and flanges that withstand the acids and solvents that flow through the process line every day.

• Pharmaceutical & Biotech: Manufacturers need sanitary-grade fittings and flanges that keep a system free of contamination and easy to clean.

• Food & Beverage Processing: Production lines call for the same sanitary standard, with fittings and flanges that hold up to wash-down cycles and meet hygiene requirements.

• Power Generation: Plants, from nuclear facilities to renewable generation sites, depend on fittings and flanges rated for high heat and high pressure.

• Water & Wastewater Treatment: Municipal and industrial facilities use our flanges and fittings because they resist the chemicals and mineral buildup common in treatment systems.

• Marine & Shipbuilding: Applications call for grades built to resist saltwater and constant humidity.

• Pulp & Paper: Mills use fittings and flanges with bleaching chemicals and high-moisture environments that quickly wear down standard steel.

Applications for Stainless Steel Flanges and Fittings

Our stainless steel fittings and flanges appear wherever a piping system requires a joint that will not fail.

• Process Piping: Fittings and flanges connect and route the lines that carry liquids and gases through a facility.

• Sanitary Connections: Our flanges and fittings meet the wash-down and clean-in-place standards required for hygienic processing lines.

• Structural and Mechanical Assemblies: Fittings and flanges anchor equipment skids and structural framing where connections must hold under load.

Get the Stainless Steel Fittings and Flanges Your Project Needs

Send us your specs, and we match the exact grade and standard from stock, or source it through our manufacturer network if it's hard to find. From oil and gas to food and beverage, our fittings and flanges withstand corrosion and wear. Reach out today, and one of our specialists will quickly get you a quote.

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Frequently Asked Questions About Stainless Steel Flanges and Fittings

Do you carry nonstandard or metric-spec fittings and flanges?

If a project calls for metric or DIN-spec sizing outside our standard stock, we work with our manufacturer network to source it, just as we handle any hard-to-find item.

How do I know which fitting type is right for my application?

It comes down to your pressure requirements and how often the line needs to come apart for maintenance. High-pressure, permanent connections typically call for butt or socket weld fittings, while lines that need regular disassembly often use threaded fittings instead.

Can I get a quote fast for an urgent order?

Reach out with your specs and quantity, and our team will confirm real-time availability from stock.