Flanges

What are pipe flanges?

Pipe flanges are forged ring connections that join pipe, valves, pumps and equipment with bolts and a gasket. Facing (RF, FF or RTJ), bore and pressure class must match the piping class. Most industrial packages follow ASME B16.5 for NPS 1/2 to 24 and ASME B16.47 for larger OD, with ASTM/ASME material specs for chemistry and mechanicals.

This page is the flanges category homepage for Savoy Piping Inc. Browse flange types in the product grid below, and use the PRODUCTS sidebar for stainless, carbon, alloy, duplex, nickel, copper-nickel and titanium grades.

Standards that define the package

Dimensional control is usually ASME B16.5 (pipe flanges and flanged fittings) or ASME B16.47 Series A/B for large-diameter flanges. Metric projects often call EN 1092-1 / DIN. Material is ordered to the ASTM forging specification that matches the pipe:

• Stainless - ASTM A182 / ASME SA182 (F304, F304L, F316, F316L, F321, F347, F904L, F44 / SMO 254)
• Carbon / LTCS / high-yield - ASTM A105, A350 LF2, A694 F42 to F70
• Chrome-moly alloy - ASTM A182 F5, F9, F11, F22, F91
• Duplex / super duplex - UNS S31803 / S32205, S32750, S32760
• Nickel alloys - Inconel 600/601/625, Monel 400/K500, Hastelloy C22/C276, Nickel 200/201
• Copper-nickel - CuNi 90/10 and 70/30
• Titanium / specialty - Grade 2 / Grade 5, Alloy 20, AISI 4130

Related hubs: ASTM A182 stainless flanges · DIN / EN 1092-1 flanges · EN 1092-1 dimensions.

Flange types we supply

Common ASME forms stocked and made to order:

• Weld neck (WNRF) - preferred for high-pressure / cyclic service
• Slip-on (SORF) - easier fit-up on lower-pressure lines
• Blind (BLRF) - to blank off piping or vessel nozzles
• Socket weld (SWRF) and threaded for small-bore packages
• Lap-joint with stub ends for frequent dismantling
• Long weld neck, reducing, spectacle blind and RTJ facings

Sizes, classes and facings

Typical supply covers ASME Class 150, 300, 600, 900, 1500 and 2500 (project-dependent), with raised face (RF), flat face (FF) or ring-type joint (RTJ). Bore and schedule must match the connected pipe. Marking normally includes size, class, material grade, heat number and manufacturer identification for full traceability.

How to choose the right grade

• General stainless process - start with 304 / 304L; move to 316L for chlorides
• High temperature / chrome-moly - F11 / F22 / F91 matched to A335 pipe
• Low temperature carbon - A350 LF2 with A333 Gr.6 systems
• Pipeline / high yield - A694 grades aligned to API 5L strength levels
• Seawater / high PREN - duplex S32205, super duplex S32750, or SMO 254
• Severe corrosion - Inconel 625, Hastelloy C276, Monel 400, or titanium Grade 2/5

What to put on the enquiry or purchase order

To quote quickly, include: material grade / ASTM class (e.g. A182 F316L), flange type and facing (WNRF RF, SORF, Blind RTJ, etc.), size and pressure class, bore/schedule, quantity, destination, and documentation (EN 10204 3.1 or 3.2, PMI, NACE MR0175 notes, third-party inspection). Email sales@savoypipinginc.com or use the Request Quote button above.

Documentation and inspection

Supply packages can include mill test certificates, heat-number traceability, dimensional reports, and optional NDT or buyer/TPI attendance. Products are marked per applicable ASTM/ASME requirements so each flange ties back to the certified heat.

Typical applications

Flanges are used wherever bolted piping must connect equipment, valves or removable spools — oil & gas and refining, chemical and petrochemical plants, power and utility steam lines, water treatment, marine and offshore modules, skids and fabrication yards. Pair flanges with matching pipe, buttweld fittings and fasteners from the same material family when the project requires a single MTC trail.

Frequently asked questions

What flanges do you supply?

Weld neck (WNRF), slip-on (SORF), blind (BLRF), socket weld (SWRF), threaded, lap-joint, long weld neck, reducing, spectacle blind and RTJ flanges to ASME B16.5 / B16.47 and related EN 1092-1 packages.

How do I use this flanges hub?

Start here for the full category. Open a flange type from the product grid, or pick a material grade from the PRODUCTS sidebar, then continue to the grade or form page for specs and enquiry.

Which standards apply?

Dimensional: ASME B16.5 (NPS ½–24), ASME B16.47 Series A/B for larger OD, EN 1092-1 / DIN for metric packages. Material: ASTM A182, A105, A350, A694 and related nickel-alloy specs.

What pressure classes are available?

Common ASME classes include 150, 300, 600, 900, 1500 and 2500 (project-dependent). Confirm facing (RF/RTJ/FF), bore and schedule with the piping class.

What should be on the purchase order?

Material grade / ASTM class, flange type and facing, size, pressure class, bore/schedule, quantity, MTC (EN 10204 3.1/3.2), and any NACE/PMI/NDT/TPI extras.

What materials are listed here?

Stainless (A182 F304/F316L and related), carbon (A105, A350 LF2, A694), chrome-moly alloy (A182 F5–F91), duplex / super duplex, Inconel, Monel, Hastelloy, copper-nickel, titanium, Alloy 20, SMO 254 and AISI 4130.