Flanges
Stainless steel flanges
SA182 F304/L and F316/L flanges to ASME B16.5, BS EN 1092-1 and BS 10, in European and non-European origin, from stock or machined to order.
Stainless steel flanges from a UK stockholder
Our stainless steel flanges cover the grades, standards and pressure ratings most often specified for process, chemical, food and water pipework. We stock ASTM/ASME SA182 F304/L and F316/L forged flanges to ASME B16.5 from Class 150 to Class 2500, BS EN 1092-1 flanges from PN10 to PN40, and BS 10 Table D and E flanges.
Whether you need weld neck, slip on, blind, socket weld, screwed or lap joint flanges, our team will help you find the right product for your application. Where a specification calls for European origin material, we hold a separate European range.
Specification
Stainless steel flange specification
Slip on, weld neck, lap joint, screwed, socket weld, blind, bossed blind and long weld neck
Plate slip on, blind, weld neck, bossed slip on and screwed
Other grades, pressure ratings and wall thicknesses are available on request. Material test certificates to EN 10204 3.1 are supplied as standard.
In stock
Stainless flange types in stock
- Weld neck flanges
- Slip on flanges
- Blind flanges
- Bossed blind flanges
- Socket weld flanges
- Screwed (threaded) flanges
- Lap joint flanges
- Long weld neck flanges
- Plate slip on flanges
- Flat face flanges bored for OD tube
304L or 316L: choosing the grade
Grade 304L is the general-purpose austenitic stainless steel, with good corrosion resistance in most water, food and mild chemical service. Grade 316L adds molybdenum, which markedly improves resistance to pitting and crevice corrosion from chlorides. That makes it the usual choice for marine, coastal, chemical and pharmaceutical duty.
The "L" denotes low carbon, which reduces the risk of carbide precipitation (sensitisation) when the flange is welded. Our 304/L and 316/L flanges are dual certified, meeting the requirements of both the standard and the low-carbon grade. For high-temperature service we can also supply European origin F321, F304H and F316H.
Stock or made to order
Standard sizes ship from stock. For anything outside the range, our machine shop can manufacture special stainless flanges from forgings, bar and plate. Send us the size, grade and pressure rating and we will check stock and quote.
- Raised face and flat face finishes
- Non-standard drillings and bores machined in-house
- Urgent items often despatched the same day
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ISO 9001:2015Lloyd’s (LRQA) approved quality system
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EN 10204 3.1 certsFull material traceability as standard
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Same-day serviceAvailable on urgent stock and machined specials
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In-house machiningSpecials and hard-to-find sizes made to order
FAQs
Stainless steel flange questions
Can't find the answer? Our sales team can advise on grades, standards and lead times.
Need a price or a delivery date?
Send us your enquiry, schedule or drawing and our sales team will come back to you with stock, price and lead time.