Fittings
Stainless steel
butt weld fittings
SA403 WP304/L and WP316/L elbows, tees, reducers and caps to ASME B16.9, seamless and welded, in Schedule 10S and 40S.
Stainless butt weld fittings, seamless and welded
We pride ourselves on offering high-quality stainless steel butt weld fittings, made from the best materials and built to be strong and to last. Our range is manufactured to ASTM/ASME SA403 in grades WP304/L and WP316/L, in both seamless (WPS) and welded (WPW) construction, and dimensioned to ASME B16.9 in Schedule 10S and 40S.
Stock includes 45° and 90° long radius elbows, 90° short radius elbows, equal and reducing tees, concentric and eccentric reducers and end caps, in European and non-European origin. Pair them with our SA312 stainless pipe for a fully matched system.
Specification
Stainless butt weld fitting specification
ASTM/ASME SA403 WPW304/L and WPW316/L (welded)
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
Fittings in stock
- 45° long radius elbows
- 90° long radius elbows
- 90° short radius elbows
- Equal tees
- Reducing tees
- Concentric reducers
- Eccentric reducers
- End caps
WPS or WPW?
SA403 fittings are marked WP-S when they are made from seamless material and WP-W when they are made from welded material. Both meet the same dimensional standard. Seamless fittings are often specified for higher-integrity service, while welded fittings are the economical choice for larger bores and general process, water and food pipework.
Choose WP316/L for chloride-bearing or more aggressive service, and WP304/L for general duty. Both low-carbon grades weld without sensitising.
Concentric or eccentric reducer?
A concentric reducer keeps the pipe centreline in line. An eccentric reducer keeps one side flat, which is used on pump suctions to stop air pockets forming, or on pipe racks to keep a level bottom of pipe.
- Matching SA312 stainless pipe
- Stainless flanges to ASME B16.5 and EN 1092-1
- Other schedules available on request
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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 butt weld fitting 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.