Stainless steel butt-weld fittings for welded pipe runs. Review the full variety below; a listed form is a specification pathway, not a promise that every grade, size or pattern is in stock.
Grades and material identification
Ask about 304/304L, 316/316L, 321, 310/310S, 904L and duplex grades such as 2205, where the product form and applicable material standard support them. For butt-weld fittings, ASTM A403 covers common austenitic grades; duplex material may call for ASTM A815. Forged fitting material standards vary (for example, ASTM A182 for suitable forged grades). The grade name alone does not establish a certificate or product standard. Confirm the actual heat, certificate and service requirements.
Fitting varieties
| Form | Typical variants | What to specify |
|---|---|---|
| Elbows: 45°, 90°, 180° returns | Long-radius and short-radius where the dimensional standard covers the form. | NPS, angle, LR/SR, schedule, bevel; ASME B16.9. |
| Tees and crosses | Equal and reducing branches; crosses subject to the applicable drawing and standard. | Run and outlet NPS, wall/schedule and branch orientation. |
| Reducers | Concentric or eccentric; choose eccentric orientation for line drainage/clearance. | Large/small-end NPS, wall at both ends and end preparation. |
| Caps and stub ends | End closures, lap-joint stub ends (short/long pattern as specified). | NPS, wall, stub-end type/length, matching flange face. |
| Bends and return bends | Long-radius pipeline bends; 180° returns under applicable dimensional rules. | Bend angle, center-line radius, tangent length, ovality and drawing. |
| Laterals and custom branches | Fabricated/wrought branch geometry where the project calls for it. | Branch angle, reinforcement/design code, drawing and inspection. |
Size, wall and rating
ASME B16.9 gives dimensions for many factory-made wrought butt-weld forms; its published scope is NPS 1/2 through NPS 48, but a particular fitting, grade and wall may have a narrower available range. Specify NPS or DN, wall schedule/thickness, end bevel and tolerances. MSS SP-43 is a distinct low-pressure corrosion-resistant fitting practice; it is not interchangeable with B16.9 for every service. Do not assume a pressure class from size alone.
Send a complete enquiry
Include material grade and product material standard; form and connection; size of every end; schedule or wall thickness; pressure class or design pressure/temperature; finish and tolerance; quantity; requested certificate/inspection; and delivery destination. For fabricated bends, outlets and unusual patterns, attach a dimensioned drawing. We check actual stock, feasible sourcing and paperwork for the item quoted.
Standard scope references
Catalogue reference: Butt-weld fittings
Catalogue size: seamless 1/2–24 in; welded 4–60 in; schedules 5–XXS. Elbows, tees, cross tees, reducers, caps and stub ends; it highlights stub ends. Dimensional references: ASME B16.9, ASME B16.28 and MSS SP-43 as applicable.
Listed material families include 304/304L, 316/316L, 904L, duplex S31803/S32205, super duplex S32750/S32760, SMO 254/S31254, carbon steel WPB/WPHY, alloy steel, nickel alloys, copper-nickel and titanium.
Metalex catalogue (2022) describes a product range, not real-time stock or a test certificate. Confirm grade, dimensions and documentation for your enquiry.
Discuss a specification
We can check availability, documentation and size against your purchase requirement.
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