Pipe Fittings

Buttweld & Forged Pipe Fittings

Elbows, tees, reducers, caps, stub ends, couplings and unions for piping systems — in stainless, duplex, carbon and alloy steel and nickel alloys.

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Buttweld and forged pipe fittings
ASTM A403 · A234ASME B16.9
Buttweld & ForgedMatched to your pipe and schedule
4 TypesButtweld · Forged · Socket-weld · Threaded
ASMEB16.9 · B16.11
MTCEN 10204 3.1 / 3.2
Heat No.Marked and traceable
Overview

Fittings That Match Your Pipe, Grade and Schedule

A fitting has to match the pipe it joins — in grade, wall thickness and end type — or the whole line is compromised.

We supply buttweld fittings for welded pipework and forged fittings for small-bore, socket-weld and threaded lines. Every fitting is ordered by material, specification, size and schedule, and carries its heat number.

If you are not sure which type of fitting suits your piping class, share your pipe specification and we will help you match it.

  • Buttweld, socket-weld & threaded
  • Long and short radius elbows
  • Concentric & eccentric reducers
  • Schedule-matched to pipe
Product Range

Four Families of Fittings

The connection method decides the family; the piping class decides the grade and schedule.

01

Buttweld Fittings

Welded directly to the pipe end. The strongest, smoothest-flow joint, used for most process and utility piping.

Process lines, large bores
02

Forged Fittings

Forged from solid stock for high pressure in small bores. Supplied in socket-weld and threaded forms.

Small-bore, high-pressure lines
03

Socket-Weld Fittings

The pipe is inserted into a socket and fillet welded. Easy alignment for small-bore piping.

Instrument and utility lines
04

Threaded Fittings

Screwed onto threaded pipe ends, without welding. Quick to install and dismantle.

Low-pressure and utility lines
Specifications

Common Specifications We Supply Against

Governing standards for each material family. Tell us the one on your purchase order.

Material / ProductSpecificationTypical GradesNotes
Stainless buttweld fittingsASTM A403 / ASME SA403WP304 · WP304L · WP316 · WP316L · WP321Seamless (WP-S) and welded (WP-W)
Carbon & alloy buttweld fittingsASTM A234WPB · WPC · WP11 · WP22 · WP91Moderate and elevated temperature
Duplex buttweld fittingsASTM A815S31803 · S32205 · S32750Higher strength, chloride resistant
Nickel alloy fittingsASTM B366Alloy 600 · 625 · 825 · 400Corrosive and high-temperature service
Forged fittingsASTM A182F304 · F316 · F321 · F51 · F11 · F22Dimensions to ASME B16.11
Forged carbon steel fittingsASTM A105A105 · A350 LF2Ambient and low-temperature service

Dimensions: ASME B16.9 (buttweld), ASME B16.11 (forged), MSS SP-43 (stainless stub ends). Availability depends on grade and size.

  • Grades we supply:
  • SS 304 / 304L
  • SS 316 / 316L
  • SS 321
  • SS 310S
  • Duplex 2205
  • Super Duplex 2507
  • Carbon Steel A234 WPB
  • Alloy Steel WP11 / WP22 / WP91
  • Inconel 625
  • Incoloy 825
  • Monel 400
  • Hastelloy C276
Fitting Types

Common Fittings at a Glance

The parts you will see on most piping bills of material.

FittingVariantsWhat it does
Elbow90° · 45° · 180° return; long radius (1.5D) & short radius (1D)Changes direction of the line.
TeeEqual · reducingCreates a branch from the main line.
ReducerConcentric · eccentricJoins pipes of different sizes.
CapButtweld · socket-weldCloses the end of a pipe.
Stub endLong · short patternUsed with a lap-joint flange.
Coupling · Union · NippleFull · half · threadedJoins or extends small-bore lines.
Applications

Where Pipe Fittings Are Used

The industries that most often specify this product.

  • 01Oil & Gas
  • 02Chemical & Petrochemical
  • 03Power
  • 04Pharma & Food
  • 05Marine & Offshore
  • 06Water & Desalination
  • 07Fire & Building Services
  • 08Skid & Fabrication
Enquiry Checklist

Six Details Make a Complete Enquiry

Send these with your request and we can quote without going back and forth.

  1. 1

    Fitting type

    Elbow, tee, reducer, cap, stub end, coupling or union.

  2. 2

    Material & grade

    For example WP316L, A234 WPB or F304.

  3. 3

    Specification

    ASTM, and the dimensional standard such as ASME B16.9.

  4. 4

    Size & schedule

    NPS and schedule, or wall thickness; for reducers, both sizes.

  5. 5

    End type

    Buttweld, socket-weld or threaded, and pressure class for forged parts.

  6. 6

    Documents & testing

    MTC 3.1 or 3.2, PMI or third-party inspection.

Certificates & Testing With Every Order

Mill test certificates to EN 10204 3.1 / 3.2, PMI, hydro and NDT testing, and third-party inspection can be arranged. Read how every order is checked.

Quality Policy
FAQ

Pipe Fittings: Common Questions

Still have a question?

Our team can help you choose the right grade, size and specification.

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A long radius elbow has a bend radius of 1.5 times the nominal pipe size; a short radius elbow has a radius equal to the nominal size. Long radius gives smoother flow and lower pressure drop and is the usual choice, while short radius saves space.

Forged fittings are normally used for small-bore pipework (typically up to NPS 4) and for high-pressure service, in socket-weld or threaded form. Buttweld fittings are used for most welded process piping, especially in larger sizes.

They are the pressure ratings of forged socket-weld and threaded fittings under ASME B16.11. The classes mainly differ in wall thickness: a higher class means a thicker, stronger body. Threaded fittings are made in classes 2000, 3000 and 6000.

Yes — fittings are supplied with a mill test certificate. Ask for EN 10204 3.1 or 3.2 and mention PMI or third-party inspection when you enquire. See our Quality Policy.