Fluid, piping & valves
Pipe fittings and flanges
Pipe fittings and flanges for process and utility piping, from butt-weld and forged fittings to slip-on, weld-neck, blind and threaded flanges, in stainless, carbon, duplex and other alloy steels.
Overview
Pipe fittings change direction, branch the flow, change diameter or close a line: elbows, tees, wyes, crosses, reducers, couplings, unions, caps and plugs. They are supplied as butt-weld fittings for larger welded lines, forged socket-weld and threaded fittings for small bore, and OD tube or NB pipe fittings with threaded ends. Flanges allow pipework and equipment to be bolted together and dismantled. The range includes slip-on raised-face, weld-neck, blind, threaded, socket-weld, lap-joint and split flanges, made to customer drawings or to ASME, EN and JIS dimensional standards. Push-in tube fittings and beaded hose fittings are also available.
Selecting pipe fittings and flanges
Start with the piping specification: nominal size, wall schedule or pressure class, material grade and end connection. For flanges, also state the dimensional standard, facing (raised or flat face) and bolt pattern. Material follows the media and temperature; duplex and other alloys are considered for chlorides or aggressive chemicals.
Range overview
- Types and variants
- Butt-Weld Fittings
- Forged Socket-Weld Fittings
- Forged Threaded Fittings
- OD Tube and NB Pipe Fittings
- Push-In Tube Fittings
- Slip-On Raised Face Flanges
- Weld-Neck Flanges
- Blind Flanges
- Threaded Flanges
- Split Flanges
- Materials and grades
- SS 304
- SS 304L
- SS 316
- SS 316L
- Carbon Steel
- Mild Steel
- Duplex 2205
- Brass
- Chrome-Plated Steel
- Size range
- OD Tube and NB Pipe Fittings: 1/4 in to 3 in Thread
- Duplex Butt-Weld Fittings: 1/2 in to 24 in NB
- Duplex Flanges: 1/2 in to 24 in
- Pressure / temperature
- Flanges (duplex range): Class 150, 300, 600, 900, 1500, 2500
- Flanges (duplex range): PN6, PN10, PN16, PN25, PN40, PN64
- Connections and interfaces
- Butt-Weld
- Socket-Weld
- Threaded
- Flanged Raised Face
- Flanged Flat Face
- Push-In
- Standards referenced
- ASME B16.9
- ASME B16.5
- MSS SP-43
- EN 1092-1
- ASTM A182
- ASTM A105
- Features
- Standard and Customer-Specified Configurations
- Wide Choice of Alloys
Exact specifications depend on the variant, material and size. Confirm ratings and certification against the datasheet or with our engineers before ordering.
Applications
- Process Piping
- Pipeline Engineering
- Plant Engineering
- Gas Lines
- Hydraulic Lines
- Wastewater
Industries
- Oil and gas
- Chemical
- Petrochemical
- Power generation
- Marine
- Food processing
- Pharmaceutical
Information that speeds up a quotation
Share what you know. Anything you are unsure of can be marked “not known” — our engineers will help confirm it.
- Nominal size
- Pressure class
- Material
- End connection
- Standard
- Temperature
- Media
- Drawing
- Certification
Need a datasheet?
Add this family to your enquiry list and mention the variant — we will send the relevant technical documents.
Piping and hydraulic connections
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Frequently asked questions
What information is needed to quote for flanges?
State the flange type (weld-neck, slip-on, blind and so on), nominal size, pressure class or PN rating, dimensional standard, facing, material grade, and the bore or schedule for weld-neck types. Add quantities and any inspection or documentation requirements. You can request material test certificates with the supply.
When are butt-weld fittings preferred over forged socket-weld fittings?
Butt-weld fittings are typical for larger pipe sizes and where a smooth, full-penetration weld and full bore are wanted. Forged socket-weld and threaded fittings are typical for small-bore lines where fit-up is simpler. The piping specification for your project usually defines which to use at each size.
Ready to specify pipe fittings and flanges?
Send the details you have — quantities, sizes, drawings or a part number. Unknowns are fine.