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Carbon Steel Piping

Pipe, fittings & flanges.

Clean, new carbon steel products specified by manufacturing method, grade, nominal size, wall schedule, fitting type and pressure class.

Visual product guideCarbon steel products, sizes and applications

See a separate, complete image for pipes, butt-weld fittings, forged fittings and flanges.

Open Carbon Steel Guide
Piping Package

Built from a coordinated specification.

Pipe, fittings and flanges are offered against the same service conditions and dimensional standard. Mill certificates, origin and testing requirements should be stated in the RFQ.

  • Seamless pipe
  • ERW / HFW pipe
  • Butt-weld fittings
  • Threaded forged fittings
  • Socket-weld forged fittings
  • Weld-neck flanges
  • Slip-on flanges
  • Blind flanges
Indicative Supply Guide

Standards, grades & sizes.

The table supports RFQ preparation. Exact availability depends on the selected standard, grade, schedule and manufacturer.

Finish: Product imagery shows clean commercial stock. Carbon steel may be supplied black, bare, primed, galvanized or coated only when the specification calls for it—never with decorative rust.

Carbon steel product coverage

ProductCommon specification basisIndicative range
Seamless pipeASTM A106 Gr B / ASTM A53 Gr B / API 5L Gr BNPS ½–24; schedules by standard
ERW / HFW pipeASTM A53 Gr B / API 5LNPS ½–20; larger by manufacturer
Butt-weld fittingsASTM A234 WPB / ASME B16.9NPS ½–24; wall to suit pipe
Forged threaded fittingsASTM A105 / ASME B16.11NPS ¼–4; Class 2000/3000/6000 by item
Forged socket-weld fittingsASTM A105 / ASME B16.11NPS ¼–4; Class 3000/6000; Class 9000 by item
FlangesASTM A105 / ASME B16.5NPS ½–24; Class 150–2500
Large-diameter flangesASME B16.47 where specifiedBy project enquiry

Wall schedules

DesignationUse in enquiry
Sch 10 / 20 / 30Light-wall options only where permitted by standard and design
Sch 40 / STDState both nominal size and schedule; do not rely on visual thickness
Sch 80 / XSHeavier wall for applicable pressure and service design
Sch 120 / 160 / XXSLimited by size and manufacturer; quote against exact requirement

Nominal pipe sizes

½¾11¼1½22½345681012141618202224 in
Availability: A size appearing here means it falls within the enquiry range, not that every grade and schedule is locally stocked.
Carbon Steel RFQ

Specify grade, schedule, size & quantity.

Request a Quotation
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