Positioning: Mill sources you can audit, with predictable chemistry and ovality—so your hydro and PWHT windows stay on schedule.
Manufacturing Routes
- Seamless (SMLS): hot-finished/cold-drawn for high P/T services
- ERW/EFW: cost-effective for utility/process lines
- SAW (LSAW/SSAW): large diameters for pipelines and water lines
Dimensional Standards
- ASME B36.10M (carbon & alloy), ASME B36.19M (stainless)
- End finishes: BE/PE; bevels per ASME B16.25
Material Standards (examples)
- Carbon steel: ASTM A106 Gr. B/C, A53, API 5L (B, X42–X70)
- Alloy steel (HT): ASTM A335 (P11/P22/P91)
- Stainless & duplex: ASTM A312 (304/316/321/347), A790/A928 (duplex/super duplex)
- Low-temp: ASTM A333 (LTCS)
Coatings & Linings
- External: FBE, 3LPE/3LPP, galvanizing (ASTM A123)
- Internal: epoxy, cement mortar, glass-flake per service
Testing & QA
- Hydrostatic test (per spec), NDE (UT/ET) ASTM E213/E309, dimensional & visual, PMI
- Sour-service/NACE declaration where specified
Pipes RFQ Checklist
Spec (e.g., A106 Gr. B SMLS), NPS & Schedule (or OD×WT), length (R/L/D-R/L), MOC, coating/lining, NDE, docs (3.1/3.2), delivery terms.