Positioning: Dimensional integrity and weldability that keep fabrication hours down and X-ray rejects near zero.
Standards & Types
- Butt-weld fittings: ASME B16.9 (elbows 45°/90°/180°, reducers, tees, caps)
- Forged SW/THD: ASME B16.11 (elbows, tees, couplings, unions)
- High-strength fittings: MSS SP-75 (wrought, for pipeline grades)
- Ends & prep: ASME B16.25 (butt-weld bevels)
Materials (typical)
- Carbon steel: ASTM A234 WPB/WPC; low-temp A420 WPL6
- Stainless: ASTM A403 WP304/304L/316/316L, duplex A815 S31803/S32205, super duplex S32750/S32760
- Alloy: ASTM A234 WP11/WP22; nickel alloys on request
Quality & NDE
- Heat/lot markings, PMI, dimensional inspection, bevel angle & land checks
- Optional UT/RT for critical weld seams; SF compliance per project ITP
Fittings RFQ Checklist
Type & standard, size & schedule, grade/MOC, quantity, NDE scope, documentation (3.1/3.2), packing (export crates, end caps).