Overview
EN ISO 13703-2:2023 - "Oil and gas industries including lower carbon energy - Piping systems on offshore platforms and onshore plants - Part 2: Materials" - is a harmonized CEN/ISO standard that defines unified requirements and pre‑qualification criteria for metallic piping materials used in upstream oil, gas and lower‑carbon energy facilities. It covers material quality levels and procurement specification elements for seamless and welded pipes, wrought fittings, plates, forgings, bars, castings and piping bolts/nuts for both offshore platforms and onshore plants.
Key topics and requirements
- Material scope: C‑Mn steel, high‑strength steel, austenitic and duplex stainless steels, nickel alloys, Cu‑Ni alloy, titanium alloys and other Cu‑alloys.
- Material and element datasheets: Annex A (material datasheets) and Annex B (element datasheets) provide standardized specification templates for procurement and inspection.
- Pre‑qualification and manufacturer requirements: References qualification of manufacturers and suppliers (e.g., ISO 17782, NORSOK M‑650) and sets expectations for supplier control.
- Inspection and testing: Addresses mechanical testing, non‑destructive testing (NDT) for piping and valves, pilot castings and related acceptance criteria; includes guidance on machining valve parts from bar stock.
- Service coverage: Applicable to normal and high pressure systems and to sour environments as defined in ISO 15156 (ANSI/NACE MR0175 accepted as equivalent).
- Interoperability with codes: Notes deviations or interfaces with ASME B31.3 and parts designed to ASME BPVC VIII Div. 2; includes guidance relevant to the European Pressure Equipment Directive.
- Exclusions: Does not give material selection guidance, and excludes subsea production systems, downhole equipment and transportation pipelines designed under separate pipeline codes.
Practical applications and users
EN ISO 13703-2:2023 is designed for practical use by:
- Piping engineers and materials engineers creating material specifications for process piping on offshore and onshore facilities.
- Procurement and quality teams preparing purchase orders and material datasheets for pipes, fittings, flanges, fasteners and castings.
- Fabricators and welders who must meet material pre‑qualification, mechanical testing and NDT requirements.
- Inspection, certification and project assurance bodies assessing material conformity for production, processing and gas liquefaction plants.
- Asset owners and EPC contractors aligning material specifications across international projects and regulatory environments.
Related standards
- ISO 13703 series (Parts 1 and 3)
- ASME B31.3 (process piping)
- ISO 15156 / ANSI/NACE MR0175 (sour service)
- ISO 17945 / ANSI/NACE MR0103
- ISO 17782, NORSOK M‑650 (manufacturer qualification)
- ASME BPVC VIII Div. 2
- ISO 14692 (non‑metallic piping) - (not covered by this part)
Keywords: EN ISO 13703-2:2023, piping systems, oil and gas, materials, material datasheets, offshore platforms, onshore plants, stainless steel, duplex, nickel alloy, NDT, ASME B31.3.