ISO 15614 is the international standard for welding procedure qualification for metallic materials. EN 10311 is a product standard that references ISO 15614 for welding, while adding pipeline-specific requirements (e.g., for fittings and on-site conditions).
┌────────────────────────────────────────┐ │ BS EN 10311 Joints │ └───────────────────┬────────────────────┘ │ ┌────────────────────────────┼───────────────────────────┐ ▼ ▼ ▼ Rigid Welded Mechanical & Flanged Threaded & Sealed (Butt / Spigot) (Bolted / Collars) (Tapered / Gaskets) Rigid and Welded Connections Bs En 10311 Pdf
To ensure compliance, companies should make the official PDF available to relevant teams, review the joint selection tables (Section 4) early in project design, define all relevant testing protocols per Section 7 (e.g., pressure, leak, and mechanical strength tests), and follow the evaluation of conformity in Section 8. The keyword "BS EN 10311 PDF" will be useful for future internal compliance audits. ISO 15614 is the international standard for welding