EN ISO 15614-7:2019 PDF

Overview

EN ISO 15614-7:2019 (ISO 15614-7:2016) specifies how a preliminary welding procedure specification (pWPS) for overlay welding is qualified by welding procedure tests. It defines the execution conditions for welding procedure tests, the required examinations and tests (NDT and destructive), and the range of qualification for overlay welding procedures within the variables listed in Clause 8. This part applies to all welding processes suitable for overlay, including corrosion‑resistant overlays and hardfacing. It is the reference for new procedure qualifications and coexists with previous editions (previous tests remain valid unless additional tests are required).

Key topics and requirements

• Preliminary WPS (pWPS): Requirements and information needed to prepare a pWPS for overlay welding.
• Welding procedure qualification test (WPQT): How to conduct the test weld(s) and what to record.
• Test piece: Shape, dimensions and welding of test pieces appropriate for overlay, including intermediate layers when required.
• Examination and testing:
  • Non‑destructive testing (NDT): Extent and acceptance criteria.
  • Destructive testing: Macroscopic examination, hardness testing, side‑bend tests, chemical analysis, ferrite content where applicable.
  • Acceptance criteria and re‑testing procedures.
• Range of qualification (Clause 8): Defines allowable variations covered by a single qualification (manufacturer, materials, filler designation, overlay thickness, welding process, position, current type, arc energy, preheat/interpass/post‑weld heat treatment, number of layers, etc.).
• Welding processes covered: Manual metal arc, submerged arc, electroslag overlay, gas‑shielded metal arc, TIG, plasma (including plasma transferred arc), oxy‑acetylene and others suitable for overlay.
• Special cases: Buttering for dissimilar materials is qualified under ISO 15614‑1; building‑up and repair follow ISO 15613 or ISO 15614‑1. Application standards may require additional tests.
• Welding Procedure Qualification Record (WPQR): Form and content to document the qualified procedure.

Applications and users

Who uses EN ISO 15614-7:

• Welding engineers and procedure developers qualifying overlay and hardfacing procedures
• Fabricators and shops performing corrosion‑resistant overlays or wear‑resistant hardfacing
• Manufacturers of pressure equipment (see Annex ZA relationship to PED 2014/68/EU)
• NDT technicians, QA/QC inspectors and third‑party examiners documenting compliance
• Specifiers and purchasers who require certified overlay welding procedures

Practical uses:

• Qualifying supplier welding procedures for cladding, corrosion protection and wear layers
• Demonstrating conformity for pressure‑equipment and safety‑critical components
• Establishing WPQRs to control production welding under an approved pWPS

Related standards

• ISO 15614‑1 - Welding procedure qualification for parent metal and buttering between dissimilar materials
• ISO 15613 - Qualification testing on pre‑production test pieces (building up/repair)
• Application standards and PED 2014/68/EU (as referenced in Annex ZA) may impose additional requirements

Keywords: EN ISO 15614-7, ISO 15614-7:2016, overlay welding, welding procedure qualification, pWPS, WPQR, hardfacing, corrosion resistant overlay, NDT, welding standards.