SIST EN ISO 15614-12:2022 PDF

Overview

EN ISO 15614-12:2021 - "Specification and qualification of welding procedures for metallic materials - Welding procedure test - Part 12: Spot, seam and projection welding" (CEN endorsed) specifies the tests and acceptance criteria used to qualify welding procedure specifications (WPS) for resistance welding. It defines conditions for carrying out qualification tests, the limits of validity of a qualified procedure and is written primarily for embossed projection welding (adaptable to solid projections such as nut, stud and cross‑wire welding).

Keywords: EN ISO 15614-12:2021, welding procedure qualification, spot welding, seam welding, projection welding, resistance welding, WPS, WPQR.

Key topics and technical requirements

• Scope of processes covered - Resistance welding types as per ISO 4063, including:
  • 21 resistance spot welding (211 indirect, 212 direct)
  • 22 resistance seam welding (221–226 variants)
  • 23 projection welding (231 indirect, 232 direct)
• Test programme elements - Requirements for preliminary WPS (pWPS), welding procedure test pieces, specimen shapes/dimensions, macrosections and destructive testing.
• Examination and testing - Visual inspection, destructive tests (e.g., torsion tests referenced in ISO 17653), cutting locations for specimens, and re‑testing rules.
• Range of qualification - Defines what aspects a single qualification may cover, including:
  • manufacturer and equipment limits
  • material families and thickness ranges
  • welding process, type of current, welding cycle
  • pre/post‑weld heat treatment and electrode specifications
• Documentation - Preparation of a Welding Procedure Qualification Record (WPQR) capturing tested parameters and limits of validity.

Practical applications and users

• Intended users:
  • Welding engineers, QA/QC managers, and procedure writers
  • Fabricators and manufacturers in automotive, electronics, appliance and general sheet‑metal industries
  • Inspection bodies and testing laboratories that perform WPS/WPQR qualification
• Typical applications:
  • Qualifying spot welds for car body assemblies and battery pack joints
  • Validating seam welds for fuel tanks, containers and HVAC ducts
  • Establishing projection weld procedures for nut/stud attachment on assemblies
• Benefits:
  • Ensures consistent, reproducible resistance welding quality
  • Provides documented limits for production transfer and auditability

Related standards

• ISO 15607:2019 (general rules for welding procedure qualification)
• ISO 15609-5:2011 (WPS - resistance welding)
• ISO 669:2016 (resistance welding equipment requirements)
• ISO 17677-1:2019 (resistance welding vocabulary)
• ISO 17653 (destructive tests on resistance spot welds)
• ISO 4063 (welding process classification)

EN ISO 15614-12:2021 is the current edition (superseding the 2014 version) and should be used for new qualifications in the covered resistance welding processes.