To develop and validate cladding procedures.
This article provides everything you need to know about the standard, from its technical requirements to where and how to purchase the official PDF document for your business.
: Specifies the required dimensions and types of test pieces that must be welded to prove the procedure. Examination and Testing : Detailed requirements for both Non-Destructive Testing (NDT) —like visual or ultrasonic testing—and destructive testing to verify the overlay's integrity. Variables (Clause 8)
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Investing in the official standard is not just a legal requirement—it is a commitment to quality, safety, and professional integrity in every weld that leaves your workshop. en iso 15614-7 pdf
: The qualified thickness range depends directly on the test piece overlay thickness.
The EN ISO 15614-7 applies to all welding processes suitable for overlay, including:
Because overlay welding does not involve joining two separate pieces, the qualification tests and acceptance criteria are different from those used in conventional butt welding. That's why Part 7 of the ISO 15614 series exists alongside the more widely known Part 1 (arc and gas welding of steels).
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The standard outlines a structured process for ensuring weld quality: Test Pieces
is a European standard (adopted from the international ISO standard) titled: "Specification and qualification of welding procedures for metallic materials - Welding procedure test - Part 7: Overlay welding."
In simpler terms, this standard tells you exactly how to prove—through destructive and non‑destructive testing—that your proposed welding procedure for applying a layer of material onto a base metal will consistently produce sound results.
Global projects often compare European/International standards (ISO) with American standards (ASME). While ASME Section IX handles corrosion-resistant and hard-facing overlay qualification under variables QW-214 and QW-216, EN ISO 15614-7 is often considered more prescriptive regarding specific testing locations, mandatory hardness limitations, and stricter parent material groupings. Compliance with one does not automatically guarantee compliance with the other, meaning separate qualifications are often required for dual-certified workshops. Summary for Implementation Implementing EN ISO 15614-7 requires a systematic approach: Examination and Testing : Detailed requirements for both
Buttering (a layer deposited to isolate the base metal) requires specific tests under Clause 8 of the standard.
The standard qualifies essential variables—parameters that significantly affect weld quality—within defined limits. A change beyond these limits typically requires requalification.
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