Disclaimer: This article is for informational purposes. Always consult the official EN ISO 15614-7:2021 standard for technical procedures.
Based on industry feedback, here are frequent errors companies make when applying EN ISO 15614-7:
: Clause 8 outlines how a qualified procedure can be applied to different parent materials, thicknesses, and welding positions. Buttering Guidance
Positions are restricted because gravity affects pool control and dilution rates during overlaying. en iso 15614-7 pdf
Detecting microscopic surface-breaking flaws.
Cladding carbon steel vessels with stainless steel or nickel alloys in chemical plants.
: A micro-meteorite had stripped the protective stellite coating off the Icarus-9 's primary thruster housing. Without the overlay, the acidic clouds would dissolve the engine in hours. Disclaimer: This article is for informational purposes
Destructive testing verifies the hidden qualities of the overlay weld:
While older drafts might be found online (e.g., prEN ISO 15614-7:2002 ), always prioritize the published 2021 edition. Summary Table: EN ISO 15614-7 Highlights Requirement Title Overlay welding procedure test Scope Metallic materials overlay Latest Major Revision Key Tests Visual, NDT, Hardness, Chemical Analysis Crucial Parameter Dilution Control
+-------------------------------------------------------+ | 1. Prepare Preliminary Welding Procedure Spec (pWPS) | +-------------------------------------------------------+ | v +-------------------------------------------------------+ | 2. Weld the Test Piece ( witnessed by Inspector) | +-------------------------------------------------------+ | v +-------------------------------------------------------+ | 3. Execute NDT & Destructive Testing (Lab Evaluation) | +-------------------------------------------------------+ | v +-------------------------------------------------------+ | 4. Issue Welding Procedure Qualification Record (WPQR)| +-------------------------------------------------------+ 1. The Test Piece (Coupon) : A micro-meteorite had stripped the protective stellite
In the world of fabrication and manufacturing, the integrity of a weld is often the difference between a safe product and a catastrophic failure. While many are familiar with standard arc welding qualifications, specialized joining methods require equally specialized standards.
: This is the core of the standard. The prepared test piece undergoes a series of rigorous tests to verify the quality of the weld overlay:
: It defines the exact conditions for carrying out tests and establishes the "range of qualification"—essentially the boundaries within which a welding procedure remains valid once tested. Exclusions
The benefits of EN ISO 15614-7 include:
You can purchase the current BS EN ISO 15614-7:2021 (or the latest version relevant to your country, such as DIN EN ISO 15614-7) from recognized distributors like BSI, DIN, or ISO.