You have three options: (a) Reject the procedure and start over. (b) Add another pass to reduce dilution (if the test piece allows). (c) Change parameters to lower heat input. You cannot "repair" a failed test without a new test piece.
Always ensure your quality team is working with the latest EN ISO 15614-7:2019 when preparing documentation for new projects.
All sample coupon construction must be actively witnessed by an approved independent third-party examiner or an accredited examining body. The witness verifies that all variables strictly match the initial variables defined on the pWPS. Non-Destructive and Destructive Testing Requirements
[ preliminary WPS (pWPS) ] │ ▼ [ Test Piece Preparation & Welding ] ──► Witnessed by Independent Examiner │ ▼ [ Non-Destructive Testing (NDT) ] │ ▼ [ Destructive Destructive Testing ] ──► Macro, Chemical, & Hardness Analysis │ ▼ [ Final Qualification Record (WPQR) ] ──► Establishes Production Boundaries 1. Formulating the Preliminary WPS (pWPS)
No. The 2016 edition (and its later national adoptions) . However, if the new edition introduces additional tests, you may need to perform only those extra tests on a test piece made in accordance with the existing WPS. en iso 15614-7 pdf
Ensuring full volumetric bonding between the overlay and the parent metal, and checking for sub-surface slag or voids. Destructive Testing
To successfully qualify your overlay welding procedure according to EN ISO 15614-7, keep these expert tips in mind:
To verify the composition of the overlay layer (e.g., ensuring adequate chromium or nickel content). How to Access the EN ISO 15614-7 PDF
The tests generate the data required to fill out the WPQR. You have three options: (a) Reject the procedure
The scope of EN ISO 15614-7 includes:
: Applies to all welding processes suitable for overlaying (e.g., surfacing, cladding). Current Edition : The most recent version is EN ISO 15614-7:2019 (published in early 2020). Test Pieces
The minimum and maximum allowable thickness.
The standard qualifies essential variables—parameters that significantly affect weld quality—within defined limits. A change beyond these limits typically requires requalification. You cannot "repair" a failed test without a new test piece
Qualifying a welding procedure under EN ISO 15614-7 follows a strict technical workflow to ensure absolute consistency and safety.
To confirm the chemical composition of the overlay, particularly the chromium/nickel ratio for corrosion resistance. Where to Find the EN ISO 15614-7 PDF
This standard applies to all welding processes suitable for overlaying, including: Corrosion-resistant overlays : Protecting base metals from chemical degradation. Hardfacing : Increasing resistance to wear and impact. : Creating a transition layer between dissimilar materials. : Restoring dimensions to parent metals.
The journey begins by outlining all critical manufacturing parameters inside a preliminary Welding Procedure Specification (pWPS). This document outlines intended chemical compositions, required thickness limits, shielding compositions, and thermal management metrics. 2. Preparing the Standard Test Coupons