En Iso 15614-7 Pdf 'link' -
| | Qualification Limits | |---|---| | Welding process | Restricted to the process(es) used in the test. When multiple processes are used, they must be applied in the same order as in the test. | | Welding position | Restricted to the position tested, except that position PC qualifies position PA (flat position). | | Type of current | Restricted to the specific current type (AC, DC, pulsed) and polarity used. | | Arc energy | For the first and second layers, variations must be within ±25% of the tested arc energy. For subsequent layers, only a +25% increase is permitted. | | Preheating temperature | Any decrease in preheat temperature below the tested value is not permitted. | | Interpass temperature | Any increase above the tested value is not permitted. Minimum temperature is the preheat temperature or tested interpass temperature, whichever is lower. | | Post‑weld heat treatment (PWHT) | PWHT is qualified within specific ranges of time, temperature, heating rate, and cooling rate. Any variation outside these ranges requires requalification. | | Number of layers | A reduction in the number of layers is not permitted. |
If you are currently setting up a welding qualification program, tell me more about your project goals: What and overlay alloy are you using?
: Substrates are divided based on ISO/TR 15608 groupings . Qualifying on a group with high carbon equivalence doesn't automatically qualify a lower group if heat treatment properties differ. en iso 15614-7 pdf
Providing a transition layer between dissimilar metals. Build-up: Restoring dimensions to a worn part. Latest Version: EN ISO 15614-7:2019
Understanding EN ISO 15614-7: The Standard for Overlay Welding EN ISO 15614-7 | | Qualification Limits | |---|---| | Welding
The standard's power lies in its structured approach to validating a welding procedure. The flowchart below outlines the key steps:
In practice, EN ISO 15614-7 is often used in conjunction with other standards. For example, while Part 7 qualifies the cladding deposit itself, the final structural weld joining the clad component to another part would be qualified under ISO 15614-1. | | Type of current | Restricted to
To pass the qualification, the test piece must undergo rigorous non-destructive and destructive testing [3]. The EN ISO 15614-7 PDF outlines requirements for:
The standard provides a specific range of qualification for parent metal and thickness . For parent metal thickness (t), the qualification range is:
