En Iso 15614-7 Pdf -

It applies to all arc and gas welding processes suitable for surfacing. Essential Requirements for Qualification

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Imagine a heavy-duty chemical reactor designed to hold highly corrosive acid. The base metal of the reactor is strong enough to hold the pressure, but it would dissolve in minutes without a special protective lining. To save the vessel, engineers decide to use overlay welding (also known as cladding or hardfacing). It applies to all arc and gas welding

The standard defines "essential variables"—parameters that, if changed beyond a certain range, require re-qualification. These include: The base metal of the reactor is strong

The scope of EN ISO 15614-7 includes:

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