17660-1 Pdf | En Iso

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This is the most referenced section by site engineers. The standard provides specific "Acceptance Criteria" for visual defects. It tells you exactly what is allowed and what is a reject:

A: If the weld is only for assembly (tack welding) and not for final load transfer, you use Part 2. For cross-welded fabric used as main reinforcement, you use Part 1.

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Organizations like The Welding Institute (TWI) in the UK or the American Welding Society (AWS) offer members discounted standards. If you are a member, log in to access library copies of EN ISO 17660-1 PDF.

For thicker bars or cold climates, the standard mandates preheating. The PDF includes tables showing minimum preheating temperatures based on carbon equivalent (CEV) and bar diameter.