ISO 2553 welding symbols: scope, limits and what to ask
What ISO 2553 welding symbols define on a drawing, where the standard stops, and the four fields that decide whether a 3 mm fillet is 4.5 or 9 mm² of weld.
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Topic hub · 30 guides
Standards and compliance
Standards are only useful when you know their scope. ISO 2768 does not cover welded assemblies; ISO 13920 does. IEC 62208 covers an empty enclosure, IEC 61439 covers the assembly inside it. This cluster explains what each standard covers, where it stops, and the document a buyer should expect at first article and at audit.
Guides in this topic, page 2
Which standard applies, what it actually covers, and the evidence a buyer should ask for: ISO, IEC, EN, RDSO and material certification.
IS 3043 for earthing: scope, limits and what to ask for
IS 3043 covers electrodes and earthing practice, not a single ohm target. The bond continuity number on an enclosure comes from the customer or IEC 60364.
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First article inspection: what FAI proves and what it does not
First article inspection explained: the three AS9102 forms, why a 30-piece sample proves less than buyers think, and the evidence to request with the report.
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IP ratings for enclosures: scope, limits and what to ask for
An IP rating is a test result on an assembled enclosure, not a property of a folded box. The jet flows, the gasket load and the door stiffness that decide it.
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IEC 60297 for 19-inch mechanical structures: scope and limits
IEC 60297 19-inch mechanical structures explained: 482.6 mm width, 465.1 mm hole centres, 44.45 mm pitch, the tolerance stack that decides fit, and where the standard stops.
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Calibration and measurement traceability for sheet metal
What a calibration certificate proves, how the 4:1 rule decides which gauge can check which tolerance, and the records an auditor asks to see.
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ISO 2409 for cross-cut adhesion: scope, limits and what to ask for
ISO 2409 cross-cut adhesion explained: the cut spacing that depends on film thickness, the Gt scale, where the test stops, and what to write on the drawing.
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Certificate of conformity: scope, limits and evidence
A certificate of conformity declares, it does not measure. What the CoC names, what sits behind it, and which characteristics need a record with values instead.
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ISO 12944 corrosion protection: scope, limits, film build
ISO 12944 corrosion protection explained: corrosivity categories C1 to CX, the film build each needs, durability classes, and why sheet-metal enclosures differ.
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