ASTM, SSPC(AMPP), ISO and NIST — the complete standards system for coating thickness and wall-thickness measurement, with edition numbers, core clauses, scope of application and common misuses.
ISO 12944 is a set of 9-part specifications for anti-corrosion paint systems on steel structures: Part 2 defines atmospheric corrosivity categories C1 (very low) to C5 (very high industrial/marine) and…
ASTM D6132-13(2022) specifies the nondestructive measurement of applied organic coatings using an ultrasonic coating thickness gauge, aimed specifically at non-metallic substrates (plastic, wood, FRP, concrete, glass) — substrates where magnetic…
A calibration certificate is the pass to get a coating thickness gauge onto a professional procurement list. US standards require dry-film gauges to carry a certificate traceable to a national…
ASTM D7091-22 is a Standard Practice that specifies calibration, verification, adjustment and measurement for magnetic and eddy-current coating thickness gauges. It supplements rather than replaces the manufacturer manual, and is…
SSPC-PA 2-2022 is the US painting acceptance procedure. It specifies the number of spots by coated area, the reading requirement per spot, and pass/fail judgment based on the 80/20 rule.…
The 80/20 rule is the shared acceptance method of SSPC-PA 2 and ISO 19840: the area mean ≥ nominal thickness, fewer than 20% of readings in the 80%-100% nominal band,…
ISO 2178:2016 specifies the magnetic method for measuring the thickness of non-magnetic coatings (paint, galvanizing, powder, enamel, etc.) on magnetic substrates (steel, iron); the Chinese equivalent is GB/T 4956. It…
ISO 2360:2017 specifies the amplitude-sensitive eddy-current method for measuring non-conductive coatings (paint, anodized film, plastic, powder, enamel) on non-magnetic conductive metal substrates (aluminium, copper, brass, austenitic stainless steel); the Chinese…
ISO 2808:2019 is the umbrella specification for paint film thickness determination, bringing all measurement methods for wet film, dry film, uncured powder coatings and coatings on rough surfaces into one…
ISO 19840:2012 specifies thickness measurement and acceptance criteria for coatings on rough steel surfaces. Like SSPC-PA 2-2022 it shares the 80/20 judgment logic, but differs in spot count, roughness correction…
