Testing hub

Testing and standards, explained.

Which test answers which question, which standard sits behind it, and what a report should show. Original summaries, with the standard named so you can read the real thing.

Start with the duty

Find the test by what the seal faces

Oil and gas qualification

ISO 23936-2 and NORSOK M-710 are the usual references for elastomers in production service. API equipment standards reach the rubber through material and temperature classes.

Briefing  |  Standards

Rapid gas decompression

Why seals blister when pressure drops fast, how the test is run and rated, and what a complete report shows.

Briefing  |  Guide

Sour service

Hydrogen sulfide and amines attack rubbers in different ways. See how ageing in sour fluids is set up and judged.

Briefing  |  Guide

Drinking water and food contact

NSF/ANSI 61, WRAS, KTW, FDA and others. Approvals belong to a formulation, a manufacturer and a facility.

Briefing  |  Standards

Fluids, swell and ageing

How to test in oils, fuels and water, and how to read swell, hardness change and compression set after ageing.

Guide  |  Calculator

Cure, viscosity and consistency

The rheometer curve, Mooney viscosity and the trend charts that show a batch drifting before it fails.

Guide  |  Guide

Using these pages. Our summaries are written in our own words from public sources and standards. They are not copies of the standards and not a substitute for them. Parameters and acceptance levels change between editions, so buy and read the current edition before you quote or rely on a figure. Where public sources disagree, the briefings show both values.