Electrical continuity in composite hoses

Technical explanation

During the source review, different continuity acceptance values were found in different accessible guides from the same manufacturer. For this reason, no universal resistance threshold should be given independently of the product and the measurement method. The measurement points, fitting contact, instrument and product series must be defined together. Passing a continuity measurement does not on its own prove that the hose is mechanically or chemically sound. Electrical checks and visual and mechanical inspection produce separate results.

Source: S041, S042

Topic-specific checkpoints

Source: S041, S042

How is it assessed in practice?

In the test plan, clearly write the product code, assembly number, instruction revision and the source of the acceptance criterion. If two documents give different values, do not choose the one that is easier to pass; obtain a written clarification from the manufacturer for the assembly concerned. Record the measurement result not just as 'passed' but with the instrument and conditions used. Do not automatically carry over the previous result after a change made to the ends. This approach aims to create comparable records without copying one product's limit to other products.

Original editorial recommendation; not a clause of a standard.

Frequently asked questions

Can I use a single ohm limit found on the internet?

You should not use it without verifying it against the product concerned and the current instructions. If sources conflict, this must be resolved separately.

Source: S041, S042