TML & API 570
TML & API 570
(OP)
According to API 570 TMLs can be eliminated for piping systems if "Noncorrosive systems, as demnostrated by history or similar service, and systems not subject to changes that could cause corrosion".
How many isnpections do I need (without finding thinning) to do in order to drop a particular TML?
Any suggestions or guidelines?
Thanks,
How many isnpections do I need (without finding thinning) to do in order to drop a particular TML?
Any suggestions or guidelines?
Thanks,





RE: TML & API 570
Personally, I would say that if the TML in question is not consuming a wholly disproportionate amount of resources, and is not in such a situation as to give worthless reliability of measurement, then it would probably be considered an ALARP (as low as reasonably practicable) measure to continue to take readings and possibly just reduce the frequency.
Guidance on determining the number of measurements may be found at:
http://www.hse.gov.uk/research/rrpdf/rr016.pdf
Steve Jones
Materials & Corrosion Engineer
http://www.linkedin.com/pub/8/83b/b04