Discussion on GB/T 3533-2013 \"Construction and Acceptance of Water Supply and Drainage in Petrochemical Industries\"
Thread Content
I would like to ask the experts: According to GB/3353-2013, 10% of steel pipes are to be inspected by random sampling for non-destructive testing. For pipes with a diameter smaller than DN500, inspection is carried out based on the proportion of weld joints; for pipes with a diameter of DN500 or larger, inspection is done based on the length of the welds. The length of each sample taken for inspection must be at least 250 mm. If sampling is done at 10% of the weld ratio, how should it be represented in a single-line diagram? (Indicate the RT testing location for this connector, or simply mark it as an RT-testing connector)
10% sampling does not mean sampling 10% based on the proportion of welds; these are two different concepts. And when is RT indicated on the single-line diagram? Can that still be called sampling?