Calculation of pipeline flaw detection ratio
Thread Content
A certain steam pipeline is designed as a pressure pipeline, and the inspection ratio specified in the drawings is 10%. This pipeline has 20 butt welds for DN100 diameter, 5 socket welds for DN100 diameter, and 15 butt welds for a pipeline with a diameter of 38. Calculation Method A: 20*10% – only the 20 butt welds for DN100 are taken into account. Calculation Method B: (20+5)*10% – both the 20 butt welds and the 5 socket welds for DN100 are taken into account. Calculation Method C: (20+5+15)*10% – all welds are taken into account. Which method is correct? Welder coverage and fixed joint issues are not considered
According to the information provided in the question, the steam pipelines are designed as pressure pipelines, with an inspection rate of 10%. Therefore, the correct calculation method is C, which involves adding up the total number of welds and then multiplying by 10%. Therefore, calculation method C (20+5+15)*10% is the correct method. .