Easy vacuum checks for piping

buckled pipe

A client recently asked us whether vacuum may be a problem for her piping system. She was aware that the piping codes pointed to the external pressure check in ASME VIII Division 1. I won’t make this out to be a simple topic and indeed there is still ongoing research in the area. But for … Read more

FFS Interpolator

FEA model of corroded pipe with pressure bulge

Improve on API 579 Level 1 or 2 It’s been a while between posts, so let me say that I haven’t been completely idle – I’ve been cooking up a new web-based calculation app for engineers dealing with corrosion defects. On the surface, this application looks similar to the API 579 Level 1 assessment for … Read more

Calculating pressure containment of welding tees

photo of B16.9 tee

There are at least three recognised methods for assessment of branch intersections. These are most often applied to fabricated connections on pressure vessels and piping rather than welding tees. Welding tees to ASME B16.9 are normally qualified by vendor burst tests, but that doesn’t help if you need to assess a corroded or eroded fitting, … Read more