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

Piping fatigue and corrosion

ASME B31.3 contains the footnote ‘Corrosion can sharply decrease cyclic life; therefore, corrosion resistant materials should be considered where a large number of major stress cycles is anticipated’. But what happens if carbon steel with high corrosion allowance has been selected and changes are out of the question? Or you may be assessing an existing … Read more

Pipe Support Selection for Bare Pipe

There are many ways to go about supporting pipe, from putting it straight on steel to sophisticated sliding shoe designs. Too often, this aspect of piping design is not given enough thought, resulting in problems later on in the life of a facility. Early on in detail design, the responsible party should prepare a flow-chart … Read more

‘Quick and Dirty’ FFS of Fittings

Assessing fitness for service of pipe fittings is tricky. Whilst we’d encourage you to assess them carefully, what about when you just want to know if you should expend the effort to do more detailed analysis or FEA ? Here is a simple approach that can sometimes be employed when you need a first pass … Read more