The Story of Buried Steel Pipes & Tanks - Watkins

I'm trying to figure out depth of 2000 psi API X52-5L pipe needs to be if the pipe is running under our roadway - it's located in rock. But, in googling, I ran across the above noted article - rather interesting especially the tale of how the 0.01 inch D-Load crack width came into being. Enjoy it:

https://www.steeltank.com/LinkClick.aspx?fileticket=pK9crCD8Z0s=&tabid=94&mid=452

 

[iandig]

Fantastic reference BigH. It really sets the scene for what we do, and more importantly why we do what we do in the way we do it. All young Engineers should read this and other similar stories so they better understand the kind of industry we work in.
All I need now is the origin of why “less than 25mm total settlement” is the industry standard in the UK. I have heard all sorts of reasons, from the sublime to the ridiculous along with the number of people who still believe that there should not be any settlement at all.
I have had a case recently where the Clients representative stated that the observed settlement was “more than they expected” even though it was only 60% of predicted based on a comprehensive ground model, and surveyed by two independent companies over a five year period to high accuracy. Not the normal thing to do on a ground bearing floor slab for a shed, but there was sulphate attack occurring within the cement/lime/GGBS sub-base replacement layer and they have been checking the floor tolerance on a two week basis for the last 4 years