Sir,
You mis-understand.

the piping code is b31.3
and is well in force

perhaps i should have said standards or guidlines.

i am just after any 'tricks of the trade'regarding crude oil if applicable
similar to the diers studies carried out for relief systems

if my original question is inappropriate i will remove it from this forumn.

I was hoping for a positive response,
especially from the Texas community.

regards