eliutbbHello Jop,
Very interesting subject, as you said many clients have different rules, for example here in Mexico Pemex were allways content with a 2″ span between the edge of the flange and the edge of the OD of the smaller pipe (plus insulation). But recently they want 3″ the result is that we have to make bigger racks now, my theory about why they decided to change that rule is poor flexibilty design in past projects (oh, yes I’v seen it, and that is curiously related to other post you made in the Canada forum: https://pipingdesigners.com/wp//phpBB/viewtopic.php?t=17 )
BTW I have allways liked this forum and found usefull information, I just recently decided to post something here and stop just lurking. I really like what I do and hope I can help others to enjoy it too, with what little I have learned over the years.
Cheers!
Eliut