Neglecting proper pipe support spacing on a long run once caused a sag that leaked at every coupling.

I now religiously follow the code tables for support intervals to prevent similar headaches.

3 comments

3 Comments

rubys801mo agoMost Upvoted

During a retrofit at a chemical plant last year, we found that thermal cycling from process heat demanded support spacing 30% tighter than ASTM standards. The pipes would expand and contract so much that even code-compliant spacing allowed for movement-induced stress at couplings. Now I always factor in the operating environment, not just the static load tables, to prevent those incremental leaks. It's a lesson in dynamic vs. static design that's saved me from callbacks.

the_susan1mo ago

Thirty percent deviation... unbelievable in modern engineering standards.

jordan_webb1mo ago

Seriously? A full 30% under the book seems like a lot. Aren't those standards supposed to have a big safety cushion already? I get that real world stuff happens, but it sounds like maybe the original install was pushing the limits. The codes usually cover 99% of cases and let engineers make calls for the weird 1%. Maybe this was just that one weird case, not a sign the whole standard is wrong.