Piping Codes and Standards used in Process Plants

Sandesh Naik Piping engineer

.

Engineering Academy Engineer

Thanks everyeng

Bassem Belkhiri Student

Initially, I wasn’t sure what to expect from this course. HDPE piping was always treated as “low risk” on a few oil & gas water injection and energy utilities projects I’ve worked on, so formal stress analysis rarely came up. This course filled that gap pretty directly. The sections on viscoelastic behavior and creep really stood out, especially when tied to thermal expansion and long-term loading. Those topics aren’t handled the same way as carbon steel, and that difference is where past designs went wrong. One challenge was getting comfortable with the time‑dependent material properties in the software models—it took a bit of trial and error to understand how temperature cycles actually affect stress over years, not just startup cases. What helped was the focus on practical items like support spacing, anchoring philosophy, and how internal pressure interacts with flexibility. That translated well to an ongoing utilities project involving above-ground HDPE lines near pump stations, where expansion and restraint are real issues. The biggest takeaway was having a structured way to justify design decisions instead of relying on rules of thumb. I can see this being useful in long-term project work.

Samuel Shivaraj Senior Chief Engineer

Initially, I wasn’t sure what to expect from this course, given how HDPE lines are still treated as “secondary” in many oil & gas and energy utilities projects. The material went deeper than typical vendor guidance, especially around viscoelastic behavior, creep rupture, and how thermal expansion actually redistributes loads at the system level. That part aligned well with issues seen in gas gathering lines and utility water mains, where long straight runs behave very differently over time compared to steel. One challenge was adjusting to the time‑dependent modulus assumptions in the stress models. Translating short-term test data into long-term operating cases isn’t something most industry practices document clearly, so it took effort to reconcile the theory with conservative design expectations. Edge cases like partially restrained buried HDPE and mixed anchor/support conditions were handled realistically, not glossed over. A practical takeaway was a more defensible approach to support spacing and anchoring, especially for temperature cycling cases that utilities often underestimate. The discussion on pressure plus thermal interaction was useful when compared to how metallic piping rules are often misapplied to polymers. The content felt aligned with practical engineering demands.