A 45-degree spiral riser elbow has too little collar engagement and slips
An angled riser puts weight and vibration on the joint. If collar engagement is short, replace the fitting or use an approved deeper-sleeve/companion connection.
Do not let a short slip collar carry the dead weight of an angled spiral riser.
Check
Measure actual collar engagement at the 45 elbow.
Check whether the riser has independent support.
Look for pipe sliding, rattling, or crushed collars.
Use a deeper-collar fitting or approved coupling if engagement is short.
Support the riser load separately before sealing.
Steps
Measure actual collar engagement at the 45 elbow.
Check whether the riser has independent support.
Look for pipe sliding, rattling, or crushed collars.
Use a deeper-collar fitting or approved coupling if engagement is short.
Support the riser load separately before sealing.
Say this to your foreman
The angled spiral riser at [location] is slipping because the 45 elbow collar is too short. I checked support and engagement. Do you want a deep-collar fitting or approved companion/coupling detail?