I've heard from several installers that small diameter schedule 10 pipe (such as 1-1/4") will warp if there's more than two welded outlets made onto it.
Would any installer/contractors weigh in on how you best combat this problem?
I could see larger diameter (1-1/2" or more) schedule 10 as a possible solution, which also helps hydraulics. I could also see voluntarily going to schedule 40 as a possible solution. Cutting the pipe into shorter segments and adding couplings would also help, but I could see the cost adding up for the labor, couplings, and additional hangers.
Posted anonymously for discussion. Discuss This | Submit Your Question | Subscribe
Subscribe and learn something new each day:
Thank You to Our Top
October '20 Contributors!
Sprinkler Designer or Engineer?
Get all of our tools, including the Sprinkler Database, Friction Loss Calculator, Fire Pump Analyzer and more:
Daily discussions are open-ended fire protection, fire alarm, and life safety questions submitted anonymously for the benefit of sharing expertise and learning from other perspectives. Anyone can submit a question here:
2020 PE Prep Guide
PE Prep Series
2020 PE Prep Series
(Click to enlarge)
Visit July-October for daily Fire Protection PE Exam sample questions.
Solutions are posted the day after posting.
Comment with your solutions, questions or clarifications.
Please note that questions posted are unofficial and in accordance with NCEES rules are intended to be similar to actual exam questions, not actual exam questions themselves.