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Re: O-lets Requirments
Posted: 20 Sep 2010, 17:15
by novice123
which section of B31.3 state that requirement?
Re: O-lets Requirments
Posted: 20 Sep 2010, 17:18
by arcpro
See Sec. 304.3.3 and 304.3.4.
Re: O-lets Requirments
Posted: 21 Sep 2010, 04:46
by ben
Reinforcing pad is not required for intersections using couplings whose size does not exceed 2" NPS nor one-fourth the nominal diameter of the running pipe. Similarly in case of pressure vessels, every nozzle above 2" NPS (sometimes may be 3" NPS) shall be reinforced.
Re: O-lets Requirments
Posted: 22 Sep 2010, 20:25
by mechcolor
See Appendix H of ASME B31.3 for sample calculations of branch reinforcement.