O-lets Requirments

Mechanical / Civil engineering, Design of Pressure Vessels, Heat-exchangers, Piping, Steel / Civil Structure etc.
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novice123
Posts: 95
Joined: 24 Jul 2010, 18:32
Area of interest: Petroleum Engineering

Re: O-lets Requirments

Post by novice123 »

which section of B31.3 state that requirement?
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arcpro
Posts: 356
Joined: 16 Apr 2010, 18:46
Area of interest: Manufacturing Engineering

Re: O-lets Requirments

Post by arcpro »

See Sec. 304.3.3 and 304.3.4.
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ben
Posts: 214
Joined: 24 Aug 2010, 03:11
Area of interest: Mechanical Engineering

Re: O-lets Requirments

Post 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.
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mechcolor
Posts: 258
Joined: 17 May 2010, 18:05
Area of interest: Manufacturing Engineering

Re: O-lets Requirments

Post by mechcolor »

See Appendix H of ASME B31.3 for sample calculations of branch reinforcement.
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