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Nameplate MAWP Less than Design Pressure
Our customer needs an SA-516-70 pressure vessel that will operate at slightly below 1 atm. The original plan was to rate the vessel for 1 atm, and avoid needing to Code-stamp. But now we find that the vessel must be pressurized with steam at 2 atm for 48 hours in order to cure the rubber lining...- AarVee
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- Replies: 13
- Forum: Boiler and Pressure Vessel engineering
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Impact Test SA-182-F51 Flanges
My supplier is designing a vessel with duplex flanges for -45degC under ASME VIII-1. Per UHA-51, these SA-182-F51 flanges must be impact tested. What sort of documentation should I expect from the supplier to prove that these forged flanges are properly tested? Are sample flanges selected from...- AarVee
- Thread
- Replies: 8
- Forum: Boiler and Pressure Vessel engineering
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SB 725? Pipe
I am looking into the use of N04400 pipe for a Sect VIII Div 1 Vessel. My internet searches have turned up references to SB 725 pipe, but this material is not listed in Section II. Have I missed an Interpretation that permits the use of B 725 pipe in Code vessels? Or is it just remotely possible...- AarVee
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- Replies: 3
- Forum: Boiler and Pressure Vessel engineering
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UCS-66 for B16.5
According to UCS-66(c), impact testing is not required for ASME B16.5 ferritic steel flanges down to -20F. (I understand "ferritic steel" to include only carbon steel like SA-105, SA-350. Correct me if I'm wrong.) To get a colder MDMT, one can employ UCS-66(b)(1)(b). My question is: Are there...- AarVee
- Thread
- Replies: 3
- Forum: Boiler and Pressure Vessel engineering
