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Hydrostatic/Hydrotest Pressure as per UG99(b)
You are correct. Thickness is determined by Design Pressure mostly but not always. For example, thickness of tall tower is determined by Wind condition sometimes. Likewise, for some cases MAWP is one of the governings for thickness. The difference between MAP(so called new and cold condition)...- donoharm
- Post #4
- Forum: Boiler and Pressure Vessel engineering
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Allowable stress for Hoop stress
I agree with you, JStephen. Your point is very reasonable and makes sense. But I am wondering which allowable stress is used in the commercial tank calculation programs. I think you are right because if the allowable stress of API650 will be used then there will be no impact on API620 caused by...- donoharm
- Post #3
- Forum: Storage tank engineering
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Allowable stress for Hoop stress
Hello. As per API620 Annex L, lots of requirements shall refer to API650 Annex E. Dynamic liquid hoop forces are one of them. Based on E.6.1.4-6, sigmaT shall be decided by adding sigma h and sigma s. Which means, total dynamic liquid hoop stress is governed by static liquid pressure and...- donoharm
- Thread
- Replies: 3
- Forum: Storage tank engineering
