Evaluation of design criteria for storage tanks with frangible roof joints
API 650 (API, 1993) provides design criteria for fluid storage tanks with frangible roof joints. The rules are intended for fluid storage tanks used to store flammable liquids which could be subjected to sudden over-pressurization. Sudden over-pressurization can lead to the catastrophic loss of tank integrity. One undesirable mode of failure is the loss of the shell-to-bottom joint, which results in loss of containment and spillage of the contents. This report describes research that evaluated the ability of the present design criteria to ensure the desired frangible joint behavior. Particular questions include: Evaluation of the area inequality as a method to predict the buckling response of the compression ring; effect of roof slope, tank diameter, and weld size on the frangible joint; effect of the relative strength of the roof-to-shell joint compared to the shell-to-bottom joint. All objectives of the research have been completed. This report is a description of the entire research project. Additional information is provided on a video of the testing that has been submitted to the PVRC and API.
- OSTI ID:
- 379775
- Journal Information:
- Bulletin - Welding Research Council, Journal Name: Bulletin - Welding Research Council Journal Issue: 410; ISSN 0043-2326; ISSN WRCBA2
- Country of Publication:
- United States
- Language:
- English
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