2020年5月31日 · In basic API 650 standard joint efficiency is equal to one. There are radiographic requirements for shell butt welds, the frequency determined by material thickness. However for floor and roof joints no radiography is required unless requested by purchaser.

2024年2月1日 · A broad storage tank is evaluated using API 650 standard and FEA methodology for a joint efficiency of 0.7 to identify discrepancies in the maximum fill height (MFH). Failure modes of plastic collapse and buckling were analyzed using API 579 methodology and ASME VIII division 2 part 5.

2003年8月23日 · The basic design requirements of API-650 are to use a joint efficiency of 1.0 and the RT requirements of Section 6. The extent of RT is based upon the plate thickness. At the low end of the scale (thickness of 3/8 and less) only a limited number of RT shots are required.

2008年8月9日 · API-650 assumes a 100% joint efficiency for the standard design. This does not require full radiography except in heavier plate, and should not be confused with the requirements of ASME. (Note that allowable stresses are a lot different from ASME as well.) Under App. A, you can use reduced or omitted radiography with lower joint efficiencies.

2004年8月12日 · API-650 uses a basic joint efficiency of 100% for design. The extent of radiographic joint inspection is based on plate thickness. It is more than "Spot RT", but not "Full RT". They use a sliding scale of RT based on thickness.

Appendix A allows joint efficiencies of either 0.85 or 0.7 If 0.7 is used 42% additional plate thickness is required. Joint efficiency of 0.7 provides a relaxation on NDT. Documented in Clause A3.4 of API650. By agreement of contractor and purchaser. 5/27/2009 FUEL TANK & PIPE 35

2023年12月1日 · API 650's Annex E, which is an American Standard for designing aboveground steel storage tanks subjected to seismic loads, is reviewed by comparing the design provisions in Annex E with other...

2004年8月17日 · API-650 uses a basic joint efficiency of 100% for design. The extent of radiographic joint inspection is based on plate thickness. It is more than "Spot RT", but not "Full RT". They use a sliding scale of RT based on thickness.

Semantic Scholar extracted view of "Analyzing joint efficiency in storage tanks: A comparative study of API 650 standard and API 579 using finite element analysis for enhanced reliability" by Deivi García-G et al.

2024年1月13日 · With a joint efficiency of less than 100% (or 1.0) there will more steel away from the joint than you need to resist the tension from product loading. With this background you can see that the joint efficiency is the evaluation of a shell vertical joint which can be in several configutations including welded.