API 650 floating-roof tanks dimensional tolerances

Requirements for prefabrication of bottom plate of large vertical API 650 floating-roof tanks:
1. The diameter of tank bottom should be enlarged by 0.1% ~ 0.15% according to the design diameter.
2. The minimum dimension of edge plate along the radius direction of tank bottom shall not be less than 700mm.
3. The distance between any adjacent welds of the base plate shall not be less than 300 mm.storage tank Annular Bottom Plates
Thickness shall be per API 650, Appendix E (with loads modified by requirements of this appendix) plus corrosion allowance unless a thickness increase is required for compliance with Appendix R or Appendix Q. Annular plate width shall be per API 650, Appendix E (with loads modified by requirements of this appendix) unless a width increase is required for compliance with Appendix R or Appendix Q. Thickness used for determination of API 650 welded storage tank standard, Appendix E width shall be based on the thickness required for seismic product hold down.API 650 petroleum storage tank stipulates that if the thickness of the lower siding obtained by calculating the anti-overturning moment is greater than the thickness of the API 650 floating-roof tanks hydrostatic pressure test (both do not include the corrosion margin), the calculated thickness of the above siding required by the hydrostatic pressure is It should also be increased by the same proportion, unless special analysis is performed to determine the seismic overturning moment and corresponding stress at the bottom of each layer of API 650 petroleum storage tank wall.The company has always adhered to the corporate purpose of “improving benefits, creating wealth, benefiting employees, and giving back to the society”. We adhere to the corporate spirit of ""innovation, efficiency, integrity, and win-win"", attract first-class talents, strive for first-class indicators, create first-class benefits, build first-class enterprises, pursue excellence, innovative development, and efficiently serve the coordinated development of the Beijing-Tianjin-Hebei and the ""Belt and Road"" Economic development strategy.BEBON is willing to cooperate with friends from all sides for a win-win development!The boiler steel plates are among our main products. Other than standard size boiler steel plates, we also provide API 650 floating-roof tanks cutting, bending and so on processing to change plate size and shape according to your requirements. Welcome to consult us about API 650 floating-roof tanks ASTM A204 grade B properties, SA 516 gr 70 temperature range, ASTM A285 grade C chemical composition, boiler steel price and so on questions and ask for offer.