Recent content by JAS

Dear All, The present condition of the ALREADY FABRICATED COLUMN has FULL VACUUM with 6mm CA. The information did not pass on to the Vendor and the Column has been fabricated considering PARTIAL VACUUM. So only the top Shell course & Head fails because of less thickness (Fabricated 18mm with...

Thank you LittleInch...

Hello everyone, We have already discussed many times in this forum regarding the Travelling Speed of a Floating Roof. All are generic answers and based on experience. Iam designing few Tanks and was asked the Travelling speed of the Floating Roof to judge the wear & tear (including for the...

hi, Check this website: https://www.chinesesteelgrades.com/q275-steel/ Thanks, JAS

Hello, Out-of-roundness is the difference between the maximum and minimum diameters at any cross section. Yes, you are right-->out-of-roundness shall be measured on full length of a shell section/course. A dent is a permanent plastic deformation of the circular cross-section of the Shell. A...

Hello, API 650 does not mention the criteria for the selection of Roof types. Generally, Roof types depends on the Size (dia) of the Tank, Liquid stored, Hazardous etc,. for example, If the vapour pressure is more and if there is a possibility of forming a Vapour cloud above the liquid surface...

Hi, refer "Formula for Stress and Strain" by "Roarks and Young" for the design of Rectangular Tanks.

Hi, Section-8 is for Method of Examining Joints and explains about RT, UT, MP, LP, Visual, Vacuum. Method of RT is same for all Tanks. There are other tests in case if RT is not possible. The quality of the Radiography film speaks about the Welder's performance. You may refer to 8.1.2.5 /...

hi, the only interpretation used by API 650 is by calculating H1 (5.9.7.1) & Wtr (5.9.7.2) and check whether Wtr is > H1. The ratio of Wtr/H1 provides the required quantity of Intermediate girders. Cheers.

Great ! Thank you so much @JStephen.

Dear All, May I know, is there any criteria in API 650, that the thickness of the Bottom plate shall be equal to the thickness of the First Shell course. Also, should the thickness of the Annular plate (if used) shall be equal to the thickness of the Bottom plate. Thank you in advance...

Thank you guys, it is clear that the Thickness are including CA.

Guys, API 650 5.6.1.1 defines the Nominal plate thickness based on the Nominal Tank diameter. May I know whether, the plate thickness mentioned includes the Corrosion Allowance or without Corrosion Allowance? Example, if the selected plate thickness is 6mm (as per 5.6.1.1), should I add...

Hello guys, Iam reviewing an offer just received from a Tank manufacturer for constructing larger Tanks. Manufacturer has mentioned "to build the tank in accordance with the “sheet-to-sheet water assembly” method. He has mentioned that this method affords the advantage of filling gradually the...

@moltenmetal, This vessel has been designed only as "preliminary". We will place the order to any of the EPC contractors for a detailed design, who inturn will approach any vendors for fabrication. We have approached the logistics person with the preliminary design with all the necessary details...