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ONE TANK 85 METER DIA. IS UNDER CONSTRUCTION ACCORDING TO API650 CONSISTING OF 11 SHELL COURSES WHERE ITS DIAMETER HAS BEEN REDUCED BY 35MM AT 10TH SHELL COURSE AS WELL AS 85MM AT LAST 11TH SHELL COURSE. WHAT IS THE SOLUTION OF THIS SITUATION? CAN IT BE ACCEPTED UNDER THE RADIUS TOLERANCE AS...

thread1452-410755 If your material is group I,II,III or IIIA there is no restriction in API 650. But if your material is group IV, V and VI there is 150 mm clearance from the vertical. As mentioned above can i be informed of a reference of API 650 in which section or para this exemption of...

Is the Top angle and Curb Angle same or different?

Shell Thickness 9 mm & 6mm. Material SA516-Gr.60N. NOZZLES SIZE 2". PIPE + FLANGE.

Yes Mr.FIRs you are right its 5.7.3 in 12th edition of API650 but the subject we are discussing starts from 5.7.1. yes this is an existing tank under construction, the space or dimension measured is coming 50 to 60 mm as shown in figure 5.6 dimension B for an individual nozzle without repad...

According to API 650 5.7.1.1 Minimum Dimension Between Weld Toes or Weld Center-lines should be 75 MM. what is the corrective action if this space(75mm from weld center line to other i.e nozzle welds toe)is not maintainable.

API 650 code tank. Anchor chair pad (thickness 15mm) to be welded with anchor chair top plate/comp plate (thickness 35mm) fillet weld with Material P1-to-P1. Is there any requirement to preheat,if yes then what will be the preheat temperature?

Thanks for your reference and clarification.

Thanks So What is the purpose of para 7.3.6.8 if there is no tolerance limit of distortion, It is mentioning that the measurements shall be taken before and after of the hydro test.

What is tolerance of Bottom plate out of slope due to welding distortion or shrinkage before and after hydro test.