Please,refer to API 650 Eleventh Edition, Addendum 2008, Numeral 7.5.2 Plumbness, 7.5.3 Roundness and 7.5.4 Local Deviations. All are very importand mesurement. Regards, jml 2010/5/31 jose seban < joseseban@gmail.com > Dear Friends, I am making fixed roof cylindrical oil storage tanks as per Indian Standards IS-803.In section 9.3.5 it is mentioned about circularity and shape.There it is mentioned about verticality & circularity tolerences.Also it is mentioned about peaking and bending of welds there.. 1.Peaking of vertical weld joints measured over an arc length of 1 m shall not exceed 12 mmm. 2.Bending of horizontal weld joints measured by a straightedge of 1 m length shall not exceed 12 mm. My questions are.. 1.What is meant by this peaking and bending there? 2.How we will measure these factors? 3.How would the unit "millimetre" will come for these factors measurement? 4.Is these 2 measurements are important in tank fabrication,if I am checking vericality ...
Materials selection, welding, forming, Heat treatment, corrossion, NDT