Third Party Inspection for Ground Storage Tank-

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            Reference Documents- 1.     Design code 2.     Purchase order specification 3.     Purchaser's standards 4.     Approved drawings 5.     API 650 6.     API 620 7.     API 653 8.     BS 2654 Inspection Activities from start to finish-              Material Inspection            Fabrication Inspection            Plate Preparation            Shell Courses and Base Plates containing Welded Seams            Post Weld Heat Treatment of Hot Formed Components            Assembly Inspection             Painting and Coating              ...
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Important Point For Pressure Vessel Inspector-E-5

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 INTERNAL PRESSURE

The inspector should be able to determine:

a) The required thickness of a cylindrical shell based on circumferential stress given a pressure (UG-27(c)(1));

b) The required thickness of a spherical shell based on circumferential stress given a pressure ( UG-27(d)

c) The vessel part MAWP for a cylindrical shell based on circumferential stress given a metal thickness (UG-27(c)(1));

d) The required thickness of a head (ellipsoidal, and hemispherical) given a pressure. (UG-32 (d), and (f))

e) The vessel part MAWP for a head (ellipsoidal, and hemispherical) given a metal thickness. (UG-32 (d), and (f)).

f) Whether a head (ellipsoidal or hemispherical) meets Code requirements given both pressure and metal thickness. (UG 32(c) and (e)).

The inspector should also be able to compensate for the corrosion allowance: add or subtract based on requirements of the examination problem. The Section VIII, Appendix 1 formula for cylinders, which is based on outside diameter, can be used. The Appendix 1 formulas for non-standard heads will not be required.

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