Upendra Tiwari

 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 ...

 STATIC HEAD The inspector must be able to compensate for the pressure resulting from static head. All static head will be based upon a Specific Gravity of 1.0. The inspector should be able to: a) List the static head/pressure conversion factor (0.433 psi/ft); b) Know the difference between vessel MAWP and vessel part MAWP (UG-98); c) Calculate static head pressure on any vessel part; d) Calculate total pressure (MAWP + static head) on any vessel part; e) Calculate maximum vessel MAWP given vessel parts MAWP and elevations Static head calculations may also be required during the internal pressure calculations if static head data is given in the examination problem