The equations used for determining the wall thickness of a cylindrical section of a thin walled pressure vessel differ in PD5500 (Specification of unfired, fusion welded pressure vessels) and the AMSE Boiler \& Pressure Vessel Design Codes. The equation stated in PD5500 is e=2fPPD Equation Q2.1 Whilst the AMSE BVP Code states: e=2JfPPD Equation Q2.2 Where P is the design pressure (Nmm2),D is the vessel diameter (mm),f denotes the design strength of the material of construction (Nmm2) and e the minimum wall thickness (mm). (a) With reference to non-destructive testing (NDT): (i) Explain the purpose of the parameter J in Equation Q2.2. [4 Marks] (ii) Why does the factor J not appear in the Equation Q2.1? [3 Marks] (ii) Under what circumstances would J take a value of 1.0 ? [3 Marks] (b) Using Equation Q2.2 with J=0.9 and the data supplied as Table Q2.1, specify the minimum wall thickness for a vessel operating at 400C and 10 bar (gauge) which has a diameter of 2m. The vessel will be constructed from stainless steel 316 and a corrosion allowance of 2 mm must be applied. (c) Sketch a typical stress-strain curve resulting from tensile testing of a metal sample and with reference to your sketch define the following: (i) Yield stress (ii) Ultimate tensile strength (iii) Breaking stress (iv) Young's Modulus. [7 Marks] (TOTAL 25 MARKS) Table Q2.1: Design Strength of Stainless Steel