No. of Pages: 2

API ABDUL KALAM TECHNOLOGICAL UNIVERSITY
SECOND SEMESTER M.TECH DEGREE EXAMINATION, APRIL-MAY 2018
Mechanical Engineering
(Machine Design)
01ME6104 Design of Pressure Vessels and Piping

Max. Marks: 60 Duration: 3 Hours

Answer any two full questions from Part A, B &C
Limit answers to the required points.

Use of Design Data Hand Book and ASME/IS Codes permit*e.7

Part A
1 a) What is the dilation of a pressure vessel? Find an expression for the dilation of a cylindrical
Pressure vessel? (3) b) Write a short note on ASME section Vill? (3) c) Sketch the common
heads used in a pressure vessel? (3)
2) a) Derive a relation for the membrane stresses in vessels under internal pressure? Hence arrive
at a relation for the hoop and longitudinal stress in an 180° bend? (6) b) Discuss about various type of
loads acting on a pressure vessel? (3)

3) A compound cylinder is made by shrink fitting a tube of 200mm internal diameter and 30mm
thickness to an external tube of 300mm external diameter. Before shrink fitting there was a radial
clearance of 0.04mm between the tubes. Find the radial pressure and also plot the final stresses if the
tube was subjected to an internal pressure of 20N/mm 7 and an external pressure of SN/mm 2 . E =

200GPa and Poisson ratio = 0.3. (9)

Part B
4) Do the reinforcement of the following pressure vessel nozzle system:

A protruding type nozzle, with outside diameter 12cm and thickness 1.5cm is welded to the shell of
inside diameter 150007 and thickness 2.5cm. The protruding length of the nozzle inside the vessel is
2cm, Allowable stress for shell is SOOMPa and that of nozzle is 4501/08. Design pressure is 35Kg/cm 2.
Fillet weld size is 1.25cm of equal leg size. (9)