Question

- 3. A propane storage tank is constructed by welding two hemispherical end caps onto a cylindrical main body. The cylindrical body is manufactured from a helical welded pipe which has an outside diameter of 750 mm and a wall thickness of 6 mm. The tank is designed to hold gas at an internal gauge pressure of 6 MPa. a) Draw the Mohr’s circle and determine the normal and shear stresses on the weld in the cylindrical main body portion of the tank. b) Indicate the weld stresses on the circle. c) Draw an element rotated in the plane of the weld and show the magnitude and direction of the stresses acting on the weld. SC Weld/ Weld

Answer 1

given VR 750mm = 0.750 02 thcaress o l thickness t = 6mm = 0.006m pressure – 6 M Pa = 6x100/m2 prepon : 0 - plan o) y = pe Ongelo AWWIIIIAAAAAAAA1114411994114114 - 270.006 4t : entor tury + 640*075 - 375X106 W/m walay Writto 0 ,9 e 1875 Co-ordinate of circle = og tok z 180):25 Ro Montoya Cynt du 450)