A circular penstock of mild steel, 1.2 m in diameter, is fabricated in a workshop with 12 mm thick plates. The plates are secured by 8 mm size fillet welds, provided on the inside and outside of the lapped ends as shown in figure below. Determine the safe internal pressure that can be allowed in the penstock (in N/mm2, up to two decimal places)
(Take fu = 410 MPa, γmw = 1.25, Factor of safety = 1.5)
Enter numerical value using the virtual keypad. Round off where necessary.