A cylindrical pressure vessel is subjected to an internal pressure of 3 Mpa on internal diameter of 1000 mm. The vessel is fabricated with single weld butt joint with back strip and is not radio-graphed. What is the thickness of flat head, if head made of alloy steel has an ultimate tensile strength of 400 N/mm ? (corrosion allowance = 2)

A cylindrical pressure vessel is subjected to an internal pressure of

1.	A cylindrical pressure vessel is subjected to an internal pressure of 3 Mpa on internal diameter of 1000 mm. The vessel is fabricated with single weld butt joint with back strip and is not radio-graphed. What is the thickness of flat head, if head made of alloy steel has an ultimate tensile strength of 400 N/mm ? (corrosion allowance = 2)
A.	110 mm
B.	120 mm
C.	150.23 mm
D.	152.13 mm
Answer» B. 120 mm

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