WATER RESOURCES ENGINEERING
3rd Edition
ISBN: 9781119490579
Author: Mays
Publisher: WILEY
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Chapter 4, Problem 4.4.1P
To determine
Number of bolts required for the safe connection.
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The gas storage tank is fabricated in the following manner: a 10-mm thick plate is rolled to form a cylindrical shell which is bolted on one side, then its ends are sealed by bolting two hemispherical shells. The resulting inner diameter of the tank is 4 m. All bolts have a diameter of 15 mm. If the internal pressure in the tank is 1 MPa, determine the following:a. the number of bolts needed in each hemispherical shell if the normal stress in the bolts should not exceed 250 MPab. the minimum required thickness of the hemispherical shells if the normal stress in the shell should not exceed 125 MPac. the hoop stress in the cylinderd. the minimum require spacing of the bolts in the cylindrical shell if the normal stress in the bolts should not exceed 250 MPa.
A storage tank if fabricated by bolting together two half cylindrical shells as shown. The tank is designed to withstand a pressure of 3MPa. The tank and the 25mm bolts are made from a material having an allowable normal stress of 158MPa and 246MPa respectively. The tank's inner diameter is 4m.
What are the required thickness of the hemispherical and cylindrical shells and the required number of bolts in each hemispherical cap?
A pipe carrying steam at 3.5 MPa has an outside diameter of 450 mm and a wall thickness of 10 mm. A gasket is inserted between the flange at one end of the pipe and a flat plate used to cap the end. How many 40-mm-diameter bolts must be used to hold the cap on if the allowable stress in the bolts is 105 MPa, of which 55 MPa is the initial stress? What circumferential stress is developed in the pipe? Why is it necessary to tighten the bolt initially, and what will happen if the steam pressure should cause the stress in the bolts to be twice the value of the initial stress? *
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A cylindrical steel pressure vessel 400 mm in diameter with a wall thickness of 20 mm, is subjected to an internal pressure of 5 MN/m^2. (a) Determine the safe stress between the tangential and longitudinal sections in the steel. (b) To what value may the internal pressure be increased if the stress in the steel is limited to 120 MPa? (c) If the internal pressure were increased until the vessel burst,…
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