Calculating Blank Head Thickness
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According to ASME BPVC Section 1, PG-29.1, what formula is used to calculate the minimum required thickness of a seamless, unstayed dished head?

  • PG-29.6 UG-32(d)
  • PG-29.11 to PG-29.13 UG-32(e)
  • PG-29.7 to PG-29.8 UG-32(c)
  • PG-29.1 (correct)

    • In ASME BPVC Section I, what is the standard term used to describe a dished head?

  • Ellipsoidal
  • Torispherical (correct)
  • Segment of a sphere
  • Full hemispherical

    • In the design of a semi-ellipsoidal dished head, what is the relationship between the radius L and the diameter D?

  • L = 1.5D
  • L = D
  • L = 2D
  • L = 0.5D (correct)

    • According to the given information, what is the thickness of a blank head with a manhole that exceeds the allowed limit?

    <p>16.52 mm</p> Signup and view all the answers

    What is the thickness of a seamless, blank, unstayed dished head with pressure on the concave side, given a diameter of 1067 mm and a dish radius of 915 mm?

    <p>22.17 mm</p> Signup and view all the answers

    What is the required thickness of a seamless, blank, unstayed dished head with pressure on the concave side, given a diameter of 1067 mm, a dish radius of 827 mm, and a flanged-in manhole greater than 150 mm in one dimension?

    <p>25.17 mm</p> Signup and view all the answers

    According to the text, what is the formula for calculating the thickness of a blank, unstayed dished head with the pressure on the concave side, when it is a segment of a sphere?

    <p>$t = 5PL/4.8Sw$</p> Signup and view all the answers

    According to the text, when a dished head has a flanged-in manhole or access opening that exceeds 150 mm (6 in) in any dimension, how much should the thickness be increased by?

    <p>No less than 15% of the required thickness for a blank head</p> Signup and view all the answers

    According to the text, what is the minimum thickness of a head with a flanged-in manhole opening when the radius L to which the head is dished is less than 80% of the outside diameter of the head?

    <p>The thickness of a head with a flanged-in manhole opening shall be at least that found by making L equal to 80% of the outside diameter of the head and with the added thickness for the manhole</p> Signup and view all the answers

    According to the given information, what is the minimum required thickness for the dished head?

    <p>17.86 mm</p> Signup and view all the answers

    What is the ratio between the major and minor axis of an ellipsoidal head?

    <p>2:1</p> Signup and view all the answers

    What is the formula used to calculate the minimum required thickness for a blank, unstayed, full-hemispherical head?

    <p>$t = rac{PL}{2Sw - 0.2P}$</p> Signup and view all the answers

    If a flanged-in manhole is used in a full-hemispherical head, how is the thickness of the head calculated?

    <p>Using the same formula as for a head dished to a segment of a sphere</p> Signup and view all the answers

    What is the value of 'y' used in the formula to calculate the thickness of a cylindrical vessel?

    <p>0.4</p> Signup and view all the answers

    What is the value of 'E' used in the formula to calculate the thickness of a cylindrical vessel?

    <p>1.0</p> Signup and view all the answers

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