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ELAN Detector

Minimum Head/Shell Thickness Estimates

Thickness (in.) Diameter Allowable S Crown R E (joint eff.) Pin (psi) Pin (psi) Pex (psi)

45X45, 9% Steel, cold m psi m NA 15 105 15

Ellipsoidal (head, cylinder) 45.00 32,300.00 1.00 0.41 2.88 0.69Torispherical (head, cylinder) 45.00 32,300.00 45.00 1.00 0.73 5.10 1.22Hemispherical Head, Sphere 52.00 32,300.00 1.00 0.24 1.66 0.24

45X45, 9% Steel, warm m psi m NA 15 105 15Ellipsoidal (head, cylinder) 45.00 25,000.00 1.00 0.53 3.72 0.89Torispherical (head, cylinder) 45.00 25,000.00 45.00 1.00 0.94 6.59 1.57Hemispherical Head, Sphere 52.00 25,000.00 1.00 0.31 2.15 0.31

45X45, 9% Steel, warm m psi m NA 15 105 15

Ellipsoidal (head, cylinder) 45.00 25,000.00 1.00 0.53 3.72 N/A

Torispherical (head, cylinder) 45.00 25,000.00 45.00 1.00 0.94 6.59 N/AHemispherical Head, Sphere 52.00 25,000.00 1.00 0.31 2.15 0.31

45X45, 9% Steel, warm m psi m NA 15 105 15

Shell, Hoop (see Note 9, 13 ) 45.00 25,000.00 1.00 0.53 3.72 0.53

45X45, Al 5083, cold m psi m NA 15 105 15

Ellipsoidal (head, cylinder) 45.00 13,400.00 1.00 0.99 6.95 1.66Torispherical (head, cylinder) 45.00 13,400.00 45.00 1.00 1.76 12.30 2.93

Hemispherical Head, Sphere 52.00 13,400.00 1.00 0.57 4.01 0.57

45X45, Al 5083, warm m psi m NA 15 105 15

Ellipsoidal (head, cylinder) 45.00 10,000.00 1.00 1.33 9.31 2.22Torispherical (head, cylinder) 45.00 10,000.00 45.00 1.00 2.35 16.48 3.93Hemispherical Head, Sphere 52.00 10,000.00 1.00 0.77 5.38 0.77

45X45, Al 5083, warm m psi m NA 15 105 15

Ellipsoidal (head, cylinder) 45.00 10,000.00 1.00 1.33 9.31 N/ATorispherical (head, cylinder) 45.00 10,000.00 45.00 1.00 2.35 16.48 N/AHemispherical, Sphere 52.00 10,000.00 1.00 0.77 5.38 0.77

45X45, Al 5083, warm m psi m NA 15 105 15

Shell, Hoop (see Note 9, 13 ) 45.00 10,000.00 1.00 1.33 9.33 1.33

(see note 12 for items below)Shipboard, Al 5083, cold m psi m NA 15 66 15


Shipboard, Al 5083, warm m psi m NA 15 66 15


Notes:

1). Pin (psi) is valid for any specified joint efficiency (0.7 to 1.0). 1.0 requires 100% radiograph.

1a). E=1.00 implies 100% radiographed and is recommended for these diameters.

1b). Ellisoidal and Torispherical Pex is valid only for E=1.00 as formulated , see 2). Immediately below.

2). Alternate, iterative, calculations are required for Pex for E not equal to 1.0, except Hemispherical.

3). Note that if the head is mounted "inverted" the Pin value applies to the Pex service.

3a). This is useful for 15 psi vacum pumping and low pressure, I.e., 0-7.5 psi operation.

4). The Torispherical crown radius has been chosen equal to 1.0*D. (= ASME head)5). E=0.70 is the joint efficiency for non-radiographed joints, probably not applicable here.6). The 9% Ni Steel and AL 5083 Allowable Stress values are the ASME values for t< 1.5" in the case 0f Al..

7). Hemispherical heads (spheres) have diameters that yield volumes equal to Rt. Circ. Cylinders of D=45 and h=45 m.

8). The large Pin value is the maximum liquid head plus 1 atmosphere (for vacuum insul.), the worst case.

9). Careful: no considerations of Pex cylinder collaspe stiffener rings is made here. See UG-28, 29, 30.

10). The ASME standard Torispherical head knuckle radius = 0.06*L is assumed here.11). The shipboard values (below heavy line) approximate current practice: tank volume = (135,000 m^3)/4

12). W/re the Allowable for Al 5083 thick plate - not considered above - , see the table below:THICKNESS, IN. 100 F -320 F

Between ksi ksi0.051 1.500 10.00 13.40

1.501 3.000 9.70 12.603.001 5.000 9.50 11.905.001 7.000 9.20 11.10

7.001 8.000 9.00 10.30

13). Low internal pressure. large diameter, external pressure service require stiffening rings.

8/23/2013 Page 1/1 ACT

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