Stresses in Pressure Vessel
Circumferential (hoop) stress.
Longitudinal stress
Radial stress
Bending stress
Shear stress
1. Circumferential (hoop) stress:
The stress which acts tangent to the circumference and perpendicular to the axis of the cylinder is called circumferential or hoop stress.
2. Longitudinal stress:
The stress which acts normal to circumference and parallel to the axis of the cylinder is called longitudinal stress
3. Bending stress:
4. Shear stress:
            The stress which acts in a direction perpendicular to the internal surface is called radial stress
5. Radial stress:
The stress which acts in a direction perpendicular to the internal surface is called radial stress
MOMENT OF INERTIA OF AN AREA
The moment of inertia of an area with respect to an axis is the sum of the products obtained by multiplying each element of the area by the square of its distance from the axis. The moment of inertia (I) for thin walled cylinder about its transverse axis
                                                I = π x r3 x t
Where
r = mean radius of cylinder
t = wall thickness
VARIOUS CODES USING FOR DESIGNING A PRESSURE VESSEL:
There are many codes/standards for designing the pressure vessels they are,
ASME Sec. VIII
AS 1210
British standard PD: 5500
EN-13445
IBR
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