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Q. Define Maximum Allowable Working Pressure?
The MAWP to be marked on the Section VIII nameplate is defined as the maximum gauge pressure permissible at the top of a completed vessel in its normal operating position at the designated coincident metal temperature for that pressure. This MAWP may be determined from the design pressure or from calculations, based on the specified nominal component thicknesses, reduced by the specified corrosion allowances.
The maximum permissible set-to-operate pressure of a single safety relief device cannot be higher than the MAWP.
A suitable margin consistent with the uncertainties with which the true maximum mean-metal temperature can be determined should be included. The design temperature for vessels shall be the maximum temperature for which a reduction in maximum allowable stress is not required (6500F (3430C) for carbon steel). If there is a limiting appurtenance, vessel design metal temperature shall be the maximum temperature allowed for that appurtenance at design pressure.
Nominal Strain and True Strain: Nominal Strain is ratio of change in length per initial length. Nominal strain = Change in length / Initial length = Δ L / L
The spring controlled governor of the Hartung type has two rotating masses each of 2.5kg and the limits of their radius of rotation are 100 mm and 125 mm. The each mass is directl
Q. External Pressure Design of unfired pressure vessels? Determine requirements for external pressure based on the expected operation of the vessel, and add a suitable operatin
Determine minimum value of weigh to cause motion: Determine minimum value of weight W required to cause motion of block, which rests on a horizontal plane. The block weighs 3
Compute depth of yielding in the hollow shaft: A solid shaft 80 mm diameter is solid for a certain length from one end but hollow for the remaining length along inner diameter
function of helium shielding gas
TYPES OF WELDING
design
Reciprocatin Compressor. It is taken in use to compressor gases. ( kE 2 - kE 1) = 0, ( pE 2 - pE 1) = 0 q 1-2 - w 1-2 = ( h 2 - h 1 ) + 0 + 0 - q 1-2 - (- w
Resultant of Non-coplanar Force System: The resultant of a system of coplanar forces can be attained by adding up two forces through law of parallelogram at a time and after t
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