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Q. Explain about Postweld Heat Treatment?
Pressure vessels shall be postweld heat treated per applicable sections, in accordance with applicable material specifications or when specified by the User, due to service such as ammonia, caustics, amines, or wet hydrogen sulfide. Alternative Postweld Heat Treatment Requirements For Carbon And Low Alloy Steels, shall not be employed.
PWHT provides reduction of residual stresses, due to forming and welding, and results in softening of heat affected zones. Some steels can be damaged within certain temperature zones below PWHT temperature. A Materials Engineer shall be consulted regarding the need for postweld heat treatment, and dependent on service conditions. The resulting recommendation shall be included on the Data Sheet.
Derive heat transfer and work transfer expression in an non-flow or closed isothermal and polytropic procedure?
basic idea in designing of aircraft ejection seat
Q . Determine MI of unequal angle section 15cm × 10cm × 1.5cm with longer leg vertical and is flange upwards. Figure Sol. : A 1 = 10 ×
Explain the Moment of resistance? Sol.: The two equal and unlike parallel forces, the lines of action of which are not same, form couple. The resultant compressive force ( P
A rigid bar ABCD is hinged at A and supported by a bronze rod, 2m long, and a steel rod 1m long as shown in figure A load of 80 KN is applied at end B. Determine the stresses in ea
Q. Can you explain Investment casting? -Investment casting produces very high surface quality and dimensional accuracy. -Investment casting is commonly used for precision eq
Traveling at a speed of 16.0 m/s, the driver of an automobile suddenly locks the wheels by slamming on the brakes. The coefficient of kinetic friction between the tires and the roa
Q. Define Pressure- retaining components? Components acting as pressure envelope or boundary; breach of this envelope or boundary would lead to loss of containment and discharg
what is a micrometer
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