Explain about postweld heat treatment, Mechanical Engineering

Assignment Help:

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.


Related Discussions:- Explain about postweld heat treatment

Evaluate the tension in the rope, Evaluate the tension in the rope: De...

Evaluate the tension in the rope: Determine the tension in the rope. Solution KE of the free-body of flywheel is developed due to (i) work-done by tension T in the rop

Stress and deflection analysis in i-beam, You are required to formulate the...

You are required to formulate the loading and boundary conditions using the FE code and evaluate the stress distribution and end deflection of the beam using the ABAQUS code and vi

Derive heat transfer and work transfer expression, Derive heat transfer and...

Derive heat transfer and work transfer expression in an non-flow or closed isothermal and polytropic procedure?

Determining the largest eigenvalue, The Power Method is a classic numerical...

The Power Method is a classic numerical algorithm for determining the largest eigenvalue and eigenvector associated with a matrix A. Write a matlab function that returns the larges

Capp, explain capacity planning system

explain capacity planning system

Describe the terms refrigeration and air-conditioning, (a) Describe the ter...

(a) Describe the terms "Refrigeration" and "Air-conditioning". Determine the units of Refrigeration ? (b) The capacity of refrigeration is 400 TR when working between -6 o C and

Evaluate the stresses in the steel and concrete bars, A load of 2MN is appl...

A load of 2MN is applied on a short concrete column 500 mm x 500 mm. The column is reinforced with four steel bars of 10 mm diameter, one in each corner. Evaluate the stresses in t

Surface chemistry and electrochemistry of membranes, explain surfacechemist...

explain surfacechemistry and electrochemistry of membranes?

Find the maximum shear stress - stepped circular bar, Find the maximum shea...

Find the maximum shear stress - stepped circular bar: A stepped circular bar ABC 4 m long fixed at one of the end 'A' is subjected to a torque of 10 kN-m. If the portion AB is

Determine strain energy stored in coiled helical spring, Determine Strain e...

Determine Strain energy stored in coiled helical spring: For a close coiled helical spring subjected to an axial load of 200 N with 10 coils of wire of diameter 18 mm and buil

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd