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

ISMB 250, WHAT IS LOAD CARRYING CAPACITY ISMB 250 OF 1.2 MTR LENGTH. PL REP...

WHAT IS LOAD CARRYING CAPACITY ISMB 250 OF 1.2 MTR LENGTH. PL REPLY

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?

Typical joint designs used in electron beam welding, TYPICAL JOINT DESIGNS ...

TYPICAL JOINT DESIGNS THAT ARE USED IN ELECTRON BEAM WELDING Butt joint : Butt joint is the preferred joint as it involves only a small amount of machining prior to wel

What do you mean by shell and tube exchangers, Q. What do you mean by Shell...

Q. What do you mean by Shell and Tube Exchangers? Shell and tube exchanger piping shall be arranged to provide clearance overhead at both bonnet and channel ends. Piping shall

Find out the velocity of the bullet, Find out the velocity of the bullet: ...

Find out the velocity of the bullet: A bullet of weight W 1   = 5 N is fired into a body B 2 of weight W 2   = 45 N suspended by a string of length L = 1 metres. Because of i

Centerless grinding machine, which type of guideways are used in centerless...

which type of guideways are used in centerless grinding machine? which are the errors find in different guideways?

Material selection for de-oiling unit, • IGF Vessel SH: CS + 1.6 mm CA +...

• IGF Vessel SH: CS + 1.6 mm CA + Internal Coating Eductor: 304L SS or alternatively, 12Cr • ORF Vessel SH: CS + 1.6mm CA + Internal Coating Mixer: 316L SS • Skim Oil T

Strain, is strain in bending important parameter to consider?

is strain in bending important parameter to consider?

Hardness of water, hardness of bore well water is less than sea water .ju...

hardness of bore well water is less than sea water .justify

What are the limitations of reversed carnot cycle, (a) What are the limitat...

(a) What are the limitations of Reversed Carnot Cycle to be used in practice for refrigeration purposes? Also derive the mathematical expression of COP for reversed carnot cycle.

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