Hardness testing, Mechanical Engineering

Assignment Help:

After final PWHT, the hardness of the deposited weld metal and heat affected zone (HAZ) shall be examined. Hardness values shall not exceed 200 BHN. Heat treatment shall be performed, if required to reduce hardness to the specified level, subject to review and approval by WorleyParsons Canada.

On drums, hardness shall be measured one on each of the following welded areas:

a. Circumferential

b. Longitudinal

c. Nozzle

d. Stub

e. Attachment

Hardness test shall be made with a Brinell Testing machine or a portable hardness tester such as a Telebrineller using a 10 mm (3/8") ball.

Submerged arc weld, SAW shall be tested for hardness on the weld and on the HAZ. The values shall not exceed 200 BHN.

Where required value of BHN is not achieved, the fabricator shall perform a retest without any heat treatment whatsoever. If this second test fails to meet the BHN requirement, heat treatment shall be repeated. Methods and procedures for anticipated second heat treatment shall be pre-approved by WorleyParsons Canada.


Related Discussions:- Hardness testing

Calculate force transmitted by the man on the floor of lift, Calculate forc...

Calculate force transmitted by the man on the floor of lift: A vertical lift having total mass 500Kg acquires an upward velocity of 2m/sec over a distance of 3m of motion w

Frames, Frames: You have been introduced to the analysis of frames. By...

Frames: You have been introduced to the analysis of frames. By going through this unit, you may identify frames and differentiate them from trusses. The method for analyzing f

Principle of superposition, Principle of superposition: Explain the p...

Principle of superposition: Explain the principle of superposition. Sol.: A machine member is subjected to number of forces acting on its outer edges and also at some

Thermal, Prove that energy is a property of system

Prove that energy is a property of system

If o ring found to be leaking-oil seal is found be leak, If "o" ring is fou...

If "o" ring is found to be leaking or oil seal is found to be leaking check as mentioned: If "O" ring found to be leaking change "O" rings. If oil seal found to be leaking check o

Define what is nose radius, Define What is Nose Radius? The nose radius...

Define What is Nose Radius? The nose radius is provided to increase finish and strength of the cutting tip of the tool. Small radii will produce smooth finish and are used on t

Explain the uses of residual soils, Explain the uses of Residual soils ...

Explain the uses of Residual soils Residual soils may be underlain by sloping rock which may contain weathered seams. The possibility of foundations sliding on these seams have

Define pressure- retaining components, Q. Define Pressure- retaining compon...

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

Current-fundamentals of electricity , Fundamentals of Electricity Cu...

Fundamentals of Electricity Current: The flow rate of charge or electrons with respect to time is known as current. It is measured in ampere (A).

Find out its centre of gravity, Find out its centre of gravity: A squa...

Find out its centre of gravity: A square plate of uniform thickness and density is bent along M 1 M 2 till corner C coincides along with centre C′. Find out its centre of gr

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