Repair of surface defects in welds, Mechanical Engineering

Assignment Help:

Repair of surface defects in welds by chipping, grinding and gouging is permitted provided the thickness is not reduced below the minimum required. Removal of defects shall be verified by magnetic particle or liquid penetrant examination.

Major defects in weld and base metals, shall be repaired after a written procedure for each individual repair has been approved by OWNER. The written procedure shall include a sketch detailing extent and location of the defect, how defects will be removed, how removal will be verified, qualified welding procedure to be used, subsequent heat treatment and non-destructive examination.

The following are the definitions of major and minor defects:

Major Defects:

Base Metal

Weld Metal

Crack

Crack, except crater cracks

Repair Cavity greater than 65 cm2 (10 in2)

Repair Cavity greater than 65 cm2 (10 in2)

Repair Cavity deeper than 50% of thickness or 12.7 mm (1/2"), whichever is less

Repair Cavity deeper than 50% of thickness or 12.7 mm (1/2"), whichever is less

Weld Build-Up to correct manufacturing error*

Lack of Fusion and/or Penetration

Edge defects greater than 25 mm (1") deep, or "t", whichever is less

 

Edge defects greater than 20% of edge length

 


Related Discussions:- Repair of surface defects in welds

What is the velocity of the crosshead - crank, What is the velocity of the ...

What is the velocity of the crosshead - crank: In the slider crank mechanism shown in Figure, the crank is rotating clockwise at 120 revolution/minute. What is the velocity of

Storage & quality of co2 gas, STORAGE & QUALITY OF CO 2 GAS CO 2 gas ...

STORAGE & QUALITY OF CO 2 GAS CO 2 gas is supplied in cylinders at a  high pressure (140 kg / cm 2 ). When the cylinder is full, nearly 90 % of the volume is filled with CO 2

Explain how chips are formed, Explain how chips are prepared in cutting and...

Explain how chips are prepared in cutting and how are they classified with sketches. What are the factors responsible for creation of different forms of chips?

Plant maintenance, which book is prefferable for plant maintenance?

which book is prefferable for plant maintenance?

DEVELOP A COMPUTER PROGRAM, Develop a computer program that can be used for...

Develop a computer program that can be used for internal flow analysis in SI units. The program should be able to: ? Get the required input data from the user ? Decide the flow ty

Determine the load on beam, Determine the load on beam: A rectangular ...

Determine the load on beam: A rectangular beam of width 200 mm and depth 300 mm is simply supported over a span of 5 m. determine the load that the beam may carry per metre le

Physics, difference brtween parallel and unlike parallel forces

difference brtween parallel and unlike parallel forces

Find the twist of a circular hollow shaft, Find the twist of a circular hol...

Find the twist of a circular hollow shaft: Discover the twist per metre length of a circular hollow shaft having 120 mm outer diameter and 90 mm inner diameter, respectively,

Lathe - milling and grinding machine, Define O.R. and what are the applicat...

Define O.R. and what are the applications in Industry ? A firm uses lathe, milling and Grinding machine to make two machine parts. The table below show the machining time requir

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