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But, it may get complicated all too quickly when you cannot overcome the many problems that occur in the process. Most of the problems discussed in this article are common with some occurring once in a while. Understanding the causes and following the suggested procedures will help you go a long way in this line of work.

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Log In. However, I should have mentioned that this is our own internal requirements for weld roots in high fluid flow applications or in high pressure boiler tubing or piping applications. Excessive drape-thru can result in local flow disturbances downstream of a butt weld.

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March 27, Alexander L. A howling knot wind was driving rain onto the rig that had just been winched away.

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This is to:. The reason for doing this is to:. The size effect is reflected by the loss of cross-sectional area which is insignficant when compare to the shape effect.

I have heard some people say that with all welding, you must have deep or maximum penetration into the base plate in order for a weld to be strong. If you have shallow penetration, the weld is weaker. The deepest possible weld penetration is always best.

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About Advertise Contact Login. Tom Burke. Gerald R. Over the years Dantec Dynamics has supplied many solutions for the aerospace industry.

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Powered by mwForum 2. Not logged in American Welding Society Forum. By Cumminsguy71 Date

Often, the complaint is heard that a welder was working perfectly and then suddenly the operator started experiencing problems with arc stability, burnbacks or porosity in the weld. If this happens, after changing wire or gas, the new spool of wire or cylinder of gas should be checked first. Turning up the amperage to compensate will only cause melt-thru. If you were achieving satisfactory welds before changing gas, use a cylinder you know to be good and see if that corrects the problem.


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