List the reasons for preparing the faying surfaces for welding.
What will be an ideal response?
Reasons for preparing the faying surfaces for welding include the following:
*Codes and standards-Some codes and standards require specific edge preparations.
*Metals-To successfully weld some metals, they must be grooved, such as thick magnesium, which
must be U-grooved, or cast-iron cracks, which must be drill stopped and grooved.
*Deeper weld penetration-With the metal removed by grooving or beveling the metal's edge, it is easier for the molten weld metal to completely fuse through the joint. In some cases it is possible to make a through thickness weld from one side.
*Smooth appearance-The weld's surface can be ground smooth with the base metal so that the weld "disappears." This can be done for appearance or so that the weld does not interfere with the sliding or moving of parts along the surface.
*Increased strength-A weld should be as strong as or stronger than the base metal being joined. By having 100% joint fusion and an appropriate amount of weld reinforcement, the weld can meet its strength requirement.
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What will be an ideal response?
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