Customer from Thailand visited our factory and checked our production line for the mist water fog cannon.


Customer from Thailand visited our factory and checked our production line for the mist water fog cannon. via Facebook https://ift.tt/2zgxEte

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What are the qualities of a good weld?

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Welds may be specified by fairly detailed codes which will set out the exact properties required for a specific application. Some general criteria are : Penetration: how far the weld penetrates into the joint, often expressed as a percentage. This is a combination of how the joint is prepared and set up, the process used and the current/voltage applied. It is possible to have both too little (weak joint) and too much (poor finish in the back side of the joint) penetration. Defects: including porosity caused by contamination of the weld due to inadequate preparation/cleaning or inadequate shielding, craters caused by reducing current too rapidly at the end of a run, cold starts (poor penetration at the start of a run) Undercutting: thinning of the parent metal at the edges of the weld usually caused by not enough filler metal relative to current. appearance: welds should have a reasonably smooth, uniform and consistent appearance Oxidation: welds need adequate shie...
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