They can be depending on the material you are welding. Most hot plate welders have a ventilation system that will evacuate fumes from the inside of the welder. This greatly reduces the risk to the operator.
yes
The biggest application of explosion welding is the cladding of flat plate.
welding current for 2mm thick. ms plate
Totally depends on what the boiler plate is made up of. Normally this data is supplied to the welder operator.
the welding amperage being used
flat, horizontal, vertical and over head position
The Type of welding you are doing, the brightness of the arc.
bennox is a high carbon steel material so low hydrogen or carbon steel electrodes are recommended
To support the molten metal while it is cooling
Yes. However, there are paints designed to be compatible with welding as they are designed to protect the surface of the plate from corrosion while in storage. In every code or specification, it is specifically stated that welding should be done on clean metal. Welding over paint is discouraged.
The STRA test is a test of the thickness ductility of a steel plate (the Z direction).
As a GENERAL rule plate covers are legal as long as they do not change the colors of the license plate or obscure the letters/numbers or state of issue in any way.(note: due to the discoloring action of the sun on plastics, some so-called 'clear' plastics tend to turn yellow pretty quickly - once that occurs they are no longer 'clear.')