Prakash,
If I recall correctly, you asked this question before. Maybe you should explain what it is you are actually trying to find out?

Speaking for myself, I do not know what you mean by "ARC welding in Zone II area". Does that correspond to a particular welding code?

Availability of welding machines is a bit easier. I suggest logging on to the various welding equipment manufacturer's web sites and look over their products. Their machine specification are usually listed and you can contact them directly for more specific information.

"Safety procedure in welding" can be handled in many ways. AWS publishes standard Z49.1:1999, titled "Safety in Welding, Cutting, and Allied Processes". There is good information there. Also the welding equipment manufacturers that I referred to above usually publish booklets on safe use of their products and all products in general. Many are free on request. Internet search engines will also give you some sources of information.

My reply is not "certain information" but maybe it will point you in the right direction.

Chet Guilford