i have to use 10 kg/cm2 of steam.so what is the design of coil?
You are going to need to know the temperature of the steam and the equations for coil heat exchangers. I'm not sure if those equations exist but thats what you would need. There's also many specifications you would need to perform the calculations, such as wall thickness, materials used, flow rate, etc. Basically, your question can't be accurately answered without more information. It sounds like more of an experimental process.
