660 MW Coal Fired Boiler

This is not suitable for generic advice. Instead, the specific manufacturer's instructions should be followed. In particular, it will depend on the operating pressure, which was not specified.

Dear Sir,

Manufacture of this boiler is Harbin Boiler limited.

Hari Prasad

Interesting....

For a boiler of this size, I am curious to know how much is preassembled versus how many and what type of subassemblies would be further welded on site. Since your boiler will be coming from northeast China, there may be a further issue of what languages/translations may be available to assist your local staff in whatever portions of the final assembly you may be doing. I'm sure this is a large enough undertaking that they should be willing and able to furnish high quality and comprehensive technical help. Best wishes for a successful installation.

Then ask the manufacturer. There are trade secrets & intellectual rights for that. It's not instant noodles you can just buy on the corners and add hot water to fill you up.

This brings putting together Ikea units to a whole new level!

You can't be serious in that you want a construction manual