How to Buy Steam boiler

When you want to buy one steam boiler ,what should you know ?

There are mainly four aspects:
1.What is the steam boiler capacity (t/h)?
2.What is the steam pressure(1mpa=10bar=150psi=10atm)?
3.What is the steam temperature(℃) ,satrurated or superheat temperature?
4.What is the feed water temperature(℃)?

Besides the four parts , we also should know
(1)The voltage of steam boiler location ,single and three phase should be provided.
(2)The altitude of the steam boiler location , usually the altitude of steam boiler we designed is less than 500m, so if the altitude of steam boiler location is more than 500 m, maybe we should redesign the boiler plan.
(3)The environment protection standard of the boiler location, we should know the Nox emission standard about the gas/oil fired steam boiler especially for the natural gas fired boiler. We should know the dust emission standard for the coal and biomass boiler .It has big effect on the whole price.
(4)About the fule, it is better to have the analysis report etc.
(5)The boiler feed water quality report should be gave if you have.
These above are the main information we should know before we designng the boiler plan.