About how much coal is consumed per square foot of grate in marine boilers?
The machine is also used for turning the edge of the flanges which some makers prefer to have on the end plates of marine boilers.
Where does the most rapid wasting occur in marine boilers?
Where fresh water is used, as in land boilers, the slide may be made of hardened steel; and in the case of marine boilers, it may be constructed of gun-metal.
The form and arrangement of the water-spaces and flues in marine boilers may be collected from the sections of the boilers used in some of the government steamers, exhibited in figs.
In marine boilers it has been the practice recently to clothe the boiler and steam-pipes with a coating of felt, which is attended with a similar effect.
The thickness of the stratum of coal upon the grate should depend upon the intensity of the draught: in ordinary land or marine boilers it should be thin, whereas in locomotive boilers it requires to be much thicker.
Indeed, a strain at all approaching that upon locomotive boilers would be very unsafe in the case of marine boilers, on account of the corrosion, both internal and external, to which marine boilers are subject.
In marine boilers, weak flues and weak ends have also led to explosion, in addition to the other causes mentioned above.
In marine boilers, constant attention is necessary to get rid of the saline deposit; and in stationary boilers using impure water an equally systematic attention is needed to get rid of the earthy deposit.
In ordinary land boilers and in marine boilers of all types the plates and stays are almost invariably made of mild steel.
The above list will hopefully provide you with a few useful examples demonstrating the appropriate usage of "marine boilers" in a variety of sentences. We hope that you will now be able to make sentences using this group of words.
