Bleed the accumulated air out of the system. I did it twice a year, to improve heating efficiency, and eliminate banging noises.
If you buy another pipe then there is a high chance that one pipe will bang but the other will be fine or the simple answer - get used to it.
Yes
When you click on the pipes, they rotate. You have to assemble a continuous pipe from the furnace to the boiler, which will shoot up a column of steam. Ride the steam up to the high shelf.
What you meant by this question is uncertain. If you are asking about the definition then Boiler steam pressure is the pressure developed by a water steam boiler, else if you are asking about the Rated boiler steam pressure then it is the safe operating pressure a boiler can operate, else if you are asking about Maximum boiler steam pressure then it is the maximum pressure that a boiler can produce with out failure.
metal + steam = boiler
If the pipes are continually knocking or banging it may be that the pressure fluctuation is causing vibration - If those pipes are not supported (clipped in to a rigid position) they will effective bang against each other or against flooring/wall supports. If they are sealed units check for air locks in the circuit - this frequently caused such noises, Also check the steam feed is uninterrupted - The effect in the pipes would be like a steam piston which builds to high pressure only to release in a sudden burst -- Also excessive condensate in the steam piping will cause knocking, usually due to improper pitch of the piping not allowing the condensate to drain properly.
steam boiler
The steam drum separated the steam from the water and stream mixture in the boiler drum.
Coil boilers work by having many steel or copper pipes surrounding the area to be heated, these pipes then have extremely hot steam running through them creating the boiling temperatures.
I have been unable to turn up any information whatsoever about anything called a 'steam coil hammer.' Is it possible you've gotten your terminology mixed up? I am hoping the following research might provide you with a satisfactory answer. [from dictionary.com] - a coil of pipe, or collection of connected pipes, for containing steam; -- used for heating, drying, etc. - A banging noise heard in a water pipe following an abrupt alteration of the flow with resultant pressure surges; A banging noise in steam pipes, caused by steam bubbles entering a cold pipe partially filled with water. And according to information found here Steam Coil Installation, Operation and Maintenance (PDF), if a steam coil is not mounted properly, water-hammer can be destructive to the coil(s) It is entirely possible that the term 'steam coil hammer' simply refers to the banging of steam coil pipes. I'm not sure this is what you were after. If not, if you can provide more details, perhaps I can do a little more research and find the answer you need.
Granville T. Woods invented the Steam Boiler Furnace
Metal + Steam = Boiler
Its Metal + Steam . That Is What Makes A Boiler . Sincerely -The Strange Answerer AKA Dgjojo2