Show 1 II Protection for Pipes II I Let t u us assume that wo we aro are tn hi a boiler holler loom room sixty foot feet long twenty te feet l high anti and tort forty feet deep It Isa Isa is isa a horsepower vcr plant four units and we find that After the boiler boner volumes vol vot- umes umea have havo ha c been deducted a free reo air airspace airspace space remains of cubic feet L Letus Lot Let Lotus t suppose that lino hue from us suppose only a supply tho the header cr bursts at a j pressure of or ISO lO pounds The v velocity of ot out outflow o ex- ex I Is i. i 1178 1173 S tout out For Foy comparison n nIt It t may bo ho noted that the tho muzzle ity ty of oC a a. rifle ball haIr haIrIs is about bout 2000 feet foet per pcr second The Tho discharge l of ot steam for Tor the ft inch five Inch c-Inch area IK is a about cubic feet per per minute to so 20 that in less ICES than han thirty t seconds the the room room will bo be with suffocating steam Think of or tho ho proportions of your boiler room of those on eu hoard board cilia chIt or In mines where pipe galleries exist and mako make a a. com corn hanson parison In Iu the tho United Stat States 6 tills this subject has hasili lu ili n tho last few y years boon beau given con cons considerable attention an and there thero aro are probablY probably probably ably not nut many mony experienced o engineers r who ho do not recommend pipe lon tion In Trance France e automat have la been compulsory pince 1886 when tho the explosions of at and team nn which killed thirty ty people leople and md s curiously 1 injured d s sixty t ot oth- oth ors em Marine boilers arc aio not governed b by this law Jaw lawIn In other European n countries countries coun coun- tries such Huch o laro aro arc now JOW being considered consid consid- ored ered and anti In Norway on a regulation ts ex exists t- t ex- ex I s s governing gove the uso of or special shutdown shutdown shut shut- down valves on marine boilers and their piping A. A A. S. S Ho In hi Engineer Engineering tug ing Magazine 1 I I j |