211. Foundations. and capable of transmitting horse- -friction-clutch couplings, cut-off couplings, compression couplings, plate couplings, jaw clutches, etc., also idlers and method of applying.) (Note.-Specify character of foundation upon which shafting is to be placed, whether special foundations of brick or stone, floor timbers, walls, ceilings, posts, etc.) 212. Boiler (8). horse-power. boiler(s) (each) rated at The boiler(s) shall contain not less than of heating surface per rated horse power. The shell(s) shall be made of steel having a tensile strength of not less than and shall be braced and stayed for a working pressure of- pounds, pressure. They shall be inspected and insured by a responsible steam boiler insurance company, this contractor to furnish a certificate of inspection and a policy of insurance for Each boiler shall be provided with 213. Fittings dome or drums dry pipe } the necessary lugs, brackets, plates, bolts, stays, anchor and binder rods, man and hand holes, steam and blow-off connections, stop and safety valves, pressure gauge, water column, gauge cocks and drip, set of stoking tools consisting of —, and all other appliances properly coming under this head. The boiler(s) shall be set in masonry in 214. Setting. a first-class manner, according to standard 215. Stack. 216, Smoke Connections. 217. Piping. practice. This contractor to do all necessary excavating or filling for the foundation(s) and to remove all debris. (Specify character of soil upon which boilers will be placed.) (Note.-Specify material, diameter, height, lining, base, location, etc.) Smoke connections of, having an area -, are to be made with the stack, and are to be provided with dampers and cleaning doors arranged as follows: (Note.—If the piping is to be erected with reference to existing piping or to meet special conditions the specification must be made up with due regard to such conditions; for entirely new piping, independent of auxiliary connections, the following specification will will cover many cases.) This contractor shall furnish and erect all necessary and proper piping to pipe the entire plant. From each boiler a branch pipe shall be carried to a main header located, and from this header a branch pipe shall be carried to each engine; all branch pipes from boilers and to engines shall be provided with a valve so that any boiler or any engine may be cut out without interfering with the operation of the remainder. The valve in the engine branch shall be in addition to the throttle at the engine. The engine exhausts shall be connected to an exhaust header and each exhaust branch shall be provided with a — valve; the exhaust header shall be connected with the heater and from the heater shall be carried. (For non-condensing engines carry to atmosphere; for condensing engines to the condenser.) The exhaust from the (condenser and) feed pumps shall be carried (For non-condensing engines carry to exhaust header or atmosphere; for condensing engines carry to the condenser or to an auxiliary 218 Condensers. condensing) water by the purchaser). discharge) connecAll piping heater.) Feed ( and All live steam piping. and larger, (and also the following sections of exhaust piping - shall be neatly covered with a substantial, non-heat-conducting pipe covering. |