给排水设计施工说明

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I. Design Basis 1. Drawing documents provided and the design conditions provided by the Owner 2. the current relevant national specifications Design Specification of Auntomatic Water Spraying and Fire Extinguishing System GB50084-2001(2005 EDITION) Architecure and Design Fire Safety Rules GB50016-2006 Design Specification of Fire-extinguisher Configuration Design Specification of Water supply and drainage Design Specification of exterior water supply Design Specification of exterior water drainage

II. Design scope 1. The design covers the water supply and drainage, fire fighting and water spraying system of the unit.

III. Piping system and water quantity The works includes life water supply system, life sewage water, rain water system, fire-extinguisher water supply system, automatic water spraying and gas fire extinguisher system.. 2. the water usage of interior fire extinguisher is 20L/s, exterior is 25L/S, automatic water spraying fire extinguisher system is 30L/S. 3. Life water supply system Set 300 cubic meters fire fighting water pool on basement one, 18 tons fire fighting water tank on the roof. Water spraying and fire-extinguisher share the water tank.

Parameters of the fire extinguisher pump and spary pump are not fixed. One for use, one for spare. The drawing of the fire fightinhg paum will come out after the location of the fire fighting water pool is confirmed. 3) the sewage water will be drained to municipal sewage water pipe after the septic tank processing. 4) set the tool aeration pipe and vent stack in public toilet

3. rain water system 1) adopt the siphon rainwater system for the roof rain water, use patented stainless bottom Silico-manganese alloy water bucket 2) HDPE pipes and fittings using pvc pipe or water supply, hot melt connection. When the pipeline passes through the fire district, use siphon drainage channels specially for fire rings, fireproof rings shall be fire-retardant material 3) The exterior ground rainwater will be collected by exterior rainwater paipe to municaipal rain water pipe. 4. Exterior fire hydrant water supply system: use municipal low-pressure system, exterior fire hydrant, water supply directly by the municipal, intervening space not longer than 120 meters. 5 Interior fire hydrant water supply system: a. The project is on Class 2 multi-storey commercial building, building height 8 meters, interior fire hydrant water usage 20L / S, exterior fire hydrant water usage 25L / S d. fire hydrant water supply pump control: two fire hydrant water supply pumps, spare for each other. In case of fire, the pump canbe started and alarmed by pushing any botton of fire hydrant pump, fire fighting center or water pump room. After tge pump is started, the feedback information will be sent to fire hydrant and fire fighting control center. e. Interior fire hydrant box: combined type fire hydrant cabinet with fire extinguisher, the preset hole size is 1830*730*240mm,the hole bottom is 100mm up the ground, the fire hydrant mouth shall be 65mm, monitor spout shall be 19mm, with 25m long glue hose and fire fighting reel. The fire hydrant installation height shall be the mouth 1.1m up the ground. For detailed installation, refer to 04S202

g. install 4 sets of water pump shifting coupling for the exterior to connect the interior pipe system. 6. Auntomatic water spraying fire extinguishing system The spraying system of the works shall be designed according to Chinese II, use standing type 68 degree glass ball sprinkle-nozzle, keep 10% of the the nozzle for spare.

9. Gas extinguishing system Transformer and distribution room adopts ZHG25-2X90 cabinet heptafluoro-propane fire extinguishing system, which will be fixed by the manufacturer.

10. Mobile fire extinguisher: Transformer and distribution room shall be installed with two pieces of 5kg portable drymeal Ammonium Phosphate fire extinguisher, see the detailed location on the plan. Set two pieces of 3kg ABC type fire hydrant box.

Construction Descriprtion 1. pipe materials 1) life water supply pipe: a. use PPR water supply pipe for life water supply b. exterior embedded water supply pipe: double-wall corrugated pipe connection c. pipes connected to submersible sewage pump: Steel wire frame composite pipe, groove type or flange connection d. interior rain water vertical pipe and suspended pipe: HDPE pipe, hot melt connection e. overflow pipe and drain pipe: Galvanized steel pipe, fange connection