给排水设计施工说明.doc

I Design Basis1. Drawing documents provided and the design conditions provided by the Owner2. the current relevant national specificationsDesign Specification of Auntomatic Water Spraying and Fire Extinguishing System GB50084-2001(2005 EDITION)Architecure and Design Fire Safety Rules GB50016-2006Design Specification of Fire-extinguisher ConfigurationDesign Specification of Water supply and drainageDesign Specification of exterior water supplyDesign Specification of exterior water drainageII. Design scope1. The design covers the water supply and drainage, fire fighting and water spraying system of the unit.III. Piping system and water quantityThe 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 systemSet 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 toilet3. rain water system1) adopt the siphon rainwater system for the roof rain water, use patented stainless bottom Silico-manganese alloy water bucket2) 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 material3) 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 / Sd. 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 04S202g. install 4 sets of water pump shifting coupling for the exterior to connect the interior pipe system.6. Auntomatic water spraying fire extinguishing systemThe 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 systemTransformer 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 Descriprtion1. pipe materials1) life water supply pipe:a. use PPR water supply pipe for life water supplyb. exterior embedded water supply pipe: double-wall corrugated pipe connectionc. pipes connected to submersible sewage pump: Steel wire frame composite pipe, groove type or flange connectiond. interior rain water vertical pipe and suspended pipe: HDPE pipe, hot melt connectione. overflow pipe and drain pipe: Galvanized steel pipe, fange connection3) fire water supply pipe:a. fire hydrant water supply pipe: use interior and exterior walled galvanized steel pipe when the pipe pressure is less than 1.0mpa; use seamless pipe, flange or groove connection when the pressure is more than 1.0mpa. Flange connection for the valves and the work pressure is 2.0mpa.b. automatic spray pipe: use interior and exterior walled galvanized steel pipe when the pipe pressure is less than 1.0mpa; use seamless pipe when the pressure is more than 1.0mpa. groove mechanical joint for the valves and the work pressure is 2.0mpa.2. valve:a. life water supply pipe: total Cu slide valve, the work pressure is 1.6mpa.c. fire water supply pipe: for fire pump suction pipe, use ductile iron valve, for other parts, use ductile iron gate valve or two-way type valved. The pressure valve, use copper pipes ductile iron casing valve, working pressure 1.0 mpa.e. Check Valve: life water supply pumps, fire pumps are installed with the outlet pipe muffler valve water hammer, other parts with ordinary check valvef. reducing valve: living water supply systems with adjustable pilot operated pressure reducing valve. Before installing valve, all pipes shall be clean. Before valve filter, regularly clean and remove debris.3 fittings:a. Public health and residential toilet, use anti-back overflow drain, grate were chrome-plated products, to seal leakage height of not less than 50mmb. use copper product for ground clean mouth, cleaning surface equal to the ground level.c. roof with siphon rain bucket.d. All water fittings are made of water-saving products4. Sanitary ware:a. The sanitary equipment of the works shall be all ceramic ware products, color and decoration are to be determined by the owner.b. use the the inductive sanitary ware for public toilets.c. water supply and sanitary drainage metal fittings should be used with water-saving sanitary ware.5 Pipe laying:a. all the water supply pipes shall be concealled installedb water supply riser through the floor should be set casing. The casing installed in the floor should be higher than the decorative inner surface 20mm; the casing installed in the bathroom with its top 50mm up the decorative surface, the bottom of the face should be flat with the floor; the gap between the casing and the pipe should be used flame retardant dense material and waterproof grease fill real, smooth face wearing a floor drain holes should be set aside. After completion of pipeline installation hole density, riser height should be set around the floor surface elevation of 10-20mm water-blocking design circles.c pipeline through reinforced concrete walls, floor and beam, holes and casing shall be preset according to pipe elevation, location; pipe through the basement wall and the pool wall, waterproof casing shall be embedded .6 pipeline slopea water supply pipe by slope 0.002-0.005 to water drawoff device. Fire fighting pipe by slope 0.005 to water drawoff device.b otherwise indicated, drainage slope shall be laid as follows:Pipe diameter mmDN50 DN75DN100DN150Sewage water pipe standard slope0.0350.0250.020.01Rain water pipe standard slope-0.020.01c. the joint parts of tool aeration pipe and aeration vertical pipe shall be over the sanitary wares overflow points, with the slope of 0.01 to the aeration pipe.7. Relationship between PVC-U,PPR water supply plastic pipe outside diameter and nominal diameterPlastic pipe outside diameter2025324050637590110Norminal diameter15202532405065801008. Relationship between PVC-U, water drainage plastic pipe outside diameter and nominal diameterPlastic pipe outside diameter5075110160Norminal diameter50751001509. Hole size for the water supply and drainage pipe through floor slabPipe diameterDN150DN100DN50-70DN20-50Fllor drainCleaning eyeSet hole2001501208020020010. Set hole size of water strongNorminal diameter mm15-25324050-80100150Set casing pipe mm50708014015920311 pipe support1) pipe supports or pipe should be fixed on the floor or load-bearing structure.2) use damping hanger or bracket in the pump room.3) steel mounting bracket, bracket spacing shall be in accordance with the Building Water Supply&Drainage and Heating Works Construction Quality Acceptance Specification GB50242-20024) hanger or clamp on the drain shall be fixed on the load-bearing structure, horizontal tube not over 2m, the riser shall not exceed 3m, storey is less than or equal to 4m, a fastener can be installed in the middle of the riser.5) the distance between the nozzle and the hanger of automatic spraying pipe should not be less than 300mm, distance to the end nozzle is not more than 750mm, hangers should be located between the pipe adjacent the nozzle, when the nozzle spacing is not greater than 3.6m, the a cut off device less than 1.8m can be set.6) All the bottom riser and horizontal connections of drainage section should be encrypted and fixed (set up bracket along the wall columns as possible) to prevent the damage by the gravity flow.7) The checkpoints of drain risers maintains 1.00m to the ground or floor surface. Fire hydrant bolt to the ground or floor surface 1.10m.12 Pipe connection1) for the connection of sewers and pipes, direct three connections and four connection shall not be used.2) If sewage riser offset,use two 45 bends.3) sewage pipe and riser and horizontal discharge pipe connection, use two 45 bends, and the bottom riser pipe should be located at the buttress.4) The adjustable sprinkler system piping should be used when different-diameter pipe connection,.5) valve installed, the handle should be easy for operation. Concealed in the tube-wells, ceiling pipes, valves and check the setting where the mouth should be set up access door, access door approach detailed construction drawings.6) pumps, equipment and other basic bolt hole, to the arrival of actual size.13 pipes and equipment warm1) All leakage to the sewer and cinemas fire anti-condensation insulation pipes are made using 30mm thick glass wool outsourcing foil protection.2) The insulation should be completed and put pressure on rust anti-corrosion treatment qualified for.14 anti-corrosion and paint1) brushing paint, should remove surface dust, dirt, rust, slag and other materials. Brushing paint thickness should be uniform.May not have peeling, bubbles, flow or leakage painted and so on.2), overflow, vent pipe wall paint brush blue reconcile two.3) pressure pipes wall paint brush gray reconcile two.4) water pipe wall color and paint two white-washed.5) Brush fire hydrant pipe minium two, red mixed paint two. Sprinkler pipe brush minium two, red yellow ring mixed paint two.6) pipe insulation: the insulation, the shell Fanghuo Qi two in the brush, brush the blue ring to the outer pipe, drain brush outside the black ring.7) After the pipe stand rust minium, two brush, gray mixed paint two. But the brass should be at home with rubber isolated between brackets.8) made of reinforced concrete pool wall layer of glass cloth, and require a layer of glass cloth layer of non-toxic epoxy staggered construction, the bonding chamber should be no gap, and then painted enamel non-toxic anti-corrosion coating; pool inside the pipe, ladder and accessories brush non-toxic enamel anti-corrosion coatings, fire water do double-manholes, sealing the inner and outer lock, to prevent straying.15 Pipeline pressure1) life to the test pressure pump outlet pipe for the residential portion of the high area 2.0mpa, low into 1.2mpa, public buildings for the living water test pressure 1.2mpa, water condensate added to the test pressure 1.0mpa, test methods should be building water and heating Construction Quality Acceptance GB50242-2002 regulations.5) concealed or underground drains in the irrigation experiment must be done before hidden, the irrigation should not be less than the height of the bottom edge of sanitary wareTest method: full of water 15 minutes after the water drop, then filled observation for 5 minutes, liquid drop, no leakage of pipelines and structures for qualified, and the main riser and horizontal drainage pipe for pipelines shall be seeking to do the same test, pass the ball ball diameter sewer pipe not less than 2 / 3, through ball bearing rate must reach 100% qualified, specifically refer to water supply and drainage and Heating Engineering Construction Quality Acceptance GB50242-2002.6) sewage risers, cross mains water supply and drainage also should be building and Heating Engineering Construction Quality Acceptance.7) tank full of water tests should be international 02S101 (rectangular to water tank) in the request; reinforced concrete pool filled with water testing, 24h revealed infiltration rate should be less than 1 / 1000, water supply and drainage structures should be specific construction and acceptance of GB50141- 2002 requested the Executive.8) The pressure sewer drainage pump head by 2 times the pressure test, for 30 minutes, no leakage is qualified.9) Hydrostatic test of the test system or test gauge should be located in the lowest part of the site.16 pipeline flushing1) water supply piping system flushing and disinfection before the water is running, require that not less than 1.5m / s flow rate of wash, and in accordance with Building Water and Heating Engineering Construction Quality Acceptance GB50242-2002 in the provisions of Article 4.2.3.2) rinse with water pipes and drainage pipes flow to pass.3) Fire Water pipe flushing:Outdoor fire hydrant water supply system and the automatic sprinkler system water supply pipe connected to the outdoors before the outdoor water rinse, wash intensity should reach its maximum design fire flow.4) outdoor fire h