1, water pressure required for water supply:

① Water supply inlet: 1 10m layer; ; Second floor12m; ; For floors with three or more floors, press 4 (n+ 1), where n is the number of floors.

② Water supply:

In general, the water pressure in front of the household water meter should be 0.10 ~ 0.15 MPa;

When the pressure of household water supply is greater than 0.35MPa, the pressure should be reduced;

The hydrostatic pressure in the water supply area should not be greater than 0.45 MPa；;

The maximum pressure of water supply fittings of sanitary ware shall not be greater than 0.60 MPa.

③ Fire fighting:

The tap pressure of hydrant mouth (7m, 10m, 13m water filling column) is 15m, 20m and 25m；;

(Note: press the faucet SN65, the water gun d 19, the linen hose 25m, and the pressure of the rubber-lined hose faucet can be reduced by 2m);

When the fire hydrant mouth is greater than 0.35MPa, the pressure should be reduced (mainly considering throttling);

The hydrant mouth greater than 0.5MPa should be decompressed;

The static pressure of fire hydrant mouth should not be greater than1.0 MPa; ;

The working pressure of spray water distribution pipeline should not be greater than1.2 MPa; ; (Pipe behind wet alarm valve)

The height difference of spray alarm valve group should be ≯ 50m;

The inlet pressure of water spray distribution pipe should be ≯0.40MPa.

(4) Pump head estimation:

The lift of domestic water pump is: h = 4 (n+ 1), where n is the number of floors in meters;

Safety factor of water pump: 1.05 ~ 1. 1.

Indoor hydrant water pump: h+11(m);

Safety factor of water pump: 1.05

Spray water pump: H+22 (m).

Safety factor of water pump: 1.05

2. Local head loss (percentage of head loss along the line):

Domestic water supply, 20%; Automatic water spraying, 20%; Fire hydrant, 10%.

3. Head loss of main fittings:

Residential water meter 1m, total water meter 3m, pipeline filter 1m, backflow preventer 3 ~ 5m, wet alarm valve 4m, water flow indicator 2m and deluge valve 7m.

4, commonly used sanitary ware water equivalent:

(1) toilet self-closing flush valve 6.0, bathtub, mop basin, washbasin, washing machine, 1.0,

Shower, washbasin, washbasin, 0.75, automatic flushing valve of flushing tank, urinal, 0.5.

② The rated flow of sanitary ware is equivalent to /5.

5, commonly used sanitary ware drainage equivalent:

① toilet self-closing flushing valve 3.6, medical urinal, toilet for flushing water tank 4.5, bathtub 3.0, washing machine 1.5, mop pool, washbasin (each faucet) 1.0, washbasin 0.75, shower 0.45, washbasin and urinal automatic flushing valve 0.3.

② The drainage flow of sanitary ware is equivalent to /3.

6, hot water quality treatment and decompression measures

(1) If the cooling water volume is greater than 1000 m3/h, devices such as water quality stabilization treatment, sterilization and algae removal and bypass treatment shall be set up.

(2) The hot laundry water (calculated at 60℃) is ≥ 10 m3/day, and the total hardness of raw water (calculated at CaCO3) is > 300 mg/L, which should be softened. The total hardness of raw water (calculated by CaCO3) is 150 ~ 300mg/L, so it should be softened.

③ Domestic hot water (calculated at 60℃) ≥ 10 m3/day, and the total hardness of raw water (calculated at CaCO3) > 300 mg/L, which should be softened or treated with scale and corrosion inhibition.

④ For domestic hot water (calculated at 60℃) ≤ 30m3/day, a pressure relief valve can be used; For domestic hot water > 30m3/day, a pressure expansion water tank should be set.

7, water supply speed limit:

① Water supply pipe (hot water pipe): DN 15-20, ≤1.0 (0.8) m/s; DN25-40, ≤ 1.2( 1.0) m/s; DN50-70, ≤ 1.5( 1.2) m/s; DN≥80, ≤ 1.8( 1.2) m/s 。

② Fire hose: fire hydrant 2.5m/s, automatic sprinkler 5.0m/s. ..

③ Water pump suction pipe: 0.8 ~ 1.2m/s

(4) cooling water pipe: the main circulating pipe DN≤250mm,1.5-2.0m/s; 250 300， 15 1~300，5 1~ 150)。

(2) underground garage/kloc-vehicles above 0/0.

③ First-class garage (garage > 15).

2 1, civil air defense projects need to be equipped with automatic sprinkler.

(1) Civil air defense projects with a building area greater than 1000 square meters.

(2) places for singing and dancing, entertainment, entertainment and projection.

③ Underground shops with a building area of more than 500 square meters.

22. The number of standard nozzles controlled by water distribution pipes in hazardous places:

Note: Table 8.0.7 of GB50084-200 1 cannot be applied, and the pressure balance should be considered according to Article 8.0.5 of the specification (so that the pressure difference before and after the water distribution network will not be too large, resulting in excessive nozzle flow deviation); DN25， 1； DN32，2； DN40，3 ~ 4； DN50，5 ~ 6；

DN70，7 ~ 9； DN80， 10 ~ 12； DN 100， 13 ~ 16。

23, spray glass ball nozzle:

Vertical ZSTZ, vertical ZSTX, suspended ceiling ZSTD, vertical ZSTZB with side wall, horizontal ZSTSB with side wall.

The discharge coefficient k = 80 (dn 15), k = 1 15 (dn20), k = 160 (dn25), k = 200 (dn32),

Selection principle: general ambient temperature +30.

57℃, orange; 68℃, red; 79℃, yellow; 93℃, green; 14 1℃, blue.

24, pipeline test pressure

① Indoor and outdoor water supply, reclaimed water, fire hydrant system and outdoor hot water system with working pressure ≤ 1.0MPa: 1.5 times the working pressure, but not less than 0.6MPa.

② Indoor hot water system and steam hot water heating system with working pressure ≤ 1.0MPa: the working pressure at the apex of the system is 0. 1MPa, not less than 0.3MPa (apex pressure). Heat exchanger: 1.5 times the working pressure.

③ Automatic sprinkler system: when the working pressure is ≤ 1.0MPa, it is 1.5 times of the working pressure and not less than1.4 MPa; ; When the working pressure is > > 1.0MPa, add 0.4MPa to the working pressure.

④ The strength test pressure of the valve is 1.5 times of the nominal pressure, and the tightness test pressure is1./kloc-0 times of the nominal pressure.

25, gas fire extinguishing system protection requirements

① heptafluoropropane, IG54 1, aerosol: pipe network fire extinguishing system, the area should not be greater than 800 square meters, and the volume should not be greater than 3600 cubic meters; Precast fire extinguishing system, the area should not be greater than 500m2, and the volume should not be greater than1600m3.

② The joint distribution system should not protect more than 8 protected areas. The number of prefabricated fire extinguishing devices in a protected area should not exceed 10, and they can be started at the same time, and the time difference of their action response should not be greater than 2s.

26, ultra-fine dry powder fire extinguishing device reserve requirements

(1) Assembled fire extinguishing device, with an area of not more than 500m2 and a volume of not more than 2000m3.

(2) Protected areas or protected objects shall be protected by a set of prefabricated fire extinguishing devices. There should be no more than 4 sets of prefabricated fire extinguishing devices used in a protected area or protected object, and they should be started at the same time, and the time difference of their action response should not be greater than 2s.

27, plastic pipe code:

Polybutene, Pb; Crosslinked polyethylene, PEX；; ; Keywords modified polypropylene, PPR；; ; Aluminum-plastic composite pipe, paper; ; Glass steel pipe, glass fiber reinforced plastic; ; High density polyethylene; ; Low plastic polyvinyl chloride, UPVC；; Chlorinated polyvinyl chloride; ; Acrylonitrile-butadiene-styrene,

engineering plastics

28, commonly used unit conversion

① Heat: 1cal (calories) = 0.001kcal = 4.186j (joules); 1 kcal = 1 kcal (card)

② Heat consumption: 10000 kcal/hour =1.16kw; 1W (watt) =1j/s = 3.6kj/h.

③ pressure:1bar =1kg/cm2 =100kpa = 0.1MPa =10mh2o; 1 MPa = 100 H2O

④ Area: 1ha (hectare) = 1 0000m2 (square meter) =15mu,1mu = 666.67m2 (square meter).

29, commonly used sanitary ware installation atlas

① toilet flushing water tank: 09S304-72

② washbasin: ordinary cold and hot water 09S304-4 1, hydraulic pedal single cold water 09S304-6 1, hydraulic pedal cold and hot water 09S304-60.

③ Flushing valve squatting pan: ordinary self-closing flushing valve 09S304-87 and hydraulic pedal flushing valve 09S304-89 or 90.

④ Flushing water tank squatting pan: ordinary flushing water tank 09S304-83 (two-stage) or 84 (first-stage) and hydraulic pedal flushing water tank 09S304-86 (first-stage).

⑤ urinals: ordinary self-closing flush valve suspension type 09S304-99, hydraulic pedal flush valve suspension type 09S304- 10 1 or 102 or 103, and hydraulic pedal flush valve vertical type 09S304- 104.

⑥ Shower: ordinary cold and hot water 09S304- 128, single hydraulic pedal 09S304- 137 or 138, double hydraulic pedal 09S304- 132.

⑦ Bathtub: mixed hot and cold water 09S304- 1 17.

⑧ Washball: ordinary single cold water 09S304-7, hydraulic pedal single pipe 09S304- 10.

Pet-name ruby kitchen pool: ordinary single cold water 09S304-30 (single), 32 (double), hydraulic pedal single pipe 09S304-34.

Attending washbasin 09S304-26

30. In addition to "high specification and low specification", the indoor fire protection design of some special buildings should also be based on the following specifications:

① Garage, Garage and Parking Lot: Code for Fire Protection Design of Garage, Garage and Parking Lot (GB50067-97).

② Civil air defense works: Code for Fire Protection Design of Civil Air Defense Works (GB50098-2009)

③ Petrochemical industry: Code for Fire Protection Design of Petrochemical Enterprises (GB50160-92 (version1999).

④ Gas stations and filling stations: Code for Design and Construction of Automobile Petroleum Filling Stations (GB 50 156-2002).

⑤ Sports Building: Code for Design of Sports Building JGJ3 1-2003.

⑥ Theater Building: Code for Design of Theater Building (JGJ57-2000)

⑦ Archives Building: Code for Design of Archives Building JGJ25-2000.

⑧ Library building: Code for design of library building JGJ38-99.

Pet-name ruby Radio and Television Buildings: Code for Fire Protection Design of Radio and Television Buildings (GY 5067-2003)

Attending bank vault and bank business vault: the industry standard of bank vault JR/T0003-2000.

Hospital: Technical Specification for Building of Hospital Clean Operating Room and Building Standard for Hospital Clean Operating Room.

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