【正文】 ly connect to toilets (channels). The net distance from buried water tank for drinking water to septic tank shall not be less than 10m. In case this net distance can not be secured, measures shall be taken to prevent tanks for drinking water from pollution. When drinking water is sharing water pond or water tank with water for other purpose, the body of water pond (tank) shall be independent structure. The original bottom of the building shall not be used as the wall of the water pond or water tank. Following equipment or vessels shall not be directly connected with piping of sewage or wastes and indirect drainage shall be used:1. Discharge pipe or overflow pipe of water pond or water tank for drinking water.2. Drain from food preparation or equipment washing in kitchen.3. Drain from medical equipment sterilizing.4. Drain from A/C equipment of vaporization type coolers, air cooling towers.5. The ground drain from cold storage rooms or cold storage warehouses for food or beverage and the drain from defrost water pan of air cooling machine. Sanitary Equipment and Water TreatmentArchitectural Design Specification for Comprehensive Hospital JGJ 4988 Nonmanual switch shall be provided to sinks for following rooms and measures shall be taken to prevent them from spilling:1. Examining rooms, consulting rooms, delivery room, operating rooms, testing room, doctor’s offices, nurse’s offices, treatment rooms, prescription rooms, disinfection chambers。2. Other rooms with requirements for sterilization or requirements for non interinfection. Device for controlling temperature and stabilizing pressure shall be provided to warm water supply for infant washing ponds.Design Specification for Architectural Water Supply and Drainage GBJ 1588 When sanitary wares and industrial wastes receivers are connected to sewage piping or other drainage piping which may produce hazardous gases, trap bends shall be provided bellow drainage outlet.Note: In case trap bend is structured in sanitary ware, it is not necessary to provided trap bend bellow drainage outlet. Water seal device shall be provided to the places connecting indoor draining ditch to outdoor draining pipe. The sewage containing radioactive substance, heavy metal or other toxic or hazardous substances and they do not meet the standards for draining shall be separately treated and then drained to hospital sewage treatment station or municipal drainage piping. Deodor system shall be provided to sewage treatment facilities. In case sewage treatment structure is in buildings, separate partition room shall be provided to machines of large noise in operation.2. Fuel Gas Equipment Indoor Fuel Gas PipingDesign Specification for Urban Fuel Gas GB 5002893 The maximum pressure for user’s indoor fuel gas piping shall not exceed what specified in Table Maximum Pressure for User’s Indoor Fuel Gas Piping (psi, MPa) Table User of gasMax. pressureIndustrial users and independent boiler housesPublic architectures and residence users (medium pressure users)Public architectures and residence users (low pressure users) Pressurized equipment is strictly prohibited to install above urban gas supply piping. When pressure boosting is necessary due to the supply pressure can not meet the requirement of user’s equipment, it shall meet following requirements:(1) Float buffer shall be provided before pressure boosting equipment. The capacity of the buffer shall secure that the pressure of local piping network shall not be affected when it is pressurized.(2) Low pressure protection device for piping network shall be provided before the buffer.(3) The buffer shall have automatic cutoff valve which interlocks the low limit of capacity of the buffer with boosting equipment.(4) By pass valve and outlet check valve shall be provided to the boosting equipment. Fuel gas induction pipe shall not be installed in bedrooms, bathrooms, basements, warehouses for flammable or explosive substances, rooms with corrosive media, power distribution rooms, transformer rooms, cable ditches, fume channels or air introducing channels, etc. When fuel gas induction pipe is passing through the sealed rooms, the sealed rooms shall be reformed and vent ports shall be provided. The times for venting and air changing shall not be less than 3 times per hour. When fuel gas induction pipe is passing through foundations, walls or piping channels of the building, it shall be installed in sleeve and the factor of settlement shall be taken into consideration. If it is necessary, measures for pensation shall be taken. The minimum nominal diameter of fuel gas induction pipe shall meet following requirements:(1) When delivering fuel gas of manual coal gas or mining gas, it shall not be less than 25mm。(4) Fuel gas piping shall not be installed in any ditch where corrosive media may permeate。(6) Adequate ventilation shall be provided to floors where equipment is installed and to the piping shaft where fuel gas piping is installed. Fireproof insulation layer with same fireproof limitation as the slab shall be provided to piping shaft on each floor, and convenient access door for maintenance shall be provided。(2) Adequate ventilation shall be provided. For basement and underground floor for equipment, mechanical ventilation or emergency air exhausting facilities shall be provided。(4) When fuel piping is installed together with other piping, it shall be arranged at outer side of other piping。(6) It shall be separated from telephone rooms, transformer rooms, repairing rooms and store rooms with solid walls of nonbustible material。(2) It shall be installed before gasusing equipment or burners。(4) It shall be installed before releasing and scattering pipe. Releasing and scattering pipe shall be provided to fuel gas piping of large or medium size gasusing equipment. The outlet of releasing and scattering pi