GB502422002建筑给水排水及采暖工程施工质量验收规范EN.doc

UDCNational Standard of the Peoples Republic of ChinaP GB 50242-2002 建筑给水排水及采暖工程施工质量验收规范Code for Acceptance of Construction Qualityof Water Supply Drainage and Heating WorksIssued on March 15 2002 Executed on April 1 2002 Jointly Promulgated by the Ministry of Construction and the State General Administration for Quality Supervision and Inspection and Quarantine of the Peoples Republic of ChinaNational Standard of the Peoples Republic of China建筑给水排水及采暖工程施工质量验收规范Code for Acceptance of Construction Qualityof Water Supply Drainage and Heating WorksGB 50242-2002Compiled by: Construction Department of Liaoning ProvinceApproved by: Ministry of Construction of the P.R.C.Executed on: April 1 2002China Building Materials Industry Printing House2002 BeijingNotice on Issuing the National Standard of the Code for Acceptance of Construction Quality of Water Supply Drainage and Heating WorksJ.B. 2002 NO. 62 DocumentPursuant to the Notice on the Printing and Distribution of Modification Plans of National Standards for Engineering Construction in 19951996 (J.B. 1997 NO.4), this Code for Acceptance of Construction Quality of Water Supply Drainage and Heating Works is rectified jointly by the Construction Department of Liaoning Province and other relevant departments. Our ministry has arranged for the examination by related departments of the Code and hereby approved it as a national standard with the serial number of GB 50242-2002 and to be effective on April 1 2002. The 3.3.2, 3.3.16, 4.1.2, 4.2.3, 4.3.1, 5.2.1, 8.2.1, 8.3.1, 8.5.1, 8.5.2, 8.6.1, 8.6.3, 9.2.7, 10.2.1, 11.3.3, 13.2.6, 13.4.1, 13.4.4, 13.5.3 and 13.6.1 articles hereof are compulsory and must be strictly and exactly performed. Upon the execution of this Code, the original Code for Quality Acceptance of Heating and Sanitary Engineering GBJ242-82 and any related parts in Code for Quality Inspection and Acceptance of Building Heating and Sanitary and Gas Engineering GBJ302-88 with respect of heating and sanitary engineering shall be abolished and terminated immediately.As regards this Code, the Ministry of Construction of the P.R.C is responsible for its administration and interpretation with respect to the aforementioned compulsory articles, the Rural and Urban Construction Commission of Shenyang undertakes the interpretation of and in connection with detailed technical contents, and the standard quota institute under the Ministry of Construction arranges for the publishing and distribution from time to time by the China Building Materials Industry Printing House.Ministry of Construction of the P.R.C.March 15 2002Table of Contents1 General Rules12 Definition of Terms23 Basic Regulations53.1 Quality Management53.2 Management of Equipment and Material53.3 Quality Control of Construction Process64 Installation of Indoor Water Supply System104.1 Basic Regulations104.2 Installation of Water Supply Pipes and Fittings114.3 Installation of Indoor Fire Plug System134.4 Installation of Water Supply Equipment135 The Installation of Indoor Drainage System165.1 Basic Regulations165.2 The Installation of Drainage System and Its Accessories165.3 The Installation of Rain Drainage System and Its Accessories206 The Installation of Indoor Hot Water Supply System226.1 Basic Regulations226.2 The Installation of Plumbing and Its Accessories226.3 The Installation of Accessory Parts237 The Installation of the Toilet Equipments267.1 The Basic Regulations267.2 The Installation of the Toilet Equipments317.3 The Installation of the Water-Supplying Fittings of the Toilet Equipments327.4 The Installation of the Drainpipes338. The Installation of the Inside Heating System378.1 The Basic Regulations378.2 The Installation of the Pipes and Their Fittings378.3 Installation of the Assistant Equipments and the Radiators408.4 The Installation of the Radiating Board428.5 The Installation of the Low-Temperature Hot-Water Radiating Heating System under the Ground428.6 The Water Pressure Experiments and the Debugging of the System439.Installing Outdoors Water-Supplying Pipes459.1 The Basic Regulations459.2 Installing water-supplying pipes459.3 The Installation of the Jointing Machine of the Fire Water Pumps and the Outdoors Fire Hydrant499.4 The Channels of the Pipes and the Inter Space of the Wells5010 The Installation of the Outdoors Net of the Drainpipes5210.1 The Basic Regulations5210.2 The Installation of the Drainpipes5210.3 The Channels of the Drainpipes and the Wells5411 The Installation of the Outdoors Net of Heating Pipes5511.1 The Basic Regulations5511.2 The Installation of the Pipes and Their Fittings5511.3 The Water Pressure Experiment and Debugging of the System5812 The Installation of the Water System in the Buildings and the Swimming Pool System5912.1 The Basic Regulations5912.2 The Installation of the Pipes of the freshwater Systems in the Building and Their Supporting Equipments5912.3 The Installation of the Swimming Pool Water Systems6013 The Installation of the Heating Boiler and Its Supporting Equipments6113.1 The Basic Regulations6113.2 The Installation of the Boilers6113.3 The Installation of the Supporting Equipments and the Pipes6813.4 The Installation of Security Fittings7113.5 Baker, Boiler and the Experimental Operation7313.6 The Installation of the Warm-Exchanging Station7414 The Examination of the Quality of the Sections (or Subsections)75Appendix A77Appendix B78Appendix C80Appendix D81Appendix E821 General Rules1.0.1 For the purpose of enhancing the management of engineering quality and unifying acceptance rules on construction quality of buildings water supply and drainage and heating works so as to ensure engineering quality, this Code is hereby made as follows.1.0.2 This Code shall be applicable to the quality acceptance of water supply and drainage and heating works of buildings.1.0.3 Quality acceptance requirements adopted in all and any engineering technical documents and contracting documents for buildings water supply and drainage and heating works shall at least attain the stipulations set forth hereof.1.0.4 This Code shall be used in cooperation with the Unified Standard for Quality Acceptance of Building Engineering GB 50300 that is currently in force and effective.1.0.5 Quality acceptance of buildings water supply and drainage and heating works shall, in addition to this Code, comply with other related national codes and standards that are currently in force and effective.2 Definition of Terms2.0.1 Water supply systemA network transmitting water to the consumption sites through pipelines and auxiliary equipment and facilities, based on the distributing of buildings and the demand of users production, living and fire-fighting demands.2.0.2 Drainage systemA network timely draining rain and waste and polluted water produced in daily life and production, through pipelines and auxiliary equipment and facilities.2.0.3 Hot water supply systemA network consisting of pipelines and auxiliary equipment and facilities for the purpose of transmitting hot water, so as to meet peoples specific requirements for water temperature in daily life and production.2.0.4 Sanitary fixturesThe equipment used to meet a variety of sanitary needs in peoples daily life and to collect and discharge sewage and industrial waste water.2.0.5 Water supply fittingsA general term of a variety of pipe fittings, valves and water faucets that are used in the water (including hot water) supply system to adjust and distribute the volume and pressure of water and cut off and change the flow of water.2.0.6 Intermediate water system of buildingA term refers to all the water supply systems that utilize the cooling water and daily-life drain from bathing and washing as the source, which, after going through physical and chemical treatment, will be used in toilets and for gardening and planting, washing cars, road watering, cooling of air-conditioners and sightseeing water facilities.2.0.7 AuxiliariesAll of the equipment in the water supply and drainage and heating systems of buildings that are established for the purpose of satisfying various use functions of users and improving the operating quality.2.0.8 Test pressureRefers to the value of pressure that the pipeline, vessel or equipment is required to reach in a compression strength or gas-tight test.2.0.9 Rated working pressureRefers to the maximum permissible operating pressure of a boiler or pressure vessel as designated by the manufacturer.2.0.10 Pipe fittingsA general term describing a variety of parts and accessories used for the connection among pipes or pipes and equipment. 2.0.11 Fixed trestleRefers to a kind of pipe trestle used to prevent the pipe it support from both radial and axial displacement at the supporting point.2.0.12 Movable trestleRefers to a kind of pipe trestle that allows the pipe it supports to move along the axial direction.2.0.13 Integrative boilerA kind of boiler which is delivered after the final assembly is completed in the plant based on the permissible conditions for transportation.2.0.14 Boiler without bearingA kind of fixed boiler which utilizes water as the medium, stipulates a water level for the boiler body that is directly contacting air during operation, and always maintains its working pressure at the value of air pressure.2.0.15 Safety accessoryAll auxiliary meters, valves and control devices that are necessary for ensuring the safe operation of boilers and pressure vessels.2.0.16 Still equipmentAny equipment in a system that itself will not moves during the systems operation, including water tanks and other tanks and containers.2.0.17 Household-based heat meteringThe metering mode under which the volume of heat provided is measured based on every household.2.0.18 Heat metering deviceA set of meters and devices measuring the transfer volume of heat medium.2.0.19 Compression jointA kind of joining mode under which special joints comprising cap nuts and screw thread pipe fittings are used for the connection among pipes.2.0.20 Fire-resisting sleevesRefers to a kind of short tube that is made of refractory materials and flame retardant and covered the outside wall of stiff-plastic drainage pipes, for the purpose of preventing the fame from spreading along the pipe.2.0.21 Firestops collarA kind of collar that is made of fire retardant expansive agent and used to cover the outside wall of stiff-plastic drainage pipes, so as to prevent the fire from spreading because its function of blocking the pipes at the occurrence of fire accidents.3 Basic Regulations3.1 Quality Management3.1.1 All and every site of water supply and drainage and heating works of buildings must have necessary technical standards for construction, an optimized and healthful quality management system and the mechanism for quality inspection, so as to perform an overall process of quality control.3.1.2 The construction of buildings water supply and drainage and heating works shall be executed in accordance with the approved engineering design documents and technical standards for construction. Any modification or change of designs shall be subject to the change notice issued by the design organization.3.1.3 Prior toe the beginning of construction, a design or construction scheme of the construction organization shall be prepared and approved.3.1.4 The classification of partitioned and divisional works of buildings water supply and drainage and heating works is detailed in Schedule A.3.1.5 The divisional works of buildings water supply and drainage and heating works shall be divided in accordance with the system, area, construction section or floor. Acceptance of divisional works shall be carried out based on different inspection lots.3.1.6 Any unit undertaking the construction of water supply and drainage and heating works of buildings shall have corresponding qualification, with its quality inspector having relevant professional technical qualification.3.2 Management of Equipment and Material3.2.1 All key materials, finished and semi-finished products, accessories and parts, apparatus and equipment used in water supply and drainage and heating works of buildings must be delivered together with the Chinese quality certificates of conformity. Any specification, model and performance inspection reports thereof shall comply with relevant national standards or the design requirements. Before delivering into the construction site, they shall be inspected for acceptance and confirmed by the supervision and management engineer.3.2.2 Inspection and acceptance shall be made for all materials in terms of the variety, specification and appearance. The packaging shall be in good condition, without any scratch on the surface and damage and breakage caused by external force.3.2.3 Installation and operation instructions shall be provided for key devices, apparatus and equipment. Effective measures shall be taken to prevent possible damage and losses or corrosion in the course of transportation, keeping and construction.3.2.4 Prior to the installation of valves, strength and gas-tight tests shall be carried out. Such tests shall cover 10% of every batch of valves (with the same designation, model and specification), which shall at least be one valve. For those trip and stop valves installed on main and arterial pipes, the strength and gas-tight tests shall be carried out for every such valves.3.2.5 The strength and gas-tight tests of valves shall meet the following requirements: the strength test pressure shall be 1.5 times of the nominal value; the gas-tight test pressure shall be 1.1 times of the nominal value; the test pressure shall stay unchanged in the duration of test, and no leakage shall be found in the shell filling and on the valve clacks sealing surface. The duration of the valve pressure test shall at least meet the stipulations in Table 3.2.5.Table 3.2.5 Duration of valve testNominal diameter DN (mm0Minimum duration of test (s)Gas-tight testStrength testMetal sealingNon-metal sealing5015151565-200301560250-45060301803.2.6 If a stamping elbow is used on the pipe, the elbows outside diameter shall be equivalent to that of the pipe.3.3 Quality Control of Construction Process3.3.1 Between the water supply and drainage and heating works of buildings and related special fields, hand-over quality inspection shall be made, together with related records.3.3.2 Any conceal work can be concealed only after the acceptance and approval by related parties, and records thereof shall be made.3.3.3 Any basement or sub-structure with its exterior wall passed through by pipes must have waterproof measures. As regard the building that has strict waterproof requirements, flexible water strings must be used for the pipes.3.3.4 In the event that the pipe is pass through the expansion, aseismatic and/or settlement joint, any or all of the following protective measures shall be taken based on actual conditions:1 Flexible connection taken at each side of the wall.2 Leave a clearance of at least 150mm above and below the outside surface of the pipe or insulating layer.3 Made into a square compensator at the passing point and install it horizontally.3.3.5 All heating equipment, sanitary ware and pipe fittings of the same type in the same room shall be installed at the same height, unless otherwise specially required.3.3.6 When open pipes are installed in rows, the straight line section shall be parallel. As regards the curve sections: when the pipes are parallel horizontally or vertically, they shall remain the same spacing; when the pipes are parallel horizontally and at different heights, the radius of curvature of the curve sections shall remain the same.3.3.7 The installation of the pipes trestle, hanger and bracket shall comply with the following stipulations hereunder:1 The position is correct, and the laying shall be flat and solid.2 The fixed trestle shall tightly contact the pipe and fixed solidly.3 The movable trestle shall be flexible, with a 35mm clearance remaining between the support and slideway, and the longitudinal amount of movement shall meet the design requirements.4 All hangers and suspension rods without thermal elongation shall be installed vertically.5 Any hanger and suspension rod with thermal elongation shall be offset in the reverse direction.6 The trestles and hangers fixed on the structure must not affect the structures safety.3.3.8 The spacing among the trestles and hangers of horizontally installed steel pipes shall not exceed the stipulations in Table 3.3.8.Table 3.3.8 Maximum spacing between trestles of steel pipesNominal diameter (mm)1520253240507080100125150200250300Max. trestle spacing (m)Insulated pipe22.52.52.533444.567788.5Non-insulated pipe2.533.544.55666.5789.511123.3.9 The spacing between the trestles for plastic and clad pipes used in the heating, water and hot water suppl