Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative.
This code is revised from GB 50261-2005 Code for Installation and Commissioning of Sprinkler Systems by the drafting group through extensive investigation, careful summarization of practical experience and widely solicitation for opinions according to the requirements of "Notice on Printing and Distributing the 'Development and Revision Plan of National Engineering Construction Standards and Codes (First Batch) in 2008'" (JIANBIAO [2008] No. 102) issued by the Ministry of Housing and Urban-Rural Development.
Main technical contents of this code include: general provisions, terms, basic requirements, installation and construction of water supply facilities, installation of pipeline network and system components, system pressure testing and flush washing, system commissioning, system acceptance, maintenance and management as well as relevant annexes.
Main revised contents are as follows:
1. English contents are added;
2. Installation requirements for early suppression fast response sprinkler (ESFR) are added;
3. Installation requirements for copper pipe, stainless steel pipe, coating steel pipe, chlorinated polyvinyl chloride (PVC-C) pipe and flexible sprinkler hose are added;
4. The arrangement requirements for flow rate and pressure detection device are revised;
5. Requirements for water filling time of dry-type and pre-action system are revised;
6. The tables in normative annexes are revised to provide stronger operability;
7. Contents of inspection method for maintenance and management are added;
8. Some clauses inconvenient for operation are revised;
9. The former 3.1.2 is cancelled, and the compulsory provisions in the former 8.0.13 are changed to non-compulsory ones;
10. Relationship with other codes and standards are coordinated.
In this code, the provisions printed in bold type are compulsory ones and must be enforced strictly.
The Ministry of Housing and Urban-Rural Development is in charge of the administration of this code and the explanation of the compulsory provisions in this code, the Ministry of Public Security is responsible for routine management, and Sichuan Fire Research Institute of the Ministry of Public Security is responsible for the explanation of specific technical contents. In case of any comment or suggestion during the process of implementing this code, please send it to the Code for Installation and Commissioning of Sprinkler Systems Management Group of Sichuan Fire Research Institute of the Ministry of Public Security (address: No. 69 Jinke South Road, Jinniu District, Chengdu, Sichuan; 610036) for future reference in revision.
Contents
Foreword i
1 General Provisions 4
2 Terms 4
3 Basic Requirements 5
3.1 Quality Management 5
3.2 Material and Equipment Management 6
4 Installation and Construction of Water Supply Facilities 10
4.1 General Requirements 10
4.2 Installation of Fire Pump 11
4.3 Installation of Fire Tank and Construction of Fire Reservoir 12
4.4 Installation of Pressure Fire Water Supply Equipment and Pressure Maintenance Pump 14
4.5 Installation of Fire Pump Adapter 15
5 Installation of Pipeline Network and System Components 17
5.1 Installation of Pipeline Network 17
5.2 Installation of Sprinklers 27
5.3 Installation of Alarm Valve Set 34
5.4 Installation of Other System Components 37
6 System Pressure Testing and Flush Washing 43
6.1 General Requirements 43
6.2 Water Pressure Testing 45
6.3 Gas Pressure Testing 47
6.4 Flush Washing 47
7 System Commissioning 48
7.1 General Requirements 48
7.2 Contents and Requirements 49
8 System Acceptance 52
9 Maintenance 59
Annex A Classification for Subprojects and Subunits of Sprinkler Systems 64
Annex B Construction Site Quality Management Inspection Records 65
Annex C Quality Inspection Records for Sprinkler Systems Installation Process 66
Annex D Inspection Records for Quality Control Documentation of Sprinkler Systems 70
Annex E Records of Acceptance for Sprinkler System Project 71
Annex F Classification for Deficiencies in Sprinkler System Acceptance 75
Annex G Inspection Items for Maintenance and Supervision of Sprinkler Systems 76
Explanation of Wording in This Code 77
List of Quoted Standards 78
Code for Installation and Commissioning of Sprinkler Systems
1 General Provisions
1.0.1 This code is formulated with view to ensuring the construction quality and use function of sprinkler system (hereinafter referred to as system), reducing fire hazard and protecting personal and property safety.
1.0.2 This code is applicable to the construction, acceptance, maintenance and management of sprinkler system arranged in industrial and civil buildings.
1.0.3 The construction, acceptance, maintenance and management of sprinkler system shall not only meet those specified in this code, shall also comply with the requirements of relevant national current standards and codes.
2 Terms
2.0.1 condition of standing by
the state with the performance and service condition of sprinkler system complying with relevant technical requirements and enabling immediate action and sprinkling in case of fire
2.0.2 system components
a general term for special products such as sprinkler, alarm valve set, pressure switch, water flow indicator, fire pump and pressure maintenance device
2.0.3 equipment for supervisory and alarm control services
the equipment supervising the pressure, water level, water flow and valve opening/closing state of sprinkler system and capable of sending out control signal and alarm signal
2.0.4 pressure maintenance pumps
a kind of special pump maintaining the pressure of sprinkler system under the condition of standing by within the range of design working pressure
2.0.5 sprinkler guards and shields
special guards and shields preventing the sprinkler from mechanical damage but free of effect on sprinkler action and extinguishing performance
2.0.6 inspector’s test connection
the equipment installed at the end of system pipeline network or area pipeline network, inspecting such functions as system start, alarm and linkage
2.0.7 fire pump
the pump complying with the relevant requirements of the current national standard GB 6245 Fire Pumps
3 Basic Requirements
3.1 Quality Management
3.1.1 The subproject and subunit of sprinkler system shall be classified according to Annex A.
3.1.2 Construction scheme for system construction shall be prepared according to the design requirements. Necessary technical standard for construction, sound construction quality management system and work quality inspection system shall be provided on construction site, and relevant records shall be filled in according to the requirements of Annex B.
3.1.3 The following conditions shall be provided prior to sprinkler system construction:
1 The construction drawing shall be examined and approved or recorded before construction. Drawings such as plan drawing, system drawing (axonometric drawing and schematic diagram of development system) and detail drawing for construction as well as technical documents such as instructions, equipment list, material and equipment list shall be complete.
2 The design organization shall make technical disclosure to the construction, development and supervision organizations.
3 The system components and pipe fittings as well as other equipment and materials shall be able to ensure the normal construction.
4 The construction site and the water, electricity and gas used during construction shall meet the construction requirements and shall ensure continuous construction.
3.1.4 The construction of sprinkler system project shall be in accordance with the approved project design documents and technical standard for construction.
3.1.5 The construction process quality control of sprinkler system project shall be carried out in accordance with the following requirements:
1 As for the procedures, quality control shall be carried out according to technical standard for construction. After completion of each procedure, inspection shall be carried out, and the next procedure may be started only after passing such inspection.
2 Handing-over inspection shall be carried out among work types of various systems and the next procedure may be started only after being certificated by the supervising engineer.
3 After the installation project is completed, commissioning shall be carried out by the construction organization according to the requirements of relevant system.
4 After the commissioning is completed, the construction organization shall provide quality control data and various quality inspection records of construction process to the development organization.
5 The quality inspection organization of construction process shall be composed of construction organization staff under the organization of the supervising engineer.
6 The quality inspection record of construction process shall be filled in according to the requirements of Annex C.
3.1.6 The quality control data of sprinkler system shall be filled in according to the requirements of Annex D.
3.1.7 Prior to sprinkler system construction, site inspection shall be carried out for system components, pipe fittings and other equipment and materials, and those rejected shall not be used.
3.1.8 The quality acceptance of subproject shall be carried out by the construction organization project principal, supervising engineer and the design organization project principal under the organization of development organization principal, and records of acceptance for sprinkler system project shall be filled in according to Annex E.
3.2 Material and Equipment Management
3.2.1 Prior to sprinkler system construction, site inspection shall be carried out for the adopted system components, pipe fittings and other equipment and materials, and the following requirements shall be met:
1 System components, pipe fittings and other equipment and materials shall meet the design requirements and the requirements of relevant current national standards and shall be provided with the end-of-manufacturing certificate or quality certification.
Inspection quantity: 100% inspection.
Inspection method: inspecting relevant data.
2 Main components of system such as sprinkler, alarm valve set, pressure switch, water flow indicator, fire pump and pump adapter shall pass the testing by the National Quality Supervision and Inspection Center of Fire Products; the pressure maintenance pump, automatic exhaust valve, signal valve, multi-function pump control valve, check valve, relief valve, reducing valve, butterfly valve, gate valve, pressure gauge, etc. shall pass the testing of corresponding national product quality supervision and inspection center.
Inspection quantity: 100% inspection.
Inspection method: inspecting relevant data.
3.2.2 Galvanized steel pipes and pipe fittings shall be subject to site appearance inspection, and shall meet the following requirements:
1 The galvanized steel pipe shall be hot-dip galvanized on both internal and external walls, and the galvanized layer on internal and external surfaces of steel pipe shall be free from phenomena like shedding and corrosion; both inside and outside diameters of steel pipe shall meet the requirements of the current national standard GB/ T 3091 Welded Steel Pipes for Low Pressure Liquid Delivery or GB/T 8163 Seamless Steel Tubes for Liquid Service.
2 The surface shall be free from crack, shrinkage cavity, slag inclusion, fold and double skin.
3 The sealing face of thread shall be complete and free from damage and burr.
4 The non-metallic sealing gasket shall have flexible texture, and be free from aging deterioration or layering, and its surface shall be free from defects like depreciation and wrinkle.
5 The flange sealing face shall be complete, smooth and clean and shall be free from burrs and radial groove; the thread of threaded flange shall be complete without damage.
Inspection quantity: 100% inspection.
Inspection method: observing and inspecting with ruler.
3.2.3 Stainless steel pipes and pipe fittings shall be subject to site appearance inspection, and shall meet the following requirements:
1 Both the inside and outside diameters of stainless steel pipe shall meet the requirements of the current national standard GB/T 12771 Welded Stainless Steel Pipes for Liquid Delivery or GB/T 19228.2 Stainless Steel Press-fitting Assemblies - Part 2: Light Gauge Stainless Steel Tubes for Press-fittings.
2 The surface shall be free of crack and damage.
Inspection quantity: 100% inspection.
Inspection method: observing and inspecting with ruler.
3.2.4 Copper pipes and pipe fittings shall be subject to site appearance inspection, and shall meet the following requirements:
1 The quality of copper pipes and pipe fittings shall meet the requirements of the current national standards GB/T 18033 Seamless Copper Tubes for Water and Gas, GB/T 11618.1 Pipe Fittings of Copper and Copper Alloys - Part 1: Fittings of Braze Welding Type and GB/T 11618.2 Pipe Fittings of Copper and Copper Alloys - Part 2: Fittings of Press Type.
2 The surface shall be free of crack and damage.
Inspection quantity: 100% inspection.
Inspection method: observing and inspecting with ruler.
3.2.5 Coating steel pipes and pipe fittings shall be subject to site appearance inspection, and shall meet the following requirements:
1 The quality of coating steel pipes and pipe fittings shall meet the requirements of the current national standard GB 5135.20 Automatic Sprinkler System - Part 20: Coating Steel Pipe.
2 The surface shall be free of crack and damage.
Inspection quantity: 100% inspection.
Inspection method: observing and inspecting with ruler.
3.2.6 Chlorinated polyvinyl chloride (PVC-C) pipes and pipe fittings shall be subject to site appearance inspection, and shall meet the following requirements:
1 Chlorinated polyvinyl chloride shall meet the requirements of the current national standard GB 5135.19 Automatic Sprinkler System - Part 19: Plastic Pipe and Fittings.
2 Both internal and external surfaces of pipe shall be smooth, flat, and free from indentation, decomposition discoloration line, uneven color, other surface defect affecting the performance and visible impurity.
3 Pipe end shall be cut flatly and vertical to the axis.
4 Both internal and external surfaces of pipe fittings shall be free from crack, bubble, peeling, severe cold spot and visible impurity.
5 Pipes and pipe fittings shall be light-tight.
Inspection quantity: 100% inspection.
Inspection method: observing and inspecting with ruler.
3.2.7 Site inspection of sprinkler must comply with the following requirements:
1 Marks such as the trademark, type, nominal operating temperature, response time index (RTI), manufacturer and production date of sprinkler shall be complete.
2 Type, specification, etc. of sprinkler shall meet the design requirements.
3 The sprinkler appearance shall be free of processing defect and mechanical damage.
4 The sealing face of sprinkler thread shall be free from scar, burr, wire shortage or break.
5 Close-type sprinkler shall be subject to sealing performance test, and that without leakage and damage shall be regarded as acceptable.
Test quantity shall be 1% from each batch through random sampling, and shall not be less than 5; the test pressure shall be 3.0MPa, and the pressure holding time shall not be less than 3min. Where two or more pieces are rejected, sprinklers of this batch cannot be used. Where there is only one piece rejected, 2% (not less than 10 pieces) shall be randomly taken for sealing performance test; if there are still rejected ones, sprinklers of this batch shall not be used.
Inspection quantity: complying with Item 5 of this clause.
Inspection method: observing and testing on special test device; the main testing equipment includes pressure test pump, pressure gauge and stopwatch.
3.2.8 Site inspection of valve and its accessories shall meet the following requirements:
1 The marks like trademark, type and specification of valve shall be complete, and the type and specification of valve shall meet the design requirements.
2 The valve and its accessories shall be complete and free from processing defect and mechanical damage.
3 In addition to such marks as trademark, type and specification, the alarm valve shall also be provided with permanent mark of flow direction.
4 The disc and operating mechanism of alarm valve and control valve shall be in flexible operation without jam, and the valve body shall be clean without blocking by foreign matters.
5 The hydraulic alarm bell clapper shall be in flexible rotation without blocking; the drive shaft shall have favorable sealing performance and free of water leakage.
6 The alarm valve shall be subject to leakage test, of which, the test pressure shall be two times of the rated working pressure, the pressure holding time shall not be less than 5min, and the disc shall be free from leakage.
Inspection quantity: 100% inspection.
Inspection method: observing and testing on special test device; the main testing equipment includes pressure test pump, pressure gauge and stopwatch.
3.2.9 Automatic monitoring devices such as pressure switch, flow detector, automatic exhaust valve, reducing valve, relief valve, multi-function pump control valve, check valve, signal valve, pump adapter as well as water level, air pressure and valve limiter shall be provided with clear nameplate, indication sign of safety operation and product instruction; permanent marks indicating flow direction shall be equipped on flow detector, pump adapter, reducing valve, check valve, filter, relief valve and multi-function pump control valve; main functions shall be inspected before installation.
Inspection quantity: 100% inspection.
Inspection method: observing and testing on special test device; the main testing equipment includes pressure test pump, pressure gauge and stopwatch.
Foreword i
1 General Provisions
2 Terms
3 Basic Requirements
3.1 Quality Management
3.2 Material and Equipment Management
4 Installation and Construction of Water Supply Facilities
4.1 General Requirements
4.2 Installation of Fire Pump
4.3 Installation of Fire Tank and Construction of Fire Reservoir
4.4 Installation of Pressure Fire Water Supply Equipment and Pressure Maintenance Pump
4.5 Installation of Fire Pump Adapter
5 Installation of Pipeline Network and System Components
5.1 Installation of Pipeline Network
5.2 Installation of Sprinklers
5.3 Installation of Alarm Valve Set
5.4 Installation of Other System Components
6 System Pressure Testing and Flush Washing
6.1 General Requirements
6.2 Water Pressure Testing
6.3 Gas Pressure Testing
6.4 Flush Washing
7 System Commissioning
7.1 General Requirements
7.2 Contents and Requirements
8 System Acceptance
9 Maintenance
Annex A Classification for Subprojects and Subunits of Sprinkler Systems
Annex B Construction Site Quality Management Inspection Records
Annex C Quality Inspection Records for Sprinkler Systems Installation Process
Annex D Inspection Records for Quality Control Documentation of Sprinkler Systems
Annex E Records of Acceptance for Sprinkler System Project
Annex F Classification for Deficiencies in Sprinkler System Acceptance
Annex G Inspection Items for Maintenance and Supervision of Sprinkler Systems
Explanation of Wording in This Code
List of Quoted Standards
Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative.
This code is revised from GB 50261-2005 Code for Installation and Commissioning of Sprinkler Systems by the drafting group through extensive investigation, careful summarization of practical experience and widely solicitation for opinions according to the requirements of "Notice on Printing and Distributing the 'Development and Revision Plan of National Engineering Construction Standards and Codes (First Batch) in 2008'" (JIANBIAO [2008] No. 102) issued by the Ministry of Housing and Urban-Rural Development.
Main technical contents of this code include: general provisions, terms, basic requirements, installation and construction of water supply facilities, installation of pipeline network and system components, system pressure testing and flush washing, system commissioning, system acceptance, maintenance and management as well as relevant annexes.
Main revised contents are as follows:
1. English contents are added;
2. Installation requirements for early suppression fast response sprinkler (ESFR) are added;
3. Installation requirements for copper pipe, stainless steel pipe, coating steel pipe, chlorinated polyvinyl chloride (PVC-C) pipe and flexible sprinkler hose are added;
4. The arrangement requirements for flow rate and pressure detection device are revised;
5. Requirements for water filling time of dry-type and pre-action system are revised;
6. The tables in normative annexes are revised to provide stronger operability;
7. Contents of inspection method for maintenance and management are added;
8. Some clauses inconvenient for operation are revised;
9. The former 3.1.2 is cancelled, and the compulsory provisions in the former 8.0.13 are changed to non-compulsory ones;
10. Relationship with other codes and standards are coordinated.
In this code, the provisions printed in bold type are compulsory ones and must be enforced strictly.
The Ministry of Housing and Urban-Rural Development is in charge of the administration of this code and the explanation of the compulsory provisions in this code, the Ministry of Public Security is responsible for routine management, and Sichuan Fire Research Institute of the Ministry of Public Security is responsible for the explanation of specific technical contents. In case of any comment or suggestion during the process of implementing this code, please send it to the Code for Installation and Commissioning of Sprinkler Systems Management Group of Sichuan Fire Research Institute of the Ministry of Public Security (address: No. 69 Jinke South Road, Jinniu District, Chengdu, Sichuan; 610036) for future reference in revision.
Contents
Foreword i
1 General Provisions 4
2 Terms 4
3 Basic Requirements 5
3.1 Quality Management 5
3.2 Material and Equipment Management 6
4 Installation and Construction of Water Supply Facilities 10
4.1 General Requirements 10
4.2 Installation of Fire Pump 11
4.3 Installation of Fire Tank and Construction of Fire Reservoir 12
4.4 Installation of Pressure Fire Water Supply Equipment and Pressure Maintenance Pump 14
4.5 Installation of Fire Pump Adapter 15
5 Installation of Pipeline Network and System Components 17
5.1 Installation of Pipeline Network 17
5.2 Installation of Sprinklers 27
5.3 Installation of Alarm Valve Set 34
5.4 Installation of Other System Components 37
6 System Pressure Testing and Flush Washing 43
6.1 General Requirements 43
6.2 Water Pressure Testing 45
6.3 Gas Pressure Testing 47
6.4 Flush Washing 47
7 System Commissioning 48
7.1 General Requirements 48
7.2 Contents and Requirements 49
8 System Acceptance 52
9 Maintenance 59
Annex A Classification for Subprojects and Subunits of Sprinkler Systems 64
Annex B Construction Site Quality Management Inspection Records 65
Annex C Quality Inspection Records for Sprinkler Systems Installation Process 66
Annex D Inspection Records for Quality Control Documentation of Sprinkler Systems 70
Annex E Records of Acceptance for Sprinkler System Project 71
Annex F Classification for Deficiencies in Sprinkler System Acceptance 75
Annex G Inspection Items for Maintenance and Supervision of Sprinkler Systems 76
Explanation of Wording in This Code 77
List of Quoted Standards 78
Code for Installation and Commissioning of Sprinkler Systems
1 General Provisions
1.0.1 This code is formulated with view to ensuring the construction quality and use function of sprinkler system (hereinafter referred to as system), reducing fire hazard and protecting personal and property safety.
1.0.2 This code is applicable to the construction, acceptance, maintenance and management of sprinkler system arranged in industrial and civil buildings.
1.0.3 The construction, acceptance, maintenance and management of sprinkler system shall not only meet those specified in this code, shall also comply with the requirements of relevant national current standards and codes.
2 Terms
2.0.1 condition of standing by
the state with the performance and service condition of sprinkler system complying with relevant technical requirements and enabling immediate action and sprinkling in case of fire
2.0.2 system components
a general term for special products such as sprinkler, alarm valve set, pressure switch, water flow indicator, fire pump and pressure maintenance device
2.0.3 equipment for supervisory and alarm control services
the equipment supervising the pressure, water level, water flow and valve opening/closing state of sprinkler system and capable of sending out control signal and alarm signal
2.0.4 pressure maintenance pumps
a kind of special pump maintaining the pressure of sprinkler system under the condition of standing by within the range of design working pressure
2.0.5 sprinkler guards and shields
special guards and shields preventing the sprinkler from mechanical damage but free of effect on sprinkler action and extinguishing performance
2.0.6 inspector’s test connection
the equipment installed at the end of system pipeline network or area pipeline network, inspecting such functions as system start, alarm and linkage
2.0.7 fire pump
the pump complying with the relevant requirements of the current national standard GB 6245 Fire Pumps
3 Basic Requirements
3.1 Quality Management
3.1.1 The subproject and subunit of sprinkler system shall be classified according to Annex A.
3.1.2 Construction scheme for system construction shall be prepared according to the design requirements. Necessary technical standard for construction, sound construction quality management system and work quality inspection system shall be provided on construction site, and relevant records shall be filled in according to the requirements of Annex B.
3.1.3 The following conditions shall be provided prior to sprinkler system construction:
1 The construction drawing shall be examined and approved or recorded before construction. Drawings such as plan drawing, system drawing (axonometric drawing and schematic diagram of development system) and detail drawing for construction as well as technical documents such as instructions, equipment list, material and equipment list shall be complete.
2 The design organization shall make technical disclosure to the construction, development and supervision organizations.
3 The system components and pipe fittings as well as other equipment and materials shall be able to ensure the normal construction.
4 The construction site and the water, electricity and gas used during construction shall meet the construction requirements and shall ensure continuous construction.
3.1.4 The construction of sprinkler system project shall be in accordance with the approved project design documents and technical standard for construction.
3.1.5 The construction process quality control of sprinkler system project shall be carried out in accordance with the following requirements:
1 As for the procedures, quality control shall be carried out according to technical standard for construction. After completion of each procedure, inspection shall be carried out, and the next procedure may be started only after passing such inspection.
2 Handing-over inspection shall be carried out among work types of various systems and the next procedure may be started only after being certificated by the supervising engineer.
3 After the installation project is completed, commissioning shall be carried out by the construction organization according to the requirements of relevant system.
4 After the commissioning is completed, the construction organization shall provide quality control data and various quality inspection records of construction process to the development organization.
5 The quality inspection organization of construction process shall be composed of construction organization staff under the organization of the supervising engineer.
6 The quality inspection record of construction process shall be filled in according to the requirements of Annex C.
3.1.6 The quality control data of sprinkler system shall be filled in according to the requirements of Annex D.
3.1.7 Prior to sprinkler system construction, site inspection shall be carried out for system components, pipe fittings and other equipment and materials, and those rejected shall not be used.
3.1.8 The quality acceptance of subproject shall be carried out by the construction organization project principal, supervising engineer and the design organization project principal under the organization of development organization principal, and records of acceptance for sprinkler system project shall be filled in according to Annex E.
3.2 Material and Equipment Management
3.2.1 Prior to sprinkler system construction, site inspection shall be carried out for the adopted system components, pipe fittings and other equipment and materials, and the following requirements shall be met:
1 System components, pipe fittings and other equipment and materials shall meet the design requirements and the requirements of relevant current national standards and shall be provided with the end-of-manufacturing certificate or quality certification.
Inspection quantity: 100% inspection.
Inspection method: inspecting relevant data.
2 Main components of system such as sprinkler, alarm valve set, pressure switch, water flow indicator, fire pump and pump adapter shall pass the testing by the National Quality Supervision and Inspection Center of Fire Products; the pressure maintenance pump, automatic exhaust valve, signal valve, multi-function pump control valve, check valve, relief valve, reducing valve, butterfly valve, gate valve, pressure gauge, etc. shall pass the testing of corresponding national product quality supervision and inspection center.
Inspection quantity: 100% inspection.
Inspection method: inspecting relevant data.
3.2.2 Galvanized steel pipes and pipe fittings shall be subject to site appearance inspection, and shall meet the following requirements:
1 The galvanized steel pipe shall be hot-dip galvanized on both internal and external walls, and the galvanized layer on internal and external surfaces of steel pipe shall be free from phenomena like shedding and corrosion; both inside and outside diameters of steel pipe shall meet the requirements of the current national standard GB/ T 3091 Welded Steel Pipes for Low Pressure Liquid Delivery or GB/T 8163 Seamless Steel Tubes for Liquid Service.
2 The surface shall be free from crack, shrinkage cavity, slag inclusion, fold and double skin.
3 The sealing face of thread shall be complete and free from damage and burr.
4 The non-metallic sealing gasket shall have flexible texture, and be free from aging deterioration or layering, and its surface shall be free from defects like depreciation and wrinkle.
5 The flange sealing face shall be complete, smooth and clean and shall be free from burrs and radial groove; the thread of threaded flange shall be complete without damage.
Inspection quantity: 100% inspection.
Inspection method: observing and inspecting with ruler.
3.2.3 Stainless steel pipes and pipe fittings shall be subject to site appearance inspection, and shall meet the following requirements:
1 Both the inside and outside diameters of stainless steel pipe shall meet the requirements of the current national standard GB/T 12771 Welded Stainless Steel Pipes for Liquid Delivery or GB/T 19228.2 Stainless Steel Press-fitting Assemblies - Part 2: Light Gauge Stainless Steel Tubes for Press-fittings.
2 The surface shall be free of crack and damage.
Inspection quantity: 100% inspection.
Inspection method: observing and inspecting with ruler.
3.2.4 Copper pipes and pipe fittings shall be subject to site appearance inspection, and shall meet the following requirements:
1 The quality of copper pipes and pipe fittings shall meet the requirements of the current national standards GB/T 18033 Seamless Copper Tubes for Water and Gas, GB/T 11618.1 Pipe Fittings of Copper and Copper Alloys - Part 1: Fittings of Braze Welding Type and GB/T 11618.2 Pipe Fittings of Copper and Copper Alloys - Part 2: Fittings of Press Type.
2 The surface shall be free of crack and damage.
Inspection quantity: 100% inspection.
Inspection method: observing and inspecting with ruler.
3.2.5 Coating steel pipes and pipe fittings shall be subject to site appearance inspection, and shall meet the following requirements:
1 The quality of coating steel pipes and pipe fittings shall meet the requirements of the current national standard GB 5135.20 Automatic Sprinkler System - Part 20: Coating Steel Pipe.
2 The surface shall be free of crack and damage.
Inspection quantity: 100% inspection.
Inspection method: observing and inspecting with ruler.
3.2.6 Chlorinated polyvinyl chloride (PVC-C) pipes and pipe fittings shall be subject to site appearance inspection, and shall meet the following requirements:
1 Chlorinated polyvinyl chloride shall meet the requirements of the current national standard GB 5135.19 Automatic Sprinkler System - Part 19: Plastic Pipe and Fittings.
2 Both internal and external surfaces of pipe shall be smooth, flat, and free from indentation, decomposition discoloration line, uneven color, other surface defect affecting the performance and visible impurity.
3 Pipe end shall be cut flatly and vertical to the axis.
4 Both internal and external surfaces of pipe fittings shall be free from crack, bubble, peeling, severe cold spot and visible impurity.
5 Pipes and pipe fittings shall be light-tight.
Inspection quantity: 100% inspection.
Inspection method: observing and inspecting with ruler.
3.2.7 Site inspection of sprinkler must comply with the following requirements:
1 Marks such as the trademark, type, nominal operating temperature, response time index (RTI), manufacturer and production date of sprinkler shall be complete.
2 Type, specification, etc. of sprinkler shall meet the design requirements.
3 The sprinkler appearance shall be free of processing defect and mechanical damage.
4 The sealing face of sprinkler thread shall be free from scar, burr, wire shortage or break.
5 Close-type sprinkler shall be subject to sealing performance test, and that without leakage and damage shall be regarded as acceptable.
Test quantity shall be 1% from each batch through random sampling, and shall not be less than 5; the test pressure shall be 3.0MPa, and the pressure holding time shall not be less than 3min. Where two or more pieces are rejected, sprinklers of this batch cannot be used. Where there is only one piece rejected, 2% (not less than 10 pieces) shall be randomly taken for sealing performance test; if there are still rejected ones, sprinklers of this batch shall not be used.
Inspection quantity: complying with Item 5 of this clause.
Inspection method: observing and testing on special test device; the main testing equipment includes pressure test pump, pressure gauge and stopwatch.
3.2.8 Site inspection of valve and its accessories shall meet the following requirements:
1 The marks like trademark, type and specification of valve shall be complete, and the type and specification of valve shall meet the design requirements.
2 The valve and its accessories shall be complete and free from processing defect and mechanical damage.
3 In addition to such marks as trademark, type and specification, the alarm valve shall also be provided with permanent mark of flow direction.
4 The disc and operating mechanism of alarm valve and control valve shall be in flexible operation without jam, and the valve body shall be clean without blocking by foreign matters.
5 The hydraulic alarm bell clapper shall be in flexible rotation without blocking; the drive shaft shall have favorable sealing performance and free of water leakage.
6 The alarm valve shall be subject to leakage test, of which, the test pressure shall be two times of the rated working pressure, the pressure holding time shall not be less than 5min, and the disc shall be free from leakage.
Inspection quantity: 100% inspection.
Inspection method: observing and testing on special test device; the main testing equipment includes pressure test pump, pressure gauge and stopwatch.
3.2.9 Automatic monitoring devices such as pressure switch, flow detector, automatic exhaust valve, reducing valve, relief valve, multi-function pump control valve, check valve, signal valve, pump adapter as well as water level, air pressure and valve limiter shall be provided with clear nameplate, indication sign of safety operation and product instruction; permanent marks indicating flow direction shall be equipped on flow detector, pump adapter, reducing valve, check valve, filter, relief valve and multi-function pump control valve; main functions shall be inspected before installation.
Inspection quantity: 100% inspection.
Inspection method: observing and testing on special test device; the main testing equipment includes pressure test pump, pressure gauge and stopwatch.
Contents of GB 50261-2017
Foreword i
1 General Provisions
2 Terms
3 Basic Requirements
3.1 Quality Management
3.2 Material and Equipment Management
4 Installation and Construction of Water Supply Facilities
4.1 General Requirements
4.2 Installation of Fire Pump
4.3 Installation of Fire Tank and Construction of Fire Reservoir
4.4 Installation of Pressure Fire Water Supply Equipment and Pressure Maintenance Pump
4.5 Installation of Fire Pump Adapter
5 Installation of Pipeline Network and System Components
5.1 Installation of Pipeline Network
5.2 Installation of Sprinklers
5.3 Installation of Alarm Valve Set
5.4 Installation of Other System Components
6 System Pressure Testing and Flush Washing
6.1 General Requirements
6.2 Water Pressure Testing
6.3 Gas Pressure Testing
6.4 Flush Washing
7 System Commissioning
7.1 General Requirements
7.2 Contents and Requirements
8 System Acceptance
9 Maintenance
Annex A Classification for Subprojects and Subunits of Sprinkler Systems
Annex B Construction Site Quality Management Inspection Records
Annex C Quality Inspection Records for Sprinkler Systems Installation Process
Annex D Inspection Records for Quality Control Documentation of Sprinkler Systems
Annex E Records of Acceptance for Sprinkler System Project
Annex F Classification for Deficiencies in Sprinkler System Acceptance
Annex G Inspection Items for Maintenance and Supervision of Sprinkler Systems
Explanation of Wording in This Code
List of Quoted Standards
