GB 50738-2011 English PDF

GB 50738-2011: Code for construction of ventilation and air conditioning
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GB 50738-2011
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
UDC
P GB 50738-2011
Code for Construction of Ventilation and Air Conditioning
ISSUED ON: SEPTEMBER 16, 2011
IMPLEMENTED ON: MAY 1, 2012
Issued by: Ministry of Housing and Urban-Rural Construction of the People’s Republic
of China;
General Administration of Quality Supervision, Inspection and Quarantine of
the People’s Republic of China.
Table of Contents
1 General Provisions ...9
2 Terms ...10
3 Basic Requirements ...12
3.1 Construction Technology Management ...12
3.2 Construction Quality Management ...12
3.3 Material and Equipment Quality Management ...13
3.4 Safety and Environmental Protection ...14
4 Metal Duct and Fittings Making ...15
4.1 General Requirements ...15
4.2 Metal Duct Making ...18
4.3 Fittings Making ...26
4.4 Quality Inspection ...27
5 Nonmetallic or Composite Duct and Fittings Making ...29
5.1 General Requirements ...29
5.2 Polyurethane/Phenolic Composite Duct and Fittings Making ...31
5.3 Glass Fiber Composite Duct and Fittings Making ...35
5.4 Glass Fiber/Magnesium Composite Air Duct and Fittings Making ...39
5.5 Rigid Polyvinyl Chloride Air Duct and Fittings Making ...44
5.6 Quality Inspection ...48
6 Air Valve and Components Making ...50
6.1 General Requirements ...50
6.2 Air Valve ...50
6.3 Hood and Cowl ...51
6.4 Air Opening ...51
6.5 Muffler, Air Duct Muffler, Mend Muffler and Muffling Static Pressure Box ...52
6.6 Soft Coupling Duct ...52
6.7 Filter ...53
6.8 Heater in Air Duct ...54
6.9 Quality Inspection ...54
7 Making and Installation of Trestle and Hanger ...57
7.1 General Requirements ...57
7.2 Trestle and Hanger Making ...58
7.3 Trestle and Hanger Installation ...62
7.4 Installation of Fabricated Pipeline Hanger ...67
7.5 Quality Inspection ...67
8 Air Duct and Components Installation...69
8.1 General Requirements ...69
8.2 Metal Duct Installation ...73
8.3 Nonmetallic or Composite Air Duct Installation ...75
8.4 Soft Coupling Air Duct Installation ...77
8.5 Air Opening Installation ...78
8.6 Air Valve Installation ...78
8.7 Installation of Muffler, Static Pressure Box, Filter and Heater in Air Duct ...78
8.8 Quality Inspection ...79
9 Air Handling Equipment Installation ...81
9.1 General Requirements ...81
9.2 Air Conditioning Terminal Device Installation ...82
9.3 Fan Installation ...83
9.4 Air Handling Unit and Heat Recovery Device Installation ...84
9.5 Quality Inspection ...85
10 Cold/Heat Sources and Auxiliary Equipment Installation ...88
10.1 General Requirements ...88
10.2 Steam Compression Refrigeration (Heat Pump) Unit Installation ...89
10.3 Absorption Refrigerating Unit Installation ...91
10.4 Cooling Tower Installation ...92
10.5 Heat Exchanger Installation ...93
10.6 Heat and Cold Storage Equipment Installation ...93
10.7 Soft Water Device Installation ...95
10.8 Water Pump Installation ...95
10.9 Installation of Refrigeration and Heating Accessory Equipment ...96
10.10 Quality Inspection ...97
11 Installation of Pipeline and Accessory of Air Conditioning Water System ...99
11.1 General Requirements ...99
11.2 Pipe Connection ... 101
11.3 Piping Installation ... 105
11.4 Valve and Accessory Installation ... 107
11.5 Quality Inspection ... 109
12 Refrigeration Pipeline and Accessory Installation ... 111
12.1 General Requirements ... 111
12.2 Pipeline Installation ... 111
12.3 Valve and Accessory Installation ... 113
12.4 Quality Inspection ... 113
13 Anticorrosion and Thermal Insulation ... 115
13.1 General Requirements ... 115
13.2 Pipeline and Equipment Anticorrosion ... 116
13.3 Pipeline of Air Conditioning Water System and Equipment Insulation ... 117
13.4 Air Duct System of Air Conditioning and Equipment Insulation ... 119
13.5 Quality Inspection ... 121
14 Monitoring and Control System Installation ... 124
14.1 General Requirements ... 124
14.2 Monitoring Instrument and Equipment Installation ... 124
14.3 Electric Wire Conduit and Wire Groove Installation and Wiring ... 126
14.4 Central Monitoring and Management System Installation ... 127
14.5 Quality Inspection ... 127
15 Inspection and Testing ... 129
15.1 General Requirements ... 129
15.2 Air Duct Strength and Leakage Test ... 130
15.3 Air Duct System Leakage Test ... 132
15.4 Hydrostatic Test of Water System Valve ... 133
15.5 Hydrostatic Test of Water System Pipeline ... 134
Code for Construction of Ventilation and Air Conditioning
1 General Provisions
1.0.1 This code is formulated with view to strengthening the technology management for the
construction and installation of ventilation and air conditioning, standardizing the construction technology,
intensifying the control over construction and installation processes as well as guaranteeing the
engineering quality.
1.0.2 This code is applicable to the construction and installation of ventilation and air conditioning
involved in the building engineering.
1.0.3 During the construction and installation of ventilation and air conditioning, the requirements for
engineering quality in technical engineering documents and contracting documents shall not be lower
than those specified in this code.
1.0.4 The construction of ventilation and air conditioning shall not only meet the requirements stipulated
in this code, but also comply with those in the current relevant ones of the nation.
3 Basic Requirements
3.1 Construction Technology Management
3.1.1 The enterprise which undertake the construction of ventilation and air conditioning shall have
appropriate construction qualification. And appropriate technical standards shall be available for the
construction site.
3.1.2 Where the construction enterprise undertakes the in-depth design of construction drawings of
ventilation and air conditioning, relevant in-depth design documents shall be confirmed by the original
design organization.
3.1.3 Before construction of ventilation and air conditioning, the development organization shall
organize the design, construction and supervision organizations to make technical disclosure and joint
review on the design documents and to confirm them by signing.
3.1.4 Before construction of ventilation and air conditioning, the construction organization shall
prepare the organization design (scheme) for the construction of ventilation and air conditioning which
shall not be implemented until passing the review of its technical principal and obtaining the approval
of the supervision (development) organization. The construction organization shall make technical
disclosure and provide necessary operation instruction and training for the construction personnel of
ventilation and air conditioning.
3.1.5 The change of construction drawings need be approved by the original design organization.
Where the change of construction drawings involves in the using and energy-saving effects of
ventilation and air conditioning, such change shall be subject to review by the censorship of the
original construction drawing design documents. Before any change is made, relevant procedures
shall be handled and confirmation by the supervision and development organizations is required.
3.1.6 Before system check and test as well as operation and commissioning, the construction
organization shall prepare appropriate technical schemes and subject them to review and approval.
3.1.7 The new technology, process, material and equipment used for or applied to ventilation and air
conditioning shall be evaluated, verified and filed according to relevant requirements. Before construction,
special construction technology schemes shall be formulated for new or first-applied construction
technologies.
3.2 Construction Quality Management
3.2.1 Appropriate quality management system shall be established for the construction site of
ventilation and air conditioning and shall cover the following content:
1 Post responsibility system;
2 Technology management responsibility system;
3 Quality management responsibility system;
4 Regular meeting system for engineering quality analysis.
3.2.2 Construction quality control and inspection system shall be established for the construction site
and shall cover the following content:
1 Implementation check system for construction organization design (scheme) and technical
disclosure;
2 Material and equipment receiving inspection system;
3 Construction process control system;
4 Check system for handing-over inspection between relevant processes and intermediate
delivery between professional works;
5 Construction inspection and test system.
3.2.3 Where the pipeline crosses wall and floor slab, sleeve shall be arranged according to the design
requirements, and flame retardant material shall be used between sleeve and pipeline for compact filling;
where the pipeline crosses fire compartment, incombustible material shall be used for fireproof plugging.
3.2.4 Before connecting pipeline and equipment, the system pipeline shall pass the hydrostatic test
and flushing (purging) test.
3.2.5 Before concealed construction, it shall pass the quality inspection jointly carried out by the
technical (quality) principal of construction project, professional foreman and full-time quality inspector
before reporting it to the supervision engineer (representative of the development organization) for
inspection and acceptance and filling the acceptance records of concealed works. If necessary, images
shall be provided for important positions.
3.2.6 Manhole shall be arranged for concealed equipment and valve and shall meet the requirements
of repair and maintenance.
3.2.7 The instruments for check, test and commissioning shall be calibrated and fall within their
validity.
3.3 Material and Equipment Quality Management
3.3.1 The construction of ventilation and air conditioning shall be carried out according to construction
drawings and relevant technical product documents. The material and equipment in use shall meet the
design requirements and the requirements of relevant current national standards. Those expressly
prohibited or obsoleted by the State must not be used.
3.3.2 The material and equipment used for ventilation and air conditioning shall be provided with
quality certificates in Chinese and shall be complete and effective. The quality certificates shall reflect
the variety, specification, quantity and performance index of material and equipment and shall comply
with the received material and equipment. The type inspection report on equipment shall be applicable
for such series of products and shall fall within its validity.
3.3.3 Where the material and equipment approaches the construction site, the construction organization
shall inspect and test them and report it to the supervision engineer (representative of the development
organization) for acceptance and filling the acceptance records of received material (equipment) as soon
as such inspection and test are passed. Those that fail to pass such acceptance shall not be used.
3.3.4 The thermal insulation material and fan coil used for ventilation and air conditioning shall be
inspected through evidential sampling according to the relevant requirements of the current national
standard “Code for Acceptance of Energy-efficient Building Construction” GB 50411 where they
approach the construction site.
3.4 Safety and Environmental Protection
3.4.1 The enterprise which undertakes the construction of ventilation and air conditioning shall have
appropriate safe production license. Appropriate safety and environmental protection management
system shall be established for the construction and installation site where full-time safety personnel
shall be arranged.
3.4.2 Disclosure of safety technology shall be carried out before the construction of ventilation and
air conditioning. The safety precautions and facilities for construction shall meet the relevant national
requirements. The construction equipment shall be used according to appropriate safety regulations.
3.4.3 The temporary power utilization at the construction site shall comply with the relevant current
national standards. During construction, effective measures shall be taken to guarantee the safety of
power utilization and equipment operation.
3.4.4 During electric and gas welding, the operation personnel shall take their posts with certificates
and a special person shall be arranged to supervise them; moreover, fire-fighting equipment shall be
provided. After completion of electric and gas welding, careful inspection shall be carried out before
leaving to eliminate potential hazards.
3.4.5 Where the material and equipment are handled and hoisted on site, a special person shall be
arranged for command so as to avoid injuring any person or damaging any material and equipment.
3.4.6 Before hoisting and transporting large equipment, special technical scheme shall be prepared
and shall not be implemented until it is approved.
3.4.7 In case of operation under relatively enclosed environment, temporary ventilation measures
shall be taken.
3.4.8 Where paint and adhesive are used, protective measures shall be taken and the operation area
shall keep well ventilated.
3.4.9 The inflammables, explosives and other hazardous articles shall be stored safely and separately.
The volatile articles shall be preserved in sealed condition while the residues and storage vessels of
hazardous articles shall be recycled properly.
3.4.10 Dust control and noise reduction measures shall be taken for construction processes where
smoke, dust and noise may be generated.
6 Air Valve and Components Making
6.1 General Requirements
6.1.1 The materials for making air valve and components shall meet the requirements of design and
relevant technical documents.
6.1.2 The finished air valve and components in use shall have acceptable quality certificates.
6.2 Air Valve
6.2.1 The quality of finished air valve shall meet the following requirements:
1 The ...