GB 50738-2011 English PDF (GB50738-2011)

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GB 50738-2011: Code for construction of ventilation and air conditioning
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...