SY/T 7021-2024 Specification for design of heating ventilation and airconditioning of petroleum and natural gas engineering English, Anglais, Englisch, Inglés, えいご
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ICS
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Professional standard of the People's Republic of China
SY/T 7021-2024
Specification for design of heating ventilation and air conditioning of petroleum and natural gas engineering
石油天然气工程供暖通风与空气调节设计规范
(English Translation)
Issue date: 2024-09-24 Implementation date: 2025-03-24
Issued by National Development and Reform Commission, P.R.C
Contents
1 General provisions
2 Terms
3 Indoor and outdoor design conditions
3.1 Indoor design conditions
3.2 Outdoor air design conditions
4 Heating
4.1 General requirements
4.2 Radiator heating
4.3 Hot water radiant heating
4.4 Warm air heating system and warm air curtain
4.5 Electric heating
4.6 Heating pipeline
4.7 Heating entrance device
5 Ventilation
5.1 General requirements
5.2 Natural ventilation
5.3 Mechanical venilation
5.4 Emergency ventilation
5.5 Dust removal and harmful gas purification
5.6 Equipment and duct
6 Air conditioning
7 Heating and cooling source
7.1 General requirements
7.2 Sewage-source heat pump system
7.3 Air-source heat pump system
7.4 Ground-coupled heat pump system
7.5 Solar heating system
8 Fire and explosion prevention
8.1 Heating system
8.2 Ventilation and air conditioning system
9 Smoke control and smoke exhaust system
10 Monitor and control
10.1 General requirements
10.2 Heating and ventilation system
10.3 Air conditioning system
Explanation of wording in this code
List of quoted standards
Addition: Explanation of provisions
1 General Provisions
1.0.1 This code is formulated to adopt appropriate technologies in the design of heating, ventilation, and air conditioning for petroleum and natural gas engineering, ensure production safety, create indoor environments meeting occupational health requirements, rationally utilize energy, improve resource utilization efficiency, and protect the environment.
1.0.2 This code applies to the design of heating, ventilation, and air conditioning for the following new, modified, and expanded construction projects:
1 Onshore oil and gas field projects.
2 Onshore terminal projects for offshore or beach/shallow sea oil and gas fields.
3 Underground gas (oil) storage projects.
4 LNG terminal and station projects.
5 Stations and line block valve chambers of oil and gas transmission pipelines.
1.0.3 The design of heating, ventilation, and air conditioning for production and auxiliary buildings in petroleum and natural gas engineering shall not only comply with this code but also conform to the provisions of current relevant national standards.
2 Terminology
2.0.1 lower explosive limit
The lowest concentration of a flammable gas, vapor, dust, or mist in air that forms an explosive gas mixture.
2.0.2 positive pressure ventilation
A method where a mechanical supply system continuously delivers sufficient clean air into a space (or equipment) to maintain a positive pressure relative to its surroundings.
2.0.3 blast-resistant building
A building designed to withstand the parameters of blast waves determined by an explosion safety assessment, in order to protect personnel and facilities inside and reduce the impact of external explosion accidents on production operations.
2.0.4 emergency ventilation
Ventilation used to exhaust or dilute large quantities of toxic, harmful substances, explosive gases, vapors, or dust suddenly released during an accident within a room or building.
2.0.5 production building
Various types of buildings constructed directly to meet the needs of production processes.
2.0.6 assistant production building
Various types of buildings constructed to indirectly serve the needs of production processes, or to meet the requirements of production management, fire protection, and the living needs of production personnel during working hours.
3 Indoor and Outdoor Design Calculation Parameters
3.1 Indoor Design Parameters
3.1.1 Indoor air design parameters for heating and air conditioning shall be determined based on factors such as building type, production characteristics and requirements, and labor intensity. They should preferably be selected according to Table 3.1.1.
3.1.2 For buildings equipped with heating, the average wind speed in the occupied zone during winter shall comply with the following regulations:
1 For auxiliary production buildings, it should not exceed 0.3 m/s.
2 For production buildings, when the indoor heat dissipation is less than 23 W/m³, it should not exceed 0.3 m/s; when the indoor heat dissipation is greater than or equal to 23 W/m³, it should not exceed 0.5 m/s.
3.1.3 The fresh air requirement for production and auxiliary buildings shall meet the following:
1 For blast-resistant buildings, the fresh air volume for the air conditioning system shall be the maximum of the following three values:
Calculated based on personnel, not less than 50 m³/h per person.
10% of the total supply air volume.
The fresh air volume required to maintain positive pressure indoors.
2 For other buildings, calculated based on personnel, not less than 30 m³/h per person.
3.1.4 When the quantity of harmful substances, excess heat, or excess moisture released into a room cannot be determined, the ventilation air change rates for production and auxiliary buildings should preferably be selected according to Table 3.1.4.
3.2 Outdoor Air Design Parameters
3.2.1 Outdoor air design parameters shall comply with the provisions of the current national standard "Code for design of heating, ventilation and air conditioning for industrial buildings" GB 50019.
3.2.2 When outdoor air design parameters are lacking, they shall be determined based on local surveys, measurements, and comparison with meteorological data from neighboring stations with similar geographical and climatic conditions, or calculated according to the appendix of the current national standard "Code for design of heating, ventilation and air conditioning for industrial buildings" GB 50019.
4 Heating
4.1 General Provisions
4.1.1 The selection of heating methods shall be determined through technical and economic comparison, based on the function and scale of the building, local meteorological conditions, energy availability, energy policies, environmental protection requirements, etc.
4.1.2 Buildings located in severe cold and cold regions shall be equipped with heating when operating personnel frequently stay, concentrate, or when required by process needs.
4.1.3 Buildings located in hot summer and cold winter regions, as well as mild regions, may be equipped with heating when operating personnel frequently stay or concentrate.
4.1.4 For industrial buildings in severe cold and cold regions, during non-working hours or periods of intermittent use, when the indoor temperature needs to be maintained above 0°C and the building's thermal storage capacity is insufficient, a standby heating system shall be provided to maintain 5°C. If processes or usage conditions have special requirements, the indoor temperature to be maintained by standby heating shall be determined accordingly.
4.1.5 For industrial buildings in severe cold and cold regions, if the production process has no special requirements for winter indoor temperature and the building area per operating personnel exceeds 100 m², localized heating should be provided at fixed workstations.
4.1.6 The heating medium for the heating system shall be determined through technical and economic comparison based on the building's purpose, heat supply conditions, local climate characteristics, etc. Waste heat should be utilized first, and hot water is preferred; when plant heat supply is primarily based on process steam, and provided hygiene, safety, and energy-saving requirements are not violated, steam may be used for buildings other than those with concentrated or long-term personnel occupancy.
4.1.7 Rooms such as equipment rooms, control rooms, communication rooms, electrical switch rooms, and others where water ingress could cause electrical short circuits should not use hot water or steam heating. Heating pipes not serving these rooms shall not pass through them. If hot water or steam heating is used in the aforementioned rooms, welded connections shall be used, and valves shall not be installed within these rooms.
4.1.8 Automatic room temperature control devices shall be installed in each room of the heating system.
4.2 Radiator Heating
4.2.1 When calculating the number of radiators, corrections shall be made based on radiator connection method, installation type, and the number of sections in a group.
4.2.2 Radiators shall be installed exposed (not concealed).
4.2.3 When selecting radiators, the following provisions shall apply:
1 The working pressure of the radiator shall be determined based on the pressure requirements of the heating system.
2 In production workshops, radiators with aesthetically pleasing appearance, easy to clean, should be used.
3 In production workshops with corrosive gases or rooms with relatively high humidity, corrosion-resistant radiators shall be used.
4 For steam heating systems, plate-type and flat-tube radiators shall not be used, nor shall steel column radiators made of thin steel sheet.
5 When aluminum radiators are used, internally protected aluminum radiators shall be selected, and they shall meet the product's water quality requirements.
6 When using cast iron radiators in hot water heating systems equipped with thermostatic valves and heat meters, radiators with sand-free internal cavities shall be used, and cast iron radiators with sand inclusions in the water flow channels should be avoided.
