TCVN 4318:2012 CONSTRUCTION DESIGN DOCUMENT SYSTEM – HEATING, VENTILATION – CONSTRUCTION DRAWINGS

Foreword

TCVN 4318:2012 replaces TCVN 4318-1986.

TCVN 4318:2012 was converted from TCVN 4318:1986 according to the provisions in Clause 1, Article 69 of the Law on Standards and Technical Regulations and Point b), Clause 1, Article 6 of the Government’s Decree No. 127/2007/ND-CP dated August 1, 2007 detailing the implementation of some articles of the Law on Standards and Technical Regulations.

TCVN 4318:2012 was compiled by the Institute of Architecture, Urban and Rural Planning, proposed by the Ministry of Construction, recommended by the Directorate for Standards, Metrology and Quality, and announced by the Ministry of Science and Technology.

1. Scope

1.1. This standard specifies the content and presentation of construction drawings for heating and ventilation equipment systems in construction works.

1.2. When preparing construction drawings for heating and ventilation equipment systems, it is necessary to comply with other relevant regulations.

2. Composition of construction drawings, general principles of presentation

2.1. The main components of construction drawings include:

• General data (cover sheet);
• Floor plans, cross-sections of heating and ventilation equipment systems (including air conditioning);
• Schematics of heating and ventilation systems;

2.2. The composition of construction drawings for heating and ventilation systems includes the following drawings:

• Simple heating substations (control stations for heating systems that supply heat to ventilation equipment) with a heat carrier pipe diameter less than 150 mm;
• Water treatment systems for hot water supply systems;
• Gas supply systems.

2.3. Drawings of the general shape of non-typical components, non-standardized equipment, and the order list of equipment for heating and ventilation systems are specified in the form of an order portfolio in accordance with the general instructions for construction drawings.

2.4. The scales used in the drawings are specified in Table 1.

Table 1 – Drawing scales

2.5. On the drawings, thick solid lines are used to represent details of the heating and ventilation system (pipes, air exhaust ducts…); thin solid lines are used to represent building structures and technological equipment.

2.6. Heating, ventilation systems and system equipment are denoted by the letters specified in Table 2 in combination with numbering the systems (equipment) according to the notation.

FOR EXAMPLE: TCK-1; TCK-2.

2.7. The details of the heating system are denoted by the letters specified in Table 3 in combination with numbering each detail according to the notation.

FOR EXAMPLE: ođ-1, ođ-2…

Table 2 – Notation for heating and ventilation equipment

Table 3 – Notation for heating system details

3. General data (cover sheet)

3.1. On the cover sheet, in addition to the general provisions for construction drawings, the following items are included:

• Layout diagram of heating and ventilation systems;
• Characteristics of heating and ventilation systems;
• Basic drawing data on heating and ventilation systems;

3.2. On the layout diagram of heating and ventilation equipment, it is necessary to show:

• The scope of the building/project;
• The building/project’s reference axes and the distances between the axes;
• Heating and ventilation equipment;
• Distances from heat carrier pipes to the building/project’s reference axes.

3.3. On the layout diagram of the building/project, heating and ventilation equipment is depicted by circles with diameters from 2 mm to 5 mm along with equipment labels and drawing numbers, in which equipment details and mechanisms can be shown.

3.4. The general instructions section on the cover sheet includes:

• Data and parameters of heat carriers (water, steam, electricity…);
• Calculated parameters of indoor and outdoor air;
• Special requirements for heating and ventilation equipment (explosion safety, acid corrosion resistance…);
• General requirements in the manufacturing process, the process of painting and coating air ducts and water pipes;
• Technical instructions for the anti-corrosion layer of heating and ventilation system components.

3.5. The list of heating and ventilation systems is uniformly specified according to the template in the general instructions for construction drawings.

For designed works, if there are no detailed drawings of measuring and automation control devices, the list must fully enumerate the devices and measuring controls.

In the “Notes” column of the heating and ventilation system list, the weight of a finished product must be recorded for key equipment.

At the end of the “Name” column of the heating and ventilation system list, the phrase “Weight of a finished product” must be written. Before the name of each finished product and material, a serial number must be given in the “Notation” column, and full notations of system details (including standardized and typified product documents) and the names of factories producing that finished product or material must be recorded.

3.6. The list of heating and ventilation systems includes:

• Production area of the factory/project;
• Administration area of the factory/project. Finished products or materials of each part will be summarized and separated into groups:
• Ventilation;
• Heating;
• Heat supply.

3.7. The measurement units for finished products and materials in the list are specified as follows:

4. Floor plans and cross-sections of heating and ventilation systems

4.1. The floor plan of the heating and ventilation system of each floor is shown in the form of a cross-section when cutting the system with a horizontal plane going through below the ceiling of that floor.

In case the air ducts and different details of the heating and ventilation system on one floor are arranged too complexly, or the density of the depictions is too large, the floor plan will be shown in the form of multiple cutting layers with horizontal planes going through the details that need to be depicted at different elevations.

When necessary, the projections of equipment belonging to the heating and ventilation system located on the roof (such as exhaust hoods, roof exhaust fans…) will be shown on the floor plan of the heating and ventilation system of the top floor.

4.2. The floor plan and cross-section of the heating system are specified to be shown together with the floor plan and cross-section of the ventilation system.

4.3. When writing the floor plan name, it is necessary to note the elevation of the floor surface.

For example: Floor plan at 0.00 m elevation.

When writing the names of the cross-sections, it is necessary to note the serial number.

For example: Cross-section 2-2.

4.4. On the floor plan and cross-section of the heating and ventilation system, in addition to the system details, it is also necessary to show the building structures, technological equipment with local exhaust fans, and other equipment that affect the process of installing air ducts.

Pipes arranged on top of each other are conventionally depicted by parallel lines on the floor plan.

4.5. On the drawings of floor plans, cross-sections, and machine assemblies, the details of the ventilation system (such as vents, filters, local exhaust fans, fans, motors…) are shown in the form of simplified diagrams.

The details of the heating system and heat supply for ventilation equipment (such as pipes, heaters, heating equipment and devices) and vents are shown in the form of conventional diagrams. Pipes with a diameter larger than 100 mm are depicted by two parallel lines.

4.6. On the floor plans, cross-sections, and assembly drawings, the following data are fully shown:

• Notation of cross-sections;
• Reference axes of the building/project and the distances between the axes;
• Floor elevations of each floor and the main foundation;
• Reference axes of heating and ventilation equipment;
• Diameters (cross-sections) and reference axes of air ducts;
• Distances from technological equipment to the building/project’s reference axes;
• Number of coil turns of finned heating equipment, number and length of regulating ducts, edged ducts, number of pipes in a regulating set, length of regulating set, and similarly for other heating equipment;
• Diameter and thickness of pipes (with a diameter larger than 50 mm) of the heating and heat supply system;
• Notation of risers in the heating system;
• Reference axes of expansion pipes;
• On the cross-section, in addition to the basic dimensions, the elevations of various pipes and air ducts must also be shown according to the following rules:
• Measured to the center axis for round air ducts;
• Measured to the bottom for edged air ducts, structures of heating and ventilation equipment pedestals;
• Measured to the top for exhaust ducts.
• On the floor plan of the heating and ventilation system, there must be a summary table of local exhaust fans for technological equipment;
• Summary table.

The presentation of the heating and ventilation system floor plan is shown in Figure 1 and Figure 2, and the cross-section is shown in Figure 3.

Dimensions are in millimeters

Figure 1 – Example of heating and ventilation system floor plan – cutting layer 1-1

Dimensions are in millimeters

Figure 2 – Example of heating and ventilation system floor plan – cutting layer 2-2

Figure 3 – Example of heating and ventilation system cross-section

5. Ventilation system schematics

5.1. Ventilation system schematics must show the axonometric projection form.

5.2. Ventilation system schematics need to show:

• Elevations measured to the center axis for round air ducts and to the bottom for edged air ducts;
• Equipment of ventilation devices;
• Technological detail assemblies equipped with local exhaust fans (in complex cases);
• Air parameter measurement holes and air duct cleaning holes;
• Local dust collectors;
• Control mechanisms, air distribution devices, non-typical air clamps and other details.

5.3. Discontinuities of air ducts on the schematics are denoted by lowercase letters.

5.4. On the ventilation system schematics, system details are represented by conventional diagram symbols.

The presentation of ventilation system schematics is shown in Figure 4 and Figure 5.

Figure 4 – Example of ventilation system schematic

Figure 5 – Example of ventilation system schematic

5.5. When writing the name of the ventilation system schematic, it is necessary to fully write the notations and serial numbers of the systems.

For example: Schematic of system TCK-5; HCK-8.

Below the schematic, abbreviations can be used.

For example: TCK-5; HCK-8.

6. Heating system schematics

6.1. Schematics of heating and heat supply systems must be shown in the form of space projections.

6.2. Heating system schematics must show:

• Pipes and pipe diameters (cross-sections);
• Elevations measured to the center axis and slopes of the pipes;
• Dimensions of horizontal pipe segments;
• Fixed supports, expansion pipes and typical coupling devices;
• Shut-off and control valves;
• Risers and heating systems;
• Inspection and measuring devices and other necessary details of the heating system.

6.3. Discontinuities of pipes on the schematics are denoted by lowercase letters.

6.4. Details of heating and heat supply systems on the schematics are represented by conventional diagram symbols.

The presentation of heating system schematics is shown in Figure 6 and Figure 7.

6.5. When writing the name of the heating system schematic, it is necessary to write the system’s serial number (for example: Heating system – 1). When writing the name of the heat supply system schematic for heating and ventilation equipment, it is necessary to write the notation and serial number of the equipment.

For example: Heat supply system for equipment TCK-1; TCK-2; MN-1; MN-2

6.6. Heating system schematics must show:

• Table of expansion pipe dimensions;
• Schematics of heating and heat supply control stations (see Figure 8). It is necessary to write the serial number when naming the control station (For example: Control station – 1). Schematics of heating and heat supply assemblies (air drying assembly, air cooling assembly…) are shown in Figure 9.

Figure 6 – Example of heating system schematic

Figure 7 – Example of heating system schematic

Figure 8 – Example of heating and heat supply control station schematic

Figure 9 – Example of heating and heat supply assembly schematics

7. Floor plans, cross-sections of heating and ventilation equipment

7.1. On the floor plans, cross-sections and drawings of heating and ventilation equipment assemblies, the equipment details are depicted in a simplified manner. The connection and installation process of each part of the heating and ventilation equipment will be shown in detail when necessary.

7.2. On the floor plans, cross-sections and drawings of heating and ventilation equipment assemblies, it is necessary to show:

• Notation of cross-sections;
• Reference axes of the building/project and the distances between the axes;
• Basic dimensions;
• Elevations and equipment, distances from equipment to reference axes and building/project structures.

7.3. Air ducts on the equipment floor plan are shown by dashed lines, on the cross-section by thin solid lines.

Ducts surrounding the air cooling assembly are represented by a single line when the duct diameter is less than 100 mm, by two lines when the duct diameter is larger than 100 mm.

7.4. On the floor plans, cross-sections and drawings of heating and ventilation equipment assemblies, in addition to the equipment details, it is necessary to show the building structures and devices serving inspection and measurement purposes.

The presentation of floor plans and cross-sections of heating and ventilation equipment is shown in Figure 10, Figure 11, Figure 12 and Figure 13.

7.5. The details of heating and ventilation equipment are denoted by letters based on the equipment notation as mentioned in 2.6 in combination with numbering the details of each equipment.

For example: TCK-1.1; TCK-1.2; HCK-5.1; HCK-5.2.

7.6. When writing the name of the equipment, it must be fully written.

For example: Equipment of system TCK-1; HCK-1.

7.7. When necessary, the drawings of heating and ventilation equipment must have technical requirements for the construction of the installation process of heating and ventilation equipment.

7.8. The list of heating and ventilation equipment must be summarized and presented on the floor plan sheet of the heating and ventilation equipment.

In the list, in the “Notes” column, it is necessary to write the weight of a finished product for the main equipment of the heating and ventilation equipment system.

At the bottom of the “Name” column of the list, the phrase “Weight of a finished product” must be written.

In the “Notation” column, it is necessary to write the dossier notation of the equipment details (including the dossier of typified and standardized finished equipment) and the name of the factory producing the finished product.

Figure 10 – Example of heating and ventilation equipment floor plan

Figure 11 – Example of heating and ventilation equipment cross-section

Figure 12 – Example of heating and ventilation equipment cross-section

Figure 13 – Example of ventilation equipment cross-section 1-1