Standard ICS number:Building materials and buildings>> Facilities in buildings>> 91.140.30 Ventilation and air conditioning systems
Standard Classification Number:Engineering Construction>>Heating, Gas Supply, Air Conditioning and Refrigeration Engineering>>P48 Ventilation and Air Conditioning Engineering
This standard specifies the classification, basic rules, technical requirements, test methods, inspection rules and marking, packaging, transportation, storage, etc. of ventilation and air conditioning vents. JG/T 14-1999 Ventilation and air conditioning vents JG/T14-1999 Standard download decompression password: www.bzxz.net
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JG/T14—1999 According to the requirements of the State Bureau of Quality and Technical Supervision's "Notice on the Abolition of Professional Standards and National Standards to be Transformed after Rectification" (No. 216 of the Bureau of Quality and Technical Supervision (1998)), the Ministry of Construction has cleaned up, rectified and reviewed the national standards approved by the State Bureau of Technical Supervision in 1992 for the Ministry of Construction to be converted into industry standards and the product standards approved and issued by the Ministry of Construction before 1992. The Ministry of Construction confirmed and issued the JGJ77—91 "Ventilation and Air Conditioning Ventilation" standard with the document "Notice on the Announcement of the Results of the Rectification of the Ministry of Construction's Product Standards" (Jianbiao (1999) No. 154), and the new number is JG/T14—1999. In order to facilitate the implementation of the standard, only the cover, first page, and the above-the-margin statement of the original standard are modified accordingly, and this explanation is added and reprinted, and the original standard version is abolished at the same time. 1583 Construction Industry Standard of the People's Republic of China Air outlets and inlets for ventilation and air conditioning Subject content and scope of application JG/T 14—1999 This standard specifies the classification, basic specifications, technical requirements, test methods, inspection rules and markings, packaging, transportation, storage, etc. of ventilation and air conditioning air outlets (referred to as air outlets). This standard applies to all types of air outlets and inlets in ventilation and air conditioning systems. Other products with similar uses can also refer to this standard. 2 Reference standards GB8070 Test method for performance of air distributors GB321 Priority numbers and priority number series GB5237 Aluminum alloy building profiles GB11253 Cold-rolled thin steel plates and strips of carbon structural steel and low-alloy structural steel GB8170 Numerical rounding rules 3 Classification and basic specifications 3.1 Classification 3.1.1 Classification by purpose: a. Air outlet, b. Air inlet. 3.1.2 Classification by type: a. Louver air outlet: the shape is square, rectangular, and circular; the blades are single-layer, double-layer, etc.; b. Diffuser: round, square, rectangular, disc-shaped, etc.; C. Nozzle: round, rectangular, spherical, etc.; d. Slit type air outlet: single slit, double slit and multiple slits, etc.; e. swirl air outlet; f. orifice air outlet (including mesh air outlet); g. special air outlet: such as chair air outlet, lamp air outlet, grate air outlet, grille air outlet, etc. 3.2 Basic specifications 3.2.1 The basic specifications of air outlets are expressed by neck size (referring to the interface size with the air duct) and arranged according to the requirements of GB321, see Table 1 and Table 2 for details. Diameter D Specification code Diameter D Specification code Approved by the Ministry of Construction of the People's Republic of China on 1999-06-04 1584 Basic specifications for circular air outlets Implementation on 1999-06-04 Specification code Height H Width W JG/T 14—1999 Basic specifications for square and rectangular air outlets 32124012 3.2.2 The basic specifications of diffusers can be arranged at equal intervals of 50mm, 60mm and 70mm. 3.3 Model Notation 3.3.1 Model Notation Specification Code Classification Code: in Chinese Pinyin 8 012|10 012 1001612516 1003212532 1004012540 Alphabetic representation (see Table 3) Air outlet code Table 3 Classification code table Air outlet name Single-layer louver air outlet Double-layer louver air outlet Circular diffuser Square diffuser Rectangular diffuser Disc diffuser Circular nozzle Rectangular nozzle Spherical nozzle Classification code Note: The specification code is expressed by 1/10 of the basic specification value of the air outlet. 3.3.2 Model example: FJS-3225 indicates a rectangular diffuser with a specification of 320mm×250mmFQP-16 Name of air outlet Slit air outlet Swirl air outlet Orifice air outlet Mesh air outlet Chair air outlet Lamp air outlet Hole air outlet Grille air outlet 100 6312563 Classification code Indicates spherical nozzle, specification is 160mm FYS-25 Indicates circular diffuser, specification is 250mm 4 Technical requirements 4.1 Basic requirements JG/T14—1999 4.1.1 Air outlet products shall comply with the requirements of this standard and be manufactured according to the drawings and technical documents approved by the prescribed procedures. 4.1.2 The allowable values of dimensional deviation are as follows: a. The dimensional tolerance of rectangular (including square) air outlets is shown in Table 4. Table 4 Dimensional tolerance Air outlet side length 300~800 b. The tolerance between the two diagonals of rectangular (including square) air outlets is shown in Table 5. Table 5 Tolerance between two diagonals Length of diagonal The size tolerance of circular air outlet is shown in Table 6. Diameter of air outlet 300~500 Table 6 Size tolerance 4.1.3 The decorative surface of the air outlet should be flat and smooth, and its flatness should meet the specified values in Table 7. Table 7 Flatness Surface area, m2 Flatness, mm >0.3,≤0.8 4.1.4 The gap of the joint joint on the decorative surface of the air outlet should not exceed 0.15mm for aluminum profiles and 0.2mm for other materials. 4.1.5 The blades of the air outlet should meet the following requirements: a. The size deviation of the blade spacing should not exceed ±1mm; b. The curvature of the blade is 3/1000mm; c. The parallelism of the blade is 4/1000mm. 4.2 Appearance requirements 4.2.1 The decorative surface of the air outlet should be free of obvious scratches and indentations. 4.2.2 The color of the decorative surface of the air outlet should be consistent and without mottled phenomenon. 4.2.3 The welding points should be smooth and firm. 4.3 Performance requirements 4.3.1 Mechanical properties a. The movable parts of the air outlet should move freely, have uniform damping, and no stuck or loose. b. Products with adjustable or detachable guide vanes should be easy and reliable to adjust and disassemble, and no looseness after positioning. 4.3.2 Aerodynamic performance a. The rated air volume and range values of the air outlet under standard test conditions should be determined. The standard test conditions are: under standard state air, the terminal velocity of the jet is 0.5m/s, and the total air pressure is 10Pa. 1586 JG/T 14 - 1999 b. When the speed of the tuyere at the neck is 6m/s, the total pressure loss shall not exceed 100Pa. c. The values of aerodynamic performance shall comply with the numerical rounding rules of GB8170. The air volume shall be rounded to an integer with a zero decimal; the range (or diffusion radius) and pressure loss shall be rounded to one decimal place, and the local resistance coefficient shall be rounded to two decimal places. 4.4 Material requirements The tuyere shall be made of materials with good corrosion resistance and easy to form. a. When aluminum profiles are used, they shall comply with the provisions of GB5237. b. When steel is used, they shall comply with the provisions of GB11253. C. Other materials may also be used according to the requirements of use. However, they shall meet the strength and durability requirements of the tuyere and shall comply with the provisions of relevant material standards. Test method 5.1 Aerodynamic performance test The aerodynamic performance of the air outlet shall be tested in accordance with the test items, devices and methods specified in GB8070. 5.2 Dimension measurement The various dimensions and deviations of the air outlet shall be measured with a steel ruler, feeler gauge or sample. 5.3 Appearance inspection The appearance inspection shall be carried out visually under an illumination of not less than 300 1x. 5.4 Mechanical performance inspection It shall be inspected by hand or with special tools (such as sample) under normal use conditions. 5.5 Transportation test After the packaged air outlet is stably placed on a truck (the truck travels 300km on a third-class highway at a speed of 25-30km/h) or shaken on a simulated vibration table, the dimensional deviation, appearance and mechanical performance shall be re-measured. 6 Inspection rules 6.1 Inspection categories and inspection items 6.1.1 Air vent inspection is divided into factory inspection (or delivery inspection) and type inspection. 6.1.2 Inspection items are as per Table 8. Table 8 Inspection items for air inlets Note: Item 6 does not need to be inspected for air inlets. Name of inspection item Dimensional deviation Mechanical properties Pressure loss and local resistance coefficient Range (or diffusion radius) Transportation test Packaging, marking Clause of this standard 4.1.2~4.1.5 4.2.1~~4.2.3 4.3.1 and 5.4 4.3.2 and 5.1 4.3.2 and 5.1 4.3.2 and 5.1 6.2 Factory inspection JG/T 14 1999 6.2.1 Each air outlet must be inspected and qualified by the inspection department of the manufacturer, and can only leave the factory with a quality inspection certificate. 6.2.2 The factory inspection of air outlets should generally be carried out item by item according to the contents of 1, 2, 3, and 8 in Table 8. Only after passing the inspection can they be put into the warehouse. 6.3 Type inspection 6.3.1 Type inspection should be carried out when the air outlet has one of the following conditions: a. When the new product produced by trial production is finalized; b. When the product structure, manufacturing process, materials, etc. are changed, which have an impact on product performance; c. When production is resumed after a long period of suspension; d. When the product is transferred to another factory for production; e. In mass production, it should be carried out at least once every two years; f. When the national quality supervision agency puts forward type inspection requirements. 6.3.2 Type inspection of air outlets should include all items in Table 8. 6.3.3 Type inspection sampling method: samples should be drawn from qualified products of the manufacturer. The number of samples to be drawn shall be in accordance with Table 9. Table 9 Number of samples to be inspected Number of samples to be inspected Number of samples to be inspected 100~500 6.3.4 Judgment rule: if one of the samples fails the inspection, double the number of samples to be drawn. If there is still one sample that fails the inspection, the batch of tuyere shall be judged as unqualified products. 7 Marking, packaging, transportation and storage 7.1 Marking 7.1.1 Each product shall have the manufacturer's trademark and be fixed in a conspicuous position. 7.1.2 The packaging box of the product shall indicate: a. Name, trademark or code of the tuyere; b. Name of the manufacturer; c. Model and specification of the tuyere;bZxz.net d. Factory number; e. Date of manufacture; f. Quantity and weight. 7.1.3 The packaging box should be marked with signs such as moisture-proof, anti-expansion, no rolling, and handle with care. 7.2 Packaging 7.2.1 Each product should be wrapped with a plastic bag or other protective materials. 7.2.2 The wrapped products should be laid flat in the carton and padded with soft materials. The packaging cartons must be tied tightly and firmly. 7.2.3 The packaging box should contain relevant documents such as packing list and product certificate. 7.3 Transportation and storage 7.3.1 The products should not be hit, squeezed, thrown, or exposed to rain or snow during transportation. 7.3.2 The products should be stored in a ventilated and dry warehouse. They should not be stacked too high, and there should be no corrosive gas around. 1588 Additional Notes: This standard was proposed by the Standard and Norm Research Institute of the Ministry of Construction. This standard is under the jurisdiction of the China Academy of Building Research. JG/T14—1999 This standard was drafted by the China Academy of Building Research, Beijing Equipment Installation Engineering Company, Beijing Qingyun Instrument Factory, and Shaanxi Equipment Installation Engineering Company. The main drafters of this standard are Zou Yueqin, Peng Rong, Wang Fusheng, Ma Jiafu, and Yan Xiling. This standard is entrusted to the China Academy of Building Research for interpretation. 1589 Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.