GB/T 19410-2008 PDF English (GB/T 19410-2003: Older version)

GB/T19410-2008 (GBT19410-2008): PDF in English

GB/T 19410-2008 GB NATIONAL STANDARD OF THE PEOPLE'S REPUBLIC OF CHINA ICS 23.140 J 72 Replacing GB/T 19410-2003 Screw refrigerant compressors ISSUED ON: NOVEMBER 12, 2008 IMPLEMENTED ON: MAY 1, 2009 Issued by: General Administration of Quality Supervision, Inspection and Quarantine of PRC; Standardization Administration of PRC. Table of Contents Foreword ... 3 1 Scope ... 5 2 Normative references ... 5 3 Terms and definitions ... 6 4 Classification and basic parameters ... 7 5 Technical requirements ... 8 6 Test methods ... 13 7 Inspection rules ... 15 8 Labeling, packaging, transportation and storage ... 17 Appendix A (Normative) Air tightness test ... 20 Appendix B (Normative) Pneumatic test ... 22 Appendix C (Normative) Hydraulic test ... 23 Appendix D (Normative) Burst test ... 24 Appendix E (Normative) Vibration value measurement method ... 26 Screw refrigerant compressors 1 Scope This standard specifies the terms and definitions, classification and basic parameters, technical requirements, test methods, inspection rules and markings, packaging and storage of screw refrigerant compressors and screw refrigerant compressor units. This standard applies to screw refrigerant compressors (hereinafter referred to as compressors) and screw refrigerant compressor units (hereinafter referred to as units) using R717, R22, R134a, R404A, R407C, R410A and R507A as refrigerants. For compressors and compressor units using other refrigerants (such as R290 and R1270), this standard can be used for reference. This standard does not apply to compound screw refrigerant compressors and compound screw refrigerant compressor units. 2 Normative references The clauses in the following documents become the clauses of this standard through reference in this standard. For all the referenced documents with dates, all the subsequent amendments (excluding errata) or revisions are not applicable to this standard. However, the parties who reach an agreement based on this standard are encouraged to study whether the latest versions of these documents can be used. For all the referenced documents without dates, the latest versions are applicable to this standard. GB 150 Steel pressure vessels GB 151 Tubular heat exchangers GB/T 191 Packaging - Pictorial marking for handling of goods (GB/T 191-2000, eqv ISO 780:1997) GB 536 Liquefied anhydrous ammonia GB 755 Rotating electrical machines - Rating and performance (GB 755-2000, idt IEC 60034-1:1996) GB/T 1032 Test methods for three-phase asynchronous motors 5.2.1.1 The compressor and the unit shall be tested in accordance with the method in 6.7 to determine the refrigerating capacity, refrigerating performance coefficient and shaft power or input power under nominal conditions. 5.2.1.2 When the compressor and the unit are tested under the nominal conditions specified in Table 1, the maximum deviation of their performance values shall comply with the following provisions: a) The refrigerating capacity shall not be less than 95% of the indicated value; b) The coefficient of refrigerating performance shall not be less than 95% of the indicated value. 5.2.2 Partial load operation test requirements Compressors and units with energy regulating devices shall be subject to partial load operation test in accordance with 6.7.2. Partial load is generally divided into three levels: 25%, 50% and 75% (if it is not possible to classify according to this level, it can be classified according to the characteristics of the compressor and unit energy regulating device itself), and its refrigerating capacity, and shaft power or input power shall be measured according to the nominal conditions specified in Table 1. 5.2.3 Full performance requirements The compressor and the unit shall be fully tested according to the method in 6.7.3, and a full performance curve or full performance table in accordance with the provisions of Table 1 and Table 2 shall be provided. The full performance curve or full performance table shall include the values of refrigerating capacity, refrigerating performance coefficient, and shaft power or input power at no less than 5 different condensing temperatures and no less than 7 evaporating temperatures at each condensing temperature. 5.3 Refrigerant Refrigerants for compressors and units: R22 shall comply with the provisions of GB/T 7373; R717 shall comply with the provisions of GB/T 536; other refrigerants shall comply with the provisions of relevant standards. 5.4 Lubricating oil and lubrication system 5.4.1 Lubricating oil for compressors and units shall comply with the requirements of GB/T 16630 or relevant standards. 5.4.2 The lubrication system shall be able to ensure that the compressor and the unit can operate normally and reliably. 5.5 Electric motor 5.5.1 The electric motors for open-type compressors shall comply with the requirements of GB 755. 5.5.2 Electric motors for semi-hermetic compressors and hermetic compressors shall comply with the requirements of relevant standards. 5.6 Valves 5.6.1 The safety valve of the compressor or unit shall be sensitive, leak-proof, safe and reliable, and comply with the requirements of GB/T 12241 or relevant standards. 5.6.2 The refrigeration stop valve installed on the compressor or unit shall comply with the requirements of JB/T 7245 or relevant standards. 5.7 Pressure vessels The pressure vessels used in conjunction with the unit shall comply with the requirements of pressure vessel standards such as JB/T 4750 or GB 150, and GB 151. 5.8 Sealing requirements 5.8.1 Compressors and units shall be sealed. The oil seepage at the shaft seal of the open-type compressor and the unit shall not exceed 3 mL/h when in operation. 5.8.2 To ensure the tightness of the compressor and the unit, the compressor and the unit shall be subjected to an air tightness test. The airtightness requirements shall be determined according to the filled leak detection medium. Their requirements are as follows: a) When the leak detection medium is dry, clean air, nitrogen or other inert gas, the compressor, unit or compressor housing and other pressure-bearing parts shall be subjected to an air tightness test at a test pressure not lower than the design pressure of the compressor, and there shall be no leakage in all parts during the test; b) When the leak detection medium is a mixed gas of dry, clean air (or inert gas such as nitrogen) containing refrigerant such as R22 (partial pressure not less than 10%), the pressure-bearing parts such as the compressor, unit or compressor housing shall be subjected to an airtightness test at a test pressure not less than the design pressure of the compressor. During the test, when each part is detected with a refrigerant leak detector with a sensitivity of 1×10-5 (MPa • cm3)/s, the single-point leakage rate shall not be greater than 14 g/a; c) When the leak detection medium is helium, the pressure-bearing parts such as other pressure-bearing parts to a hydraulic test of 1.25 times the design pressure or a pneumatic test of 1.15 times the design pressure. 5.10 Operation requirements The compressor or unit shall be tested for operation. Its operation shall be stable, without abnormal noise and severe vibration; the regulating device shall be flexible and correct; the pressure, input power and temperature shall not fluctuate abnormally, and the friction parts shall not have an abnormal temperature rise, etc. The unit assembled from the compressor that has passed the operation test does not need to be tested for operation. 5.11 Volume flow The volume flow of the compressor or unit shall not be less than 95% of the value indicated by the manufacturer. 5.12 Noise limit The noise value of the compressor or unit under nominal conditions shall not be greater than the value indicated by the manufacturer. 5.13 Vibration limit The vibration value of the compressor or unit shall not be greater than the vibration limit specified by the manufacturer. 5.14 Safety performance 5.14.1 The safety requirements for refrigerants shall comply with the provisions of GB/T 7778. 5.14.2 The safety requirements for compressors or units shall comply with the provisions of GB 9237 and related standards. 5.14.3 Electrical safety performance 5.14.3.1 Winding temperature limits When the compressor or unit is operating under the nominal refrigerating conditions specified in Table 1, the motor winding temperature shall not be higher than that specified in Table 3. affects its performance, the first product shall be subjected to type inspection. 7.5.2 For compressors or units with a nominal refrigerating capacity of more than 800 kW at high temperature (low condensing pressure) or a rated voltage of 3000 V and above, the type inspection may be carried out at the site of use. 8 Labeling, packaging, transportation and storage 8.1 Labeling 8.1.1 Each compressor or unit shall have a durable nameplate fixed in a conspicuous position. The size and technical requirements of the nameplate shall comply with the provisions of GB/T 13306. The following information shall be marked on the nameplate: 8.1.1.1 Compressor a) Manufacturer's name and trademark; b) Product name and model; c) Main technical parameters (refrigerant, theoretical volume flow, maximum working pressure, speed, mass of the compressor); d) Product factory serial number; e) Date of manufacture of the product. 8.1.1.2 Compressor unit a) Manufacturer's name and trademark; b) Product name and model; c) Main technical parameters (refrigerant, nominal conditions, nominal refrigerating capacity, motor rated power, mass of the unit); d) Product factory serial number; e) Date of manufacture of the product. 8.1.2 The compressor or unit shall have signs indicating the operating status (such as the rotation direction of the compressor and oil pump, the fl.......
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