JB/T 12843-2016 English PDF (JBT12843-2016)

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JB/T 12843-2016: Centrifugal refrigerant compressors
JB/T 12843-2016
JB
MECHANICAL INDUSTRY STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
ICS 27.200
J 73
Filing No.: 55150-2016
Centrifugal refrigerant compressors
ISSUED ON: APRIL 05, 2016
IMPLEMENTED ON: SEPTEMBER 01, 2016
Issued by: Ministry of Industry and Information Technology of PRC
Table of Contents
Foreword ... 4
1 Scope ... 5
2 Normative references ... 5
3 Terms and definitions ... 6
4 Type and basic parameters ... 8
4.1 Type ... 8
4.2 Normal working pressure and flow range of the compressor (unit) ... 8
4.3 Nominal operating conditions ... 8
5 Requirements ... 8
5.1 General requirements ... 8
5.2 Safety requirements ... 9
5.3 Performance requirements ... 9
6 Test ... 11
6.1 General requirements for the test ... 11
6.2 Test methods ... 12
7 Inspection rules ... 14
7.1 Exit-factory inspection ... 14
7.2 Sampling inspection ... 14
7.3 Type inspection ... 14
8 Marking, packaging, transportation, storage ... 15
8.1 Marking ... 15
8.2 Packaging ... 16
8.3 Transportation and storage ... 17
Appendix A (Informative) Requirements for the layout of pressure, temperature
measuring points and pipeline components for the refrigeration (heating) capacity test
of the compressor (unit) ... 18
A.1 Overview ... 18
A.2 Requirements for the layout of suction and exhaust pressure and temperature
measuring points ... 18
A.3 Requirements for the layout of straight sections of suction and exhaust pipes ... 19
Centrifugal refrigerant compressors
1 Scope
This standard specifies the terms and definitions, types and basic parameters,
requirements, tests, inspection rules, marking, packaging, transportation and storage of
centrifugal refrigerant compressors and centrifugal refrigerant compressor units.
This standard applies to centrifugal refrigerant compressors (hereinafter referred to as
compressors) and centrifugal refrigerant compressor units (hereinafter referred to as
compressor units) for air conditioning purposes. Centrifugal refrigerant compressors
and centrifugal refrigerant compressor units for other purposes shall refer to this
standard.
2 Normative references
The following documents are essential to the application of this document. For the dated
documents, only the versions with the dates indicated are applicable to this document;
for the undated documents, only the latest version (including all the amendments) is
applicable to this standard.
GB/T 191 Packaging - Pictorial marking for handling of goods
GB/T 5773 The method of performance test for positive displacement refrigerant
compressors
GB 6388 Transport package shipping mark
GB 9237 Mechanical refrigerating systems used for cooling and heating - Safety
requirements
GB/T 9239.1-2006 Mechanical vibration - Balance quality requirements for rotors
in a constant (rigid) state - Part 1: Specification and verification of balance
tolerances
GB/T 13306 Plates
GB/T 18430.1 Water chilling (heat pump) packages using the vapor compression
cycle - Part 1: Water chilling (heat pump) packages for industrial and commercial
and similar application
GB/T 19410 Screw refrigerant compressors
prescribed procedures (or the agreement between the user and the manufacturer).
5.2 Safety requirements
The safety requirements of the compressor (unit) shall comply with the provisions of
GB 9237.
5.3 Performance requirements
5.3.1 Strength
5.3.1.1 Compressor housing and other pressure-bearing parts shall be subjected to
strength tests. During the strength tests, there shall be no leakage or abnormal
deformation in all parts.
5.3.1.2 When the compressor housing and other pressure-bearing parts are subjected to
strength tests, the requirements are as follows:
- If the test is a type inspection, the compressor housing and other pressure-bearing
parts shall be subjected to a burst test of not less than 3 times the design pressure;
- If the test is a sampling inspection, the compressor housing and other pressure-
bearing parts shall be subjected to a hydraulic test of not less than 1.50 times the
design pressure or a gas pressure test of 1.25 times the design pressure;
- If the test is an exit-factory inspection, at least one sample of the basic model
compressor housing and other pressure-bearing parts shall be subjected to a burst
test of not less than 3 times the design pressure each year. After the test is passed,
the strength test of each compressor (unit) for exit-factory inspection shall only be
subjected to a hydraulic test of 1.25 times the design pressure or a gas pressure test
of 1.15 times the design pressure for the compressor housing and other pressure-
bearing parts.
5.3.2 Air tightness
When conducting air tightness test, the requirements are as follows:
- When the leak detection medium is dry, clean air or nitrogen, the compressor (unit)
or compressor housing and other pressure parts shall be leak-free during the test;
- When the leak detection medium is other test gases, the single-point leakage rate
of the compressor (unit) or compressor housing and other pressure parts during the
test shall not be greater than 14 g/a.
5.3.3 Operation
The compressor (unit) shall be tested for operation; its operation shall be stable, without
abnormal noise and severe vibration; the adjustment device shall be flexible and correct;
the pressure, input power, temperature shall not fluctuate abnormally; the friction parts
shall not have abnormal temperature rise. The unit assembled from the compressor that
has passed the operation test does not need to be tested for operation.
5.3.4 Insulation resistance
The insulation resistance between the live parts of the compressor (unit) and the non-
live parts that may be grounded: the cold insulation resistance of the motor with a rated
voltage below 1000 V shall not be less than 50 MΩ; the cold insulation resistance of
the motor with a rated voltage of 1000 V ~ 6600 V shall not be less than 200 MΩ; the
cold insulation resistance of the motor with a rated voltage greater than 6600 V shall
not be less than 500 MΩ.
5.3.5 Impeller dynamic balance
The dynamic balance level of the impeller shall comply with the requirements specified
by the manufacturer's design or the agreement between the supplier and the buyer.
5.3.6 Impeller overspeed
The permanent deformation of the key parts of the impeller (such as the shaft hole, the
inlet seal ring, the outer diameter of the impeller), before and after the test, shall comply
with the requirements specified by the manufacturer's design or the agreement between
the supplier and the buyer.
5.3.7 Refrigeration (heating) capacity
The measured refrigeration (heating) capacity of the compressor (unit) shall not be less
than 95% of the nominal refrigeration (heating) capacity.
5.3.8 Input power
The measured input power of the compressor (unit) shall not be greater than 110% of
the nominal input power.
5.3.9 Refrigeration (heating) performance coefficient
The measured refrigeration (heating) performance coefficient of the compressor (unit)
shall not be less than 95% of the indicated value.
5.3.10 Vibration
The measured vibration value of the compressor (unit) shall not be greater than the
vibration limit indicated by the manufacturer.
5.3.11 Partial load operation
condition parameters, the measuring instruments and accuracy shall comply with the
provisions of GB/T 5773.
6.1.9 The refrigeration capacity t...