JB/T 9103.3-1999 Reciprocating Liquefied Petroleum Gas Compressors Technical Requirements
This Standard applies to the reciprocating liquefied petroleum gas compressors specified hereinafter: reciprocating liquefied petroleum gas compressors used in aviation and ground fuel systems, and reciprocating liquefied petroleum gas compressors used in other industrial and mining applications.
This Standard specifies the technical requirements and tests of reciprocating liquefied petroleum gas compressors related to mechanical design, operational reliability, safety and environmental protection.
Item 1 Scope
This Standard applies to the reciprocating liquefied petroleum gas compressors specified hereinafter: reciprocating liquefied petroleum gas compressors used in aviation and ground fuel systems, and reciprocating liquefied petroleum gas compressors used in other industrial and mining applications.
Item 2 Normative References
The following documents are essential to the application of this Standard. For dated references, only the editions with the dates indicated are applicable to this Standard. For undated references, the latest edition (including all amendments) are applicable to this Standard.
GB/T 10054-2003 Gases - Determination of Vapour Pressure - Rigid Vapour Vessel Method
GB/T 26347 Liquefied Petroleum Gas Devices. Metered Dispensers
JB/T 5496 Specifications of Mechanical Efficiency Test Bench
JB/T 7541 Specification of Safety Valve
JB/T 8472 Compressors and Pressure Reducing Stations Operating Conditions
JB/T 8473 More than or Equal 5KW Compressors Testing Methods
JB/T 9234 Safety Prevention Conditions of Petroleum Gas Compressors
Item 3 Terms and Definitions
For the purposes of this Standard, the terms and definitions specified in JB/T 8472 are applicable.
Item 4 Structual Design and Manufacturing
4.1 General
4.1.1 All basic materials of the reciprocating liquefied petroleum gas compressors shall meet the requirements of JB/T 8472.
4.1.2 The compressed liquefied petroleum gas delivered by the reciprocating liquefied petroleum gas compressor shall meet the applicable requirements of JB/T 8472.
4.1.3 It shall be clearly specified in the user’s manual that the reciprocating liquefied petroleum gas compressor must not be used for the transmission of combustible or explosive gas mixed with air.
4.1.4 On the external surface of the compressor body and the surface which contact with fuel and the surface of connection pieces of sealing interface, a protective layer of antirust material (such as paint, hot-dip zinc, etc) shall be coated.
4.2 Structural Characteristics and Connection
4.2.1 The compressor body consists of a cylinder, head, valve and a piston that is reciprocally in the cylinder. The connection parts consist of crankshaft, connecting rod, flywheel and a frame.
4.2.2 All parts which expand the volume shall be connected with the connection part through a dislocation sleeve to ensure reliable connection between the two parts.
4.2.3 All components must be reasonably matched, and the amount of clearance between the components and parts shall meet the requirements of JB/T 8472.
4.2.4 When the crankshaft is installed, the rotary axis shall be in vertical position.
4.3 Safety Devices
The reciprocating liquefied petroleum gas compressors should be equipped with safety devices in order to ensure the normal and safe operation of the compressor. The safety device should be installed according to JB/T 7541.
4.4 Test Requirements
4.4.1 Test for gas leakage
The sealing parts of the reciprocating liquefied petroleum gas compressor shall be detected for gas leakage by the pressure resistance test. The test gas for the gas leakage test may be either compressed liquefied petroleum gas or the same kind of compressed gas as the one to be used in operation. The test pressure shall be selected in the range of 1.2 to 1.7 times of the maximum working pressure. The test should be conducted for no less than 10 minutes. The pressure gradually decreases until no leakage is observed.
4.4.2 Test for air resistance
The air resistance flywheel of the reciprocating liquefied petroleum gas compressor shall be tested according to JB/T 5496. The measured value of the flywheel deformation shall meet the requirements of JB/T 8473.
4.4.3 Test for vibration
The vibration of the reciprocating liquefied petroleum gas compressor shall be measured according to JB/T 8473 and JB/T 9103.3-1999. The measured value of the vibration shall meet the requirements of JB/T 8473.
4.4.4 Test for temperature rise
The temperature rise test of the compressor shall be conducted according to JB/T 8472. The temperature rise test should also be repeated with different working pressures.
4.4.5 Test for liquid load
The liquid load test of the reciprocating liquefied petroleum gas compressor shall be conducted according to JB/T 8472.
4.4.6 Test for self-priming
The self-priming of the reciprocating liquefied petroleum gas compressor shall be tested in accordance with JB/T 8472.
Item 5 Operating Conditions and Limitations
5.1 Operation Conditions
5.1.1 For single-stage compression, the lower limit and upper limit pressure of the liquefied petroleum gas at intake and delivery shall be in accordance with GB/T 10054-2003.
5.1.2 The measured gas vapour pressure at intake shall not be greater than 85%; and the measured temperature shall not be lower than -15°C or higher than 50°C.
5.1.3 For multi-stage compression, a lower limit pressure of 0.3 MPa shall be selected for the intake of the last stage. The liquid load on the piston of the last stage shall be no more than 25%.
5.1.4 The operation environment of the compressor shall meet the requirements of JB/T 9234.
5.2 Maximum Working Speed
The maximum operating speed of the reciprocating liquefied petroleum gas compressor shall not exceed 25 m/s for the single-stage, and 33 m/s for multi-stage.
Item 6 Quality Control
6.1 Quality Control
6.1.1 The manufacturer shall set up a quality control system as prescribed in JB/T 8473.
6.1.2 The manufactured series of products shall be subject to inspection of static tests and trial operation.
6.1.3 The maintenance and adjustment of the reciprocating liquefied petroleum gas compressor shall comply with the requirements of the user’s manual.
6.1.4 The finished compressor shall be provided with a nameplate indicating the following information:
a) Manufacturers name;
b) Model number;
c) Rated power;
d) Rated speed;
e) Rated working pressure.
6.2 Protection Against Abnormal Operating Conditions
6.2.1 The safety devices of the reciprocating liquefied petroleum gas compressor shall be functioning correctly before acceptance.
6.2.2 During the test, the pressure and temperature of the inlet and outlet of the compressor must not exceed the specified value.
6.2.3 The temperature of the compressor body during operation shall not exceed the limits set by the manufacturer.
6.2.4 The pressure relief valve of the compressor shall be operated in accordance with the safety requirements when tested for gas leakage.
Item 7 Instructions for Use
7.1 User Manual
The users manual of the reciprocating liquefied petroleum gas compressor shall be provided by the manufacturer, and shall include the following contents:
a) Technical features of the compressor;
b) Detailed introduction of the structure and performance parameters of the compressor;
c) Expression of standard conditions of the compressor;
d) Instruction for installation, commission and operation of the compressor;
e) Requirements and functions of safety protection devices;
f) Detailed description of fault diagnosis, inspection and maintenance of the compressor;
g) Related precautions and accessory information.
