ISO 13631-2002 pdf free download.Petroleum and natural gas industries — Packaged reciprocating gas compressors.
5.4 Sound pressure level
Control of the sound pressure level of all equipment furnished shall be the joint effort of the purchaser and the vendor. If specified, the equipment furnished by the vendor shall not exceed the maximum sound pressure level required by the purchaser.
5.5 Electrical area classification
Motors, electrical components and electrical installations shall be suitable for the area classification (zone) specified by the purchaser, shall meet the requirements of IEC 60079 and other standards specified by the purchaser and shall comply with all applicable local codes and regulations.
5.6 Package installation
The purchaser shall specify the site conditions (altitude, ambient temperature, etc.), and whether the installation is indoors (heated or unheated) or outdoors (with or without a roof) and the weather or environmental conditions in which the equipment must operate (including maximum and minimum temperatures, unusual humidity or dust problems). The unit and its auxiliaries shall be suitable for operation in these specified conditions. The purchaser shall specify dimensional limitations, if any.
5.7 Torsional analysis
The vendor shall provide a torsionally sound system and perform an analysis to demonstrate this. When specified, a torsional analysis report shall be provided, and the vendor shall be responsible to coordinate with the compressor and prime-mover manufacturers to produce such a report.
6 Compressor
6.1 General
6.1.1 Manufacturer’s rated capacity The compressor shall be sized to handle not less than the required capacity with the gas composition, suction pressures, suction temperatures, discharge pressures and site conditions specified by the purchaser. The number of stages of compression shall accommodate pressure limitations and gas additions or withdrawals as specified. The package design shall also allow for all pressure drops through the separators, pulsation suppression devices (if any), coolers and piping from the inlet flange to the outlet flange of the package.
6.1.2 Performance calculations The vendor shall use the specified values of mass flowrate, the specified gas composition and the gas conditions to calculate average molar mass, ratio of specific heats (c p /c V ), compressibility factors (z) and inlet volume flowrate. The compressor vendor shall indicate his values on the data sheets with the proposal and use them to calculate performance data.
6.1.3 Compressor size
If specified, the compressor shall be furnished with cylinders which, when operating at the specified operating condition(s), shall as far as practical, load the gas engine to the limit specified in 8.2.1 or electric motor to the limit specified in 8.3.2. Compressors driven by induction motors shall be sized at the motor operating speed.ISO 13631 pdf download.