ISO 13631:2002 石油および天然ガス産業—パッケージ化された往復ガスコンプレッサー | ページ 6

3.1

capacity

quantity of gas taken into the compressor at the specified inlet conditions, compressed and delivered at the specified discharge pressure

Note 1 to entry: It is expressed in units of mass flow or standard volume flow.

Note 2 to entry: The capacity of a compressor does not include any gas that leaks out of the compressor during the compression process, nor any air that leaks into a compressor used as a vacuum pump.

3.2

combined rod load

algebraic sum of gas load and inertia force on the crosshead pin

3.2.1

gas load

force resulting from differential gas pressure acting on the piston differential area

3.2.2

inertia force

force resulting from the acceleration of reciprocating mass

Note 1 to entry: Inertia force with respect to the crosshead pin is the summation of the products of all reciprocating masses (piston and rod assembly, and crosshead assembly including pin) and their respective accelerations.

3.3

manufacturer's rated capacity

capacity of the compressor used by the manufacturer to assign its size

3.4

maximum allowable continuous combined rod load

highest combined rod load at which none of the forces in the running gear and the compressor frame exceeds the values that the compressor manufacturer's design permits for any component for continuous operation

Note 1 to entry: Running gear includes the piston, piston rod, crosshead assembly, connecting rod, crankshaft, bearings, etc.

3.5

maximum allowable speed

highest speed at which the manufacturer's design permits continuous operation

3.6

maximum allowable temperature

maximum continuous temperature for which the manufacturer has designed the equipment (or any part to which the term is referred) when handling the specified fluid at the specified pressure

3.7

maximum allowable working pressure

MAWP

maximum continuous gauge pressure for which the compressor manufacturer has designed the equipment (or relevant part thereof) when handling the specified fluid at the specified temperature

3.8

minimum allowable speed

lowest speed at which the manufacturer's design permits continuous operation

3.9

normal operating point

point at which usual operation is expected and optimum efficiency is desired

Note 1 to entry: This is usually that point at which the manufacturer certifies that performance is within the tolerances stated in this International Standard.

3.10

rated discharge pressure

highest pressure required to meet the conditions specified by the purchaser for the intended service

3.11

rated power

maximum power required of the compressor plus any shaft-driven appurtenances for any of the specified operating conditions

Note 1 to entry: The rated power includes the effect of equipment such as pulsation suppression devices, process piping, intercoolers and separators. Driver and transmission losses are not included in the rated power of the compressor. Losses incurred in outboard bearings (e.g. as used to support large flywheels) are included.

3.12

rated speed

highest speed required to meet any of the specified operating conditions

3.13

required capacity

capacity specified by the purchaser to meet process conditions, with no negative tolerance (NNT) permitted

3.14

rod reversal

change in direction of force in the piston rod loading (tension to compression or vice-versa), which results in a load reversal at the crosshead pin during each revolution

3.15

standard flow

flowrate at an absolute pressure of 0,101 3 MPa (1,013 bar) and a temperature of 0 °C

Note 1 to entry: It is expressed in units of volume flow.