ISO 10440-1:2007 石油、石油化学、天然ガス産業—ロータリータイプの容積式コンプレッサー—パート1：プロセスコンプレッサー | ページ 6

3.1

alarm point

preset value of a measured parameter at which an alarm is actuated to warn of a condition that requires corrective action

3.2

anchor bolts

bolts used to attach the mounting plate to the support structure (concrete foundation or steel structure)

Note 1 to entry: Refer to 3.14 for definition of hold-down bolts.

3.3

axially split

split with the principal joint parallel to the shaft centreline

3.4

baseplate

structure providing support and mounting surfaces for one or more pieces of equipment

3.5

certified point

point at which the vendor certifies that the performance is within the tolerances stated in the standard, usually the normal operating point

3.6

critical speed

shaft rotational speed at which the rotor-bearing support system is in a state of resonance

3.7

depressurization valve

blowdown valve

valve, external to the compressor, used to relieve the gas pressure within the compressor or compressor package to atmospheric or flare pressure

3.8

dry screw compressor

helical-lobe rotary compressor that uses no liquid for sealing the rotor clearances and driving the non-coupled rotor

Note 1 to entry: The rotor-to-rotor relationship is maintained by timing gears on each rotor and the non-coupled rotor is driven by the coupled rotor through the timing gears.

Note 2 to entry: No rotor-to-rotor contact occurs in the dry screw compressor.

3.9

fail-safe

system that causes the equipment to revert to a permanently safe condition (shutdown and/or depressurized) in the event of a component failure or failure of the energy supply to the system

3.10

flooded screw compressor

helical-lobe rotary compressor with a lubricant (compatible with the process gas) injected into the rotor area after the closed thread position of the rotor

Note 1 to entry: This lubricant helps seal rotor clearances and establishes an oil film between the rotors. One rotor drives the other in the absence of a timing gear.

3.11

gas/oil separator

pressure-containing device, usually a vessel, used to separate entrained oil from the process gas

3.12

gauge board

bracket or plate used to support and display gauges, switches and other instruments

Note 1 to entry: A gauge board is open and not enclosed

Note 2 to entry: A gauge board is not a panel. A panel is an enclosure. Refer to 3.31 for the definition of a panel.

3.13

general-purpose application

application that is usually spared or is in non-critical service

3.14

hold-down bolts

mounting bolts

bolts holding the equipment to the mounting plate

3.15

hydrodynamic bearings

bearings that use the principles of hydrodynamic lubrication, where bearing surfaces are oriented such that relative motion forms an oil wedge or wedges to support the load without shaft-to-bearing contact

3.16

inlet volume flow

flow rate expressed in volume flow units at the conditions of pressure, temperature, compressibility and gas composition, including moisture content, at the compressor inlet flange

Note 1 to entry: Inlet volume flow is a specific example of actual volume flow. Actual volume flow is the volume flow at any particular location such as interstage or compressor discharge. Actual volume flow should not be used interchangeably with inlet volume flow.

3.17

inlet separator

device, usually a filter or vessel, used to separate entrained solid and liquid contaminants from the process gas inlet steam

3.18

maximum allowable differential pressure

highest differential pressure that can be permitted in the compressor under the most severe operating conditions of minimum suction pressure and discharge pressure equal to the relief-valve setting

3.19

maximum allowable speed

highest rotational speed of the power-input rotor at which the manufacturer’s design permits continuous operation

3.20

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 maximum operating pressure

3.21

maximum allowable working pressure

MAWP

maximum continuous pressure 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 maximum operating temperature

3.22

maximum continuous speed

highest rotational speed of the power-input rotor at which the machine, as built and tested, is capable of continuous operation with the specified fluid at any of the specified operating conditions

3.23

maximum power

highest power the compressor and any shaft-driven appurtenances require for any of the specified operating conditions, including the effect of any equipment (e.g. pulsation suppression devices, process piping, intercoolers, after-coolers and separators) furnished by the compressor vendor

Note 1 to entry: Deviations from the specified conditions, such as relief-valve set pressure, are excluded from maximum power.

3.24

maximum sealing pressure

highest pressure at which the seals are required to seal during any specified static or operating condition and during start-up and shutdown

3.25

minimum allowable speed

lowest rotational speed of the power-input rotor at which the manufacturer's design permits continuous operation

3.26

minimum allowable temperature

lowest temperature for which the manufacturer has designed the equipment or part thereof

3.27

mounting plate

device used to attach equipment to concrete foundations

Note 1 to entry: A mounting plate can be a soleplate, a baseplate or a combination of both.

3.28

normal operating point

point at which usual operation is expected and optimum efficiency is desired, usually the certified point

3.29

observed inspection

observed test

inspection or test where the purchaser is notified of the timing of the inspection or test and the inspection or test is performed as scheduled if the purchaser or his representative is not present

Note 1 to entry: Refer to 3.58 for the definition of a witnessed test.

3.30

owner

final recipient of the equipment who may delegate another agent as the purchaser of the equipment

3.31

panel

enclosure used to mount, display and protect gauges, switches and other instruments

Note 1 to entry: A panel is not a gauge board. A panel is enclosed and not open. Refer to 3.12 for the definition of a gauge board.

3.32

pocket-passing frequency

frequency at which the gas is discharged from the rotor lobes into the discharge port

Note 1 to entry: Pocket-passing frequency, expressed in hertz, is calculated by multiplying the rotor rotational speed, expressed in revolutions per minute, by the number of lobes on that rotor and dividing the product by 60.

3.33

pressure casing

composite of all stationary pressure-containing parts of the unit, including all nozzles and other attached parts

3.34

pressure design code

recognized pressure vessel standard specified or agreed by the purchaser

3.35

purchaser

agency that issues the order and specifications to the vendor

Note 1 to entry: The purchaser can be the owner of the plant in which the equipment is to be installed or the owner’s appointed agent.

3.36

radially split

split with the principal joint perpendicular to the shaft centreline

3.37

rated speed

100 % speed

highest rotational speed of the power input rotor required to meet any of the specified operating conditions

3.38

relief-valve set pressure

pressure at which a relief valve starts to lift

3.39

remote

located away from the equipment or the console, typically in a control house

3.40

required capacity

largest inlet volume required by the specified operating conditions

3.41

rotor

rotating male or female assembly, including rotor body, shaft and shrunk-on sleeves (if furnished)

3.42

rotor body

helical profile section on or integral with the shaft

3.43

rotor set

set consisting of both male and female rotors and, for dry screw compressors, including timing gears and thrust collars

3.44

seal buffer gas

clean gas supplied to the process (inboard) side of a seal

3.45

seal barrier gas

clean gas supplied to the area between the seals of a dual seal arrangement at a pressure higher than the process pressure

3.46

separation seal gas

supply of inert gas or air fed into the region between the seal and the shaft bearing or between the bearing housing and atmosphere

3.47

settle-out pressure

highest pressure which the compressor experiences when not running and after equilibrium has been reached

Note 1 to entry: This can be a function of ambient temperature, relief-valve setting and piping-system volume.

3.48

shutdown point

preset value of a measured parameter at which automatic or manual shutdown of the system or equipment is required

3.49

slide valve

device integral to the compression chamber for varying the volumetric flow through a rotary screw compressor

3.50

soleplate

plate grouted to the foundation, with a mounting surface for equipment or for a baseplate

3.51

special-purpose application

application for which the equipment is designed for uninterrupted continuous operation in critical service and for which there is usually no installed spare equipment

3.52

special tool

tool which is not a commercially available catalogue item

3.53

standby

normally idle or idling piece of equipment that is capable of immediate automatic or manual start-up and continuous operation

3.54

thermal relief valve

valve for relieving pressure caused by thermal expansion of liquid within a closed volume

3.55

trip speed

rotational speed of the power-input rotor at which the independent emergency overspeed system operates to shut down a prime mover

Note 1 to entry: For the purposes of this part of ISO 10440, the trip speed of alternating-current electric motors, except variable-frequency drives, is the speed corresponding to the synchronous speed of the motor at maximum supply frequency.

3.56

unit responsibility

responsibility for coordinating the technical aspects of the equipment and all auxiliary systems included in the scope of the order, including responsibility for reviewing such factors as the power requirements, speed, rotation, general arrangement, couplings, dynamics, noise, lubrication, sealing system, material test reports, instrumentation, piping, conformance to specifications and testing of components

3.57

vendor

supplier

agency that supplies the equipment

Note 1 to entry: The vendor can be the manufacturer of the equipment or the manufacturer’s agent and normally is responsible for service support.

3.58

witnessed inspection

witnessed test

inspection or test where the purchaser is notified of the timing of the inspection or test and a hold is placed on the inspection or test until the purchaser or his representative is in attendance