ISO 10437:2003 石油、石油化学、天然ガス産業—蒸気タービン—特殊用途 | 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 or foundation

3.3

axially split

split with the principal joint parallel to the shaft centreline

3.4

control mechanism

all of the equipment between the speed governor and the governor-controlled valve(s) (such as linkages, pilot valves, power servos, and so forth)

3.5

critical speed

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

3.6

design

equipment manufacturer's description of various parameters relevant to the equipment

Note 1 to entry: This terminology is for use only by the equipment manufacturer and is not intended to appear in the purchaser's specifications.

3.7

fail safe system

system which 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

3.8

field changeable

design feature that permits alteration of a function after the equipment has been installed

3.9

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.

3.10

general-purpose turbines

horizontal or vertical turbines used to drive equipment that is usually spared, is relatively small in size (power), or is in non-critical service

Note 1 to entry: General-purpose steam turbines are intended for applications where the inlet gauge pressure does not exceed 4 800 kPa (48 bar) (700 psi) and the inlet temperature does not exceed 400 °C (750 °F), and where the speed does not exceed 6 000 r/min.

3.11

governor-controlled valve

device that controls the flow of steam into or out of the turbine in response to the speed governor

3.12

hold-down bolts

mounting bolts

bolts that hold the equipment to the mounting plate or plates

3.13

hydrodynamic bearings

bearings that use the principles of hydrodynamic lubrication

Note 1 to entry: The bearing surfaces are oriented so that relative motion forms an oil wedge, or wedges, to support the load without shaft-to-bearing contact.

3.14

local

mounted on or near the equipment or console

3.15

maximum allowable speed

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

3.16

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 any specified operating conditions

3.17

maximum allowable working pressure

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 maximum allowable temperature

3.18

maximum continuous speed

highest speed at which the turbine, as built and tested, is capable of continuous operation, at any of the specified steam conditions

3.19

maximum exhaust casing pressure

highest exhaust steam pressure that the purchaser requires the casing to contain, with steam supplied at maximum inlet conditions

Note 1 to entry: The turbine casing is subjected to the maximum temperature and pressure under these conditions.

3.20

maximum exhaust pressure

highest exhaust steam pressure at which the turbine is required to operate continuously

3.21

maximum inlet pressure and temperature

highest inlet steam pressure and temperature conditions at which the turbine is required to operate continuously

3.22

maximum sealing pressure

highest pressure the seals are required to seal during any specified static or operating conditions and during startup and shutdown

3.23

minimum allowable speed

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

3.24

minimum exhaust pressure

lowest exhaust steam pressure at which the turbine is required to operate continuously

3.25

minimum inlet pressure and temperature

lowest inlet steam pressure and temperature conditions at which the turbine is required to operate continuously

3.26

normal operating point

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

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

3.27

observed

test or inspection for which the purchaser requires notification of the timing and may wish to attend

Note 1 to entry: This is not a hold point. The inspection or test is performed as scheduled, and if the purchaser or the purchaser's representative is not present, the vendor proceeds to the next step.

3.28

owner

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

3.29

panel

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

3.30

potential maximum power

approximate maximum power to which the turbine can be uprated at the specified normal speed and steam conditions when it is furnished with suitable (that is, larger or additional) nozzles and, possibly, with a larger governor-controlled valve or valves

3.31

pressure casing

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

3.32

purchaser

agency that issues the order and specification to the vendor

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

3.33

radially split

split with the principal joint perpendicular to the shaft centreline

3.34

rated power

greatest turbine power specified and its corresponding speed; it includes all the margin required by the specifications of the driven equipment

3.35

rated speed

100 % speed

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

3.36

relief valve set pressure

pressure at which a relief valve starts to lift

3.37

remote

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

3.38

separation margin

margin between a critical speed and the nearest required operating speed

3.39

shutdown set point

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

3.40

slow roll

speed recommended by the vendor (typically 400 r/min to 500 r/min) for warm-up and initial check of equipment integrity prior to full operation

3.41

special-purpose turbines

horizontal turbines used to drive equipment that are usually not spared and are used in uninterrupted continuous operation in critical service

Note 1 to entry: This category is not limited by steam conditions, power or turbine speed.

3.42

special tool

tool which is not a commercially available catalogue item

3.43

standby service

normally idle, or idling, piece of equipment that is capable of immediate automatic or manual startup and continuous operation

3.44

steam rate

quantity of steam required by the turbine per unit of power output measured at the output shaft of the turbine

3.45

turbine manufacturer

company that designs, manufactures, tests and provides service support for the turbine

3.46

trip speed

rotational speed at which the independent overspeed shutdown system operates to shut down a turbine

3.47

unit responsibility

responsibility for coordinating the technical aspects of the equipment and all auxiliary systems included in the scope of the order

Note 1 to entry: The technical aspects to be considered include, but are not limited to, such factors as the power requirements, speed, rotation, general arrangement, couplings, dynamics, noise, lubricant selection, instrumentation, piping, testing of components, conformance to specifications and material test reports.

3.48

vendor

supplier

agency that supplies the equipment in response to the order

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

3.49

witnessed

inspection or test that the purchaser attends

Note 1 to entry: A hold is applied to the production schedule and the inspection or test is carried out with the purchaser or purchaser's representative in attendance