API St 611:2008 pdf download

API St 611:2008 pdf download.General-purpose Steam Turbines for Petroleum, Chemical, and Gas Industry Services.
3.14
maximum continuous speed
The speed at least equal to 105 % of the highest speed required by any of the specified operatrng conditiona
3.15
maximum exhaust casing pressure
The highest exhaust steam pressure that the purchaser requires the casing to contain, with steam supplied at maximum inlet conditions.
NOTE The turbine will be sub$ected to the maximurti temperature and press&e under these conditions. The manufacturer’s classification determines the maxirium sentinel valve setting.
3.16
maximum exhaust pressure
The highest exhaust steam pressure at which the turbine is required to operate continuously.
3.17
maximum inlet pressure and temperature
The highest inlet steam pressure and temperature conditions at wtWch the turbine is required to operate continuously.
3.18
minimum allowable speed
The lowest speed at which the manufacturer’s design will permit continuous operation
319
minimum exhaust pressure
The lowest exhaust steam pressure at which the turbine is required to operate continuously.
3.20
mInimum Inlet pressure and temperature
The lowest Inlet steam pressure and temperature conditions at which the turbine is required to operate continuously.
3.21
mounting plates
A structure (baseplate or a mounting plate). with machined surfaces, to allow the mounting and accurate alignment of items of equipment, which may or may not operate.
NOTE Mactimed surfaces can be present on the upper and underside faces.
3.22
normal
Applies to the power, speed. and steam conditions at which the equipment will usualy operate.
NOTE These conditions are the ones at which the highest efficiency is desired.
3.23
normative
A requirement of the standard.
3.24
observed
An inspection or test where the purchaser is notified of the timing of the inspection or test and tne inspection or tesi is performed as scheduled regardless of whether or not the purchaser or his representative is present.
3.25
oil mist lubrication
Lubrication systems that employ oil mist produced by atomization in a central supply unit and transpOrted to the bearing housing by compressed air.
3.26
owner
The final recipient of the equipment who may delegate another agent as the purchaser of the equipment.
3.27
panel
An enclosure used to mount, display and protect gauges, (switches and transmitters) and oilier Instruments.
3.28
potential maximum power
The approximate maximum power to which the turbine can be up rated at the specified normal speed and steam conditions if it is furnished with suitable (larger or additional) nozzles and, possibly, with a larger governor-controlled valve or valves.
3.29
pressure casing
The composite of all stationary pressure-containing parts of the unit, including all nozzles and other attached parts.
3.30
purchaser
Owner or owner’s agent that issues the order and specification to the vendor.
3.31
pure oil mist lubrication (dry sump)
Systems in which the mist both lubricates the bearing and purges the housing, and there is no oil level in the sump.
3.32
purge oil mist lubrication (wet sump)
Systems in which the mist purges the bearing housing.
NOTE Bearing kbication by a conventional oil-bath. fhnger or ad ring lubrication system.
3.33
radially split
Joint split with the principal joint perpendicular to the shaft centerline.
3.34
rated power
The greatest turbine power specified and the corresponding speed.
NOTE It mcludes al of the margin required by the driven-equipment specifications.
3.35
remote
Refers to the location of a device if located away from the equipment or console, typically ii a control room.
3.36
shall
A normative (mandatory) requirement in order to conform to the specification.
3.37
special tool
A tool which is not a commercially available catalog item.
3.38
standby
A service state in which a piece of equipment that is normally idle or idling and is capable of immediate automatic or
manual start-up for continuous operation.
3.39
subplate
A plate usually embedded in a concrete foundation and used to accurately locate and aign a baseplate or mounting
plate.
NOTE Normally only the surface which interfaces with the baseplate or mountng plate is machined.
3.40
total indicator reading (TIR), also known as total indicated runout
The diference between the maximum and minimum readings of a dial indicator or similar device, monitoring a face or
cylindrical surface during one complete revolution of the monitored surface.
NOTE For a perfeclly cylindrical surface, the indicator reading implies an eccentricity equal to half the reading. For a perfectly flat face, the indicator reading gives an out- squareness equal to the reading. If the diameter in question is not perlectly cylindrical or flat, interpretation of the meaning of TIR is more complex and can represent ovality or lobing.