API STD 611:2008 pdf download

API STD 611:2008 pdf download.General-purpose Steam Turbines for Petroleum, Chemical, and Gas Industry Services.
3.4
critical speed
A shaft rotational speed at which the rotor-bearing support system is in a state of resonance.
3.5
design
A term that may be used by the equipment manufacturer to describe various parameters sucti as design power.
design temperature, or design speed.
NOTE Ttss termlooiogy should be used only by the equipmer manufacturer and not in the pL%chaser’s specifications.
3.6
gauge board
A bracket or plate used to support and display instrumentation.
NOTE Agaugeboard,sopenandnotenclosedAgaugeboardisnotapanel.
3.7
hold down bolts (mounting bolts)
Bolts holding the equipment to the mounting plate.
NOTE Refer to 3.1 for definhon of erichor bolts
3.8
HVOF
A h,gh velocity oxygen fuel process.
3.9
hydrodynamic bearings
Bearings that use the principles of hydrodynamic lubrication.
NOTE The bearing surfaces are oriented so that relative motion forms a ot wedge or wedges to support the load without shaft- to-bearing contact.
3.10
local
Refers to the location of a device when mounted on or near the equipment or console
3.11
maximum allowable sp.ed
The highest speed at which the manufacturer’s design will permit continuous operation.
NOTE The maxanum allowable speed is usuaty set by rotor stress values.
3.12
maximum allowable temperature
The maxnum continuous temperature for which the manufacturer has designed the equipment (or any part to which the term is referred) when operating at the maximum allowable working pressure.
3.13
maximum allowable working pressure
The maximum continuous pressure for which the manufacturer has designed the equipment (or any part to which the term is referred) when operating at the maximum allowable temperature.
3.14
maximum continuous speed
The speed at least equal to 105 % of the highest speed required by any of the specified operating conditions.
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 tiabine will be subjected to the maximLaii temperature and presswe under these conditions. The manufacturer’s classification determines the maxrnum sentinel valve sethng
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 wtch the turbine is required to operate continuously.
3.18
minimum allowable speed
The lowest speed at which the manufacturer’s design will pemlit continuous operation
3.19
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 turbme 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 Mad,ined surfaces can be present on the uppe and underside faces.
3.22
normal
Applies to the power, speed, and steam conditions at which the equipment will usually operate.
NOTE These oonditions are the ones at whid’i the highest efficiency is desired.
3.23
normative
A requirement of the standard.
3.24
observed
An inspection or lest wtiere the purchaser is notified of the timing of the inspection or test and the inspection or test 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.
326
owner
The final recipient 04 the equipment who may delegate another agent as the purchaser 04 the equipment.
3.27
panel
An enclosure used to mount, display and protect gauges, (switches and transmitters) and other instruments.
328
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 furntshed with suitable (larger or additional) nozzles and, possibly, with a larger governor-controlled valve or valves.
3.29
pressure casing
The composite of aN stationary pressure-containing parts of the unit, including all nozzles and other attached parts
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 lubncates 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 kl,flcation by a conventional oil-bath. finger or od nng lubrication steni.
3.33
radially split
Joint split with the principal joint perpendicular to the shaft centerline.