17-SAMSS-502-异步电机500马力以上

Previous Issue: 10 March 2012 Next Planned Update: 10 March 2017Revised paragraphs are marked in the right marginPage 1 of 28 Primary contact: Ali, Salah Ali on +966-3-8809660Materials System Specification17-SAMSS-50210 June 2012 Form-Wound Induction Motors 500 HP and AboveDocument Responsibility: Motors and Generators Standards CommitteeSaudi Aramco DeskTop StandardsTable of ContentsA Scope (2)B Conflicts and Deviations (2)C References (2)D Qualification (4)E Modifications to Industry Standard (4)Data Sheet for 17-SAMSS-502 (21)Next Planned Update: 10 March 2017 Form-Wound Induction Motors 500 HP and AboveA ScopeThis Specification, together with the Data Sheets, defines the mandatory requirementsfor form-wound squirrel-cage induction motors rated 4 kV and above, and 370 kW(500 HP) and above.B Conflicts and DeviationsB.1 If there are any conflicts between this Specification and associated purchasing,project or engineering documents, this specification shall take precedence.For any deviation and exception, an approved Waiver has to be included withthe purchasing documents.B.2 Any conflicts between this Specification and other Mandatory Saudi AramcoEngineering Requirements (MSAERs*) or referenced industry standards shall beidentified to the Company or Buyer Representative who will request theManager, Consulting Services Department of Saudi Aramco, Dhahran to resolvethe conflict.* Examples of MSAERs are Saudi Aramco Materials System Specifications(SAMSSs), Engineering Standards (SAESs) and Standard Drawings (SASDs).B.3 Direct all requests to deviate from this Specification in writing to the Companyor Buyer Representative, who shall follow internal company waiver procedure.B.4 The designation “Commentary” is used to label a sub-paragraph that containscomments that are explanatory or advisory. These comments are not mandatory,except to the extent that they explain mandatory requirements contained in thisSAMSS.C ReferencesThe following is a summary of all the documents which have been mentioned withinthis Specification. The specific part(s) of these documents which are applicable havebeen identified throughout this Specification.C.1 Saudi Aramco ReferencesSaudi Aramco Materials System Specifications17-SAMSS-503Severe Duty Totally Enclosed Squirrel CageInduction Motors to 500 HP32-SAMSS-013Lubrication, Shaft Sealing and Control Oil Systemsfor Special Purpose ApplicationsNext Planned Update: 10 March 2017 Form-Wound Induction Motors 500 HP and Above 34-SAMSS-625Machinery Protection SystemsSaudi Aramco Engineering StandardsSAES-M-001Structure Design Criteria for Non-BuildingStructureSAES-M-100Saudi Aramco Building CodeSAES-Q-007Foundation and Supporting Structure for HeavyMachineryC.2 Industry Codes and StandardsAmerican Petroleum InstituteAPI STD 541 Form-Wound Squirrel Cage Induction Motors-500 Horsepower and LargerAPI STD 614 Lubrication, Shaft-Sealing, and Control-Oil Systemsand AuxiliariesAPI STD 670 Machinery Protection SystemsInternational Electrotechnical CommissionIEC 60034 Rotating Electrical MachinesIEC 60072-1 Dimensions and Output Ratings for RotatingElectrical MachinesIEC 60894 Guide for a Test Procedures for the Measurement ofLoss Tangent of Coils and Bars for MachinesWindingsIEC 60529 Degrees of Protection Provided by Enclosures Institute of Electrical and Electronics Engineers, Inc.IEEE 112 Test Procedures for Polyphase Induction Motorsand GeneratorsIEEE 286 Recommended Practice for Measurement of Power-Factor Tip-Up of Rotating Machinery Stator CoilInsulationIEEE 1776 Recommended Practice for Thermal Evaluation ofUnsealed or Sealed Insulation Systems for ACElectric Machinery Employing Form- WoundPre-Insulated Stator Coils for Machines Rated15000 V and BelowNext Planned Update: 10 March 2017 Form-Wound Induction Motors 500 HP and Above ANSI/IEEE C62.11 Metal-Oxide Surge Arresters for AlternatingCurrent Power SystemsNational Electrical Manufacturer's AssociationNEMA MG 1 Motors and GeneratorsNEMA 250 Enclosures for Electrical Equipment (1000 VoltsMaximum)International Organization for StandardizationISO 1680 Test Code for the Measurement of Airborne NoiseEmitted by Rotating Electrical MachinesISO 12944-2 Paints and Varnishes - Corrosion Protection ofSteel Structures by Protective Paint SystemsD QualificationInduction motors shall be supplied by vendors qualified by experience in manufacturing the units proposed. To qualify, the vendor or his licensee must have manufactured, atthe proposed manufacturing location, at least 10 units with identical or equivalentperformance characteristics (speed, power, voltage, enclosure/cooling). These motorsmust have been in service for at least 5 years and must be performing satisfactorily.Details and location of operation shall be provided to Saudi Aramco upon request.In addition, the vendor shall disclose each proposed design, manufacturing procedure,component, or assembly that does not have at least 2 years satisfactory field operatingexperience in similar service.E Modifications to Industry StandardThe following paragraph numbers refer to API STD 541, Fourth Edition, June 2004,Form-Wound Squirrel Cage Induction Motors-500 Horsepower and Larger which ispart of this Specification. The text in each paragraph below is an addition toAPI STD 541 unless it is noted as an exception. Paragraph numbers not appearing inAPI STD 541 are new paragraphs to be inserted in numerical order. Paragraph numbers appearing in API STD 541 but not in this document have not been modified.When the phrase “unless otherwise specified” is used in this document, it shall be taken to mean unless otherwise specified by the Saudi Aramco Company Representative orSaudi Aramco Buyer.Next Planned Update: 10 March 2017 Form-Wound Induction Motors 500 HP and AboveSection 1 General1.2 Alternative DesignsAll deviations from this Specification shall be separately listed by theVendor in his quotation and shall refer to the relevant paragraph number.Deviations shall be handled as outlined in Section B, above.1.3 Equivalent metric dimensions, fasteners and flanges may be used, as inIEC 60072-1.1.4 Conflicting Requirements(Exception) See Section B, above.1.5 Definition of Terms1.5.10 A service factor of 1.0 is specified.Section 2 Basic Design2.1 General2.1.1 It is recognized that self-lubricated systems will require a shutdown foran oil change, and that Exd machines may require a more frequentmaintenance interval.2.1.2 Unless otherwise specified, equipment will be installed outdoors in adesert area with relative humidity from zero to 100% (condensing) andwill be subject to wind blown dust and wind blown rain.Commentary Notes:Metal temperatures can reach 70°C (158°F) when exposed to direct solarradiation. This is assuming that the motor will be located outdoors unlessotherwise specified.The motor painting system shall be suitable for ISO 12944-2 corrosioncategory C4. If severe corrosive area or offshore is specified, the motorpainting system shall be suitable for corrosion category C5-M.2.1.3(Addition) The weighted average sound pressure level of the motor shallnot exceed 85 dBA at distance of 1 meter for 4 pole motors and above and90 dBA at a distance of 1 meter for 2 pole motors determined inaccordance with NEMA MG 1, part 9, or ISO 1680 and IEC 60034-9 withthe motor operating under the conditions specified in this paragraph.Next Planned Update: 10 March 2017 Form-Wound Induction Motors 500 HP and Above2.1.11 Unless otherwise specified, the minimum quantity of special tools shallbe one set per purchase order or contract.2.1.13 (Exception) If, during the warranty period, while operating at theconditions specified on the Data Sheet, the motor fails to meet thespecified performance, the Vendor shall be responsible for performingany corrective action required.2.2 Electrical Design2.2.1.1 NEMA standard ratings are not required.2.2.3 Starting and Running Conditions2.2.3.1 The motor shall be capable of starting and accelerating the driven load tooperating speed with 80% of the rated voltage at the motor terminals,allowing for the natural rise of the voltage as the motor accelerates.Purchaser will provide load speed vs. torque curve and load Wk² whenmotor is purchased separately from driven equipment.Exception:Unless specified otherwise by Saudi Aramco or the motor is controlledwith an Adjustable Speed Drive.2.2.4.2 Speed sensors shall be provided if accelerating time is greater than safestall time. The vendor shall provide no less than two consecutive startswith the motor coasting to rest between starts.2.3 Winding and Insulation Systems2.3.1 All motors shall have an epoxy base, polyesterimide base orcombinations thereof. Temperature rise shall be measured by slot-embedded resistance temperature detectors (RTD).2.3.3 Stator insulation system shall be service proven and shall have beensubjected to thermal evaluation in accordance to IEEE 1776 orIEC 60034-18. Also, a proven system is acceptable with the approval ofMotor & Generators Standards Committee Chairman.2.4 Mechanical Design2.4.1 Enclosures2.4.1.1 General Requirements2.4.1.1a (Exception) Fiber-reinforced materials shall only be used internally.Next Planned Update: 10 March 2017 Form-Wound Induction Motors 500 HP and Above2.4.1.1c When specified as being for use offshore or in a severe corrosionenvironment, AISI 316 series stainless steel shall be used for theenclosure's bolts, studs, and other fastening devices up to size M12.For sizes above M12 to M36, galvanized (zinc-chromate treatment)hardware shall be used. For larger sizes, black phosphate coatedhardware shall be used.Exception: for Exd machines the manufacturer shall use his standard.2.4.1.2 Motor Enclosures and Corresponding NEMA Specifications2.4.1.2.1 (Exception) Only totally enclosed motors shall be provided. TEWAC(or IC equivalent code) may be provided for motors rated 23 MVA andabove, if suitable cooling water is available. Note that IC416 and IC516are also acceptable.2.4.1.2.3c Exception: Exd motors2.4.1.2.3f If auxiliary cooling fans are used for TEAAC motors, the main motorsshall meet the following requirements:1) Auxiliary cooling fan motors shall meet the requirements of17-SAMSS-503.2) More than one fan shall be used. Fan motors shall be easilyaccessible for maintenance and it shall be possible to remove andreplace cooling fan motors with the main motor operating thedriven equipment.3) For motors 6000 kW (8000 HP) or greater, the heat exchangerdesign shall be such that the main motor meets all load andtemperature rise requirements with any one auxiliary cooling fansout of service.2.4.1.2.3g Air-to-air heat exchangers for TEAAC (or IC equivalent code) motorsshall be designed for 105 % of calculated losses including auxiliarymotor fan losses (if applicable). The 5 % allowance is to compensate forplugging or fouling.2.4.1.2.4 If the maximum inlet water temperature is different than 32C the motorvendor shall provide the expected flow rate and temperature rise of thecooling water based on the specified maximum inlet water temperature.2.4.2 Frame and Mounting Plates2.4.2.1 (Addition) The motor and driven machine vendor shall base the motorNext Planned Update: 10 March 2017 Form-Wound Induction Motors 500 HP and Above design on a foundation that meets SAES-M-001, SAES-M-100 andSAES-Q-007.(Addition) This paragraph is also applicable to Adjustable SpeedDrive ASD motors.2.4.2.6 Motor mounting plate arrangement shall be such that the complete motorassembly can be removed intact for repair without any on-sitedismantling. If bearing pedestals are baseplate mounted then it must bepossible to remove the complete motor/baseplate unit as one assembly.Soleplates shall be provided when the motor is mounted on a separatefoundation as indicated on the datasheet, and soleplates shall bepermanently grouted in place.(Addition) The motor frame mounting plate (sole or base) shall be flat onthe foundation sole plate. If footplates are provided, the in-between footdeflection shall comply with SAES-M-001.2.4.2.14 Unless otherwise specified, minimum quantities of special mechanismsfor lifting, when required, shall be one per purchase order.2.4.5 Rotating Element2.4.5.1 General2.4.5.1.1 A fatigue life assessment shall be conducted to demonstrate a 5000 startrequirement for 5000 HP motors and above.All shaft repair procedures shall be submitted through the Company orBuyer Representative for review and approval by the Coordinator,Materials Engineering & Corrosion Control Division, ConsultingServices Department. Saudi Aramco shall have the right to reject therepair and require a damaged shaft to be replaced.2.4.5.2.2 Fabricated aluminum cage and cast aluminum cage designs are notacceptable.2.4.6 Dynamics2.4.6.1 Resonances2.4.6.1.1 (Addition) All motors controlled by an Adjustable Speed Drive shall befree from any critical speed up to 15% above the maximum continuousoperating speed. (rigid rotor design)Next Planned Update: 10 March 2017 Form-Wound Induction Motors 500 HP and Above2.4.6.1.2 (Addition) The motor design shall be based on a foundation that meetsSAES-Q-007 and relevant International Standards.2.4.6.2 Dynamic Analysis2.4.6.2.1 (Addition) For motors 2000 kW (2700 HP) and above which operate ator above 1800 RPM (4 pole), the vendor shall provide a dampedunbalanced response analysis for each machine from zero to 120% of themaximum operating speed.2.4.6.2.3.b (Addition) The shaft displacement relative to bearing housing of anycritical speed below Maximum Continuous Speed shall not exceed1.5 times the predicted value at the Maximum Continuous Speed.2.4.6.2.3.f (Exception) The support stiffness and damping characteristics shall bebased on actual modal testing or analytical analysis such as FiniteElement Method.2.4.6.2.5 Mechanical equipment vendor is responsible for analysis and motorelectrical equipment vendor shall provide required physical data toMech. equip Vendor. Analysis is required for all applications.2.4.6.3 Balancing2.4.6.3.1 (Addition) The rotor third balancing plane is required if two balancingplanes are insufficient to meet the required balancing criteria.2.4.6.3.2 Brass weights are acceptable. It is recognized that Exd machines may nothave removable balance weights.2.4.6.3.3 (Addition) The same balancing grade shall be used for the coupling andthe motor rotor.2.4.6.3.8 Shaft-mounted fans and other removable components shall be componentbalanced on a mandrel. Suitable access shall be provided for at least twobalancing planes for field trim balancing for 1000 HP (746 kW) motorsand above.2.4.6.4 VibrationIn the case of motors supplied with driven equipment, the packagevendor shall meet the API vibration limits with the motor coupled to thedriven equipment and operated at rated voltage and speed.2.4.7 Bearings, Bearing Housings and SealsNext Planned Update: 10 March 2017 Form-Wound Induction Motors 500 HP and Above2.4.7.1 Bearings2.4.7.1.1 Hydrodynamic radial bearings shall be provided on horizontal motors.2.4.7.1.2 Ductwork is considered to be internal.(Exception to last sentence) The metal temperature of pressure lubricatedbearings shall not exceed 105°C in the loaded area, based on a maximumoil inlet temperature of 60°C. During shop testing, the differentialbetween the bearing loaded area temperature and the actual oil inlettemperature shall not exceed 45°C.2.4.7.1.3 It is recognized that an Exd machine may require antifriction bearings.2.4.7.1.14a (Exception) The metal temperature of pressure lubricated bearings shallnot exceed 105°C in the loaded area, based on a maximum oil inlettemperature of 60°C. During shop testing, the differential between thebearing loaded area temperature and the actual oil inlet temperature shallnot exceed 45°C.2.4.7.1.14b (Exception) For ring-oiled or splash systems (self-lubricant), themaximum bearing metal temperature in test and in operation shall notexceed 95°C.2.4.7.1.15 Oil cooler shall maintain the lube oil supply temperature at or below60°C.2.4.7.1.18 Motor with rated synchronous speed of 1800 RPM or lower shall becapable of being solo-run tested, un-coupled, without the need for thedriven equipment to limit the rotor axial movement.ExceptionHigh speed motors (i.e., 2 Pole motors) with shaft mounted fans thathave a rotor thrust do not need to comply with 2.4.7.1.18, above.2.4.7.2 Bearing Housings2.4.7.2.2 Tapped and plugged fill and drain openings of at least DIN 15 areacceptable.2.4.7.2.4 (Exception) Air gap measurements may be made on a partiallyassembled machine. Indirect air gap measurement is acceptable.2.4.7.3 Shaft SealsPressure balancing tubing material may be industrial grade flexible hoseNext Planned Update: 10 March 2017 Form-Wound Induction Motors 500 HP and Above suitable for the environment.2.4.8 Lubrication2.4.8.1 The motor vendor shall be responsible for selecting the means ofemergency coast down lubrication, based on input from vendor havingcomplete unit responsibility. If the emergency coastdown system is notsupplied by the motor vendor, the motor vendor shall advise the drivenequipment vendor that the motor is not supplied with emergencycoastdown protection.2.4.8.4 Unless otherwise specified, common pressurized or circulating oilsystems shall be supplied by the Vendor having unit responsibility.A self-lubricated bearing is not considered to be a self-containedcirculating oil system.(Addition) If self-contained circulating oil system is provided, oil levelsensors shall be supplied.2.4.8.5 Unless otherwise specified, lube oil shall be ISO VG46.2.4.8.6 (Exception) Unless otherwise specified, pressure oil systems shallconform with the requirements listed on the driven equipment data sheet.2.4.9 End Play and Couplings2.4.9.1 It is recognized that an Exd motor may not conform.2.4.9.3 It is recognized that an Exd motor may not conform.2.4.9.4 Unless otherwise specified, the electrical machine vendor shall install themotor half coupling on the motor shaft with a cylindrical fit.2.4.10 Materials2.4.10.1 General2.4.10.1.5 Phenolic wedges shall not be used.2.4.10.2 Castings2.4.10.2.3 (Exception) Castings shall not be repaired by peening, plugging, burningin, impregnating or by the use of any plastic or cement compounds.2.4.10.3.1 Other acceptable welding codes are: CSA W47.1, CSA W59, EN 287-1,ISO 15614-1 & 2, ISO 3834-1, ISO 15607, ASME SEC IX, AWS D1.1and ISO 15609-1.Next Planned Update: 10 March 2017 Form-Wound Induction Motors 500 HP and Above2.4.10.3.4 Intermittent welds may be used, such as on gasket supports and fanhousings, where significant problem-free operating experience exists andwell-established design procedures are available.2.4.10.5 The maximum mesh size of protective grills or metal screens shall be12.7 mm (0.5 in).2.4.10.6 Fans(Exception) Only metallic fans are acceptable.2.4.10.7 Stator Lamination Core PlateStator core lamination plate shall be of at least C-5 quality in accordancewith ASTM A345, or IEC 60404-1-1.2.4.10.8 Heat Exchangers2.4.10.8b 1.00 mm wall thickness is allowed.2.4.11 Nameplates and Rotation Arrows2.4.11.1 An additional main nameplate shall be located on the inside of the doorof an auxiliary terminal box, in order to preserve long-term legibility.2.4.11.2 All writing shall be indelibly marked in English with raised metallettering, engraving or stamping.2.4.11.4 The following information, in addition to that detailed in Section2.4.11.2, shall be provided on either the same nameplate required bySection 2.4.11.2 or on a separate nameplate:a. Saudi Aramco purchase order number or contract number.b. Location of manufacturec. Manufacturer's order reference number2.4.11.5 Each major component of the motor shall be identified with the motorserial number, which may be stamped on a nameplate affixed to thecomponent or stamped directly on the component itself. The instructionmanual shall indicate where these markings can be found. The followingmajor components shall be identified:a. Stator frameb. Stator core pack (if removable)c. Rotord. Bearing pedestalsNext Planned Update: 10 March 2017 Form-Wound Induction Motors 500 HP and Abovee. Bearing end capsSection 3 Accessories3.1 Terminal Boxes3.1.1 Main terminal boxes shall be sized to accommodate motor leadconnections, specified current transformers, and, when required by 3.6.2,surge capacitors and surge arresters.3.1.2 The terminal box shall be capable of withstanding the fault described inthis section.3.1.3 Accessory leads shall terminate on suitable terminal blocks.3.1.4 Terminal boxes for accessory leads shall meet the requirements forNEMA 4 or, in the case of severe corrosive areas, NEMA 4X inaccordance with NEMA 250, or IP55 in accordance with IEC 60529 with316 stainless steel.Exception:If vertical gasketed surfaces are not provided with a drip shield, then theenclosure shall be NEMA 4X type.3.1.6b If a terminal box contains accessories (e.g., current transformers, surgearresters, etc.), space heaters shall be provided. It is recognized that Exdmotors may not conform to this requirement.3.1.6f Removable links shall be provided.3.1.6g Adequate space for outdoor type terminations for the shielded cablesshall be provided in the terminal box.3.1.6m Ground bus shall be provided for motors 750 kW (1000 HP) and above.3.1.8 If differential current transformers are specified, secondary leads shall beprovided.3.1.9 Wiring marking may be made by stamped tag plates.3.1.10 All motor accessory wiring external to the machine shall be mechanicallyprotected in galvanized rigid steel conduit terminated by stainless steelflexible liquid-tight conduit as per section 5.5 of API STD 670.Rigid steel conduit fittings shall be cast iron or cast steel. For motorsspecified for use in severe corrosion areas, the conduit and conduitNext Planned Update: 10 March 2017 Form-Wound Induction Motors 500 HP and Above fittings shall be either PVC coated or in stainless steel.Exception:Flexible liquid-tight conduits may be used for TEFC motors.3.2 Winding Temperature Detectors3.2.1 Embedded RTDs for the stator windings shall be provided as follows:Size Motor RTDs Per Phase370 kW (500 HP) through 7500 kW (10,000 HP) 2Above 7500 kW (10,000 HP) 33.2.1.1 RTDs shall be 100-ohm, platinum, three-lead resistance temperaturedetector with a temperature coefficient of resistance equal to0.00385 ohm/ohm/°C from 0°C to 100°C.3.2.1.2 Leads of sensing elements shall not be grounded in the terminal box.3.3 Bearing Temperature Detectors3.3.1 Bearing temperature sensors shall be installed on motors withhydrodynamic bearings.3.4 Space Heaters3.4.1 Space heaters shall be supplied for all motors.3.4.2 An engraved nameplate shall be located near the space heater terminalblock which shows the space heater operating single phase voltage.3.6 Alarms and Control Devices for Motor Protection3.6.2 Surge ProtectionMotors rated 13.2 kV and above shall be furnished with surge capacitorsand surge arresters. Unless otherwise specified, surge capacitors andarresters are not required on lower voltage motors.Exception:Surge arresters and capacitors shall not be installed with motors fed fromAdjustable Speed Drives.3.6.3 Differential Current TransformersMotors 3750 kW (5000 HP) and larger shall have provisions for self-Next Planned Update: 10 March 2017 Form-Wound Induction Motors 500 HP and Above balancing differential relay protection. Motor vendor shall provide andinstall 50:5 ratio, ANSI rating C20, current transformers in each phasefor this purpose. The IEC equivalent of the C20 ANSI class currenttransformer (50:5 CT with 5VA class, 10P20, 5 A) is acceptable.CTs shall be suitable for the specified environmental conditions.Exception:Motors controlled with Adjustable Speed Drives shall not be equippedwith current transformers for differential protection.3.6.4Partial Discharge Monitors3.6.4.1 Partial discharge equipment, consisting of capacitive couplers, outputsignal wires, and auxiliary PD signal terminal box, shall be installed onall 13.2 kV and above rated motors.Exceptions:Partial discharge monitoring can be deleted if approved by the Companyor Buyer representative with the concurrence of the Proponent orChairman, Motors & Generators Standards Committee.3.6.4.2 Three 80 pf epoxy mica capacitive couplers shall be permanentlymounted inside the main terminal box, one for each phase, covered withinsulation boots.3.6.4.3 Auxiliary partial discharge signal terminal box shall be mounted on ornear the main terminal box.3.8 Vibration Detectors3.8.1 Horizontal motors rated in excess of 750 kW (1,000 HP) and equippedwith hydrodynamic radial bearings shall be provided with two non-contacting vibration probes in each radial bearing housing and one eventper revolution (key phasor) probe.3.8.2 Motors equipped with hydrodynamic radial and hydrodynamic thrustbearings shall be provided with two non-contacting vibration probes ineach radial bearing housing, two axial position probes and one event perrevolution (key phasor) probe.3.8.3 Vertical motors driving pumps shall have two velocity transducersmounted on or as close as practicable to the top bearing housing. Onetransducer shall be mounted on the axis of the pump suction/dischargenozzles and the other at 90 degrees to this axis. Vertical motors drivingNext Planned Update: 10 March 2017 Form-Wound Induction Motors 500 HP and Above equipment other than pumps shall have the transducers mounted in thedirection of maximum vibration, as determined by testing.3.8.4 Vibration and position equipment shall be furnished and installed inaccordance with 34-SAMSS-625, referring to API STD 670.Section 4 Inspection, Testing and Preparation for Shipment4.2 Inspection4.2.1 General4.2.1.1a The following material certifications shall be kept available for at least5 years: Forged shaft, silicon steel, copper wire, copper bar, and bearingcastings.4.2.1.1e Final assembly clearances of rotating parts shall be kept available.4.2.2.3 Ultrasonic inspection shall be performed on all forged components.4.2.2.4 Magnetic particle inspection shall be performed on all shaft welds.4.2.2.5 Liquid penetrant inspection shall be performed on all shaft welds.4.2.3.2 For all machines having circulating, pressure oil systems, the oil systemfurnished shall meet the cleanliness requirements of 32-SAMSS-013 andAPI STD 614 or equivalent standards.4.3 Final Testing4.3.1.7 Lube oil inlet temperature adjustment during mechanical running tests isnot required.4.3.1.16 Test equipment accuracy demonstration is not required.4.3.2 Routine Test4.3.2.1d The preferred values of test voltage shown in Table 6 (API STD 541)shall be used for the polarization index. Minimum insulation resistancewhen corrected to 40°C shall be 100 megohms.4.3.2.1L It is recognized that it may not be possible to measure the air gap duringthe routine test on Exd machines.4.3.2.1m Only shaft voltage measurements are required.4.3.3.1 Alternative methods that determine out-of-roundness of the journal and。