CentrifugalFansforPetroleum Chemical andGasIndustryServices APISTANDARD673 THIRDEDITION DECEMBER2014 energy API AMERICAN PETROLEUM INSTITUTE
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Contents Page 1 Scope 2 Normative References.. 1 Terms and Definitions. 9 4 General. 11 4.1 Unit Conversion.. Unit Responsibility 11 4.2 11 4.3 Nomenclature... 12 5 Dimensions Requirements.. 12 5.1 Statutory Requirements 12 5.2 Alternative Designs. 12 5.3 12 5.4 Conflicting Requirements.... 12 6 Design.. General. 12 6.1 12 6.2 Fan Housing..... 20 6.3 ExternalForces andMoments. Fan Housing Connections 21 6.4 23 6.5 Rotating Elements. 23 6.6 Shaft Sealing of Fans 24 6.7 Dynamics 25 6.8 Bearings and Bearing Housings. 31 6.9Lubrication.... 6.10 Materials. 40 6.11 Nameplates and Rotation Arrows 43 Accessories. 44 7.1 Drivers... Couplings. 44 7.2 45 7.3 Belt Drives Mounting Plates. 47 7.4 47 7.5 Controls and Instrumentation 7.6 Piping.... 56 7.8 Silencers..... 7.7 Inlet Trash Screens... 60 7.9Insulation and Jacketing. 09 7.10 Turning Gears 09 7.11 Special Tools ... 60 60 8 Inspection Testing and Preparation for 61 8.1 General. 61 8.2 Inspection... Testing 61 8 Preparation for Shipment. 9 8.4 S9 9 Vendor Data 67 9.1 General. Proposals 67 9.2 89 9.3 Contract Data..