1、Specification for Indirect Type Oilfield HeatersAPI SPECIFICATION 12K EIGHTH EDITION,OCTOBER 2008EFFECTIVE DATE:APRIL 1,2009Specification for Indirect Type Oilfield HeatersUpstream SegmentAPI SPECIFICATION 12K EIGHTH EDITION,OCTOBER 2008EFFECTIVE DATE:APRIL 1,2009Special NotesAPI publications necess
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14、tension of up to two years may be added to this review cycle.Status of the publication can be ascertained from the API Standards Department,telephone(202)682-8000.A catalog of API publications and materials is published annually and updated quarterly by API,1220 L Street,N.W.,Washington,D.C.20005.Su
15、ggested revisions are invited and should be submitted to the Standards Department,API,1220 L Street,NW,Washington,D.C.20005,standardsapi.org.iiiContentsPage1Scope.12References.13Definitions .24Materials.54.1 General.54.2 Coils.54.3 Flanges.54.4 Fittings.54.5 Proprietary Fittings.54.6 Bolting.54.7 Sh
16、ells,Firetubes and Stacks.85Design.85.1 Coil Design.85.2 Shell Design.95.3 Standard Firebox Rating.105.4 Firetube Heat Flux.115.5 Firetube Heat Density.115.6 Stack Height.116Fabrication,Testing and Painting.116.1 General.116.2 Coil Fabrication.116.3 Shell,Firetube,Stack and Accessories .156.4 Painting.157Marking.167.1 Nameplate.167.2 Shell Nameplate.167.3 Coil Nameplate.177.4 Coil Connection.178Inspection and Rejection.188.1 Inspection Notice.188.2 Inspection by Purchaser.188.3 Rejection.188.4 C