Aluminium Plate-Fin Heat Exchangers - Linde Engineering

5A Refinery flue gas 1B Refinery flue gas 2C HP residual gasD MP residual gasE LP residual gasG Seal gasH Product LPG 1I Product LPG 2K Refrigerant 1L Refrigerant 2(1)...(6) Cooling stagesPlate-fin heat exchanger for a LPG plantBenefitsDue to the characteristics and the wide range ofapplications aluminium plate-fin heat exchangersdesigned and manufactured by Linde have a lotof benefits for the user.Low investment costs due to:– Very compact design taking less space thanconventional heat exchanger types.– Reduced number of items, as many streamscan be treated within only one compact heatexchanger unit.– Low weight aluminium design thus reducingcosts for support structures.Low energy costs due to:– Small possible temperature differencesbetween the streams.– Low pressure drops.Optimal performance due to:– Tailor-made design for each plate-fin heatexchanger with regard to thermal, hydraulicand mechanical design.– Highly efficient heat transfer using a bigselection of different aluminium fins.

6Engineering.Design standardsThe process and mechanical design basis forplate-fin heat exchangers results from theknow-how of Linde as a leading engineeringcompany for turnkey plants. Linde is a foundingmember of the Brazed Aluminium Plate-FinHeat Exchanger Manufacturers´ Association(ALPEMA) and is also member of other internationalorganizations, such as HTRI and HTFS.Equipment design and manufacturing, basedon client´s specifications and Linde´s own standards,are carried out in accordance with nationaland international standards, such as:– PED European Pressure Equipment Directive– AD-Merkblatt– ASME Code– Australian Standard– British Standard– Chinese Standard– Codap– IGC-code– Japanese Industrial Standards– Raccolta/VSR– Stoomwezen Grondslagen– Swedish Pressure Code– Russian GostStructure1 Stub pipe/nozzle2 Header tank3 Distributor fin4 Heat transfer fin5 Partition plate6 Side bar7 Cover plateA inD outC in345B out67B in21C outD inA out

7Helium liquefaction unitTechnical dataDimensions per core max. (W x H x L)1.5 x 3.0 x 8,2 mSurface/volume max. approx. 1600 m 2 /m 3Fin typeFin heightFin thicknessStandard design temperatureDesign pressuresplainperforatedserrated4.0 to 9.5 mm0.2 to 0.6 mm-269 to +65°C (150°F)up to approx. 110 bar (1595 psig)Materials block: ASTM 3003/EN AW 3003headers, nozzles, flanges:ASTM 5083/EN AW 5083ASTM 5454/EN AW 5454Quality management and inspectionQuality management is an essential part ofLinde´s company strategy.Linde is certified according to:– EN ISO 9001 / EN 29001– German Pressure Vessel Rules (AD-HP0)– ASME (U, U2, R-Stamp) and others.– Manufacture license of special equipment(China)– Certificate of manufacture registrationof cylinder (Korea)Acceptance inspection is carried out by Linde´sown specialists and further by experts fromvarious international inspection organisations,such as:– TÜV (German Technical Supervisory Society)– Lloyd´s Register– Stoomwezen– ISPESL– Bureau Veritas– Det Norske Veritas

8Production.Highly skilled welders are providinghighest quality aluminium productsIn 1981 Linde started fabrication of aluminiumplate-fin heat exchangers, applying the vacuumbrazing technology. This procedure does notrequire any flux and no post-braze cleaningsteps are necessary.Since that time, Linde has fabricated more than10,000 heat exchanger blocks for a wide rangeof applications.Before and during production all raw materialsand prefabricated parts are stringently controlledto ensure proper choice of material as wellas surface quality and dimensional accuracy.After forming, cutting and cleaning of the singleparts the block is stacked and prepared for highvacuum brazing at about 600°C.For welding of headers and nozzles to the coreproven welding procedures, such as GTAW andGMAW, are used.Extensive test procedures are carried out on thecompletely assembled heat exchangers. Theseinclude radiographic and dye penetrant testingof weld seams, pressure test and helium leaktests and if requested, flow tests.

9Parting sheets, cover sheetsFinsSide barsRaw materialsRaw materialsRaw materialsMeasuring, cuttingStamping,measuring, cuttingMeasuring, cuttingWashingWashingWashingStackingVaccumbrazing furnaceHeaders and nozzlesRaw materials Raw materials Raw materialsMeasuring, cuttingAssemblyMeasuring, cuttingCompletion of heat exchangerTestingHe pressure TUEV ASME-U others9

10Design versatility.Single unitsLinde plate-fin heat exchangers can be suppliedas single block units with stub pipes, materialtransitions, aluminium or stainless steel flangesas connection to the plant piping. They are preparedfor individual insulation on site.Manifolded assembliesIf more heat transfer surface is required, severalheat exchanger blocks can be assem bled in theLinde workshops to a completely manifoldedheat exchanger system.Cold boxesAn economical alternative, which saves timeduring site work, is the installation of differentexchangers in a steel containment (cold box).Interconnecting piping, vessels, valves andinstrumentation are included in this packagedunit to form, after filling with insulation material(perlite), a ready-to-operate unit.Block-in-shellOne or more heat exchanger blocks installed ina shell instead of a tube bundle. This is a highlyefficient and economical alternative to standardshell-and-tube heat exchangers.Benefits:– Tighter approach temperatures– Smaller in size and weight– Lower capital cots (CAPEX)– Lower operating costs (OPEX)

11Installation and after sales service.Fabrication facility Schalchen, GermanyPlant components and assemblies up to 7 min height and width, 56 m in length and morethan 200 tons weight can be handled. Biggerunits can be assembled on shore or at site.Linde AG provides complete services on:Field installationQualified and experienced Linde erectionengineers, fitters and wel ders are available tocarry out and/or to supervise the installationof the heat transfer systems on site.OperationThe Linde Engineering team with numerousthermodynamic, hydraulic, process and mechanicalengineering specialists is pleasedto support the customer with sound problemanalysis and operational improvements.CleaningIf problems occur due to fouling or pluggingof exchanger passages, immediate problemanalysis can be carried out and suggestionsfor possible cleaning procedures will be made.Supervision of the cleaning process can beprovided.RepairsA specialized service crew is available forimmediate and professional repair services.Linde is a founding member of ALPEMA(Aluminium Plate-Fin Heat ExchangerManufacturers´ Association)

Designing processes – constructing plants.Linde´s Engineering Division continuously develops extensive process engineering know-how in the planning,project management and construction of turnkey industrial plants.The range of products comprises:− Petrochemical plants− LNG and natural gas processing plants− Synthesis gas plants− Hydrogen plants− Gas processing plants− Adsorption plants− Air separation plants− Cryogenic plants− Biotechnology plants− Furnaces for petrochemical plants and refineriesMore than 4,000 plants worldwide document the leading position of the Engineering Division in internationalplant construction.Production facilities.At Linde Engineering Schalchen Plant over 700skilled engineers and workers design and manufacturecomponents and complete modules fornumerous applications in process plants such asethylene plants, hydrogen and synthesis gasplants, LNG plants and air separation plants. Productioncapacity totals approx. 1.3 million hoursper year.In addition, the plant offers services for field installationand advice on operation. A specialisedservice crew is available for immediate and professionalrepair services.Product range.– Aluminium plate-fin heat exchangers assingle units or as manifolded assemblies– Cold boxes with aluminium plate-fin heatexchangers, columns and vessels– Coil-wound heat exchangers and isothermalreactors for chemical and petrochemicalplants– Columns and pressure vessels in aluminiumfor cryogenic plants– Spiral-welded pipes in aluminium– Storage tanks for liquefied gases– Steam-heated waterbath vaporisers as wellas air-heated vaporisers for liquefied gasesFor further informations please contact:Linde AGEngineering Division, Schalchen PlantCarl-von-Linde-Strasse 15, 83342 Tacherting, GermanyPhone +49.8621.85-6434, Fax +49.8621.85-6622E-Mail: plantcomponents@linde-le.com, www.linde-plantcomponents.comP/3.2.e/12