Brochure Pdr English 07

8/13/2019 Brochure Pdr English 07

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EnergyTechnology Division

A company of mg technologies group

Nantes Factory and head officeBP 21515- 25, rue de Ranzai, 44315 NANTES Cedex 3, France

Tel: +33 2 40 68 24 24 - Fax: +33 2 40 49 34 39Website: www.btt-nantes.comE-mail: [email protected]

BttBatignolles Technologies Thermiques

Conceptionralisation

:MunicaOuest0240437878

COFIMCO FAN


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BttBatignolles Technologies Thermiques

SERVICESCOMPONENTS

AIRCOOLED HEATEXCHANGERS

AIRCOOLED CONDENSERS


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G EA-Btt : A true lead ership ....................................................................... 4

ServicesHelping yo u Resolve the Pro blems ................................................. 6

Improving the Perfo rmance of your

Aircooled Heat Exchangers

a nd Aircoo led Con densers ................................................................................. 8

Components

Orig ina l Spa re Pa rts .............................................................................................................................................................. 10

Finn ed Tub es ..................................................................................................................................................................................... 12

Tub e Bu nd les .................................................................................................................................................................................... 14


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GEA Group, whichfederates morethan 250 companies

throughout the world,is the leader in heat

transfer technologies.

1958: Delivery of the 1stAPI Aircooled HeatExchanger in a French manufacturing

plant. This Aircooler activity startedunder the licence agreement

with Hudson ProductsCorporation from 1958 to

1979.

Productivity per week:

30 tube bundles,

50 km of extruded tubes,

48 km of L and G tubes.

Staff:250 persons,including 50engineers andmanagers.

Site surface: 125,000 m246,000 m of which is covered.

The Na nt es fa cto ry bo ug ht in 1985 by G EA, a sserts its 1st po sition a s man ufa cturer of API 661 Aircooled Hea t

Excha ng ers wo rldw ide, due to its 50 years experience a nd technica l inno vat ion. Furthermo re GEA-Btt develops

its expertise in t he a rea of Va cuum Stea m Cond ensers suita ble fo r oil a nd g a s specifi cation s.


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After-sales ServiceBTT supplies spare parts and services to all the

A ircooled Heat Exchangers users.

O ur multivalent technicians are highly experienced.

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Strong Innovation andDesign CapacityPermanent development and updates:

finished elements analysis of the components and

critical sub-assemblies,

specif ic softwares for A ircooled Heat Exchangers

calculations and 3D drawings,

ERP management system under SA P.

1st

w orld production capacity of API661 Aircooled Heat ExchangersIn 2004 :

600 A ircooled Heat Exchangers bays = 20,000 tons of material,

95% are exported, 4/5 out of the European Union.

Quality InsuranceBTT is certified according to ISO 9000 since 1994, and A SM E (U, U2, S stamps) since 1978. The

company complies with the latest European regulations not only in design area but also in the

manufacturing area: EN, PED, ATEX


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Product physical propert ies chang e: therma l dut y raise.

Th e e n v iron me n t o f t h e Aircoo le d H e a t Exch a n g e r ch an g e s: ob s t ru ct i on s t o t h e f r e sh a ir in t a k e , h o t a i r

re-circulation.

Heat tra nsfer surfa ce is fouled: stat ic pressure ra ise.

Belt d rive slips, fa n bla des pitch va ries: air f low decrease.

Wa ter spra ying o n tub es to improve performa nce: deposits ca using a the rma l ba rrier, sta tic pressure increase,

irreparable damage.

Bearings are d am ag ed t oo fa st , eventual causes: vibrat ions, incorrect set t ing of the pul leys, inad eq uat e

t ightening of t he bea rings.

Lea kages o n t ube bundles: tub es/tube sheets connections a re ge tting lost, g asket sea ts are

da ma ged , plug t hreads are crushed.

Ta ke a dva nt a g es of ou r prof essiona l skills:

therma l synthesis: evaluat ion o f the real

capa city o f t he Aircoo led Heat Excha nge r

compa red to its nom inal duty,

vibra tions a na lysis: a djustme nt of the fan s

and drives settings to extend service life,

lea kag es sea rch: a prof essiona l skill

operation highly complex on Vacuum

Stea m Cond ensers,

supervising the re-tub ing opera t ions :

securing t he sched ule dura tion beca use of o ur supervi-

sors long-term experience, supervising the a ssembly or mod ification w ork: reduction

in wo rk schedules a nd commissioning w ith a gua rant ee of

performance,

sealing works: re-tub ing , mechanica l and therma l designre-w orked to extend relia bility o f finned tube s, head er

bo xes, t ube s/tub e sheet s conne cion s.


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1. Sound level t est ing2. Blade sett ing wit h torque

wrench3. Cleaning4. Air fl ow measurement /

sound level t esting5. Bearing adjustment6. Retub ing

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GEA-Btt enables you to improve the performance of your Aircooled Heat Exchangers andAircooled Condensers by combining thermal sizing, mechanical design, manufacturing andassembly on site.3 steps for the debottlenecking:

Site survey:

checking o f the hea t tra nsfer surfa ce: fo uling d etection, f ins condition (bo nding , bending, corrosion).

checking o f the a ir f low , roun ds per minute, pitch an g les, vibration s freq uencies, soun d po w er level.

da ta ga thering by Custo mers Processes Eng ineers: tem perat ure/flow /pressure da ta recorded during pro duction.

Analysis, design and manufacture:

an alysis of t he da ta by our thermal Engineers,

performing improvement simulat ions

- air f low increa se: opt imized ad justm ent , driving pow er increase, fa ns upg rad ing,

- extending of the heat t ransfer surface so as to a bsorb the new t hermal loa d.

mechanica l design and ma nufa cture .

Assembly on site:

supervision of yo ur tea ms or mod ificat ion of t he Aircooled Hea t Excha ng ers on a turn key basis: disa ssemb ly,

a ssembly, ad justment a nd com mission ing in complia nce w ith shut d ow n schedule.

cura tive clea ning of the t ransfer surfa ce if necessary.

performance tests.

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1. Cleaning2. Bundles erection3. Blade pi tch angle adjustment4. Integration on old system5. Louvers6. Inlet bell fi t ting

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G EA-Btt manages the records of drawings and the part-lists of equipment manufactured. We use microfilmedrecords from 1959 to 1997 and electronic data base from 1998.

G EA-Btt proposes identical or interchangeable spare parts, designed and manufactured in compliance with the

most recent standards and international codes.

G EA-Btt proposes a 10-working-day delivery time for most common parts.

G EA-Btt can also propose an expedited delivery concept (less than 72 hours) on request for parts on stock.

For important quantities, G EA-Btt will propose you a specific delivery

time complying with your request.

Pressure parts:G askets, header plugs, cover gaskets, cover bolting.

Rotating parts:Fan shaft bearings, shafts, pulleys and belts, hubs and fan blades,

positioners, vibrations switches

Contact :

By fax: + 33 (0) 2 40 49 34 39

By E mail:

spares@ btt-nantes.com

i.drouet@ btt-nantes.com

By phone:

Tl. :+33 2 40 68 24 06

Tl. :+33 2 40 68 24 36

Tl. :+33 2 40 68 24 38

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1. Moore fan

2. Louver actuator

3. Gear drive

4. Vibration switch

5. Louvers

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The heat transfer surface of A ircooled Heat Exchanger is extended using aluminium spiral fins.

The thermal conductivity of this material is efficient. M oreover the purchasing and conversion costs are competitive.

A core tube, carefully degreased, is

fi tted into an aluminium sleeve. This

tube-in-tube assembly is then fed into

the fi nning machine equipped with

three spindles, 120 degrees spaced and

each fi tted with a gang disc. These discs

which are stepped in profi le and diameter

wi ll fi rst extrude and shape the fi n, and

then bond the fi ns on core tube.

G EA-Btt has developed a high perfor-

mance bimetallic extruded with 11 fi ns

/inch. Since 1992 a 2 inch diameter

extruded fi nned tube has been brought

in production. It combines a large flow

area with a long life duration suitable

for vacuum steam condensers.

The fi n consists of an aluminium strip,

which is tension-wrapped and embedded

into the core tube wall. This results from

the combined action of a set of tools.

O perating sequences are as follows:

the fi rst disc (groover) spins a groove

into the tube wall;

the ring spacer leads the strip foot-edge

into the groove;

fi nally the second disc (backfi ller)

fi rmly embedsthe strip foot-edge into the

groove by caulking the groove lip.

The aluminium strip foot section is fi rst

formed into an L-shape, then tension

wrapped onto the primary tube. The

wound fi n base sections are close to each

other so as to ensure a continuous cover

on the primary tube surface.

Finally, the fi n strip will be fastened at both

ends to prevent loosening or unravelling.

Bimetallic extruded 300 C/570 F Excellent Excellent 125

G(embedded) 400 C/750 F Poor Acceptable 105

L(wrap-on) 120 C/250 F Acceptable Poor 100


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A n aluminium strip is folded to form an

L-shape and then wound around the base

tube. The feet of the fi ns are joined to-

gether so as to ensure a continuous cover

on the primary tube surface. The whole

width of the foot of the fi n is knurled si-

multaneously with the inner tube, thus

ensuring a tight contact between the spi-

ral fi n and the primary tube.

The aluminium strip foot section is fi rst

formed into a double L-stepped shape.

This results in a fi n base twice as large as

that of a single L-shape. The LL-fi n strip is

then wrapped onto the primary tube so as

to obtain an overlapping on the 1st step-

ping of the LL-shaped fi n. A continuous

and double strip cover against corrosive

environment then effi ciently protects the

primary tube.

Knurled L 250 C/480 F Medium Acceptable 102

Double L 120 C/250 F Medium Poor 105

Maximum working temperatureAtmospheric corrosion resistanceMechanical resistancePrice index


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Plug HeaderThe plug header is suitable for working pressure up

to 350 bar.

The plug hole opposite each tube allows expansion of

the tube in the tube sheet, mechanical cleaning, and

plugging in case of leakage.

In case of high partial hydrogen pressure, tube attachments

can be sealed or strength welded through plug hole.

Cover Plate HeaderThe cover plate header is used for fluids with high

fouling factors, up to 40 bar maxi when a frequent

mechanical cleaning is necessary. T hey are used for

very corrosive fluids to periodically check the corro-

sion allowance.

Pipe HeaderThe pipe header is used for working pressures over 200 bar when no inner access is

necessary. Finned tubes hair pins are assembled with T IG butt weld. Welds can be

thermally treated and X-rayed if needed.

Welded Bonnet HeaderThe welded bonnet header is used for ammonia condensers. Freon condensers and

vacuum steam condensers. T he advantage is the full welded construction, perfectly

sealed.

Manifold HeaderA large circular manifold is used when the al-

lowable pressure drop is very low. This large

manifold ensures an equal distribution of

fluid flow in the tubes. The tube sheets

are directly welded to the manifold. This

type is used for vacuum steam condensers

and refrigeration units.

The bundle, composed of finned tubes and headers, assembled in a support frame, is the main part of A ircooled Heat

Exchanger.To extend operational life of your old A ircooled Heat Exchanger, we propose to manufacture new bundles which

comply wi th current regulations and standards, wi th the same or even increased heat transfer capacity.

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1. Strength welding

2, 3, 4 - TIG welding t ube / tube sheet

5. Support boxes

6. Incolloy pipe

7. Plug header

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Brochure Pdr English 07