Westfalen Austria GmbHAumühlweg 21/Top 3232544 LeobersdorfAustriaTel. +43 2256 63630Fax +43 2256 63630-330www.westfalen.atinfo@westfalen.at

Westfalen Gas s.r.o.Masarykova 162344 01 DomažliceCzech RepublicTel. +420 379 420042Fax. +420 379 420032www.westfalen.czinfo@westfalen.cz

Westfalen Gas Schweiz GmbHSisslerstr. 11/P.O. Box5074 Eiken AGSchweizTel. +41 61 8552525Fax +41 61 8552526www.westfalen-gas.chinfo@westfalen-gas.ch

Westfalen Medical BVRigastraat 147418 EW DeventerThe NetherlandsTel. +31 570 858450Fax +31 570 858451www.westfalenmedical.nlinfo@westfalenmedical.nl

Westfalen BVBA-SPRLWatermolenstraat 119320 Aalst/AlostBelgiumTel. +32 53 641070Fax +32 53 673907www.westfalen.beinfo@westfalen.be

Westfalen France S.A.R.L.Parc d’Activités Belle Fontaine57780 RosselangeFranceTel. +33 387 501040Fax +33 387 501041www.westfalen-france.frinfo@westfalen-france.fr

Westfalen Gassen Nederland BVP.O. Box 7797400 AT DeventerThe NetherlandsTel. +31 570 636745Fax +31 570 630088www.westfalengassen.nlinfo@westfalengassen.nl

Westfalen AGIndustrieweg 4348155 MünsterGermanyTel. +49 251 695-0Fax +49 251 695-194www.westfalen.cominfo@westfalen.com

Gases I Energy supply I Service stations

5

Reliable supply. Helium from Westfalen.

Perfectly tailored: delivery formats.

Whatever volume of helium you need, we supply in the ideal format and quality - whether that's easily portable in cylinders, liquefied in dewars, or in specialised trailers and ISO-containers for bulk users.

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Helium allows even the tiniest leaks to be reliably traced.

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Your reliable supply

Westfalen's extensive investment programme helps ensure that you can rely on our supply capability. Westfalen has both expanded its transport capacity and invested in technology for segregated cylinder filling and its fleet of cylinders and vessels. Key to providing reliable and economical helium supply is access to a number of the world’s very limited available sources. Westfalen has been able to secure such access through long-term contracts that ensure we can draw on sufficient helium volumes to guarantee your supplies.

A host of applications

Helium's versatility is demonstrated by its wide-ranging applications, which include

¾ a component of welding shield gas¾ operating gas component for CO2-lasers¾ detector gas for seal testing and leak detection¾ shield gas in glass fibre manufacture¾ reference and carrier gas in instrumental analysis¾ lifting gas for balloons and airships¾ breathable gas additive for divers and astronauts¾ liquid coolant for superconductors.

Straight from the ground: helium production

After hydrogen, helium may indeed be the second most common element in the universe. However, it makes up for this by being

extremely rare down here on Earth. The highest concen-trations of this noble gas are unfortunately well out of our reach, occurring some 1000 km up in the atmosphere. Helium is however also found in natural gas deposits where it accounts for between 0.1% and 0.5%. Natural gas is liquefied during extraction in a complex process, as part of which the crude helium is separated then in a second step is filtered and purified before being stored in liquid form ready for transport.

Delicate transport

41000 litres of liquid helium at a time makes the journey to Germany, “packaged” in a special container with two layers of vacuum insulation and a cold shield of liquid nitrogen. Liquefying the noble gas at -269 degrees Celsius means it can be transported economically.Travelling by land and sea, the ultimate destination of the gas is Westfalen’s Speciality Gases centre in Hörstel near Osnabrück, Germany. This is where the filling to specific requirements is performed for the numerous areas of application.

As you like it

How do you need your helium? As high purity gas, up to 99.9999 percent volume purity? As a component of a mixture? Gaseous? Liquefied? A little, or a lot? At 200 or 300 bar? In Westfalen's state-of-the-art filling plant, your wish is our command.Our range includes a wide variety of gas mixtures that have helium as a component – such as for welding or analytical instruments.

You can count on Westfalen reliability for secure supply.

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For all your gas requirements you can rely on the support of Westfalen's qualified professionals - right through from requirements analysis to delivery and connection.

Helium is an important compo-nent of Argon He 11® welding shield gas.

MRT scanners are indispensable in modern medical diagnosis – helium allows the strong magnetic fields needed to be produced.

Helium also lifts children's hearts: as a lift gas for balloons and large airships.

Helium delivery formats

Product Purity Alumini®1) High pressure cylinder2)3) Trailer2) Dewar4) ISO-container

12 70 200 2 l 3 l 10 l 20 l 50 l 600 l 19 500 l 60 l 100 l 250 l 380 l 41000 l

Helium 4.6 99.996 Vol.-% - - - ¡ - ¡ ¡ ¡ ¡ ¡ - - - - -

Helium 5.0 99.999 Vol.-% ¡ ¡ ¡ - - ¡ ¡ ¡ ¡ ¡ - - - - -

Helium 5.5 99.9995 Vol.-% - - - - - ¡ - ¡ ¡ - - - - - -

Helium 6.0 99.9999 Vol.-% - - - - - ¡ - ¡ ¡ - - - - - -

Helium ECD ECD - - - - - ¡ - ¡ - - - - - - -

LiquidHelium - - - - - - - - - - ¡ ¡ ¡ ¡ ¡

Balloon gas - - - - ¡ - - - - - - - - - -

Conversions helium m3 lliquid kg

1 m3 bei 288.15 K (15 °C); 1 bar 1 1.336 0.167

1 lliquid bei Tboiling point; 1 bar 0.748 1 0.125

1 kg 5.988 8.00 1

1) Alumini® 12: Pressure can of 1 l geometric volume, 12 bar filling pressure, gaseous content approx. 12 l Alumini® 70: Pressure can 1.6 l geometric volume, 70 bar filling pressure, gaseous content approx. 112 l Alumini® 200: Mini cylinder of 0.5 l geometric volume, 200 bar filling pressure, gaseous content approx. 75 l

2) Geometric volume in litres, gaseous content at 1 bar and 15°C: 2 l: approx. 0.4 m3; 10 l: approx. 1.8 m3; 20 l: approx. 3.6 m3; 50 l: approx. 9.1 m3; 600 l (cylinder bundle 12 x 50 l): approx. 109.2 m3; Trailer: approx. 3.500 m3

3) 50 l high-pressure cylinder and cylinder bundle also available in 300 bar technology4) Cryogenic dewar, liquid content 60, 100, 250 or 380 litres

Physical data for heliumMolar mass 4.00 g mol-1

Liquid phaseBoiling point 4.22 K (-268.9 °C)

Latent heat of evaporation 20.42 kJ kg-1

Liquid density 125 kg m-3

Gaseous phase (at 1.013 bar)

Density (at 273.15 K) 0.18 kg m-3

Density ratio to air (at 288.15 K) 0.14

Specific heat (at 298.15 K) 5.20 kJ kg-1K-1

Thermal conductivity (at 288.15 K) 0.1482 J s-1m-1K-1

Critical point

Temperature 5.2 K (-268 °C)

Pressure 2.28 bar

Density 69.6 kg m-3

Triple Point

Temperature (at transition point) 2.177 K (-271 °C)

Vapour pressure 0.051 bar

Heat of fusion 3.49 kJ kg-1

Ignition point - K (°C)

Ignition range in air - Vol.-%

Calorific value to DIN 51850 - kJ m-3