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Source: https://dryice.co.za/for-engineering/
Title: Dry Ice For Engineering (2020) 🎖️ | Dry Ice International
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Dry ice for (4) Engineering (2020) 

Did you know that dry ice is an excellent medium to use in many engineering processes?  We call it “ Dry Ice 4 Engineering ” 

TYPICAL APPLICATIONS OF DRY ICE IN ENGINEERING PROCESSES 

Mechanical engineering: Shrink fitting of bearings 

Chemical engineering: Process Cooling 

Civil Engineering: Pipe zing for pipe and valve repairs 

HOW CAN I USE DRY ICE FOR SHRINK FITTING OF BEARINGS? 

Dry ice is the solid form of carbon dioxide (CO 2 ) occurring at a temperature of -78.5 °C.  Mechanical engineers and artisans commonly use dry ice in a process referred to as shrink fitting (also known as ze fitting) . 

Bearings are an integral part of a machine’s moving components and reduce the amount of friction on rotating parts.  Bearing failure is common in older machines and vehicles, particularly those in high-wear conditions such as a mining or chemical environment. 

Shrink fitting is commonly used in engineering to fit together bearings, collars, shafts, and other components which require an interference fit.  The component to be “fitted in” to the other part is packed in dry ice causing it to contract.  While still cold, it is assembled with its mating part and allowed to return to ambient temperature.  In doing so, the cold part returns to its original size and creates the tight interference fit required.  This process is quick, simple to use, and causes no changes in the physical properties of the components, unlike heating the respective components which can change the hardness or toughness of the materials. 

WHY USE DRY ICE FOR SHRINK FITTING? 

Ease of use: Dry ice is easy to handle. 

Safe: If handled correctly, it is perfectly safe to use. 

Available: Dry ice can be delivered at your doorstep. 

Powerful: Dry ice is seven times more powerful than water ice.  The energy value of dry ice is 570 kJ/kg. 

HOW DO I STORE DRY ICE? 

Use an insulated cooler or polystyrene container.  We can supply you with the perfect size polystyrene container, or you can wrap the dry ice in paper or a blanket to extend the life even further if necessary. 

HOW LONG WILL DRY ICE LAST? 

If stored correctly, it will last five to ten days. 

WHERE CAN I GET DRY ICE? 

Contact Dry Ice International at the following number: 

+27 (0)10 040 3201 

Visit our website on: 

www.dryice.co.za 

Deliveries are done countrywide. 

We can deliver dry ice all over the country thanks to our network of retail depots in most provinces. Find a retail store near you on our Store locator page. 

We deliver to Cape Town, Johannesburg, Durban, Pretoria, Port Elizabeth, Soweto, Bloemfontein, East London, Sandton, Midrand, Middelburg, Witbank, Nelspruit, Upington, Kimberley, Rustenburg, Potchefstroom and Polokwane 

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We have a range of dry ice blasters available for sale. We can also service and repair your blaster. 

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About Us 

Dry Ice International has been recognised as the leader in dry ice manufacturing, distribution and dry ice blast cleaning in South Africa, as well as other parts of Africa since 1994. 

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Contact Us 

012 810 0500 

info@dryice.co.za 

259 Vonkprop Street, Silverton, Pretoria, Gauteng, South Africa 

24 Hour Emergency numbers 

Gauteng 

083 375 6627 

Kwazulu Natal 

031 569 6209 

Western Cape 

083 243 6483 

Eastern Cape 

083 243 6483 

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