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Tyre Tear Out at Low Temperatures

11/08/2015 10:32 AM

On the same oil derrick job (Some oil derricks on the north slope of Alaska failed catastrophically when a blizzard blew in. Analysis showed the wind had literally blew the rigs apart with the SAE 416 Stainless steel being fractured into small pieces without deformation. Analysis also showed that the design was fine, there were no external environmental or chemical or mechanical (other than 60 kph wind and -65 °C temperatures) influences that caused failure, bringing attention onto SAE 416 Stainless used in the construction.), all four tires on a Range Rover failed catastrophically while driving from rig to rig during the storm. It looked like someone had torn the tires into pieces, but they couldn't have as vehicle is driven at that time. Security video showed nobody near the vehicle when it was parked. The tires were made of E-SBR. What could have happened? Can there be a solution so that next time this does not repeat ?

My explanation: SBR is not resistant to oil or fuel resistant and it can be prone to weathering.More over SBR sustains temperarutes above -50 degree centigrade . so too low a temperature and the tires will 'Cold Tear' too high and the tires will harden and go off.When a tire starts out cold and is worked on the road / track surface the temperature rises, as the temperature rises the surface rubber is removed at a faster rate than when the tire is up to operating temperature. The discarded surface rubber forms little balls at the working edge. This Cold Tearing or Cold Shreading reduces the life of the tire. We should use tyre warmers to avoidthis . Am i right ??

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#1

Re: Tyre tear out at low temperatures

11/08/2015 10:48 AM

Tyres made from SBR have a glass transition temperature of -50°C.

The tyres would shatter at -65°C.

Use tyre warmers or buy tyres made from other materials.

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#2

Re: Tyre Tear Out at Low Temperatures

11/08/2015 12:41 PM
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#3
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Re: Tyre Tear Out at Low Temperatures

11/08/2015 12:51 PM

This approach will not work.

Tire manufacturers already know what to use for low temperature applications.

OP should simply specify low temperature tires.

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#4
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Re: Tyre Tear Out at Low Temperatures

11/08/2015 1:16 PM

OK these guys should be able to help....

http://www.alaskatireservice.net/productgroups.htm?custom=3

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#5
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Re: Tyre Tear Out at Low Temperatures

11/08/2015 2:25 PM

Probably so.

But, you'd have to think that any company working oil derricks on the north slope of Alaska would know what tires to buy.

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#6
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Re: Tyre Tear Out at Low Temperatures

11/08/2015 2:51 PM

Maybe he's a new guy.....

I would go with those track thingys...

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#7
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Re: Tyre Tear Out at Low Temperatures

11/08/2015 3:33 PM

That would do it for me.

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#8

Re: Tyre Tear Out at Low Temperatures

11/08/2015 6:32 PM

With regard to the comment about the rig failure, the data sheet by:

http://www.interlloy.com.au/our-products/stainless-steel/416-martensitic-stainless-steel-bar/

Includes the following statements, would lead me to wonder if the derricks suffered some type of fatigue failure due to wind induced oscillations; but, a 65 kph wind speed seems too low to have induced such oscillations unless the derrick towers were hanging a substantial number of drill pipe joints that might have been induced to swing by gusting winds.

Low Temperature Properties

416 is not recommended for use at sub-zero temperatures due to a substantial drop in impact properties consistent with most steels other than the austenitic steel types.

Cold Bending

416 has limited cold bending properties and it is generally not recommended.
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#9

Re: Tyre Tear Out at Low Temperatures

11/09/2015 10:30 AM

"On the same oil derrick job (Some oil derricks on the north slope of Alaska failed catastrophically when a blizzard blew in. Analysis showed the wind had literally blew the rigs apart with the SAE 416 Stainless steel being fractured into small pieces without deformation. Analysis also showed that the design was fine, there were no external environmental or chemical or mechanical (other than 60 kph wind and -65 °C temperatures) influences that caused failure, bringing attention onto SAE 416 Stainless used in the construction.), all four tires on a Range Rover failed catastrophically while driving from rig to rig during the storm. It looked like someone had torn the tires into pieces, but they couldn't have as vehicle is driven at that time. Security video showed nobody near the vehicle when it was parked. The tires were made of E-SBR. What could have happened? Can there be a solution so that next time this does not repeat?"

From Lyn: "Tyres made from SBR have a glass transition temperature of -50°C.

The tyres would shatter at -65°C."

From JAlberts: "416 [Stainless Steel] is not recommended for use at sub-zero temperatures due to a substantial drop in impact properties consistent with most steels other than the austenitic steel types."

I believe my advice would be to put on your best pair of snowshoes and get away from that facility as fast as you can. It was not planned out well, it's being poorly managed, and it WILL claim lives. I assume you do not want to be one of those fatalities, so get away while you can.

(On a semi-political sidenote, if these clowns couldn't even get the right materials for equipment safety in the region, how can we trust them to do the drilling and pumping without destroying the environment? Before you complain, let me point out that A) Northern Alaska has an 'environment,' if you bother to look, you'll find some wildlife either living there or using it as a migration route, and B) we also need to look at shipping the oil, either by pipeline, which may be getting the same 'care and maintenance' as those oil rigs, or by boat, and if they've got rigs blowing apart from the cold because they didn't use the right materials, how do we know they're not also 'saving money' by using similarly substandard captains. Exxon Valdiez II, anyone?)

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#10

Re: Tyre Tear Out at Low Temperatures

11/09/2015 12:13 PM

I feel so much better about drilling in Alaska now.

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