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BNSF molten sulfur train derails at Custer, WA

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BNSF molten sulfur train derails at Custer, WA
Posted by diningcar on Thursday, June 6, 2024 8:41 AM

Does anyone have details? All I found was the headline.

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Posted by caldreamer on Thursday, June 6, 2024 10:42 AM

Here is the latest as of 4:53PM yesterday from the Bellingham newspaper. Six cars derailed.  The train was carrying molton sulfur. No spilsl or injuries. The line is closed while they clean up the derailment.

 

Train carrying molten sulfur derails in Whatcom County; BNSF investigation underway

By Jack Belcher Updated June 05, 2024 4:53 PM

 

An investigation is underway after a train derailed in Whatcom County on Tuesday night, June 4, 2024. The train, which was carrying molten sulfur, derailed around 10:45 p.m. near Custer. Six cars were derailed in the incident, according to BNSF. No injuries or spills were initially reported, according to Chief Jason Van der Veen with North Whatcom Fire and Rescue. “Our Division of Emergency Management has processes in place to support first responders in events such as this,” said Sheriff Donnell “Tank” Tanksley in a news release about the incident. “Our priority is always life safety, and it is gratifying that there was and is no risk to the public from this event.” There are also no reports of damage to private property, Van der Veen told The Bellingham Herald. BNSF employees and North Whatcom Fire and Rescue arrived to investigate the cause around midnight, Van der Veen told The Herald. BNSF is leading the ongoing investigation. The Herald has reached out to BNSF, the Washington Department of Ecology, the Federal Railroad Administration and the National Transportation Safety Board for more information. “We will continue to monitor developments, and respond as appropriate,” Tanksley said in the news release. Portal Way between Valley View and Arnie Road is closed due to the derailment and is expected to remain closed for the rest of the day, according to a Whatcom County Sheriff’s Office Facebook post.

 

 

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Posted by blue streak 1 on Friday, June 7, 2024 1:11 AM

How long before it freezes?  Doe it expand when it freezes and can cars adapt to that expansion?

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Posted by BaltACD on Friday, June 7, 2024 11:09 AM

blue streak 1
How long before it freezes?  Doe it expand when it freezes and can cars adapt to that expansion?

Sulphur is loaded into tank cars as a liquid (molten).  At normal 'room temperatures' that sulphur becomes a solid.  The consignees of molten sulphur, upon getting the cars in their plant hook the cars up to a steam supply which heats the contents back to a liquid state so the commodity can be unloaded.

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Posted by Shadow the Cats owner on Saturday, June 8, 2024 7:03 PM

We haul it from several refineries around here.  The driver's call it the best running liquid tank load in the world.  You're required to have the X endorsement to haul it but it's as solid as a rock in the trailer at room temperature.  

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Posted by CSSHEGEWISCH on Tuesday, June 11, 2024 10:05 AM

Shadow the Cats owner

We haul it from several refineries around here.  The driver's call it the best running liquid tank load in the world.  You're required to have the X endorsement to haul it but it's as solid as a rock in the trailer at room temperature.  

 

Not too surprising.  The melting point of sulfur is 115 degrees Celsius.

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Posted by Shadow the Cats owner on Wednesday, June 12, 2024 6:45 AM

We laugh when the customer says must be kept heated while in shipment.  We go why our coolant heaters don't have enough heat to keep it liquid.  They run at under 100 C max unless the engine is running hotter than that pulling a hill.  

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Posted by JC UPTON on Wednesday, June 12, 2024 7:22 AM

BaltACD

 

 
blue streak 1
How long before it freezes?  Doe it expand when it freezes and can cars adapt to that expansion?

 

Sulphur is loaded into tank cars as a liquid (molten).  At normal 'room temperatures' that sulphur becomes a solid.  The consignees of molten sulphur, upon getting the cars in their plant hook the cars up to a steam supply which heats the contents back to a liquid state so the commodity can be unloaded.

 

Solid Sulphur is more dense than the liquid; it shrinks when it "freezes"

          Liquid (molten) Sulphur: weighs 1 800 kg/m³

          Solid Sulphur:  weighs 2 070 kg/m³  

 

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Posted by BaltACD on Wednesday, June 12, 2024 8:03 AM

JC UPTON
 
BaltACD 
blue streak 1
How long before it freezes?  Doe it expand when it freezes and can cars adapt to that expansion?

Sulphur is loaded into tank cars as a liquid (molten).  At normal 'room temperatures' that sulphur becomes a solid.  The consignees of molten sulphur, upon getting the cars in their plant hook the cars up to a steam supply which heats the contents back to a liquid state so the commodity can be unloaded. 

Solid Sulphur is more dense than the liquid; it shrinks when it "freezes"

          Liquid (molten) Sulphur: weighs 1 800 kg/m³

          Solid Sulphur:  weighs 2 070 kg/m³  

As opposed to Water, which as we know - expands when it freezes

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Posted by Overmod on Wednesday, June 12, 2024 9:52 AM

BaltACD
The consignees of molten sulphur, upon getting the cars in their plant hook the cars up to a steam supply which heats the contents back to a liquid state so the commodity can be unloaded.

Note that the steam has to be supplied at sufficient saturation pressure that it will be 'hot' enough to melt the sulfur, with a heat-transfer area that liquefies the contents in a reasonable time.  

Optimal 'handling temperature' is about 140 to 150 C, which translates into steam pressure of about 65 - 85psi.  Higher pressure might be used for 'faster' melting of bulk sulfur in the tank; istr references up to about 120psi.

Note that the transfer lines are often steam-jacketed as well as insulated.  Sulfur is not quite as wretched as high-melting NaK if it freezes in the lines... but it's still plenty wretched to deal with.

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Posted by Erik_Mag on Wednesday, June 12, 2024 11:21 PM

With NaK, one could run a current through it to warm it up.

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Posted by Overmod on Thursday, June 13, 2024 11:16 AM

Wouldn't you need god-level current density, especially since you have to treat it as parallel resistance in a metallic pipe

https://www.osti.gov/servlets/purl/5935241

Better just to use the eutectic around NaK-77, and arrange controlled higher-temperature atmosphere around parts of the system affected by lower ambient temperature...

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