DOT-117 defined

Written by David Thomas, Canadian Contributing Editor
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The wait for a new tank car specification is over. Now comes the “fun” part: Retrofits to older cars, and potentially onerous operating rules.

The final spec for the now-official DOT-117 (TC-117 in Canada) non-pressurized tank car adopts the most demanding of the technical requirements first offered for comment in the notice of rulemaking: jacketed and thermally insulated shells of 9/16-inch steel, full-height half-inch-thick head shields, sturdier, re-closeable pressure relief valves, and rollover protection for top fittings.

Of most concern to carbuilders and buyers is the tight timeline for the retrofitting or retirement of existing DOT-111s and the newer industry-sponsored CPC-1232 cars constructed since 2011, before the 2013 disaster at Lac-Mégantic forced regulators to finally heed years of warnings by accident investigators in the U.S. and Canada. Those “good faith” cars now need to be upgraded to meet DOT-117 standards by May 1, 2025.

The phaseout/retrofit schedule will see unjacketed DOT-111s removed from the most-volatile Packing Group I crude oil service by January 2018, jacketed DOT-111s by March 2018, unjacketed CPC-1232s by April 2020. For Packing Group II, jacketed and non-jacketed DOT-111s may remain in service until May 2023, non-jacketed CPC-1232s until July 2023, and jacketed CPC-1232s until May 2025.

To enforce the timeline, the regulations require stricter testing and classification of crude oil offered for transport.

The regulatory package is to be enforced by the USDOT’s sibling regulators, the Federal Railroad Administration (FRA) and the Pipeline and Hazardous Materials Safety Administration (PHMSA).

Cost of fleet renewal is estimated by regulators to be about $1.7 billion. Total costs for the entire regulatory package, including train routing and speed restrictions, is projected to be $2.5 billion.

The regulations remove the burden of reporting every oil train movement to state emergency response agencies. Instead, railroads must promptly respond to requests for information initiated by local emergency responders. This should address railroad complaints that business and security concerns were being compromised by state freedom of information laws.

The rule requires HHFTs (high-hazard flammable trains), defined as consisting of a continuous block of 20 or more tank cars or 35 or more cars dispersed through a train loaded with a flammable liquid, to have in place a two-way end-of-train (EOT) device or a distributed power (DP) braking system. HHFTs are limited to 50 mph, with a conditional 40 mph maximum in densely populated urban areas.

Trains meeting the definition of a “HHFUT” (high-hazard flammable unit train), defined as “a single train with 70 or more tank cars loaded with Class 3 flammable liquids,” with at least one tank car with Packing Group I materials, must be operated with an electronically controlled pneumatic (ECP) braking system by Jan. 1, 2021, or reduce maximum speed to 30 mph. All other HHFUTs must have ECP braking systems installed after 2023.

The urban speed limit will be lifted for trains consisting entirely of new or retrofitted cars meeting the DOT-117 requirements.

Even as he announced May 1 (jointly with Transport Canada Minister Lisa Raitt) that all unit oil trains must be equipped with ECP by 2023, Transportation Secretary Anthony Foxx anticipated legal challenges from railroads and fleet operators who say the technology is unreliable and unnecessary. Indeed, railroaders and shippers were quick to declare their objections to ECP requirement.

“This is an imprudent decision made without supporting data or analysis,” said Ed Hamberger, president of the Association of American Railroads. “The ECP brake requirement ordered today by the Department of Transportation is an ‘operational requirement’ and is not part of the PHMSA tank car standard rulemaking. The requirement for ECP brakes is aimed at tank cars, not locomotives. Railroads don’t own tank cars, they own locomotives. While the requirement for ECP brakes is aimed at tank cars, not locomotives, by default, locomotives will have to be ECP-equipped to be able to move cars with ECP brakes. The decision whether or not to equip tank cars moving crude oil belongs to freight rail customers or tank car owners, not the freight railroads. If tank car owners decide not to equip tank cars intended for crude oil service, railroads must decide whether or not to move trains carrying 69 or fewer crude oil tank cars or travel no faster than 30 mph. Either scenario will decrease rail capacity and have negative consequences on both freight and passenger traffic.” Railroads objected to compulsory ECP after it was proposed in the DOT’s NPRM last August, saying braking distributed via mid-train locomotives and end-of-train devices would be just as effective.

The American Petroleum Institute said the ECP requirement will further stress an already impossible timeline for total fleet renewal. It warned that oil shortages will result as existing tank cars are withdrawn before builders can replace them: “We support upgrades to the tank car fleet and want them completed as quickly as realistically possible. The railcar manufacturing industry’s own calculations show it does not have the shop capacity to meet the retrofit timeline announced today, which will lead to shortages that impact consumers and the broader economy.”

Tank car manufacturers, however, greeted the timeline as “aggressive but appropriate.” Railway Supply Institute President Tom Simpson joined the chorus against ECP, saying “technical and logistical challenges” may not make ECP better than conventional distributed braking.

This may be the first time regulators have distinguished between packing groups with respect to tank car choice. Currently, all three packing groups may be carried in identical cars, the only difference being in the hazmat placarding and documentation. The timeline for tank car retirement or retrofitting is also tied to the lading’s packing group.

One intended effect is to allow older tank cars to transition from higher-risk crude to lower-risk ethanol service during fleet renewal. Gone from the final rules is the strategy to shift riskier cars to Alberta tar sands service, now that diluted or synthetic bitumen proved itself to be unexpectedly explosive in a pair of midwinter mishaps in northern Ontario.

Without much explanation, the final rules excluded incentives to encourage voluntary degasification or stabilization of crude oil before loading. But Foxx hinted at more to come in subsequent rulemaking initiatives, saying the quest for safer transportation of crude oil will now become a multi-departmental effort, with a focus on the volatility of the cargo.

Not surprisingly, The Greenbrier Companies was quick to point out that its “Tank Car of the Future” is, in effect, a DOT/TC-117, strongly suggesting that regulators simply adopted its design as the new spec. “Greenbrier announced its Tank Car of the Future in February 2014, a safer design . . . that the USDOT and TC introduced today as the new DOT-117/TC-117,” said Chairman and CEO Bill Furman. “We’re currently delivering cars to our customers that meet these new standards. Nearly 1,000 of these tank cars are already in Class 3 flammable liquids service across North America. With orders in place for more than 2,500 of these cars, safer tank cars are steadily joining the North American rail fleet. Greenbrier believes that by mandating the new DOT-117/TC-117 tank cars be built with features such as increased shell thickness, full-height, half-inch-thick head shields, minimum 11-gauge jackets, a re-closeable pressure relief valve and thermal protection, the U.S. and Canada have taken steps to mitigate the consequences of train accidents and will ultimately enhance public safety. These tank car design improvements produce tangible and immediate safety benefits that far exceed any marginal benefit from US DOT-mandated ECP brakes, which Greenbrier has consistently questioned.

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