Mercedes Mullins
Nonroad, Locomotive, or Marine (NRLM) diesel fuel is any diesel fuel used in nonroad diesel engines, including locomotive and marine diesel engines. In 2007, the US Environmental Protection Agency (EPA) began phasing in low-sulfur (500 ppm) and ultra-low sulfur diesel (ULSD) (15 ppm) fuel for NRLM diesel, reducing sulfur levels in diesel fuel from 5000 ppm. These standards aimed to reduce harmful emissions from engines and equipment by more than 90%. NRLM diesel fuel is subject to different regulations and standards, such as the Tier 4 program's cetane index/aromatics specifications and exemptions for use in Alaska.
NRLM Diesel Fuel Characteristics
| Characteristics | Values |
|---|---|
| Definition | Nonroad, locomotive, or marine (NRLM) diesel fuel means any diesel fuel or other distillate fuel that is used, intended for use, or made available for use, as a fuel in any nonroad diesel engines, including locomotive and marine diesel engines. |
| Sulfur Limit | 500 ppm (from June 2007) |
| Sulfur Limit | 15 ppm (from June 2010 for nonroad fuel, from June 2012 for locomotive and marine fuels) |
| Aromatics Limit | Minimum cetane index of 40 or a maximum of 35% by volume |
| Exemption | Heavy fuel oils (HFO) used in Category 2 and Category 3 marine diesel engines |
| Exemption | Distillate fuel with a T90 at or above 700 F that is used only in Category 2 and 3 marine engines |
| Exemption | ECA marine fuel |
| Exemption | Distillate fuel used in aircraft |
| Exemption | Fuels for which a national security or research and development exemption has been approved |
| Exemption | Fuel that is exported from the USA |
| Applicable Engines | All NRLM engines and equipment (with some exceptions for older locomotive and marine engines) |
| Applicable Areas | Alaska (accessible and non-accessible by the Federal Aid Highway System) |
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What You'll Learn
- NRLM diesel fuel is used for nonroad, locomotive, and marine diesel engines
- The EPA regulates NRLM diesel fuel sulfur levels
- NRLM diesel fuel is exempt from red dye requirements in certain areas of Alaska
- CARB diesel is a type of NRLM fuel used in California
- NRLM diesel fuel has different sulfur level requirements than regular diesel fuel
NRLM diesel fuel is used for nonroad, locomotive, and marine diesel engines
Nonroad Locomotive and Marine NRLM diesel fuel is used for nonroad, locomotive, and marine diesel engines. It is a type of diesel fuel or distillate fuel used in nonroad diesel engines, including locomotive and marine diesel engines. NRLM diesel fuel is subject to specific regulations and standards regarding sulfur content and emissions.
The Environmental Protection Agency (EPA) has implemented regulations to reduce sulfur levels in diesel fuel, including NRLM diesel. In 1993, the EPA began regulating diesel fuel sulfur levels, and in 2006, more stringent regulations were phased in to lower the sulfur content to 15 parts per million (ppm), known as ultra-low sulfur diesel (ULSD). These regulations apply to both on-road and non-road diesel fuel, as well as locomotive and marine fuel. The Tier 4 program extends the cetane index/aromatics specification for highway fuel to NRLM diesel fuel, requiring a minimum cetane index of 40 or a maximum of 35% aromatics by volume.
NRLM diesel fuel is exempt from the red dye requirements and the marker solvent yellow 124 requirements specified in EPA regulations. However, pump labels for NRLM diesel fuel that is commingled with motor vehicle diesel fuel must indicate the applicable sulfur level and time frame. For example, 500 ppm sulfur diesel fuel was specified for use from June 1, 2006, through September 30, 2010, while 15 ppm sulfur diesel fuel (ULSD) became effective in June 2010 for nonroad fuel and in June 2012 for locomotive and marine fuels.
There are also geographical considerations for the use of NRLM diesel fuel. In Alaska, NRLM diesel fuel used in areas accessible by the Federal Aid Highway System is subject to the provisions of 40 CFR part 80, subpart I. In contrast, NRLM diesel fuel used in areas not accessible by the Federal Aid Highway System is subject to different implementation dates and regulations. Additionally, heavy fuel oils (HFO) used in Category 2 and Category 3 marine diesel engines are exempt from the sulfur requirements for NRLM fuels.
Overall, NRLM diesel fuel plays a crucial role in powering nonroad, locomotive, and marine diesel engines, and its use is carefully regulated to ensure compliance with emissions standards and to reduce harmful air pollution.
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The EPA regulates NRLM diesel fuel sulfur levels
The US Environmental Protection Agency (EPA) regulates diesel fuel sulfur levels to reduce harmful emissions from highway vehicles, nonroad engines, and equipment. Before the EPA began regulating sulfur in diesel fuel, it contained up to 5,000 parts per million (ppm) of sulfur. The EPA started regulating diesel fuel sulfur levels in 1993.
In 2006, the EPA began phasing in more stringent regulations to lower the amount of sulfur in diesel fuel to 15 ppm, known as ultra-low sulfur diesel (ULSD). This applied to on-road diesel fuel, and by 2010, all highway diesel fuel supplied to the market and used in highway diesel vehicles had to be ULSD.
For nonroad, locomotive, and marine (NRLM) diesel fuel, the EPA implemented a phase-in period from 2007 to 2014 for low sulfur (500 ppm) and ULSD (15 ppm) fuel. After 2014, all NRLM diesel fuel was required to be ULSD, and all NRLM engines and equipment must use this fuel, except for older locomotive and marine engines.
The EPA is also proposing regulatory changes to accommodate the distribution and sale of distillate diesel fuel that complies with the 0.50 percent (5000 ppm) global sulfur standard for marine fuel. Ocean-going vessels and large ships traditionally used "bunker fuel," which contained up to 5% or 50,000 ppm of sulfur and was a significant source of harmful air pollution.
Additionally, under an international treaty through the International Maritime Organization, the EPA and the US Coast Guard established two Emission Control Areas (ECA) covering US waters. Beginning in 2015, large marine diesel engines operating within the ECAs must use fuel with 1,000 ppm sulfur or less, resulting in significant emissions reductions.
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NRLM diesel fuel is exempt from red dye requirements in certain areas of Alaska
In the United States, the Environmental Protection Agency (EPA) regulates fuel quality as per the Clean Air Act Amendments of 1990. These regulations aim to reduce harmful emissions from vehicles, engines, and equipment. To that end, the EPA has set standards for diesel fuel, including NRLM diesel fuel.
NRLM diesel fuel refers to Nonroad, Locomotive, or Marine diesel fuel. It is a type of diesel fuel used in nonroad diesel engines, locomotive engines, and marine engines. NRLM diesel fuel is subject to specific regulations regarding sulfur content and emissions standards.
In the context of Alaska, NRLM diesel fuel is exempt from certain dye requirements. Specifically, NRLM diesel fuel used in areas of Alaska not accessible by the Federal Aid Highway System is exempt from the red dye requirements under 40 CFR 80.520(b)(2) and 80.510(d)(5), (e)(5), and (f)(5). This exemption is specified in the Electronic Code of Federal Regulations (e-CFR).
The red dye requirement is typically applicable to diesel fuel intended for non-highway purposes. However, in the case of NRLM diesel fuel used in remote areas of Alaska, this requirement is waived. This exemption ensures that NRLM diesel fuel can be utilized in regions of Alaska that are not connected to the federal highway system.
It is important to note that NRLM diesel fuel in Alaska is still subject to other regulations, such as those outlined in 40 CFR part 80, subpart I. These regulations pertain to sulfur levels and emission control standards, which are crucial for reducing air pollution and maintaining environmental standards.
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CARB diesel is a type of NRLM fuel used in California
CARB, or the California Air Resources Board, is responsible for developing statewide programs and strategies to reduce pollutants, toxics, and climate-changing emissions from diesel-fuelled vehicles. CARB diesel is a type of NRLM fuel used in California.
NRLM, or nonroad, locomotive, and marine, diesel fuel is subject to specific regulations regarding sulfur content. Before the EPA began regulating sulfur in diesel fuel, it could contain as much as 5,000 parts per million (ppm) of sulfur. Since 2014, NRLM diesel fuel has been required to be ultra-low sulfur diesel (ULSD), with a maximum sulfur content of 15 ppm.
Some exceptions exist for locomotive and marine fuel, such as distillate fuel used in aircraft and fuels for which a national security or research and development exemption has been approved. Additionally, there are transitional flexibility provisions, such as the diesel sulfur credit banking and trading program, which allowed for the accumulation of sulfur credits for the early introduction of low-sulfur fuels.
In California, CARB-24 Omnibus-compliant engines, such as the Volvo Trucks' D13 VGT diesel engine, are designed to meet the state's low NOx emissions requirements. This engine also features improvements in efficiency and reduced particulate matter emissions. CARB diesel fuel standards and regulations are crucial in California to address the state's complicated emissions compliance landscape and ensure the reduction of smog-forming pollutants.
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NRLM diesel fuel has different sulfur level requirements than regular diesel fuel
Nonroad, Locomotive, and Marine (NRLM) diesel fuel refers to any diesel fuel used in nonroad diesel engines, including locomotive and marine diesel engines. NRLM diesel fuel has different sulfur requirements compared to regular diesel fuel.
Before the US Environmental Protection Agency (EPA) began regulating sulfur levels in diesel fuel in 1993, diesel fuel contained as much as 5,000 parts per million (ppm) of sulfur. Since then, the EPA has implemented stricter regulations to reduce sulfur levels in diesel fuel.
In 2006, the EPA introduced the Ultra-Low Sulfur Diesel (ULSD) standard, limiting sulfur in on-road diesel fuel to a maximum of 15 ppm. This standard was extended to nonroad diesel fuel in 2010 and to locomotive and marine fuel in 2012.
NRLM diesel fuel, on the other hand, has different sulfur requirements. From 2007 to 2014, the sulfur limit for NRLM diesel fuel was phased in at 500 ppm. This was a significant reduction from the previous levels, but still higher than the ULSD standard for on-road diesel fuel.
There are exemptions to the sulfur requirements for NRLM diesel fuel. For example, ECA marine fuel, used in ocean-going vessels and large ships, is exempt from the NRLM diesel fuel definition. Additionally, there are geographic exemptions, such as in Alaska, where certain NRLM diesel fuel and heating oil are exempt from the red dye requirement.
The different sulfur requirements for NRLM diesel fuel and regular diesel fuel are due to the unique characteristics and applications of nonroad, locomotive, and marine diesel engines. The EPA's regulations aim to balance emissions reductions with the specific needs of these diverse engine types.
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Frequently asked questions
NRLM stands for nonroad, locomotive, or marine diesel fuel. It is used as fuel in nonroad diesel engines, locomotive diesel engines, and marine diesel engines.
The sulfur limits for NRLM diesel fuel have changed over time. From June 1, 2007, through May 31, 2010, the limit was 500 ppm. From June 1, 2010, through May 31, 2014, the limit was 500 ppm for NRLM diesel fuel or heating oil, and 15 ppm for ULSD. After June 1, 2014, the limit for LM diesel fuel or heating oil was 500 ppm, and 15 ppm for ULSD.
ULSD stands for ultra-low sulfur diesel fuel. It has a maximum sulfur level of 15 ppm.
Yes, there are some exceptions. Heavy fuel oils (HFO) used in Category 2 and Category 3 marine diesel engines are exempt from the sulfur limits. Additionally, there are some exemptions for older locomotive and marine engines.
The sulfur limits for NRLM diesel fuel are regulated by the US Environmental Protection Agency (EPA) under the authority of the Clean Air Act Amendments of 1990. The EPA has been gradually reducing sulfur levels in diesel fuels to improve air quality and reduce harmful emissions.
