AEM Bulletin Warns of Static Electricity Risks with Low Sulfur Fuel

June 12, 2013

A new bulletin from the Association of Equipment Manufacturers warns of ignition hazards associated with use of Ultra Low Sulfur Diesel. The bulletin — ULSD…Not Your Same Old Diesel Fuel Anymore — contends that ULSD could cause ignition hazards because of greater static electricity.

With federal regulations mandating ULSD use, AEM undertook the educational outreach to help inform machine operators and others on farm or construction jobsites about ULSD characteristics that can affect safety during refueling.

The bulletin explains that the removal of sulfur and other compounds in ULSD fuel decreases its conductivity and increases its ability to store static charge. “Static electricity discharge when combustible vapors are present could result in a fire or explosion,” the bulletin says.

The bulletin urges industry workers to consult with their fuel or fuel system suppliers to ensure the delivery system is in compliance with fueling standards for proper grounding and bonding practices.

The bulletin was developed by a multi-sector AEM ad hoc committee of member companies such as the American Rental Association, Engine Manufacturers Association, North American Equipment Dealers Association and others.

“About 90 percent of off-road equipment is run on diesel and at one time the fuel had upwards of 5,000 ppm sulfur content compared with 15 pm today,” said Mike Weber, AEM technical and safety services manager. “ULSD is now required for on-highway and off-highway applications in the North American market and we need to educate users who may be unaware of the changes in the physical properties of ULSD and the potential for harm during refueling.”

The bulletin can be downloaded from the AEM website at www.aem.org