7 December 2010

ASTM International intends to develop consensus standards for support testing of aqueous urea solutions used in diesel SCR systems, known as diesel exhaust fluid (DEF). Potential subjects for standards development include:

  • urea storage materials and containers,
  • identification of organic impurities,
  • determination of material suitability,
  • shelf life of the fluid,
  • distribution systems,
  • climatic impact, and
  • fluid disposal.

With support from the American Petroleum Institute (API), ASTM will be hosting an organizational meeting to discuss the development of the new standards. The meeting will take place on January 6, 2011 in West Conshohocken, PA.

Urea-SCR technology was launched around 2005 on selected Euro IV/V as well as Japanese heavy-duty diesel engines, followed by a number of other heavy- and light-duty diesel applications worldwide. In 2010, SCR was widely adopted for NOx control from US heavy-duty diesel engines. These initial SCR applications were based on European quality standards for urea solutions—called AdBlue in Europe—including the DIN 70070 and ISO 22241. The North American launch has also been supported by urea quality auditing program by the API.

Source: ASTM