On December 20, 2007, the National Biodiesel Board announced that a biodiesel blend specification passed out of ASTM International’s D02 Subcommittee E at the semi-annual ASTM meetings held in Phoenix. According to the ballot, the biodiesel portion of the B6-to-B20 specification must meet the standard for pure biodiesel prior to blending, and the finished blend must meet the widest of the specifications for either No. 1 or No. 2 diesel.
The subcommittee also made refinements to the current standard for pure biodiesel, ASTM D 6751. Changes to the B100 blend stock specification were needed to address the potential issue of filter clogging above the cloud point with B20 and lower blends.
All of the ballots require final approval from the Main Committee at the June 2008 ASTM meeting.
