I am new to the biodiesel plants and maybe you can help. I am also treating the plant building as class 1 div. 2. I do not have drawings to go by and I am trying to get an understanding on this project without much help from client. If you have any suggestions to help enlighten me I would appreciate it.don_resqcapt19 said:I wonder if biodiesel is different...we are working on a biodiesel plant and it is mostly Class I, Div 2, Group B. It could be that the classification of the plant is based on the products at the intermediate processing steps and not the final product. I am not on the job so I don't have all of the details.