Petroleum Products, Lubricants, and Fossil Fuels. C515-13(2018) - Standard Specification for Chemical-Resistant Ceramic Tower Packings C559-16(2020) - Standard Test Method for Bulk Density by Physical Measurements of Manufactured Carbon and Graphite Articles C560-20 - Standard Test Methods for Chemical Analysis of Graphite. C561-16 - Standard Test Method for Ash in a Graphite Sample