This test method is primarily for sampling particulates in hydrogen fuel used in hydrogen fuel cell vehicles or gaseous hydrogen powered internal combustion vehicle engines up to pressures of 70 MPa (700 bars) using an in-stream filter. This test method describes sampling apparatus design, operating procedures, and quality control procedures required to obtain the stated levels of precision and accuracy.
Available from https://www.astm.org/d7650-13.html. Proposed revision, WK64094.This method is using a potentially obsolete method for sampling. We are forming a collaboration to discuss how this sampling is actually performed in the field to update the specification accordingly. We want to expand the scope of this method to include natural gas as well.