American Society for Testing and Materials (ASTM). Current edition approved March 1, 2007. Published April 2007. Originally approved in 1984. Last previous edition approved in 2002 as A 836/A 836M – 02. 2 p, This specification covers nonstandard as-forged fittings, valve components, and parts for glass-lined piping and pressure vessel service. Mechanical properties are certified on the basis of test material subjected to heat treatments to simulate glass-coating operations.