NASA SSTD-8070-0059-PIPE Rev. B, Low Pressure Aluminum Pipe Systems with Piping Designator "E", Revision (20-08-14). Active. Scope: This John C. Stennis Space Center (SSC) standard (SSTD) specifies the materials and procedures for the construction of low-pressure aluminum piping systems with Piping Designator "E" at SSC. Public Access. SSC.