NASA SSTD-8070-0080-PIPE Rev. A, Allowable Leak Standard, Revision (20-08-14). Active. Scope: This John C. Stennis Space Center (SSC) standard (SSTD) outlines the allowable leakage for existing gas distribution systems at SSC. It defines the leakage which is acceptable and those which require repair. Allowable leakage for new systems is covered under existing standards. Public Access. SSC.
