BS-4508-1 Complete Document History
Thermally insulated underground pipelines

Complete Current Edition:
   1986 EDITION - Reaffirmed in 2012 - May 30, 1986
   AMD 7727 - AMENDMENT 1 - July 1, 1993

Obsolete Revision Information:
   1969 Edition - Thermally insulated underground pipelinesSteel cased systems - Oct. 8, 1969