Requirements for construction, installation and testing of pipe-in-pipe thermal insulation systems for underground piping systems with a welded steel casing, enclosing the thermally insulated service or product pipe and an air gap, suitable for conveying fluids with any temperature exceeding 5°C in either wet or dry sites.
BS 4508-1:1969
Original price was: $264.16.$132.00Current price is: $132.00.
Thermally insulated underground pipelines-Steel cased systems with air gap
BSI Group , 11/28/1980
