BS 4508-4:1977
Current
The latest, up-to-date edition.
Thermally insulated underground pipelines Specific testing and inspection requirements for cased systems without air gap
Hardcopy , PDF
English
30-06-1977
Foreword
Cooperating organizations
Specification
1 Scope
2 References
3 Definitions
4 General
5 Type tests and inspections
6 Production inspections and tests
7 Test failure interpretation
8 System approvals
Appendix
A Soil conductivity data
Figures
1 Joint testing apparatus to simulate actual operating
conditions
2 Physical variations during a four-hour test cycle
3 Test rig for the determination of system pressure-
tightness
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