Fremgangsmåde til gravefri lægning af plaströr, især flerlagsrör

Testing system for plastic pipe laid underground comprises a number of helical electric conductors attached to the pipe wall, either in between layers in a multi-layer pipe of as close as possible to the outer wall in a single layer pipe. By connection of a current at one end of a pipe and a current...

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Bibliographische Detailangaben
1. Verfasser:	SPAETH THORSTEN
Format:	Patent
Sprache:	dan
Schlagworte:	BLASTING EARTH DRILLING EARTH DRILLING, e.g. DEEP DRILLING ENGINEERING ELEMENTS AND UNITS FIXED CONSTRUCTIONS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING JOINTS OR FITTINGS FOR PIPES LIGHTING MEANS FOR THERMAL INSULATION IN GENERAL MEASURING MEASURING ELECTRIC VARIABLES MEASURING MAGNETIC VARIABLES MECHANICAL ENGINEERING MINING OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS PHYSICS PIPE-LINE SYSTEMS PIPE-LINES PIPES STORING OF DISTRIBUTING GASES OR LIQUIDS SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING TESTING THERMAL INSULATION IN GENERAL WEAPONS
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Beschreibung
Zusammenfassung:	Testing system for plastic pipe laid underground comprises a number of helical electric conductors attached to the pipe wall, either in between layers in a multi-layer pipe of as close as possible to the outer wall in a single layer pipe. By connection of a current at one end of a pipe and a current meter at the other end it can be immediately determined if the pipe is damaged or not.