Global Patent Index - EP 1728895 A1

EP 1728895 A1 20061206 - Surveillance method for detecting the approach of a conductive body to a cathodically protected pipeline for fluids

Title (en)

Surveillance method for detecting the approach of a conductive body to a cathodically protected pipeline for fluids

Title (de)

Ein Überwachungsverfahren zum Feststellen einer Annäherung eines leitfähigen Körpers an eine mit einem kathodischen Schutzstrom beaufschlagte Fluid-Transportpipeline

Title (fr)

Méthode de surveillance pour détecter l'approche d'un corps conducteur à un pipeline pour fluides cathodiquement protégé

Publication

EP 1728895 A1 20061206 (DE)

Application

EP 06006493 A 20060329

Priority

DE 102005025824 A 20050602

Abstract (en)

The pipeline (1), for gas or oil or water, carries a cathode protective current for voltage values (U1,U2) to be measured at given time intervals at least at two measurement points (3). A change in the difference between the measurements indicates the approach of a conductive body between the measurement points e.g. a construction vehicle and the like, which could damage the pipeline and also shows any pipeline damage and its location. The measurement points are =25 km apart and preferably at =5 km intervals.

IPC 8 full level

C23F 13/04 (2006.01); G01R 27/14 (2006.01); G01R 27/18 (2006.01)

CPC (source: EP)

C23F 13/04 (2013.01)

Citation (search report)

  • [X] DE 10021994 A1 20011108 - RUHRGAS AG [DE], et al
  • [X] US 2004004479 A1 20040108 - FLATT DAVID WILLIAM [GB], et al
  • [A] US 6107811 A 20000822 - CAUDILL DAN L [US], et al & WERKSTOFFE UND KORROSION WEST GERMANY, vol. 38, no. 11, 1987, pages 691 - 695, ISSN: 0043-2822
  • [X] DATABASE INSPEC [online] THE INSTITUTION OF ELECTRICAL ENGINEERS, STEVENAGE, GB; November 1987 (1987-11-01), RICKERT H ET AL: "Electrochemical investigations into cathodic corrosion protection using an interruption-potentiostat", XP002385182, Database accession no. 3108662

Designated contracting state (EPC)

AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR

Designated extension state (EPC)

AL BA HR MK YU

DOCDB simple family (publication)

EP 1728895 A1 20061206; EP 1728895 B1 20090211; AT E422566 T1 20090215; DE 102005025824 A1 20061207; DE 502006002788 D1 20090326; DK 1728895 T3 20090525; ES 2322489 T3 20090622; PL 1728895 T3 20090930

DOCDB simple family (application)

EP 06006493 A 20060329; AT 06006493 T 20060329; DE 102005025824 A 20050602; DE 502006002788 T 20060329; DK 06006493 T 20060329; ES 06006493 T 20060329; PL 06006493 T 20060329