DETECTION FOR CORRODED PART OF PIPELINE

PURPOSE:To enable highly accurate detection of a corroded part of a pipeline regardless of a deformation out of roundness of the pipeline body and the existence of vibration with the running of a pig, by using a spot focusing type probe as such. CONSTITUTION:Empirically, for example, in a pipeline o...

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Bibliographische Detailangaben
Hauptverfasser:	HOSOE TOSHIAKI, AKUSAWA HIRONOBU
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES JOINTS OR FITTINGS FOR PIPES LIGHTING MEANS FOR THERMAL INSULATION IN GENERAL MEASURING MECHANICAL ENGINEERING PHYSICS PIPES SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING TESTING THERMAL INSULATION IN GENERAL WEAPONS
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Beschreibung
Zusammenfassung:	PURPOSE:To enable highly accurate detection of a corroded part of a pipeline regardless of a deformation out of roundness of the pipeline body and the existence of vibration with the running of a pig, by using a spot focusing type probe as such. CONSTITUTION:Empirically, for example, in a pipeline of a pipe body 1 with the nominal diameter of 1,200A, the flatness (f) of the pipe body 1 is mostly below + or -30mm while the eccentricity (d) of a pig 3 is normally below + or -10mm. When the oblatness f=30mm, the incident angle theta is about 1 deg. at the point Q when the change in the incident angle due to the eccentricity of the pig 3 is large. Hence, the incident angle is about 1 deg. at a point even if the point P and the point Q coincide. Thus, the use of a spot focusing type probe enables highly accurate detection of a corroded part of a pipline of the pipe body of which is deformed by oblatness =+ or -30mm under the vibration in which the pig 3 is deformed by oblatness d=+ or -10mm.