• Title/Summary/Keyword: Band-Typed Indication

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Interpretation for Band-Type Indication on Radiography of 9% Ni Steel Welds for LNG Storage Tanks (액화천연가스 저장탱크 9% 니켈강 용접부의 방사선투과시험 필름에 나타나는 밴드형상의 지시 해석)

  • Lee, Seung-Hyun;Lee, Seung-Rim;Lee, Young-Soon
    • Journal of the Korean Society for Nondestructive Testing
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    • v.30 no.5
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    • pp.479-483
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    • 2010
  • 9% nickel alloy steels used for LNG, cryogenic liquid, storage tank are welded with dissimilar Inconel or Hastelloy welding rod and the weldment shows similar characteristic with the dissimilar metal weld of low carbon steel and austenitic stainless steel. Band type indications are sometimes shown on the film during radiography test of the weldments. Thus this study identified whether the indications are non-relevant indications through material, radiographic test, ultrasonic test, liquid penetrant test and microstructure analysis and also proposed radiography film interpretation and cause of band type indications.