김정우
2009-01-30 17:36:27
5
1979
안녕하세요.
용접 방법중에 Fillet 용접 및 Full Penetration 용접이 있는데
이중 Full Penetration용접의 정의를 알고자 합니다.
저가 알기로...
모재가 가진 두께만큼 용접개선하여 완전 용입 용접으로 알고 있습니다.
용접 방법중에 Fillet 용접 및 Full Penetration 용접이 있는데
이중 Full Penetration용접의 정의를 알고자 합니다.
저가 알기로...
모재가 가진 두께만큼 용접개선하여 완전 용입 용접으로 알고 있습니다.
Full Penetration Weld refers to the configuration of the weld preparation that a weld has that covers 100% of the required thickness* of the plate/part or plates/parts to be welded without notch effect** in the butt, fillet, corner, and other joints.
* the thinner thickness in dissimilar thickness joint
** unacceptable undercut & LF or others in the weld.
Meanwhile the weld edge preparation is not directly related with the full penetration welding.
* the thinner thickness in dissimilar thickness joint
** unacceptable undercut & LF or others in the weld.
Meanwhile the weld edge preparation is not directly related with the full penetration welding.
The Full Penetration for the Joint Efficiency (1.0) is a necessary condition, but not a sufficient condition.
The J.E or JGF* = 1.0 (as a maximum) is only applicable to butt joint in ASME. But the lower values (i.e., 0.95, 0.85, 0.7, etc.) on the butt joint depend on RT application type (100%, full, spot, no, etc.), seam type (straight, spiral, etc.), butt type (single or double), and deposit height per code.
*JQF = Joint Quality Factor
See the attachment.
JointEfficiencyandQualityFactor.pdf
The J.E or JGF* = 1.0 (as a maximum) is only applicable to butt joint in ASME. But the lower values (i.e., 0.95, 0.85, 0.7, etc.) on the butt joint depend on RT application type (100%, full, spot, no, etc.), seam type (straight, spiral, etc.), butt type (single or double), and deposit height per code.
*JQF = Joint Quality Factor
See the attachment.
JointEfficiencyandQualityFactor.pdf
공지사항
그런데 반드시 모재의 두께 만큼에 해당하는 개선을 가공하여 용접을 진행할 필요는 없습니다.
개선이 없이 그냥 맞대기 제살 용접으로 혹은 용접봉이 적용된 상태에서 모재의 두께(강도)에 준한 용접부를 만든다면 그것도 Full Penetration이리고 할 수 있습니다.
그리고 참고로 Full Penetration을 통해 Weldmetal을 만드는 방법에는 Conductive Penetration과 Key Hole Penetration의 두가지 방법으로 세분하기도 합니다.