Study on Acceptance Standards for Surface Flaw in Austenitic Steel Piping during in-Service Inspection

CHU Qibao; YAO Lin; SUN Zaozhan; MA Jingxian

Mar. 2025

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CHU Qibao, YAO Lin, SUN Zaozhan, MA Jingxian. Study on Acceptance Standards for Surface Flaw in Austenitic Steel Piping during in-Service Inspection[J]. Nuclear Power Engineering, 2012, 33(S2): 87-90.

Citation:

CHU Qibao, YAO Lin, SUN Zaozhan, MA Jingxian. Study on Acceptance Standards for Surface Flaw in Austenitic Steel Piping during in-Service Inspection[J]. Nuclear Power Engineering, 2012, 33(S2): 87-90.

Citation:

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Study on Acceptance Standards for Surface Flaw in Austenitic Steel Piping during in-Service Inspection

1. Nuclear and Radiation Safety Center, MEP, Beijing, 100082, China;
2. China Nuclear Power Engineering Co., Ltd, Beijing, 100840, China;
3. Nuclear Equipment Safety and Reliability Center, CAM, Beijing, 100044, China

Received Date: 2012-12-15
Rev Recd Date: 2012-12-25

Available Online: 2025-03-08

Abstract

Abstract

The paper gives a general introduction of formulation principles and main principal safety cri-teria of acceptance standards during in-service inspection of ASME XI.Model of circumferential and axial surface flaw in austenitic steel piping are explicated particularly.Allowable sizes of surface flaw with differ-ent aspect ratios of a/l in austenitic steel piping are deduced,and the calculation formula of allowable flaw sizes detected by nondestructive examinations during pre-service and in-service inspection considering UT inspection technical characteristics is presented.
- Austenitic steel piping,
- Surface flaw,
- In-service inspection,
- Allowable flaw size