ASME International

CRITERIA FOR RELIABILITY -BASED DESIGN AND ASSESSMENT FOR  B31.8 CODE
 N STP-PT-048

Annotation

The ASME B31.8R RBDA Appendix consists of two main sections:

Section Rl.O- Requirements: This section states all requirements associated with the application of the RBDA approach, including the reliability targets and the process that must be followed to demonstrate compliance with them. It also includes a set of requirements that specify the essential characteristics of a valid reliability estimation approach, but leaves it up to the user to select specific calculation models and procedures.

Section R2.0 - Commentary: This section provides supplementary technical information to assist the user in applying the Appendix. It contains background information on the approach that was used to develop the reliability targets and provides more detailed information on the reliability calculation models and input data.

While some overlap may exist between tlus document and the Commentary Section (Section R2.0) of the Appendix, the two documents have distinct purposes. The Commentary Section R2.0 provides additional technical information to assist users in carrying out the calculations and implementing the procedures required to apply the Appendix. This document provides additional information on the rationale behind the requirements and the implications of using them.

The outline of this Criteria Document is identical to the outline of the Requirements Section of the Appendix (Section Rl.O). For each section, the Criteria Document provides additional information in some or all of the following areas (as applicable).

I . Explanation of the intent and rationale behind the Requirements (e.g., why the Appendix includes separate reliability targets for location-specific threats such as known corrosion features).