ASME BPVC.VIII.3-2021 pdf download

ASME BPVC.VIII.3-2021 pdf download.Alternative Rules for Construction of High Pressure Vessels .
1 INTRODUCTION (a) The following information provides guidance to Code users for submitting technical inquiries to the applicable Boiler and Pressure Vessel (BPV) Standards Committee (hereinafter referred to as the Committee). See the guidelines on approval of new materials under the ASME Boiler and Pressure Vessel Code in Section II, Part D for requirements for requests that involve adding new materials to the Code. See the guidelines on approval of new welding and brazing ma- terials in Section II, Part C for requirements for requests that involve adding new welding and brazing materials (“con- sumables”) to the Code. Technical inquiries can include requests for revisions or additions to the Code requirements, requests for Code Cases, or requests for Code Interpretations, as described below: (1) Code Revisions. Code revisions are considered to accommodate technological developments, to address admin- istrative requirements, to incorporate Code Cases, or to clarify Code intent. (2) Code Cases. Code Cases represent alternatives or additions to existing Code requirements. Code Cases are writ- ten as a Question and Reply, and are usually intended to be incorporated into the Code at a later date. When used, Code Cases prescribe mandatory requirements in the same sense as the text of the Code. However, users are cautioned that not all regulators, jurisdictions, or Owners automatically accept Code Cases. The most common applications for Code Cases are as follows: (-a) to permit early implementation of an approved Code revision based on an urgent need (-b) to permit use of a new material for Code construction (-c) to gain experience with new materials or alternative requirements prior to incorporation directly into the Code (3) Code Interpretations (-a) Code Interpretations provide clarification of the meaning of existing requirements in the Code and are pre- sented in Inquiry and Reply format. Interpretations do not introduce new requirements. (-b) Interpretations will be issued only if existing Code text is ambiguous3 CODE REVISIONS OR ADDITIONS Requests for Code revisions or additions should include the following information: (a) Requested Revisions or Additions. For requested revisions, the Inquirer should identify those requirements of the Code that they believe should be revised, and should submit a copy of, or relevant extracts from, the appropriate require- ments as they appear in the Code, marked up with the requested revision. For requested additions to the Code, the In- quirer should provide the recommended wording and should clearly indicate where they believe the additions should be located in the Code requirements. (b) Statement of Need. The Inquirer should provide a brief explanation of the need for the revision or addition. ([c) Background Information. The Inquirer should provide background information to support the revision or addition, including any data or changes in technology that form the basis for the request, that will allow the Committee to ade- quately evaluate the requested revision or addition. Sketches, tables, figures, and graphs should be submitted, as appro- priate. The Inquirer should identify any pertinent portions of the Code that would be affected by the revision or addition and any portions of the Code that reference the requested revised or added paragraphs. 4 CODE CASES Requests for Code Cases should be accompanied by a statement of need and background information similar to that described in 3(b) and 3[c), respectively, for Code revisions or additions. The urgency of the Code Case (e.g.,, project un- derway or imminent, new procedure) should be described. In addition, it is important that the request is in connection with equipment that will bear the ASME Single Certification Mark, with the exception of Section XI applications. The pro- posed Code Case should identify the Code Section and Division, and should be written as a Question and a Reply, in the same format as existing Code Cases.