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ASME B31.3-2016 <br /> Chapter VIII <br /> Piping for Category M Fluid Service <br /> M300 GENERAL STATEMENTS M302 DESIGN CRITERIA <br /> (a) Chapter VIII pertains to piping designated by the M302.1 General <br /> owner as being in Category M Fluid Service. See Paragraph M302 pertains to pressure—temperature rat- <br /> para. 300(b)(1) and Appendix M. ings, stress criteria, design allowances, and minimum <br /> (b) The organization, content, and paragraph desig- design values, together with permissible variations of <br /> nations of this Chapter correspond to those of the base these factors as applied to piping ing design.Paragraph 302 <br /> Code (Chapters I through VI) and Chapter VIL The pp <br /> applies in its entirety,with the exception of para.302.2.4. <br /> prefix M is used. <br /> See para. M302.2.4. <br /> (c) Provisions and requirements of the base Code and <br /> Chapter VII apply only as stated in this Chapter. M302.2.4 Allowance for Pressure and Temperature <br /> (d) Consideration shall be given to the possible need Variations, Metallic Piping. Use of allowances in <br /> for engineered safeguards as described in Appendix G, para. 302.2.4 is not permitted. <br /> para. G300.3, in addition to the inherent safeguards <br /> described in paras. G300.1 and G300.2. <br /> PART 2 <br /> (e) This Chapter makes no provision for piping to be <br /> PRESSURE DESIGN OF METALLIC PIPING <br /> used under severe cyclic conditions. If it is not feasible <br /> to eliminate the severe cyclic conditions,the engineering COMPONENTS <br /> design shall specify any necessary provisions in accor- M303 GENERAL <br /> dance with para. 300(c)(5). <br /> (f) Chapter I applies in its entirety. Paragraph 303 applies in its entirety. <br /> PART 1 M304 PRESSURE DESIGN OF METALLIC <br /> CONDITIONS AND CRITERIA COMPONENTS <br /> M301 DESIGN CONDITIONS Paragraph 304 applies in its entirety. <br /> Paragraph 301 applies in its entirety,with the excep- <br /> tions of paras. 301.3 and 301.5. See paras. M301.3 and PART 3 <br /> M301.5. FLUID SERVICE REQUIREMENTS FOR METALLIC <br /> M301.3 Design Temperature, Metallic Piping PIPING COMPONENTS <br /> Use of any temperature other than the fluid tempera- M305 PIPE <br /> ture as the design temperature shall be substantiated <br /> by heat transfer calculations confirmed by tests or by M305.1 General <br /> experimental measurements. Listed pipe may be used in accordance with <br /> M301.5 Dynamic Effects para. M305.2. Unlisted pipe may be used only as pro- <br /> Paragraph 301.5 applies with the exception of vided in para. 302.2.3. <br /> paras. 301.5.1 and 301.5.4. See paras. M301.5.1 and M305.2 Specific Requirements for Metallic Pipe <br /> M301.5.4. <br /> Pipe listed in para.305.2.2 shall not be used.The provi- <br /> M301.5.1 Impact. Design,layout,and operation of sion for severe cyclic conditions in para. 305.2.3 does <br /> piping shall be conducted so as to minimize impact not apply [see para. M300(e)]. <br /> and shock loads. In the event that such loadings are <br /> unavoidable,para. 301.5.1 applies. <br /> M306 METALLIC FITTINGS, BENDS, MITERS, <br /> M301.5.4 Vibration. Suitable dynamic analysis, LAPS, AND BRANCH CONNECTIONS <br /> such as computer simulation,shall be made where nec- <br /> essary to avoid or minimize conditions that lead to detri- General. Fittings,bends,miters,laps,and branch con- <br /> mental vibration,pulsation, or resonance effects in the nections may be used in accordance with paras.M306.1 <br /> piping. through M306.6. Pipe and other materials used in such <br />