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ASME B31.3-2016 <br /> Chapter VII <br /> Nonmetallic Piping and Piping Lined With Nonmetals <br /> A300 GENERAL STATEMENTS A302.1 General <br /> (a) Chapter VII pertains to nonmetallic piping and to The designer shall be satisfied as to the adequacy <br /> piping lined with nonmetals. nonmetallic material and its manufacture, considering <br /> (b) The organization, content, and paragraph desig- at least the following: <br /> nations of this Chapter correspond to those of the first (a) tensile,compressive,flexural,and shear strength, <br /> six Chapters (the base Code). The prefix A is used. and modulus of elasticity, at design temperature (long <br /> (c) Provisions and requirements of the base Code term and short term) <br /> apply only as stated in this Chapter. (b) creep rate at design conditions <br /> (d) Metallic piping that provides the pressure contain- (c) design stress and its basis <br /> ment for a nonmetallic lining shall conform to the (d) ductility and plasticity <br /> requirements of Chapters I through VI,and to those in (e) impact and thermal shock properties <br /> Chapter VII not limited to nonmetals. (f) temperature limits <br /> (e) This Chapter makes no provision for piping to be (g) transition temperature — melting and <br /> used under severe cyclic conditions. vaporization <br /> (f) With the exceptions stated above, Chapter I (h) porosity and permeability <br /> applies in its entirety. (i) testing methods <br /> (j) methods of making joints and their efficiency <br /> PART 1 W possibility of deterioration in service <br /> CONDITIONS AND CRITERIA A302.2 Pressure—Temperature Design Criteria <br /> A301 DESIGN CONDITIONS A302.2.1 Listed Components Having Established <br /> Paragraph 301 applies in its entirety, with the <br /> Ratings. Paragraph 302.2.1 applies, except that refer- <br /> exception of paras. 301.2 and 301.3. See below. ence to Table A326.1 replaces reference to Table 326.1. <br /> A302.2.2 Listed Components Not Having Specific <br /> A301.2 Design Pressure Ratings. Nonmetallic piping components for which <br /> Paragraph 301.2 applies in its entirety,except that ref- design stresses have been developed in accordance with <br /> erences to paras. A302.2.4 and A304 replace references para. A302.3,but which do not have specific pressure— <br /> to paras. 302.2.4 and 304,respectively. temperature ratings,shall be rated by rules for pressure <br /> design in para. A304,within the range of temperatures <br /> A301.3 Design Temperature for which stresses are shown in Appendix B, modified <br /> as applicable by other rules of this Code. <br /> Paragraph 301.3 applies with the following exceptions. Piping components that do not have allowable stresses <br /> A301.3.1 Design Minimum Temperature. or pressure—temperature ratings shall be qualified for <br /> Paragraph 301.3.1 applies;but see para.A323.2.2,rather pressure design as required by para. A304.7.2. <br /> than para. 323.2.2. A302.2.3 Unlisted Components. Paragraph 302.2.3 <br /> A301.3.2 Uninsulated Components. Thecomponent applies, except that references to Table A326.1 and <br /> design temperature shall be the fluid temperature, paras. A304 and A304.7.2 replace references to <br /> unless a higher temperature will result from solar radia- Table 326.1 and paras. 304 and 304.7.2,respectively. <br /> tion or other external heat sources. A302.2.4 Allowances for Pressure and Temperature <br /> Variations <br /> A302 DESIGN CRITERIA (a) Nonmetallic Piping. Allowances for variations of <br /> pressure or temperature, or both, above design condi- <br /> Paragraph A302 states pressure—temperature ratings, tions are not permitted. The most severe conditions of <br /> stress criteria,design allowances,and minimum design coincident pressure and temperature shall be used to <br /> values,together with permissible variations of these fac- determine the design conditions for a piping system. <br /> tors as applied to the design of piping. See paras. 301.2 and 301.3. <br />