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ASME B31.3-2016 <br /> Table 326.1 Component Standards (Cont`d) <br /> NOTES (Cont`d): <br /> (5) MSS SP-119 includes three classes of fittings: MP, MARINE, and CR. Only the MP class fittings are considered a "Listed Component" <br /> for the purpose of this Code. Cautionary Note: See MSS SP-119 (Section 6) for special provisions concerning ratings. (In accordance <br /> with MSS SP-119, the pressure ratings for MP class fittings are 87.5%of those calculated for straight seamless pipe of minimum <br /> wall thickness.) <br /> (6) See also Appendix A. <br /> (7) ASME PTC 19.3 TW allows mechanical design of thermowells to be in accordance with various design codes. Only PTC 19.3 TW <br /> thermowells with design and calculations for pressure-containing elements in accordance with ASME B31.3 are considered a "listed <br /> component"for the purpose of this Code. <br /> (8) For use with this Code, the rated pressure of components covered by this standard shall be based on no greater than one-third the <br /> hydrostatic test failure pressure (the pressure at fracture or leakage), rather than one-half the hydrostatic test failure pressure <br /> specified in AWWA C606. <br /> (9) Welding and brazing to be in accordance with paras. 328 and 333, respectively in lieu of the referenced specifications in this <br /> standard. <br /> (10) This standard contains recommended materials of construction for certain chemical services;the responsibility for the ultimate <br /> selection of material is the responsibility of the Owner and is,therefore, not within the scope of this Code. <br />