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ASME Ⅲ-3-2006 pdf download

(a) The term material as used in this Subsection is defined in WA-1220. The term Material Organization is defined in WA-3800. (b) The term containment system material as used in this Subsection applies to items such as vessel shells and heads; reinforcement around openings and penetrations and appurtenances such as leak testing and drainage ports, and structural reinforcements required by design to main- tain structural integrity. (c) The requirements of this Article make reference to the term thickness. For the purpose intended, the fol- lowing definitions of nominal thickness apply. (1) plate一the thickness is the dimension of the short transverse direction (2) forgings – the thickness is the dimension defined as follows: (a) hollow forgings一the nominal thickness is measured between the inside and outside surfaces (radial thickness) (b) disk forgings (axial length less than the out- side diameter)- the nominal thickness is the axial length (C) flat ring forgings (axial length less than the radial thickness)一for axial length S 2 in. (50 mm), the axial length is the nominal thickness. For axial length > 2 in. (50 mm), the radial thickness is the nominal thickness. (d) rectangular solid forgings一the least rectan- gular dimension is the nominal thickness (3) castings (a) Thickness t for fracture toughness testing is defined as the nominal pipe wall thickness of the connect- ing piping. (b) Thickness t for heat treatment purposes is defined as the thickness of the pressure retaining wall of the casting, excluding flanges and sections designated by the designer as nonpressure retaining.
WB-2120 CONTAINMENT SYSTEM MATERIAL WB-2121 Permitted Material Specifcations (a) Containment system material and material welded thereto, except as permitted in WB 4435, and except for welding, brazing, and hard surfacing metals and cladding which is 10% or less of the thickness of the base material (WB-3122), shall conform to the requirements of one of the specifcations for material given in Section II, Part D for Division 1, Class 1 or Division 3 Class TP construc- tion, including all applicable footnotes in the table, and to all of the special requirements of this Article which apply to the product form in which the material is used. (b) The requirements of this Article do not apply to seals, packaging, gaskets, and valve seats. (c) Material made to specifications other than those specifed in Section II, Part D, for Division 1, Class 1 or Division 3, Class TP may be used for pressure relief disks. (d) Material for instrument line fttings, NPS 1 (DN 25) and less, may be of material made to specifications other than those listed in Appendix 1 provided that the material is determined to be adequate for the service conditions by the containment system designer. (e) Welding and brazing material used in the manufac- ture of items shall comply with an SFA specification in Section II, Part C, except as otherwise permitted in Sec- tion IX, and shall also comply with the applicable require- ments of this Article. The requirements of this Article do not apply to material used as backing rings or backing strips in welded joints. WB-2122 Special Requirements Conficting With Permitted Material Specifications Special requirements stipulated in this Article shall apply in lieu of the requirements of the material specifca- tion wherever the special requirements conflict with the material specification requirements (WA-3856). Where. the special requirements include an examination, test, or treatment which is also required by the material specifica- tion, the examination, test, or treatment need be per- formed only once.

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