Ideas for this Code part were constructed contemplating the wishes for functions that come with piping generally present in electrical strength producing stations, in commercial and institutional vegetation, geothermal heating structures, and valuable and district heating and cooling systems.
Key alterations to this revision contain the relocation of the principles for nonmetallic piping and piping covered with nonmetals from a nonmandatory appendix to a compulsory appendix, chosen language from Nonmandatory Appendix V has been moved into the physique of the code in bankruptcy VII, the preheat and submit weld warmth remedy ideas were reformatted into tabular shape for readability, and chilly forming ideas for creep power more suitable ferritic steels were integrated into bankruptcy V.
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Extra resources for ASME B31.1-2014
Root penetration: the depth a groove weld extends into the root opening of a joint measured on the centerline of the root cross section. seal weld: a weld used on a pipe joint primarily to obtain fluid tightness as opposed to mechanical strength. semiautomatic arc welding: arc welding with equipment that controls only the filler metal feed. The advance of the welding is manually controlled. shall: “shall” or “shall not” is used to indicate that a provision or prohibition is mandatory. shielded metal arc welding: an arc welding process wherein coalescence is produced by heating with an electric arc between a covered metal electrode and the work.
Reinforcement of weld: weld metal on the face of a groove weld in excess of the metal necessary for the specified weld size. restraint: any device that prevents, resists, or limits movement of a piping system. root opening: the separation between the members to be joined, at the root of the joint. root penetration: the depth a groove weld extends into the root opening of a joint measured on the centerline of the root cross section. seal weld: a weld used on a pipe joint primarily to obtain fluid tightness as opposed to mechanical strength.
00 ... 95 ... 91 ... 77 CSEF (Sub Crit) [Notes (8), (13)] Austenitic stainless (incl. 800H & 800HT) [Notes (14), (15)] Autogenously welded austenitic stainless [Note (16)] ... ... ... ... 00 ... 77 ... ... ... 00 NOTES: (1) NP p not permitted. (2) Longitudinal welds in pipe for materials not covered in this Table operating in the creep regime are not permitted. For the purposes of this Table, the start of the creep range is the highest temperature where the nonitalicized stress values end in Mandatory Appendix A for the base material involved.