ASME/BPVC SEC XII

Abstract

<strong>Geometric Scope of the Pressure Vessel</strong> <br><em>(a)</em> The geometric scope of this Section shall, as a minimum, include the pressure-containing parts of pressure vessels up to and including the following: <br><em>(1)</em> the first threaded joint for threaded connections. <br><em>(2)</em> the face of the first flange for flanged connections. <br><em>(3)</em> the first sealing surface for proprietary connections or fittings for which rules are not provided for in this Section. <br><em>(4)</em> the welding end connection for the first circumferential joint forwelded connections to attached piping, valves, and instruments, etc. <br><em>(5)</em> the welding pad for attachment of any external nonpressure attachments such as shipping frames, and handling points, etc. Parts welded to these pads need not comply with TG-110.1(b). <br><em>(6)</em> pressure-retaining permanent covers and closures, including seals, bolting, and other mechanical retainers at openings. <br><em>(b)</em> Where nonpressure parts are directly welded to the pressure-retaining surface of a pressure vessel, this scope shall include the material, design, fabrication, and testing requirements established for nonpressure attachments by the applicable paragraphs of this Section. <br><em>(c)</em> Items in addition to the <em>pressure vessel</em> transform the vessel into a <em>tank</em>. These items are addressed in the applicable Modal Appendix. <br><strong>Physical Scope of the Pressure Vessel</strong> <br><em>(a)</em> Internal pressure shall be in the range from 0 to 207 bar (full vacuum to 3,000 psig). <br><em>(b)</em> The temperature range shall be from &#226;&#710;&#8217;269&#194;&#176;C to 343&#194;&#176;C (&#226;&#710;&#8217;452&#194;&#176;F to 650&#194;&#176;F). <br><em>(c)</em> Thickness of shells and heads shall not exceed 38 mm (1&#194;&#189; in.).