scope:

(a) The provisions of this Case apply to piping and tubing, and their associated fittings and flanges, and the welding ends of pumps, valves, and pressure vessels, except for those that form the containment boundary. The provisions of this Case do not apply to other locations in pumps, valves, and pressure vessels.

(b) This Case shall not be used for piping larger than NPS 2 when the nominal operating temperature or pressure exceeds 200°F or 275 psig.

(c) Mechanical clamping devices constructed in accordance with this Case may remain in service only until the next refueling outage, at which time the defect shall be repaired or replaced in accordance with IWA-4000.

(d) References to Section XI within the text of this Case are to the 1995 Edition with the 1996 Addenda. For use with other Editions and Addenda of Section XI, refer to Table 1 for applicable Section XI references.