scope:

(a) These requirements apply to the ASME Section III, ANSI B31.1, and ANSI B31.7 piping, classified by the Owner as Class 2 or 3. The provisions of this Case do not apply to the following:

(1) pumps, valves, expansion joints and heat exchangers;

(2) weld metal of socket welded joints;

(3) leakage through a flange joint;

(4) threaded connections employing nonstructural seal welds for leakage protection.

(b) The provisions of this Case apply to Class 2 or 3 piping whose maximum operating temperature does not exceed 200°F (93°C) and whose maximum operating pressure does not exceed 275 psig (1.9 MPa).

(c) The following flaw evaluation criteria are permitted for pipe and tube. The flaw evaluation criteria are permitted for adjoining fittings and flanges to a distance of (Ro t )1⁄2 from the weld centerline.

(d) The provisions of this Case demonstrate the integrity of the item and not the consequences of leakage. It is the responsibility of the Owner to demonstrate system operability considering effects of leakage.

(e) The evaluation period, _Tallow, is the operational time for which the temporary acceptance criteria are satisfied but not exceeding 26 months from the initial discovery of the condition.