(a) If a segment of transmission line, or distribution main operating at 125 psig (862 kPa) or more in a Class 3 or 4 location, is repaired by cutting out the damaged portion of the pipe as a cylinder, the replacement pipe must be tested to the pressure required for a new line installed in the same location. This test may be made on the pipe before it is installed provided nondestructive tests meeting the requirements of section 255.243 of this Part are made on all field girth butt welds after installation.

(b) Emergency pipe when retained in stock shall be tested before storage at 90 percent of SMYS or one and one-half times the certified operating pressure, whichever is less. Such pipe shall be appropriately marked and test records retained.

(c) Each repair made by welding in accordance with sections 255.713, 255.715 and 255.717 of this Part must be examined in accordance with section 255.241 of this Part.