Section 193.2321 - Nondestructive tests(a) The following percentages of each day's circumferentially welded pipe joints for hazardous fluid piping, selected at random, must be nondestructively tested over the entire circumference to indicate any defects which could adversely affect the integrity of the weld or pipe: | Weld type | Cryogenic piping | Other | Test method |
| Butt welds more than 2 inches in nominal size | 100 | 30 | Radiographic or ultrasonic. |
| Butt welds 2 inches or less in nominal size | 100 | 30 | Radiographic, ultrasonic, liquid penetrant or magnetic particle. |
| Fillet and socket welds | 100 | 30 | Liquid penetrant or magnetic particle. |
(b) Evaluation of weld tests and repair of defects must be in accordance with the requirements of ASME/ANSI B31.3 or API 1104, as applicable.(c) Where longitudinally or spiral welded pipe is used in transfer systems, 100 percent of the seam weld must be examined by radiographic or ultrasonic inspection.(d) The butt welds in metal shells of storage tanks with internal design pressure of not more than 15 psig must be radiographically tested in accordance with section Q.7.6, API 620, Appendix Q, except that for hydraulic load bearing shells with curved surfaces that are subject to cryogenic temperatures, 100 percent of both longitudinal (or meridional) and circumferential or (or latitudinal) welds must be radiographically tested.(e) The butt welds in metal shells of storage tanks with internal design pressure above 15 psig must be radiographically tested in accordance with section IX of the ASME Boiler and Pressure Vessel Code, except that for hydraulic load bearing shells with curved surfaces that are subject to cryogenic temperatures, 100 percent of both longitudinal (or meridional) and circumferential (or latitudinal) welds must be radiographically tested.Wis. Admin. Code Department of Transportation § app 1 § 193.2321
58 FR 14522, March 18, 1993; Amdt. 193-10, 61 FR 18517, April 26, 1996