(a) A nonstandard boiler construction, installed prior to 1937, shall have a maximum in-service time of thirty (30) years, unless the following are accepted:
  (1) an internal and external annual inspection; and
  (2) an annual liquid pressure test of one and one-quarter times the MAWP held for a period of at least thirty (30) minutes, during which no distress or leakage develops. At no time, while applying the liquid pressure test, shall the pressure exceed one and one-quarter times the MAWP by more than 6%.
(b) Any nonstandard boiler having lap-riveted longitudinal joints and operating at a pressure in excess of 50 psig (345 kilopascals) shall have a maximum in service of twenty (20) years; this type of boiler, when removed from the existing setting, shall not be reinstalled for a pressure in excess of 15 psig (103 kilopascals).
(c) Any boiler having other than a lap-riveted longitudinal joint may be continued in operation without reduction in the MAWP.

Source Note: The provisions of this §65.203 adopted to be effective June 15, 2015, 40 TexReg 3121; amended to be effective February 15, 2016, 41 TexReg 795