With certain exceptions, part 195 does not require liquid pipelines constructed before January 8, 1971, to be qualified for use by hydrostatic testing. Liquid pipelines have experienced accidents caused by latent material and construction defects which could have been prevented had such defects been discovered and re- 'moved through hydrostatic testing. This notice proposes to reduce the potential for severe liquid pipeline accidents by requiring a hydrostatic test in accordance with Subpart E on all onshore pipelines carrying highly volatile liquids (HVL) which have not been previously tested to at least 1.25 times their maximum operating pressure for at least 24 hours.