Section PSC 135.309 - Repair of steel pipe addition [49 CFR 192.309]After 49 CFR 192.309(e), insert:
(fw) Due primarily to climate conditions, gouges, grooves, notches, and dents have been found to be an important cause of steel pipe failures and an attempt shall be made to prevent or eliminate harmful defects of this nature. Section 192.309(b) pertains to transmission lines and mains intended to operate at hoop stresses of 20% or 40% or more of the specified minimum yield strength. However, applicable portions of these paragraphs shall apply to facilities intended to operate below this hoop stress level.Wis. Admin. Code Public Service Commission PSC 135.309
CR Register, October, 1999, No. 526, eff. 11-1-99.