49 C.F.R. § 192.277 Ductile iron pipe.
Title 49 - Transportation
(a) Ductile iron pipe may not be joined by threaded joints. (b) Ductile iron pipe may not be joined by brazing. [35 FR 13257, Aug. 19, 1970, as amended by Amdt. 192–62, 54 FR 5628, Feb. 6, 1989]
Title 49: Transportation
PART 192—TRANSPORTATION OF NATURAL AND OTHER GAS BY PIPELINE: MINIMUM FEDERAL SAFETY STANDARDS
Subpart F—Joining of Materials Other Than by Welding
§ 192.277 Ductile iron pipe.