[Code of Federal Regulations]

[Title 49, Volume 2]

[Revised as of October 1, 2005]

From the U.S. Government Printing Office via GPO Access

[CITE: 49CFR179.100-10]



[Page 1038-1039]

 

                        TITLE 49--TRANSPORTATION

 

   CHAPTER I--PIPELINE AND HAZARDOUS MATERIALS SAFETY ADMINISTRATION, 

                      DEPARTMENT OF TRANSPORTATION

 

PART 179_SPECIFICATIONS FOR TANK CARS--Table of Contents

 

 Subpart C_Specifications for Pressure Tank Car Tanks (Classes DOT-105, 

                         109, 112, 114 and 120)

 

Sec. 179.100-10  Postweld heat treatment.



    (a) After welding is complete, steel tanks and all attachments 

welded thereto must be postweld heat treated as a unit in compliance 

with the requirements of AAR Specifications for Tank Cars, appendix W 

(IBR, see Sec. 171.7 of this subchapter).

    (b) For aluminum tanks, postweld heat treatment is prohibited.



[[Page 1039]]



    (c) Tank and welded attachments, fabricated from ASTM A 240/A 240M 

(IBR, see Sec. 171.7 of this subchapter), Type 304L or Type 316L 

materials do not require postweld heat treatment, but these materials do 

require a corrosion resistance test as specified in Sec. 179.100-

7(c)(2).



[Amdt. 179-10, 36 FR 21345, Nov. 6, 1971, as amended by Amdt. 179-47, 58 

FR 50238, Sept. 24, 1993; Amdt. 179-52, 61 FR 28679, June 5, 1996; 67 FR 

51660, Aug. 8, 2002; 68 FR 75758 and 75759, Dec. 31, 2003]