[Code of Federal Regulations]
[Title 49, Volume 3]
[Revised as of October 1, 2004]
From the U.S. Government Printing Office via GPO Access
[CITE: 49CFR192.151]

[Page 44-45]
 
                        TITLE 49--TRANSPORTATION
 
 CHAPTER I--RESEARCH AND SPECIAL PROGRAMS ADMINISTRATION, DEPARTMENT OF 
                       TRANSPORTATION (CONTINUED)
 
PART 192_TRANSPORTATION OF NATURAL AND OTHER GAS BY PIPELINE: MINIMUM 
FEDERAL SAFETY STANDARDS--Table of Contents
 
                 Subpart D_Design of Pipeline Components
 
Sec. 192.151  Tapping.

    (a) Each mechanical fitting used to make a hot tap must be designed 
for at least the operating pressure of the pipeline.
    (b) Where a ductile iron pipe is tapped, the extent of full-thread 
engagement and the need for the use of outside-sealing service 
connections, tapping saddles, or other fixtures must be determined by 
service conditions.
    (c) Where a threaded tap is made in cast iron or ductile iron pipe, 
the diameter of the tapped hole may not be more than 25 percent of the 
nominal diameter of the pipe unless the pipe is reinforced, except that

[[Page 45]]

    (1) Existing taps may be used for replacement service, if they are 
free of cracks and have good threads; and
    (2) A 1\1/4\-inch (32 millimeters) tap may be made in a 4-inch (102 
millimeters) cast iron or ductile iron pipe, without reinforcement.

However, in areas where climate, soil, and service conditions may create 
unusual external stresses on cast iron pipe, unreinforced taps may be 
used only on 6-inch (152 millimeters) or larger pipe.

[35 FR 13257, Aug. 19, 1970, as amended by Amdt. 192-85, 63 FR 37502, 
July 13, 1998]