[Code of Federal Regulations]

[Title 46, Volume 4]

[Revised as of October 1, 2006]

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

[CITE: 46CFR108.449]



[Page 137]

 

                            TITLE 46_SHIPPING



                  (This book contains parts 90 to 139)

 

   CHAPTER I--COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED)

 

PART 108_DESIGN AND EQUIPMENT--Table of Contents

 

                  Subpart D_Fire Extinguishing Systems

 

Sec.  108.449  Piping tests.



    (a) Each test prescribed in (b), (c), and (d) of this section must 

be performed upon completion of the piping installation.

    (b) When tested with CO2 or other inert gas under a 

pressure of 70 kilograms per square centimeter (1000 pounds per square 

inch), with no additional gas introduced into the system, the leakage in 

the piping from the cylinders to the stop valves in the manifold must 

not allow a pressure drop of more than 10.5 kilograms per square 

centimeter (150 pounds per square inch) per minute for a 2 minute 

period.

    (c) When tested with CO2 or other inert gas under a 

pressure of 42 kilograms per square centimeter (600 pounds per square 

inch), with no additional gas introduced into the system, the leakage in 

each branch line must not allow a pressure drop of more than 10.5 

kilograms per square centimeter (150 pounds per square inch) per minute 

for a 2-minute period. The distribution piping must be capped within the 

protected space.

    (d) Small independent systems protecting emergency generator rooms, 

lamp lockers and similar small spaces need not meet the tests prescribed 

in paragraphs (a) and (b) of this section if they are tested by blowing 

out the piping with air at a pressure of at least 7 kilograms per square 

centimeter (100 pounds per square inch).