[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).