[Code of Federal Regulations]
[Title 46, Volume 2]
[Revised as of October 1, 2004]
From the U.S. Government Printing Office via GPO Access
[CITE: 46CFR56.07-5]

[Page 178-179]
 
                           TITLE 46--SHIPPING
 
   CHAPTER I--COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED)
 
PART 56_PIPING SYSTEMS AND APPURTENANCES--Table of Contents
 
                          Subpart 56.07_Design
 
Sec. 56.07-5  Definitions (modifies 100.2).


    (a) Piping. The definitions contained in 100.2 of ANSI-B31.1 apply, 
as well as the following:
    (1) The word piping within the meaning of the regulations in this 
subchapter refers to fabricated pipes or tubes with flanges and fittings 
attached, for use in the conveyance of vapors, gases or liquids, 
regardless of whether the diameter is measured on the inside or the 
outside.
    (b) Nominal diameter. The term nominal diameter or diameter as used 
in this part, means the commercial diameter of the piping, i.e., pipe 
size.
    (c) Schedule. The word Schedule when used in this part refers to 
specific values as given in American National Standards B36.10 and 
B36.19.
    (d) Fittings and appurtenances. The word fitting and the phrase 
fittings and appurtenances within the meaning of the regulations in this 
subchapter refer to pressure containing piping system components other 
than valves and pipe. This includes piping system components whose 
function is to join branches of the system (such as tees, wyes, elbows, 
unions, bushings, etc.) which are referred to as pipe joining fittings, 
as well as components which operate on the fluid contained in the system 
(such as traps, drains, strainers, separators, filters, meters, etc.), 
which are referred to as ``fluid conditioner'' fittings. Thermometer 
wells and other similar fittings which form part of the pressure barrier 
of any system are included under this heading. Expansion joints, slip 
joints, rotary joints, quick disconnect couplings, etc., are referred to 
as special purpose fittings, and may be subject to such special design 
and testing requirements as prescribed by the Commandant. Refer to 
subpart 56.15 for design requirements for fittings.
    (e) Nonstandard fittings. ``Nonstandard fitting'' means a component 
of a piping system which is not fabricated under an adopted industry 
standard.

[[Page 179]]

    (f) Vital system. A vital system is one which is essential to the 
safety of the vessel, its passengers and crew.
    (g) Plate flange. The term plate flange, as used in this subchapter, 
means a flange made from plate material, and may have a raised face and/
or a raised hub.

[CGFR 68-82, 33 FR 18843, Dec. 18, 1968, as amended by CGFR 69-127, 35 
FR 9978, June 17, 1970; CGD 77-140, 54 FR 40602, Oct. 2, 1989]