[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: 46CFR56.30-25]

[Page 190-191]
 
                           TITLE 46--SHIPPING
 
   CHAPTER I--COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED)
 
PART 56_PIPING SYSTEMS AND APPURTENANCES--Table of Contents
 
        Subpart 56.30_Selection and Limitations of Piping Joints
 
Sec. 56.30-25  Flared, flareless, and compression fittings.

    (a) This section applies to pipe fittings that are mechanically 
connected to pipe by such means as ferrules, flared ends, swaging, 
elastic strain preload, crimping, bite-type devices, and shape memory 
alloys. Fittings to which this section applies must be designed, 
constructed, tested, and marked in accordance with ASTM F 1387 
(incorporated by reference, see Sec. 56.01-2). Previously approved 
fittings may be retained as long as they are maintained in good 
condition to the satisfaction of the Officer in Charge, Marine 
Inspection.
    (b) Flared, flareless and compression fittings may be used within 
the service limitations of size, pressure, temperature, and vibration 
recommended by the manufacturer and as specified in this section.
    (c) Flared, flareless, and compression type tubing fittings may be 
used for

[[Page 191]]

tube sizes not exceeding 50 millimeters (2 inches) outside diameter 
within the limitations of applicable standards and specifications listed 
in this section and Sec. 56.60-1 of this part.
    (d) Flareless fittings must be of a design in which the gripping 
member or sleeve must grip or bite into the outer surface of the tube 
with sufficient strength to hold the tube against pressure, but without 
appreciably distorting the inside tube diameter or reducing the wall 
thickness. The gripping member must also form a pressure seal against 
the fitting body.
    (e) For fluid services, other than hydraulic systems, using a 
combustible fluid as defined in Sec. 30.10-15 of this chapter and for 
fluid services using a flammable fluid as defined in Sec. 30.10-22 of 
this chapter, flared fittings must be used; except that flareless 
fittings of the nonbite type may be used when the tubing system is of 
steel, nickel copper or copper nickel alloy. When using copper or copper 
zinc alloy, flared fittings are required. (See also Sec. 56.50-70 for 
gasoline fuel systems, Sec. 56.50-75 for diesel fuel systems, and Sec. 
58.25-20 for hydraulic systems for steering gear.)

[CGD 95-027, 61 FR 26000, May 23, 1996; 61 FR 35138, July 5, 1996, as 
amended by USCG-1999-5151, 64 FR 67180, Dec. 1, 1999; USCG-2000-7790, 65 
FR 58460, Sept. 29, 2000]