[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: 46CFR56.15-5]

[Page 181-182]
 
                           TITLE 46--SHIPPING
 
   CHAPTER I--COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED)
 
PART 56_PIPING SYSTEMS AND APPURTENANCES--Table of Contents
 
                         Subpart 56.15_Fittings
 
Sec. 56.15-5  Fluid-conditioner fittings.

    (a) Fluid conditioner fittings certified in accordance with subpart 
50.25 of this subchapter are acceptable for use in piping systems.
    (b) Fluid conditioner fittings, not containing hazardous materials 
as defined in Sec. 150.115 of this chapter, which are made in 
accordance with the applicable standards listed in Table 56.60-1(b) of 
this part and of materials complying with subpart 56.60 of this part, 
may be used within the material, size, pressure, and temperature 
limitations of those standards and within any further limitations 
specified in this subchapter.
    (c) The following requirements apply to nonstandard fluid 
conditioner fittings which do not contain hazardous

[[Page 182]]

materials as defined in Sec. 150.115 of this chapter:
    (1) The following nonstandard fluid conditioner fittings must meet 
the applicable requirements in Sec. 54.01-5 (c)(3), (c)(4), and (d) of 
this chapter or the remaining provisions in part 54 of this chapter, 
except that Coast Guard shop inspection is not required:
    (i) Nonstandard fluid conditioner fittings that have a net internal 
volume greater than 0.04 cubic meters (1.5 cubic feet) and that are 
rated for temperatures and pressures exceeding those specified as 
minimums for Class I piping systems.
    (ii) Nonstandard fluid-conditioner fittings that have an internal 
diameter exceeding 15 centimeters (6 inches) and that are rated for 
temperatures and pressures exceeding those specified as minimums for 
Class I piping systems.
    (2) All other nonstandard fluid conditioner fittings must meet the 
following:
    (i) All pressure-containing materials must be accepted in accordance 
with Sec. 56.60-1 of this part.
    (ii) Nonstandard fluid conditioner fittings must be designed so that 
the maximum allowable working pressure does not exceed one-fourth of the 
burst pressure or produce a primary stress greater than one-fourth of 
the ultimate tensile strength of the material for Class II systems and 
for all Class I, I-L, and II-L systems receiving ship motion dynamic 
analysis and nondestructive examination. For Class I, I-L, or II-L 
systems not receiving ship motion dynamic analysis and nondestructive 
examination under Sec. 56.07-10(c) of this part, the maximum allowable 
working pressure must not exceed one-fifth of the burst pressure or 
produce a primary stress greater than one-fifth of the ultimate tensile 
strength of the material. The maximum allowable working pressure may be 
determined by--
    (A) Calculations comparable to those of ANSI B31.1 or Section VIII 
of the ASME Code;
    (B) Subjecting a representative model to a proof test or 
experimental stress analysis described in paragraph A-22 of Section I of 
the ASME Code; or
    (C) Other means specifically accepted by the Marine Safety Center.
    (iii) Nonstandard fluid conditioner fittings must be tested in 
accordance with Sec. 56.97-5 of this part.
    (iv) If welded, nonstandard fluid conditioner fittings must be 
welded in accordance with subpart 56.70 of this part and part 57 of this 
chapter or by other processes specifically approved by the Marine Safety 
Center.
    (d) All fluid conditioner fittings that contain hazardous materials 
as defined in Sec. 150.115 of this chapter must meet the applicable 
requirements of part 54 of this chapter, except subpart 54.10.
    (e) Heat exchangers having headers and tubes and brazed boiler steam 
air heaters are not considered fluid conditioner fittings and must meet 
the requirements in part 54 of this chapter regardless of size. For 
brazed boiler steam air heaters, see also Sec. 56.30-30(b)(1) of this 
part.

[CGD 77-140, 54 FR 40602, Oct. 2, 1989, as amended by CGD 83-043, 60 FR 
24772, May 10, 1995]