
[Federal Register: December 16, 2008 (Volume 73, Number 242)]
[Rules and Regulations]               
[Page 76247-76249]
From the Federal Register Online via GPO Access [wais.access.gpo.gov]
[DOCID:fr16de08-13]                         

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DEPARTMENT OF HOMELAND SECURITY

Coast Guard

46 CFR Part 56

[Docket No. USCG-2003-16630]
RIN 1625-AA83

 
Review and Update of Standards for Marine Equipment; Correction

AGENCY: Coast Guard, DHS.

ACTION: Correcting amendment.

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SUMMARY: The Coast Guard published a document in the Federal Register 
on October 31, 2008 (73 FR 65156), revising rules relating to standards 
for marine equipment. That document provided incorrect amendatory 
instruction for 46 CFR 56.30-10. This document corrects the final 
regulation by revising the amendatory instruction.

DATES: Effective December 16, 2008. The incorporation by reference of 
certain publications listed in the rule is approved by the Director of 
the Federal Register on January 15, 2009.

FOR FURTHER INFORMATION CONTACT: If you have questions on this rule, 
call Thane Gilman, Project Manager, Office of Design and Engineering 
Standards (CG-521), U.S. Coast Guard, 2100 Second Street, SW., 
Washington, DC 20593-0001, telephone 202-372-1383. If you have 
questions on viewing the docket, call Renee V. Wright, Program Manager, 
Docket Operations, telephone 202-366-9826.

SUPPLEMENTARY INFORMATION:

Need for Correction

    As published, the amendatory instruction for 46 CFR 56.30-10 was 
incorrect and could not be given effect in the Code of Federal 
Regulations.

List of Subjects in 46 CFR Part 56

    Incorporation by reference, Reporting and recordkeeping 
requirements, Vessels.

0
Accordingly, 46 CFR part 56 is corrected by making the following 
correcting amendment:

PART 56--PIPING SYSTEMS AND APPURTENANCES

0
1. The authority citation for part 56 continues to read as follows:

    Authority: 33 U.S.C. 1321(j), 1509; 43 U.S.C. 1333; 46 U.S.C. 
3306, 3703; E.O. 12234, 45 FR 58801, 3 CFR, 1980 Comp., p. 277; E.O. 
12777, 56 FR 54757, 3 CFR, 1991 Comp., p. 351; Department of 
Homeland Security Delegation No. 0170.1.


0
2. Amend Sec.  56.30-10 by revising paragraph (b) to read as follows:


Sec.  56.30-10  Flanged joints (modifies 104.5.1(a)).

* * * * *
    (b) Flanges may be attached by any method shown in Figure 56.30-
10(b) or by any additional means that may be approved by the Marine 
Safety Center. Pressure temperature ratings of the appropriate ANSI/
ASME standard must not be exceeded.
    (1) Figure 56.30-10(b), Method 1. Flanges with screw threads may be 
used in accordance with 46 CFR 56.30-20, Table 56.30-20(c).
    (2) Figure 56.30-10(b), Method 2. ASME B16.5 (incorporated by 
reference; see 46 CFR 56.01-2) Class 150 and Class 300 low-hubbed 
flanges with screw threads, plus the addition of a strength fillet weld 
of the size as shown, may be used in Class I systems not exceeding 750 
[deg]F or 4 NPS, in Class II systems without diameter limitations, and 
in Class II-L systems not exceeding 1 NPS. If 100 percent radiography 
is required by 46 CFR 56.95-10 for the class, diameter, wall thickness, 
and material of pipe being joined, the use of the threaded flanges is 
not permitted and buttwelding flanges must be provided. For Class II 
piping systems, the size of the strength fillet may be limited to a 
maximum of 0.525 inch instead of 1.4T.
    (3) Figure 56.30-10(b), Method 3. Slip-on flanges meeting ASME 
B16.5 may be used in piping systems of Class I, Class II, or Class II-L 
not to exceed the service pressure-temperature ratings for flanges of 
class 300 and lower, within the temperature limitations of the material 
selected for use, and not to exceed 4-inch Nominal Pipe Size (NPS) in 
systems of Class I and Class II-L. If 100 percent radiography is 
required by 46 CFR 56.95-10 for the class, diameter, wall thickness, 
and material of the pipe being joined, then slip-on flanges are not 
permitted and butt-welding flanges are required. The configuration in 
Figure 127.4.4B(b) of ASME B31.1 (incorporated by reference; see 46 CFR 
56.01-2), using a face and backweld, may be preferable where 
eliminating void spaces is desirable. For systems of Class II, the size 
of the strength fillet may be limited to a maximum of 0.525 inch 
instead of 1.4T, and the distance from the face of the flange to the 
end of the pipe may be a maximum of three-

[[Page 76248]]

eighths of an inch. Restrictions on the use of slip-on flanges appear 
in 46 CFR 56.50-105 for low-temperature piping systems.
    (4) Figure 56.30-10(b), Method 4. ASME B16.5 socket welding flanges 
may be used in Class I or II-L systems not exceeding 3 NPS for class 
600 and lower class flanges and 21/2NPS for class 900 and class 1500 
flanges within the service pressure-temperature ratings of the 
standard. Whenever full radiography is required by 46 CFR 56.95-10 for 
the class, diameter, and wall thickness of the pipe being joined, the 
use of socket welding flanges is not permitted and a butt weld type 
connection must be provided. For Class II piping, socket welding 
flanges may be used without diameter limitation, and the size of the 
fillet weld may be limited to a maximum of 0.525 inch instead of 1.4T. 
Restrictions on the use of socket welds appear in 46 CFR 56.50-105 for 
low temperature piping systems.
    (5) Figure 56.30-10(b), Method 5. Flanges fabricated from steel 
plate meeting the requirements of part 54 of this chapter may be used 
for Class II piping for pressures not exceeding 150 pounds per square 
inch and temperatures not exceeding 450 [deg]F. Plate material listed 
in UCS-6(b) of section VIII of the ASME Boiler and Pressure Vessel Code 
(incorporated by reference; see 46 CFR 56.01-2) may not be used in this 
application, except that material meeting ASTM A 36 (incorporated by 
reference, see 46 CFR 56.01-2) may be used. The fabricated flanges must 
conform at least to the ASME B16.5 class 150 flange dimensions. The 
size of the strength fillet weld may be limited to a maximum of 0.525 
inches instead of 1.4T and the distance from the face of the flange to 
the end of the pipe may be a maximum of three-eighths inch.
    (6) Figure 56.30-10 (b), Method 6. Steel plate flanges meeting the 
material and construction requirements listed in paragraph (b)(5) of 
this section may be used for Class II piping for pressures not 
exceeding 150 pounds per square inch or temperatures not exceeding 650 
[deg]F. The flange shall be attached to the pipe as shown by Figure 
56.30-10(b). Method 6. The pressure shall not exceed the American 
National Standard Service pressure temperature rating. The size of the 
strength fillet weld may be limited to a maximum of 0.525 inch instead 
of 1.4T and the distance from the face of the flange to the end of the 
pipe may be a maximum of three-eighths inch.
    (7) Figure 56.30-10 (b), Method 7. Lap joint flanges (Van Stone) 
may be used for Class I and Class II piping. The Van Stone equipment 
must be operated by competent personnel. The ends of the pipe must be 
heated from 1,650[deg] to 1,900 [deg]F. dependent on the size of the 
pipe prior to the flanging operation. The foregoing temperatures must 
be carefully adhered to in order to prevent excess scaling of the pipe. 
The extra thickness of metal built up in the end of the pipe during the 
forming operation must be machined to restore the pipe to its original 
diameter. The machined surface must be free from surface defects and 
the back of the Van Stone lap must be machined to a fine tool finish to 
furnish a line contact with the mating surface on the flange for the 
full circumference as close as possible to the fillet of the flange. 
The number of heats to be used in forming a flange must be determined 
by the size of the pipe and not more than two pushups per heat are 
permitted. The width of the lap flange must be at least three times the 
thickness of the pipe wall and the end of the pipe must be properly 
stress relieved after the flanging operation is completed. 
Manufacturers desiring to produce this type of joint must demonstrate 
to a marine inspector that they have the proper equipment and personnel 
to produce an acceptable joint.
    (8) Figure 56.30-10 (b), Method 8. Welding neck flanges may be used 
on any piping provided the flanges are butt-welded to the pipe. The 
joint must be welded as indicated by Figure 56.30-10(b), Method 8, and 
a backing ring employed which will permit complete penetration of the 
weld metal. If a backing ring is not used, refer to 46 CFR 56.30-5(b) 
for requirements.
    (9) Figure 56.30-10 (b), Method 9. Welding neck flanges may also be 
attached to pipe by a double-welded butt joint as shown by Figure 
56.30-10(b), Method 9.
    (10) Figure 56.30-10 (b), Method 10. Flanges may be attached by 
shrinking the flange on to the end of the pipe and flaring the end of 
the pipe to an angle of not less than 20[deg]. A fillet weld of the 
size shown by Figure 56.30-10(b), Method 10, must be used to attach the 
hub to the pipe. This type of flange is limited to a maximum pressure 
of 300 pounds per square inch at temperatures not exceeding 500 [deg]F.
    (11) Figure 56.30-10(b), Method 11. The flange of the type 
described and illustrated by Figure 56.30-10(b), Method 10, except with 
the fillet weld omitted, may be used for Class II piping for pressures 
not exceeding 150 pounds per square inch and temperatures not exceeding 
450 [deg]F.
    (12) Figure 56.30-10(b), Method 12. High-hub bronze flanges may be 
used for temperatures not exceeding 425 [deg]F. The hub of the flange 
must be bored to a depth not less than that required for a threaded 
connection of the same diameter leaving a shoulder for the pipe to butt 
against. A preinserted ring of silver brazing alloy having a melting 
point not less than 1,000 [deg]F and of sufficient quantity to fill the 
annular clearance between the flange and the pipe must be inserted in 
the groove. The pipe must then be inserted in the flange and sufficient 
heat applied externally to melt the brazing alloy until it completely 
fills the clearance between the hub and the flange of the pipe. A 
suitable flux must be applied to the surfaces to be joined to produce a 
satisfactory joint.
    (13) Figure 56.30-10(b), Method 13. The type of flange as described 
for Figure 56.30-10(b), Method 12, may be employed and in lieu of an 
annular groove being machined in the hub of the flange for the 
preinserted ring of silver brazing alloy, a bevel may be machined on 
the end of the hub and the silver brazing alloy introduced from the end 
of the hub to attach the pipe to the flange.
    (14) Figure 56.30-10(b), Method 14. Flanges may be attached to 
nonferrous pipe by inserting the pipe in the flange and flanging the 
end of the pipe into the recess machined in the face of the flange to 
receive it. The width of the flange must be not less than three times 
the pipe wall thickness. In addition, the pipe must be securely brazed 
to the wall of the flange.
    (15) Figure 56.30-10(b), Method 15. The flange of the type 
described and illustrated by Figure 56.30-10(b), Method 14, except with 
the brazing omitted, may be used for Class II piping and where the 
temperature does not exceed 250 [deg]F.

[[Page 76249]]

[GRAPHIC] [TIFF OMITTED] TR16DE08.002


    Note to Fig. 56.30-10(b): ``T'' is the nominal pipe wall 
thickness used. Consult the text of paragraph (b) for modifications 
on Class II piping systems. Fillet weld leg size need not exceed the 
thickness of the applicable ASME hub.


    Dated: December 4, 2008.
Steve G. Venckus,
Chief, Office of Regulations and Administrative Law, U.S. Coast Guard.
 [FR Doc. E8-29587 Filed 12-15-08; 8:45 am]

BILLING CODE 4910-15-P
