[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: 46CFR54.05-15]

[Page 149-151]
 
                           TITLE 46--SHIPPING
 
   CHAPTER I--COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED)
 
PART 54_PRESSURE VESSELS--Table of Contents
 
                      Subpart 54.05_Toughness Tests
 
Sec. 54.05-15  Weldment toughness tests--procedure qualifications.

    (a) Plate for which Charpy V-notch impact testing is required in the 
parent material and for which V-notch minima are specified shall 
similarly have welding procedures qualified for toughness by Charpy V-
notch testing. For these tests, the test plates shall be oriented with 
their final rolling direction parallel to the weld axis (i.e., so that 
transverse impact specimens result), and with the V-notch normal to the 
plate surface. The sample weld joint preparation shall be the same as 
that used in production. The number of test specimens and the location 
of their notches shall be as shown in Figure 54.05-15(a) and as 
described in paragraphs (a) (1) through (5) of this section.
    (1) Three specimens with the notch centered in the weld metal.
    (2) Three specimens with the notch centered on the fusion line 
between parent plate and weld. (The fusion line may be identified by 
etching the specimen with a mild reagent.)

[[Page 150]]

    (3) Three specimens with the notch centered in the heat affected 
zone, 1 mm from the fusion line.
    (4) Same as paragraph (a)(3) of this section, but 3 mm from the 
fusion line.
    (5) Same as paragraph (a)(3) of this section, but 5 mm from the 
fusion line.
[GRAPHIC] [TIFF OMITTED] TC01FE91.020

       Figure 54.05-15(a)--Charpy V-notch specimen removal details
    (b) Plate materials for which Charpy V-notch minimums are not 
specified, or for which a Charpy V-notch correlation with NDT is not 
known, and which are themselves tested for toughness by the drop-weight 
procedure, shall have

[[Page 151]]

welding procedures similarly qualified by the drop-weight test. For such 
qualifications, two drop-weight specimens are to be tested, with the 
notch positioned directly above and parallel to the centerline of the 
weld.
    (c) Piping welding toughness tests shall be qualified, by making 
Charpy V-notch impact tests as prescribed in paragraph (a) of this 
section.
    (d) Materials which are specially approved based on toughness 
criteria or tests, other than those discussed in paragraphs (a) and (b) 
of this section, shall have welding procedures tested and qualified for 
toughness as deemed appropriate and necessary by the Commandant.
    (e) In the case of stainless steels, weld procedure toughness tests 
may be limited to weld metal only if this is all that is required by 
Sec. 54.25-15.