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Federal Register / Vol. 86, No. 199 / Tuesday, October 19, 2021 / Proposed Rules
boilers and pressure vessels respectively.

302. Amend 59.1010 as follows:
a. In paragraphs a1, 2, and 3, remove the word shall wherever it appears and add, in its place, the word must; and b. Revise paragraphs d, e, and f.
The revisions read as follows:
59.1010

Corroded surfaces.

d Where stayed sheets have corroded to a depth not exceeding 40
percent of their original thickness, they may be reinforced or built up by welding. Where the staybolts are fitted with riveted heads, the staybolts in the reinforced area must be renewed, but where the staybolts are fitted with nuts, the nuts may be removed and after reinforcing has been applied, collars may be welded around the staybolts in lieu of the nuts. Such reinforced areas must not exceed 400 square inches nor more than 30 inches in one direction.
Two such areas in any one plate may be reinforced: Provided, that the distance between the reinforced surfaces is not less than 30 inches.
e When the corroded portion of a staybolted surface exceeds 400 square inches, it is permissible to make repairs by cutting out the defective portion and replacing it with a new plate, the edges of the new plate to be welded in position. In such cases, new staybolts must be fitted, and where welding is performed through a line of staybolts, welded collars must be used to attach the staybolts.
f Eroded seams of welded pressure vessels may be repaired by rewelding the wasted portion. The wasted section of the seam must be excavated sufficiently by grinding, flame or arc gouging or chipping to ensure proper weld penetration. Rewelded seams must be nondestructively tested in accordance with Section VIII of the ASME BPVC incorporated by reference, see 59.012.
Amended
303. In 59.1015, remove the word shall wherever it appears and add, in its place, the word must.
304. Amend 59.1020 as follows:
a. Revise the first two sentences of paragraph a; and b. Remove the last sentence of paragraph b.
The revision reads as follows:

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59.1020
sheets.

Patches in shells and tube
a Unreinforced openings in the shells or drums of boilers or pressure
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59.1025

Amended
305. In 59.1025, remove the word shall wherever it appears and add, in its place, the word must.
306. Revise 59.1030 to read as follows:

59.1015

vessels may be closed by the use of a patch or plate inside the drum or shell and sealed against leakage by welding.
Such plates must have a diameter of at least 2 inches larger than the diameter of the hole and must have a thickness equal to the thickness of the plate to which it is attached.

59.1030

Seal welding.

Where leaks occur in riveted joints or connections, they must be carefully investigated to determine the cause.
Such leaks may be made tight by seal welding the edge, if accepted by the Officer in Charge, Marine Inspection.
307. Amend 59.1035 as follows:
a. Revise paragraph a; and b. In paragraphs b, c, and d, remove the word shall wherever it appears and add, in its place, the word must.
The revision reads as follows:
59.1035
heads.

Wrapper plates and back

a Wrapper plates or back heads must be cut between two rows of staybolts or on a line of staybolts where the thickness is approximately the same as the original construction. If welding is employed on a line of staybolts, the staybolts must be fitted with a welded collar.

308. Amend 59.151 as follows:
a. In the introductory text to paragraph a, remove the word shall and add, in its place, the word must;
b. Revise paragraphs a1 and 2;
c. Remove the last sentence of paragraph b;
d. In paragraph c, remove the text and the length of the distorted area is not more than three corrugations, or, if the maximum distortion does not exceed three-fourths inch for a length greater than three corrugations of distorted area;
e. In paragraph d, remove the word shall and add, in its place, the word must;
f. Revise paragraph e; and g. Redesignate figure 59.151 as figure 59.151.
The revisions read as follows:
59.151

Furnace repairs.

a
1 The furnace must be forced back to a true circular shape, and the Officer
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in Charge, Marine Inspection, may require strongbacks or other acceptable means of support to hold the furnace;
or, 2 The furnace must be adequately stayed as determined by the Officer in Charge, Marine Inspection.

e Furnace crowns which have become distorted, not in excess of the limitations provided in paragraph c of this section, may be repaired by forcing back the distorted section to as nearly a true circle as possible and reinforcing the same by means of a ring, arcor gaswelded to the distorted corrugation as shown in figure 59.151, the welding to be done by welders and welding processors qualified in accordance with part 57 of this subchapter.

59.155

Amended
309. In 59.155b, remove the word shall wherever it appears and add, in its place, the word must.

59.1510

Amended
310. Amend 59.1510 as follows:
a. In paragraph a, remove the words shall be the duty of the chief engineer in charge and add, in their place, the words is the duty of the chief engineer; and b. In paragraph c, remove the word shall wherever it appears and add, in its place, the word must.

59.201

Amended
311. In 59.201, remove the word shall and add, in its place, the word must.

PART 61PERIODIC TESTS AND
INSPECTIONS
312. The authority citation for part 61
continues to read as follows:

Authority: 43 U.S.C. 1333; 46 U.S.C. 2103, 3306, 3307, 3703; sec. 617, Pub. L. 111281, 124 Stat. 2905; E.O. 12234, 45 FR 58801, 3
CFR 1980 Comp., p. 277; Department of Homeland Security Delegation No. 0170.1.
61.011

Amended
313. In 61.011, remove the word shall wherever it appears and add, in its place, the word must.
314. Revise 61.031 to read as follows:

61.031

Incorporation by reference.

a Certain material is incorporated by reference into this part with the approval of the Director of the Federal Register under 5 U.S.C. 552a and 1
CFR part 51. To enforce any edition other than that specified in this section, the Coast Guard must publish a document in the Federal Register and
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