Sec. 14-3.2. General rules for repairs

(a) Authorization.

(1) Repairs to boilers shall be performed by an organization in possession of a valid National Board or New York State Repair Certificate of Authorization and/or a valid ASME Certificate of Authorization. The repair organization shall have a documented quality control program containing a description of the scope of work it intends to perform with supporting welding procedures and qualification reports in accordance with section IX of the ASME Code. Welded repairs of a routine nature as specified in paragraphs (c)(1) through (9) of this section may be performed without stamping by the repair organization of the boiler (Fig. 14-3 b) or signoff of the repair form by the insurance company inspector.

(2) Stamping or nameplate application. When required by this Part, the nameplate or stamping (Fig. 14-3 b) shall be applied to the repaired boiler adjacent to the original manufacturer's stamping or nameplate. The letters shall be at least 5/32 inch high.

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(b) Examples of repairs.

Repairs shall be work such as, but not limited to, the following examples:

(1) welded repairs or replacements of pressure parts or attachments that have failed in a weld or in the base material;

(2) the addition of welded attachments to pressure parts such as, but not limited to:

(i) studs for insulation or refractory lining;

(ii) hex steel or expanded metal for refractory lining;

(iii) ladder clips;

(iv) brackets;

(v) tray support rings;

(vi) corrosion-resistant strip lining;

(vii) corrosion-resistant weld overlay; and

(viii) weld build-up of wasted areas;

(3) replacement of heat exchanger tube sheets in accordance with the original design;

(4) replacement of boiler or heat exchanger tubes where welding is involved;

(5) in a boiler, a change in the arrangement of tubes in furnace walls, economizer or superheater sections;

(6) replacement of pressure retaining parts identical to those existing on the boiler and described on the original manufacturer's data report such as, but not limited to:

(i) replacement of furnace floor tubes or sidewall tubes, or both, in a boiler;

(ii) replacement of a shell or head in accordance with the original design;

(iii) rewelding a circumferential or longitudinal seam in a shell or head; and

(iv) replacement of nozzles;

(7) installation of new nozzles or openings of such a size that reinforcement is not a consideration;

(8) the addition of a nozzle where reinforcement is a consideration may be considered to be a repair provided the nozzle is identical to one in the original design, is located in a similar part of the vessel, and is not closer than three times its diameter from another nozzle;

(9) the installation of a flush patch to a boiler;

(10) welding of gage holes;

(11) welding of wasted or distorted flange faces;

(12) replacement of slip-on flanges with weld neck flanges or vice versa;

(13) seal welding of butt straps and rivets; and

(14) the replacement of a riveted section by welding, subject to the administrative procedures of the jurisdiction and acceptance of the authorized inspector.

(c) Repairs of a routine nature.

Routine repairs include, but are not limited to:

(1) welded repair or replacement of tubes or pipes and attachments;

(2) the addition of nonpressure attachments to pressure parts where postweld heat treatment is not required;

(3) weld build-up of wasted areas;

(4) corrosion-resistant weld overlay;

(5) replacement of boiler tubes where welding is involved;

(6) a change in arrangement of tubes in furnace walls, economizer or superheater sections;

(7) replacement of nozzles where reinforcement is not a consideration;

(8) welding gage holes; and

(9) replacement of slip-on flanges with weld neck flanges or vice versa where nondestructive examination of the welded joints is not a requirement of the applicable ASME Code.