02-658-8 Me. Code R. § 22

Current through 2024-51, December 18, 2024

Section 658-8-22 - Welding of Non-Residential Warm Air Heat Exchangers

8.22.1General

8.22.1.1 Welding of non-residential warm air heat exchangers is permissible only as set forth in this Section (8.22).

8.22.1.2 Welding of residential warm air heat exchangers is not permissible under any circumstances.

8.22.2Consultation With Manufacturer Required

The manufacturer must be consulted to determine whether the welding of a heat exchanger is sound engineering practice. The manufacturer must provide a written statement as to the feasibility of its heat exchanger being welded. If the heat exchanger is no longer in production, a master licensee must make a written request to the Board and obtain written approval from the Board before the repair is undertaken.

8.22.3Master Licensee to Oversee Welding Repair

The repair of a heat exchanger by welding must be performed by a welder in a procedure suitable for the material. A master licensee must oversee such repairs. The master licensee must receive guidance from the welder as to the feasibility and acceptability of performing the welding procedure of the metals prior to the repair of any heat exchanger. After completion of said repairs or welding, the master licensee must obtain a written statement from the welder documenting that the heat exchanger has been welded, tested and is acceptable for use without leakage of flue gases.

8.22.4Documentation of Repair to be Provided to Owner

Written documentation of said repairs or welding must be provided to the owner. The original documentation must be kept on file by the master licensee who requested the welding. A copy of all the repair documents containing, at a minimum, the following information must be sent to the Board:

1. The name of the owner and location where the repairs were completed;

2. The name and address of the welder;

3. Specific area(s) or location(s) where the repair(s) or welding was performed;

4. Written approval of the repair from the manufacturer where applicable;

5. Equipment identification information, i.e., name, model number, serial number and gross Btu rating; and

6. The name, address, and license number of the master licensee who requested the repair.

8.22.5Limitation

Welding repair of a heat exchanger may be performed only once. A subsequent welding repair shall not be made to a heat exchanger unless a master licensee makes written request to the Board and obtains written approval from the Board before the repair is undertaken.

02-658 C.M.R. ch. 8, § 22