Minnesota Administrative Code

1346.0602 SECTION 602 PLENUMS. IMC section 602.2.1 is amended by adding a subsection to read as follows: Section 602.2.1.9. Piping in plenums. Piping carrying flammable or combustible gases or liquids in a plenum must have all connections made by welding or brazing. No flanges, v…

1346.0603 SECTION 603 DUCT CONSTRUCTION AND INSTALLATION. Subpart 1. [Repealed, 34 SR 537] Subp. 2. [Repealed, 44 SR 1085] Subp. 2a. [Repealed, 44 SR 1085] Subp. 3. [Repealed, 44 SR 1085] Subp. 4. [Repealed, 44 SR 1085] Subp. 5. [Repealed, 44 SR 1085] Subp. 6. [Repealed, 44 SR 10…

1346.0604 SECTION 604 INSULATION. Subpart 1. Section 604.1. IMC section 604.1 is amended to read as follows: 604.1 General. Duct insulation shall conform to the requirements in Minnesota Rules, chapter 1322 or 1323, as applicable. Subp. 2. Section 604.3. IMC section 604.3 is amen…

1346.0801 SECTION 801 GENERAL. Subpart 1. Section 801.10. IMC Section 801.10 is amended to read as follows: 801.10 Connection to fireplace. Connection of appliances to chimney flues serving fireplaces is prohibited. Refer to IFGC Section 602 for Decorative Appliances for Installa…

1346.0901 SECTION 901 GENERAL. IMC Section 901 is amended by adding a section to read as follows: 901.5 Unvented heaters and appliances. Unvented room heaters, unvented infrared heaters, and unvented decorative appliances shall not be installed in any dwelling or occupancy. Excep…

1346.1001 SECTION 1001 GENERAL. Subpart 1. Section 1001.1. IMC section 1001.1 is amended as follows: 1001.1 Scope. This chapter shall govern the installation, alteration, and repair of boilers, water heaters, and pressure vessels. Exceptions: 1. Pressure vessels used for unheated…

1346.1004 SECTION 1004 BOILERS. Subpart 1. Section 1004.1. IMC section 1004.1 is amended to read as follows: 1004.1 Standards. Oil-fired boilers and their control systems shall be listed and labeled in accordance with UL 726 or shall utilize burner assemblies and control systems …

1346.1006 SECTION 1006 SAFETY AND PRESSURE RELIEF VALVES AND CONTROLS. Subpart 1. Section 1006.4. IMC section 1006.4 is amended to read as follows: 1006.4 Approval of safety and safety relief valves. Safety and safety relief valves shall meet the requirements of Section I, IV or …

1346.1007 SECTION 1007 BOILER LOW-WATER CUTOFF. Subpart 1. Section 1007.1. IMC section 1007.1 is amended to read as follows: 1007.1 General. Steam and hot water boilers shall be protected with a low-water fuel cutoff control to stop the combustion operation when the water level d…

1346.1011 SECTION 1011 TESTS. IMC section 1011.1 is amended to read as follows: 1011.1 Tests. Upon completion of the assembly and installation of boilers and pressure vessels, acceptance tests shall be conducted in accordance with the requirements of the Minnesota Statutes, secti…

1346.1101 SECTION 1101 GENERAL. IMC section 1101.1 is amended by adding an exception to read as follows: Exception: For all ammonia refrigeration systems, refer to Minnesota Rules, chapter 5230. Statutory Authority: MS s 326B.02; 326B.101; 326B.106; 326B.13 History: 39 SR 690 Pub…

1346.1205 SECTION 1205 VALVES. IMC Section 1205.1.6 is amended to read as follows: 1205.1.6 Expansion tanks. Shutoff valves shall be installed at connections to nondiaphragm-type expansion tanks. The pipe between the boilers or mains and the expansion tank shall be a minimum of 1…

1346.1206 SECTION 1206 PIPING INSTALLATION. Subpart 1. Section 1206.1.1. IMC Section 1206.1.1 is amended to read as follows: 1206.1.1 Prohibited tee applications. Fluid in the supply side of a hydronic system shall not enter a tee fitting through the branch opening. Fluid from tw…

1346.1500 CHAPTER 15, REFERENCED STANDARDS. Subpart 1. [Repealed, 39 SR 690] Subp. 2. Supplemental standards. The standards listed in this part shall supplement the list of referenced standards in chapter 15 of the 2018 IMC. The standards referenced in this rule shall be consider…

1346.1601 SECTION 1601 GENERAL. The IMC is amended by adding a section to read as follows: SECTION 1601 GENERAL 1601.1 General. Chapter 16 governs the installation, testing, or repair of: oil or liquid fuel burners, oil or liquid fuel burning systems, oil or liquid fuel burning e…

1346.1602 SECTION 1602 EQUIPMENT PLACEMENT. The IMC is amended by adding a section to read as follows: SECTION 1602 EQUIPMENT PLACEMENT 1602.1 Placing equipment in operation. After completion of all installations, the installer shall test all safety and operating controls and ven…

1346.1603 SECTION 1603 PILOT OPERATION. The IMC is amended by adding a section to read as follows: SECTION 1603 PILOT OPERATION 1603.1 Pilot operation. Igniter or pilot flames shall be effective to ignite the oil or liquid fuel at the main burner or burners and shall be adequatel…

1346.1604 SECTION 1604 BURNER OPERATION. The IMC is amended by adding a section to read as follows: SECTION 1604 BURNER OPERATION 1604.1 Burner operation. In making tests to determine compliance with the requirements of this section, care shall be exercised to prevent the accumul…

1346.1605 SECTION 1605 TEST METHODS. The IMC is amended by adding a section to read as follows: SECTION 1605 TEST METHODS 1605.1 Method of test. 1. Operational checking. The flue gas, venting, safety, and operating controls of the appliance shall be checked to ensure proper and s…

1346.1606 SECTION 1606 EQUIPMENT. The IMC is amended by adding a section to read as follows: SECTION 1606 EQUIPMENT 1606.1 Equipment information. A. All installations of gas or fuel burners with input above 400,000 Btu/hr and all combination gas or fuel burners must be approved b…

1346.5050 TITLE; INCORPORATION BY REFERENCE. Parts 1346.5050 to 1346.6014 are known and may be cited as the "Minnesota Fuel Gas Code." Chapters 2 to 8 of the 2018 edition of the International Fuel Gas Code ("IFGC"), as promulgated by the International Code Council, Inc., Washingt…

1346.5060 REFERENCES TO OTHER INTERNATIONAL CODE COUNCIL (ICC) CODES. Subpart 1. General. References to other codes and standards promulgated by the International Code Council in the IMC and IFGC are modified in subparts 2 to 10. Subp. 2. Building code. References to the Internat…

1346.5101 ADMINISTRATION. Subpart 1. Scope. This code shall apply to the installation of fuel gas piping systems, fuel gas appliances, gaseous hydrogen systems, and related accessories in accordance with this code. Subp. 2. Gaseous hydrogen systems. Gaseous hydrogen systems shall…

1346.5201 SECTION 201 (IFGC) GENERAL. IFGC Section 201.4 is amended to read as follows: 201.4 Terms not defined. Where terms are not defined through the methods authorized by this chapter, the Merriam-Webster Collegiate Dictionary, available at www.m-w.com, shall be considered as…

1346.5202 SECTION 202 (IFGC) GENERAL DEFINITIONS. Subpart 1. Section 202. IFGC section 202 is amended by adding the following definitions: APPROVED. "Approved" means approval by the building official, pursuant to the Minnesota State Building Code, by reason of: inspection, invest…

1346.5301 SECTION 301 (IFGC) GENERAL. IFGC section 301.3 is amended to read as follows: 301.3 Listed and labeled. Appliances regulated by this code shall be listed and labeled to an appropriate standard by a nationally recognized testing laboratory which is qualified to evaluate …

1346.5304 SECTION 304 (IFGC) COMBUSTION, VENTILATION AND DILUTION AIR. Subpart 1. Section 304.1. IFGC section 304.1 is amended to read as follows: 304.1 General. Air for combustion, ventilation, and dilution of flue gases for appliances installed in buildings shall be provided by…

1346.5306 SECTION 306 (IFGC) ACCESS AND SERVICE SPACE. Subpart 1. Section 306.5. IFGC section 306.5 is amended to read as follows: 306.5 Mechanical equipment and appliances on roofs or elevated structures. Where mechanical equipment or appliances requiring periodic inspection, se…

1346.5307 CONDENSATE DISPOSAL. IFGC section 307.6, Condensate pumps, is deleted in its entirety. Statutory Authority: MS s 326B.02; 326B.101; 326B.106 History: 44 SR 1085 Published Electronically: April 22, 2020

1346.5311 SECTION 311 CARBON MONOXIDE ALARMS. The IFGC is amended by adding a section to read as follows: 311.1 General. Carbon monoxide alarms shall be installed in new and existing rooms containing a fuel-burning appliance that is utilized to control environmental conditions an…

1346.5401 SECTION 401 (IFGC) GENERAL. Section 401.5.1. IFGC Section 401.5 is amended by adding a section to read as follows: 401.5.1 Medium and high pressure identification. Exposed medium and high pressure gas piping systems shall include the operating pressure on the label requ…

1346.5402 SECTION 402 (IFGC) PIPE SIZING. Subpart 1. [Repealed, 34 SR 537] Subp. 2. Section 402.4, Tables. IFGC Section 402.4 is amended by adding tables as follows: Table 402.4(2)A Pipe Sizing Table for Natural Gas Schedule 40 Metallic Pipe Inlet Pressure 7" wc For 0.60 Specific…

1346.5403 SECTION 403 (IFGC) PIPING MATERIALS. Subpart 1. Section 403.4.2. IFGC section 403.4.2 is amended to read as follows: 403.4.2 Steel. Steel and wrought-iron pipe shall not be lighter than Schedule 40 and shall comply with one of the following standards: 1. ASME B36.10, 10…

1346.5404 SECTION 404 (IFGC) PIPING SYSTEM INSTALLATION. Subpart 1. Section 404.6. IFGC section 404.6 is amended to read as follows: 404.6 Underground penetrations prohibited. Gas piping shall not penetrate building foundation walls at any point below grade. Gas piping shall ente…

1346.5406 SECTION 406 (IFGC) INSPECTION, TESTING AND PURGING. Subpart 1. Section 406.1.2. IFGC section 406.1.2 is amended to read as follows: 406.1.2 Alterations, repairs and additions. In the event alterations, repairs or additions are made following the pressure test, the affec…

1346.5409 SECTION 409 (IFGC) SHUTOFF VALVES. Subpart 1. Section 409.1. IFGC section 409.1 is amended by adding subsection 409.1.4 to read as follows: 409.1.4 Main shutoff valve. Piping systems shall be provided with an approved main shutoff valve before the first branch line. The…

1346.5410 SECTION 410 (IFGC) FLOW CONTROLS. IFGC Section 410.3 is amended to read as follows: 410.3 Venting of regulators. Pressure regulators that require a vent shall have an independent vent to the outside of the building. The vent shall be designed to prevent the entry of wat…

1346.5501 SECTION 501 (IFGC) GENERAL. Subpart 1. Section 501.7. IFGC Section 501.7 is amended to read as follows: 501.7 Connection to fireplace. Connection of any appliance to chimney flues serving fireplaces is prohibited. Refer to IFGC Section 602 for Decorative Appliances for …

1346.5503 SECTION 503 (IFGC) VENTING OF APPLIANCES. Subpart 1. Section 503.2.2. IFGC Section 503.2.2 is deleted. Subp. 2. [Repealed, 34 SR 537] Subp. 3. Section 503.5.5. IFGC section 503.5.5 is amended to read as follows: 503.5.5 Size of chimneys. The effective area of a chimney …

1346.5504 SECTION 504 (IFGC) SIZING OF CATEGORY 1 APPLIANCE VENTING SYSTEMS. Subpart 1. [Repealed, 44 1085] Subp. 1a. Table 504.2(3). IFGC Table 504.2(3) is amended to read as follows: In the row with the heading "Maximum Internal Area of Chimney (square inches)," change the phra…

1346.5602 SECTION 602 (IFGC) DECORATIVE APPLIANCES FOR INSTALLATION IN FIREPLACES. Subpart 1. [Repealed, 39 SR 690] Subp. 2. Section 602.3. IFGC Section 602.3 is amended to read as follows: 602.3 Prohibited installations. Decorative appliances for installations in fireplaces shal…

1346.5621 SECTION 621 (IFGC) UNVENTED ROOM HEATERS. IFGC Section 621 is deleted in its entirety and replaced with the following: Unvented room heaters and unvented decorative appliances shall not be installed in any dwelling or occupancy. Statutory Authority: MS s 326B.101; 326B.…

1346.5630 SECTION 630 (IFGC) INFRARED RADIANT HEATERS. Subpart 1. [Repealed, 34 SR 537] Subp. 2. [Repealed, 34 SR 537] Subp. 3. Section 630.3. IFGC section 630.3 is amended to read as follows: 630.3 Combustion and ventilation air. Where unvented infrared heaters are installed, me…

1346.5800 CHAPTER 8 REFERENCED STANDARDS. Subpart 1. [Repealed, 39 SR 690] Subp. 2. Supplemental standards. The standards listed in this part shall supplement the list of referenced standards in chapter 8 of the 2012 IFGC. The standards referenced in this rule shall be considered…

1346.5801 [Renumbered 1346.5901] Published Electronically: October 23, 2009

1346.5802 [Renumbered 1346.5902] Published Electronically: October 23, 2009

1346.5803 [Renumbered 1346.5903] Published Electronically: October 23, 2009