By the Division of Professional Licensure

5.01: Scope and Purpose

248 CMR governs the Board's modifications to NFPA-54.

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5.02: Modifications to Sections of NFPA-54, Chapter 1

(1) Revise NFPA-54 section 1.1.1.1(A) as follows.

Coverage of piping systems shall extend form the point of delivery to the connections with each gas utilization device. For other than undiluted liquefied petroleum gas systems, the point of delivery shall be considered the outlet of the service meter assembly or the outlet of the service regulator or service shut off valve where no meter is provided. For undiluted liquefied petroleum gas systems, the point of delivery shall be considered the outlet of the first stage regulator.

(2) Revise NFPA-54 section 1.1.1.1(B) as follows.

All Gas piping systems, in general for all buildings and structures shall be low pressure (not in excess of ½ P.S.I.G. or 14 inch water column) All low pressure gas piping systems shall be designed using a maximum 0.5 inch water column pressure drop. Special-permission pursuant to 248 CMR 3.00 may be granted for elevated pressure (greater than ½ P.S.I.G. or 14 inch water column) when gas utilization equipment specifically requires higher pressure or when a designed low pressure system requires pipe sizes in excess of four inch I.P.S. An elevated pressure Special-permission request form specified by the Board shall be filled out completely and submitted to the Executive Secretary for the Board. If the Board grants Special-permission, a copy shall be filed with the Inspector before the commencement of any work.

(3) Revise NFPA-54 section 1.1.1.2.(13) as follows.

All Undiluted Liquefied Petroleum or Natural gas piping connections installed for the purpose of providing temporary heat in or adjacent to buildings or structures under construction or renovation shall comply with 248 CMR 3.00 through 7.00:

(4) Revise NFPA-54 section 1.1.2 as follows. Amend the first sentence to read:

Other Standards: In applying NFPA - 54, reference should also be made to the manufacturer's instructions, the serving gas supplier regulations, and local building, heating, plumbing or other codes in effect in the area in which the installation is made,

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5.03: Modifications to sections of NFPA-54, Chapter 5

(1) Revise NFPA-54 section 5.1.1 as follows:

Permits and Piping Plans.

(a) In addition to the permit requirements of 248 CMR 3.05, for gas installations of over 5,000,000 BTU/Hr the following is required:

  1. A plan of the proposed piping system and equipment shall be submitted for approval to the Inspector.
  2. This plan shall contain a written statement from the local gas supplier that such fuel demand is available.
  3. The system shall be designed by a Registered Professional Engineer.

(b) Gas piping systems requiring gas pressure in excess of ½ P.S.I.G. require Special-permission of the Board before being installed. This Special-permission requirement does not apply to propane gas piping systems that are between the first and second stage regulator if the second stage regulator is located outside the building.

(2) Revise NFPA-54 section 5.4.2.1 by adding a last sentence and table as follows:

Diversity factor is an important factor determining the correct gas piping size to be used for supplying domestic ranges in multiple family dwellings; it applies to domestic ranges only and shall not apply to any other gas appliances.

TABLE

Multi-Family Dwellings Diversity Factor in Percent of Total Load for Domestic Gas Ranges with connected Load Ratings of 63,000 Btu/hr. or more per Range
No. of RangesDemand cubic ft/hourPercent of RatingNo. of RangesDemand cubic ft/hourPercent of Ratings
1631001327033
2107851428332
3132701529331
4151601631231
5173551733230
6189501834030
7198501934629
8212422035328
9225392135827
10233312237427
11243372339027
122573524 & Over40827

(3) Replace NFPA-54 section 5.5.1 with the following:

Elevated Pressure Piping to be Labeled: Piping supplying gas at a pressure greater than ½ P.S.I.G. or 14 inch water column shall be labeled:

(a) at a minimum of every ten feet;
(b) at all changes of direction;
(c) on each side of a penetration through a partition, wall or ceiling; and,
(d) at every gas shutoff valve.
(e) The labels shall:

  1. be colored yellow with black lettering;
  2. indicate the type of gas and the pressure contained within the piping system; and
  3. the letters shall be sized so that the labeling can be read from a normal line of vision when standing at the main floor level.

(4) Revise NFPA-54 section 5.6.2.1 as follows:.

Cast-iron and Galvanized Pipe and pipe fittings shall not be used.

(5) Replace NFPA-54 section 5.6.2.2 with the following.

Steel and Wrought-Iron.

(a) Steel and wrought-iron pipe shall be at least of standard weight (schedule 40) and shall comply with one of the following standards:

  1. ANSI/ASME B36.10, Welded and Seamless Wrought-Steel Pipe
  2. ASTM A 53, Standard Specification for Pipe, Steel, Black and Hot Dipped, Zinc-Coated Welded and Seamless.
  3. ASTM A 106, Standard Specification for Seamless Carbon Steel Pipe for High-Temperature Service.

(b) Welding of gas piping systems with pressures under or equal to 70 P.S.I.G shall be performed according to the following:

  1. Welding will be performed by a qualified welder who is a licensed plumber or gas fitter, or under the direct supervision of a licensed plumber or gas fitter. The welding shall conform to a Welding Procedure Specification (WPS), accompanied by a Procedure Qualification Record ( PQR), which will be available to the Inspector.
  2. The WPS and PQR must be in accordance with one of the following:
    1. American Welding Society (AWS) B2.1
    2. American Petroleum Institute (API) 1104
    3. ASME Section IX
  3. The installation shall meet the following Inspection criteria:
    1. A visual Inspection as to the quality of the weld shall be performed in accordance with AWS D1.1 or API 1104 standards
    2. The test pressure used during an Inspection shall comply with the following:
      1. Systems with a maximum operating pressure of ten P.S.I.G. or less, shall be tested to a minimum of three P.S.I.G. or ten times the operating pressure, whichever is greater.
      2. Systems with an operating pressure greater than ten P.S.I.G. and less than 70 P.S.I.G. shall be tested at 100 P.S.I.G.
      3. The test duration shall be one hour for every 100 feet of pipe, or fraction thereof. The minimum test duration shall be one hour and the maximum test duration shall be 24 hours, irrespective of system design.

(c) Welding on gas piping systems with pressures over 70 P.S.I.G. shall be performed according to the following:

  1. All welds shall be full penetration and performed by a qualified welder.
  2. All welds shall be subjected to a 100% X-ray or 100% Ultrasonic Examination (UT) test.
  3. The manifolding in any combination of gas regulators and relief vents is prohibited
  4. All Socket Welded Type Joints on gas piping supplying pressures over 70 P.S.I.G. shall require a magnetic particle test or other recognized non-destructive test.
  5. The gas piping system shall be pressure tested to a minimum of 1.25 times the gas piping systems working pressure.
    1. The test duration shall be a minimum of one hour.
    2. The test shall be witnessed by the Inspector.
  6. The testing company and their authorized field agent that provides the (UT) field examination shall be certified by a recognized and accredited agency in such testing. A copy of the AWS certification shall be submitted to the Board prior to the examination.
  7. Repairs that are made to welded joints that fail the X-Ray or (UT) test shall be re-tested and re-certified. For future reference; the failed welded joint that is re-tested shall be identified by stenciling ½ inch high white lettering at the weld location the date of the re-test.
  8. The Board shall require an affidavit signed by the individual who performed the X-ray or (UT) examination for the testing agency. The affidavit shall state that all welds meet the requirements of the Welding Procedure Specification (WPS) and that all welds passed the X-Ray or (UT) examination.

(6) Replace NFPA-54 section 5.6.3.4 with the following:

For purposes of this section CSST shall mean corrugated stainless steel tubing systems.

Corrugated stainless steel tubing systems must be tested and listed in accordance with ANSI/ LC-1-/CSA 6.26 and installed by manufacturer trained, licensed plumbers and gas fitters The system shall be sized in accordance with NFPA-54 - ANSI Z233.1 - 2002.

(a) CSST Fittings. All fittings and accessories used in the installation of CSST piping systems shall be approved by the CSST manufacturer for use with their system.

(b) CSST Concealed Fittings:

  1. Where gas piping is to be concealed:
    1. connections shall only be made with CSST fittings listed for use in concealed spaces; and
    2. connections shall be produced by the manufacturer of the CSST piping system.
  2. Malleable fittings shall be permitted in concealed locations when used in combination with CSST fittings.
  3. For each malleable fitting there shall only be a single CSST connection.

(c) Repairs to Concealed CSST Piping:

  1. Repairs required in a CSST system which is concealed, or otherwise not readily accessible, shall be repaired with a fitting listed for the CSST system being used.
  2. Installation of an access panel shall be required at the repair site.

(d) Interior Meter Connections: Interior meter connections may be directly connected to the CSST system as long as the meter is securely affixed to the building, and the CSST is secured to the building structure when 24 inches or more of tubing is exposed.

(e) Exterior Meter Connections:

  1. No CSST shall be connected to an exterior meter.
  2. The tubing shall terminate at the foundation wall with a termination fitting, and the meter shall be rigidly connected with steel piping to the building structure.

(f) Sleeved Gas CSST:

  1. CSST shall be sleeved when passing through a metal or concrete deck to protect the integrity of the tubing and be fire - stopped in accordance with the State Building Code.
  2. The sleeve shall be Schedule 40 black or galvanized pipe and shall extend a minimum six inches from the top of the finished floor and the underside of the deck.

(g) Only manifolds for CSST systems supplied and listed by the CSST manufacturer may be concealed.

  1. Assembled manifolds shall be installed in an accessible location as defined in the 2002 NFGC - Z223.1.
  2. Assembled manifold is a piping combination made up of close nipples and malleable tees.

(h) Fireplace Log Installations:

  1. CSST shall terminate with a termination fitting at the entrance to the masonry fire box.
  2. The workmanship shall be performed and completed in such a manner so that the termination will not be exposed to any adverse effects.

(i) Fixed Appliance Connection Using CSST: CSST may be directly connected to a fixed appliance when the following conditions are met.

  1. The tubing is securely attached to the building structure or other means of solid support.
  2. Tubing shall not run exposed for a distance greater than or equal to 30 inches without being physically attached to the building structure or other means of solid support.
  3. CSST terminates with a proper fitting and gas cock.

(j) CSST Used Underground:

  1. When in contact with the earth or other material that could corrode the piping, the CSST shall be installed within a sleeve designed to withstand the superimposed loads.
  2. Except for pre-engineered sleeves that are Product-approved by the Board, the sleeve shall allow free movement of the CSST.
  3. All sleeve ends shall be sealed liquid tight.
  4. An acceptable tape marking system shall be in place no more than six inches from the top of the grade indicating that a gas line is below.
  5. The minimum depth for buried gas piping as describe herein is 18 inches from the top of grade and the minimum size of the CSST to be buried is ¾ inch.

(k) CSST Used as an Appliance Connection: CSST shall not be used as a flexible appliance connector downstream of the appliance shutoff device.

(l) Sizing CSST Systems: CSST systems shall be sized and installed with a maximum 14 inch water column (½ P.S.I.G.) gas pressure unless Special-permission has been granted by the Board.

(m) CSST Installation and Modifications: Installation of CSST in the Commonwealth of Massachusetts shall be in strict compliance with the manufacturer's instructions and the Massachusetts State Plumbing and Gas Code 248 CMR 3.00 through 7.00.

(n) Testing Requirements for CSST Systems:

  1. Before any piping is covered, when CSST piping systems are installed in new construction or remodeling, the system shall be tested as part of the Inspection as prescribed under NFPA-54 Chapter 7.1 as modified under 248 CMR 5.05.
  2. Before piping is connected to any appliance the licensed plumber or gas fitter shall do a second test of the system.
  3. A tag shall be:
    1. affixed to the meter or service manifold acknowledging this test; and
    2. signed and dated by the licensed plumber or gas fitter.

(o) Liquid Leak Detector: No corrosive liquids shall be used in the testing of the CSST system. Some household soaps and detergents may be corrosive to gas and plumbing products.

(p) Exposed CSST Tubing: When CSST is installed outdoors or is subject to corrosive chemicals, exposed stainless CSST tubing (where the jacket has been removed) shall be recovered with tape as specified by the CSST manufacturer. (After the completion of testing.)

(q) CSST Piping Installed on Roofs: CSST shall be installed for roof top equipment only when it is supported by one of the following methods:

  1. The CSST tubing with a UV stabilized jacket is supported the full length of the CSST run.
    1. The tubing shall be affixed to a wooden plank or a steel channel that is securely attached by an appropriate method every six feet to the roof structure.
    2. The tubing shall be attached directly to the support every six-feet.
  2. The CSST tubing is installed within a metal or plastic conduit that is securely attached by an appropriate method every six feet to the roof structure. Where the piping system requires a tee to be installed within the line, the sleeve shall terminate no more than 12 inches from the tee on both runs and the branch line.
  3. For CSST tubing having sizes of 1½ inch and two inches and having a UV stabilized jacket, the following requirements shall be satisfied:
    1. the CSST shall be supported on blocks which are spaced not more than 48 inches apart.
    2. The blocks shall be constructed of materials appropriate for outdoor conditions and shall be securely attached by an appropriate method to the roof structure, and
    3. The method used to attach the CSST to the block shall not damage the plastic coating.
  4. The maximum length of tubing not supported by any method listed shall not exceed 30-inches when connected to a gas fired roof top unit or similar gas equipment.

(7) Revise NFPA-54 section 5.6.7.4 by replacing it with the following:

Thread Compounds: Thread (joint) compounds (pipe dope) and pipe thread sealing tape (Teflon, etc.) shall be resistant to the actions of liquefied petroleum gas or to any other chemical constituents of the gases to be conducted through the piping.

(8) Revise NFPA-54 section 5.12 as follows:

5.12 Acceptable Shutoff Devices: Gas Cocks and Ball Valves installed for use shall either be listed by a nationally recognized testing agency or comply with applicable American Standard Approval or Listing Requirements and shall be Product-Approved by the Board. They shall:

(a) Have clearly indicated open and closed positions and rigidly secured stops to limit both extremes of rotation. W.O.G. Ball Valves lever or Tee Handle Type are acceptable.

(b) Show no evidence of leakage when subjected to an air pressure test of a six inch mercury column (3 P.S.I.G.) for ten minutes.

(c) Be capable of withstanding without deformation, breakage or leakage the following "Turning Effort" standards when screwed onto a pipe fitting:

NOMINAL PIPE SIZETURNING EFFORT
½ inch300 inch-pounds
¾ inch450 inch-pounds
1 inch600 inch-pounds
1¼ inch700 inch-pounds
1½ inch750 inch-pounds
2 inch950 inch-pounds
2½ inch1050 inch-pounds
3 inch1050 inch-pounds

(d) Have a capacity not less than that specified in the following table for 0.60 Specific Gravity, 1000 BTU Per Cubic Foot Gas at 1.0 inch water column pressure drop.

NOMINAL PIPE SIZEMINIMUM CAPACITY
½ inch260,000 BTU Per hour
¾ inch698,000 BTU Per hour
1 inch1,192,000 BTU Per hour
1¼ inch1,768,000 BTU Per hour
1½ inch3,097,000 BTU Per hour
2 inch5,346,000 BTU Per hour
2½ inch6,859,000 BTU Per hour
3 inch11,923,000 BTU Per hour

(e) Each valve shall be marked in a conspicuous place with the manufacturer's name or trademark.

(Testing procedures for 5.12(b), (c), and (d) shall be consistent with those outlined in the American National Standard for Manually Operated Gas Valves).

(9) After NFPA-54 section 5.13 add a new section 5.14 as follows:

5.14 Installation of Consumer-owned Gas Pressure Boosters.

(a) When Special-permission has been granted by the Board and the serving gas supplier has granted its approval, consumer owned gas pressure boosters may be installed in that portion of the gas piping system extending from the outlet of the meter set assembly to the inlet of the equipment requiring the elevated pressure.

(b) Hermetically Sealed: Gas pressure boosters shall be of the hermetically sealed type. Any exception to this provision shall be noted in the applicant's Special-Permission request to the Board.

(c) Proper Location:

  1. Gas pressure boosters shall be installed on a firm foundation or concrete floor and shall be free of vibration.
  2. Gas pressure boosters shall be located in well-ventilated spaces and readily accessible for examination, replacement or necessary maintenance.

(d) Underpressure Protection Device: A manual reset low pressure shutoff device shall be installed between the gas pressure booster and the gas meter to protect against a reduction in supply pressure lower than that acceptable to the serving gas supplier.

(e) Additional Provisions:

  1. Gas pressure boosters shall be installed and maintained in accordance with the manufacturer's instructions.
  2. The gas equipment for which the booster is required, shall be equipped with a properly set, low gas pressure switch that will prove the correct pressure is available before startup.
  3. Check valves shall be installed to prevent the increased pressure from pressurizing the system upstream of the booster. Where bypasses are installed they shall include a shutoff valve and a check valve.
  4. A pressure regulator to maintain a constant outlet pressure shall be installed immediately downstream of the booster (exception: not required if the booster has an integral pressure regulator).

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5.04: Modifications to NFPA-54, Chapter 6

(1) After NFPA-54 section 6.1.6 add a new sub-section 6.1.6.1 as follows:

Minimum Size: Threaded gas piping underground shall be ¾ inch iron pipe size on low-pressure gas systems. Installation shall conform to Section 6.1 Piping Underground.

(2) After NFPA - 54 section 6.3.1 add a new sub-section 6.3.1.1 as follows:

Minimum Size: No gas piping smaller than standard ½ inch iron pipe size shall be installed in any concealed location.

(3) After NFPA -54 section 6.3.4 add a new section 6.3.4.1 as follows:

CSST installed vertically and horizontally in concealed wall spaces or partitions of 2 X 4 construction that does not penetrate the walls, floors or partitions shall be protected in accordance with 248 CMR 5.04: Table II-a.

Table II - a
Protection of CSST Tubing Installed in Concealed Wall Spaces of 2 X 4 Construction

Tubing Orientation and LocationInsulation TypeTubing Size
< 1-inch> 1-inch
Vertical Interior WallNone
  1. Single runs only.
  2. Tubing not secured to structure.
  3. CSST manufacturer specified strike plates at points of penetration.
  4. CSST Strike plates on both sides of wall.
Same as CSST < in and CSST manufacturer specified shielding device along entire length in concealed space.
Horizontal Interior WallNoneCSST manufacturer specified shielding device along length between studs and strike plates at points of penetration on both sides of wall.
Vertical Exterior WallNon-Rigid (Fiberglass)
  1. Single runs only.
  2. Tubing not secured to structure.
  3. Tubing installed between insula-tion and wall board.
  4. CSST manufacturer specified strike plates at points of penetration
Same as CSST < in and CSST manufacturer specified shielding device along entire length in concealed space.
Vertical Exterior WallRigidSchedule 40 pipe or CSST manufacturer specified shielding device along entire length and at points of penetration.

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5.05: Modifications to NFPA-54, Chapter 7

(1) Revise NFPA-54 section 7.1 as follows:

Pressure Testing and Inspection:

(a) Inspection of the rough gas system: Inspections shall conform to the requirements of 248 CMR 3.00 in addition to the following:

  1. Before any gas piping system is put into service, it shall be tested in the presence of the Inspector to insure that it meets the requirements of 248 CMR. Where any part of the gas piping system is to be enclosed or concealed, the test shall be conducted prior to the covering of any portion of the gas piping system. The test medium shall be air or other inert gas (e.g. nitrogen, carbon dioxide). OXYGEN SHALL NEVER BE USED.
  2. Gas piping systems, not in excess of ½ P.S.I.G. or 14 inches water column, extending from the outlet of the meter set assembly to the closed shutoff valve of each appliances shall withstand a pressure of at least six inches mercury or three pounds gauge for a period of not less than ten minutes without showing any drop in pressure. Pressure shall be measured with a mercury manometer, slope gauge or an equivalent device so calibrated as to be read in increments of not greater than 1/10 pound. The source of pressure shall be isolated before the pressure tests are made.
  3. If an additional appliance is connected to a gas piping system previously installed, the additional piping shall be isolated and tested to a pressure of at least six inches of mercury or three pounds gauge for a period of not less than ten minutes without showing any drop in pressure and the remainder of the piping system previously installed may be tested to not more than three inches of mercury or 1½ pounds gauge for a period of not less than ten minutes without showing any drop in pressure.
  4. Gas piping systems for industrial and other large installations shall be tested at a pressure at least ten times (maximum 100 P.S.I.G.) the proposed maximum working pressure. Test duration shall be long enough to determine if there are any leaks but not less than one hour for each 100 linear feet of pipe or fraction thereof. The duration of the test need not exceed 24 hours irrespective of system design.
  5. Gas piping systems for undiluted liquefied petroleum gases. Such gas piping systems shall be tested at a pressure no less than 1½ times the proposed working pressure, but not less than three P.S.I.G. for not less than ten minutes without the gauge showing any drop in pressure, irrespective of design pressure.
  6. All piping before the second stage low pressure regulator in undiluted liquefied petroleum gas systems shall be tested using a pressure not less than the maximum operating pressure of the tank or container, for a period of not less than ten minutes without any drop in pressure.

(b) Inspection of Final Gas System:

  1. After the test of the rough piping for tightness as described in 248 CMR 5.05(1)(a) gas may be turned on and appliances tested at normal operating pressure by means:
    1. of a non-corrosive foaming agent test; or
    2. by the use of an electronic leak detector.
  2. Following the testing and approval of a gas system, the Inspector shall attach a permanent tag in a conspicuous place indicating that the system has passed Inspection.

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5.06: Modifications to NFPA-54, Chapter 8

(1) Revise NFPA-54 section 8.1.1 as follows:

Appliances, Accessories and Equipment to comply with Standard Requirements. All gas appliances, accessories and gas utilization equipment shall comply as follows.

(a) All residential and commercial appliances shall be listed by a nationally recognized testing agency, constructed in accordance with applicable American National Standards Institute (ANSI), and Product-approved by the Board.

(b) Commercial and industrial equipment that is not certified by a nationally recognized testing agency acceptable to the Board shall not be installed unless Special-permission has been granted by the Board or the Inspector has granted his or her approval prior to the installation. Such installation, if allowed, shall be in accordance with NFPA-54 Chapter 11 entitled Procedures for the Initial Operation of Industrial Gas Equipment as modified by 248 CMR 5.09.

(c) A List of Reference Standards acceptable to the Board is provided in Appendix A of NFPA-54. It may be referred to for the installation of specific equipment.

(2) Add new NFPA-54 section 8.1.10.4:

Direct Vent Appliances, as defined in Section 3.3.68, may be installed.

(3) Add the following language after the last paragraph of NFPA-54 section 8.1.11.2:

Exception No. 3: Direct Vent Appliances, as defined in Section 3.3.68 may be installed.

(4) Revise NFPA-54 section 8.1.22 as follows:

(a) The installing agency shall conform to the equipment manufacturers specific recommendations in completing an installation that will provide satisfactory performance and serviceability.

(b) The installing agency shall also leave the manufacturer's installation, operating and maintenance instructions in a location at the premises where they will be readily available for reference and guidance of the authority having jurisdiction, the Inspector, serviceperson and the owner or operator.

(c) When required by the Inspector, a copy of the manufacturer's installation, operating and maintenance instructions shall be given to said authority for review within two working days prior to calling for a final Inspection.

(5) Revise NFPA-54 8.5.1 as follows: Add to sub-section (3) as follows:

(a) In addition to being Product-approved under 248 CMR 3.00, flexible appliance connectors shall meet the requirements of ANSI Z21.24 and shall be approved by a nationally recognized testing agency recognized by the Board.

(b) The maximum length of a connector shall not exceed 36 inches.

(c) A flexible connector shall not be installed where it will be subject to physical or thermal damage.

(d) A flexible appliance connector shall not be used on gas pressure in excess of ½ pound per square inch gauge (P.S.I.G.).

(e) An accessible shutoff valve shall be located on rigid piping upstream of a flexible connector.

(f) Only one flexible connector shall be used for connecting each appliance.

(g) A flexible connector shall not be re-used except for disconnecting and reconnecting the original appliance for servicing.

(h) A flexible connector shall not extend from one room to another nor pass through any walls, partitions, ceilings or floors.

(6) Revise NFPA-54 section 8.5.4 as follows: Add at the end

Laboratories or similar spaces in Schools, Colleges, Universities or similar occupancies or classrooms where gas burning laboratory type equipment is used by students shall be equipped with a single readily accessible emergency master shutoff valve located within the laboratory or space. This valve shall be kept closed except during periods of equipment use. This provision shall also apply whenever alterations to existing gas systems are made.

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5.07: Modifications to NFPA-54, Chapter 9

(1) Revise NFPA-54 section 9.1 by adding the following last sentence:

Unlisted equipment or accessories shall be prohibited unless Product-approval is granted by the Board or the Inspector.

(2) Revise NFPA-54 section 9.1.2 by replacing it with the following language:

Gas utilization equipment shall not be installed so its combustion, ventilation and dilution air is obtained from a bedroom or bathroom. EXCEPTION: Type 1 dryers may be installed in bathrooms when air for combustion and ventilation is introduced to the space according to the following:

(a) The minimum size of the single air intake shall be equal to the size of the exhaust vent of the dryer.

(b) The air for combustion shall not be obtained from a bedroom or bathroom.

(c) The air for combustion shall be obtained from a space that is sized according to 8.3.

(d) The dryer is installed according to 9.4.

(3) Revise NFPA-54 9.6.1 by replacing it to read as follows:

Decorative appliances for installation in vented fireplaces that are installed in bedrooms or bathrooms shall be of the type that obtain all air for combustion directly from the outdoors. When decorative appliances are installed in vented fireplaces, the flue damper must be removed or welded in a fully open position.

(4) Revise NFPA-54 section 9.7.1 to read as follows:

Vented gas fireplaces that are installed in bedrooms or bathrooms shall be of the types and design that obtain all air for combustion directly from the outdoors.

(5) Revise NFPA-54 section 9.8.1 by adding a second sentence as follows:

The specifications for Non- Re-circulating Direct Gas-fired Industrial Air Heaters shall require that there be no more than 50 P.P.M. of Carbon Monoxide in the total volume of air discharged from the unit.

(6) Revise NFPA-54 section 9.8.2 to read as follows: Non-Re-circulating Direct Gas-fired Industrial Air Heaters shall not be used to supply any area containing sleeping quarters or places of public assembly. These units are intended for use in industrial and commercial occupancies, such as commercial kitchens, factories, and warehouses where there is direct relief. All other installations require Special-permission by the Board.

(7) After NFPA-54 section 9.9.1 add a new sub-section 9.9.1.1 as follows:

The specifications for Re-circulating Direct Gas-fired Industrial Air Heaters shall require that there be no more than 50 P.P.M. of Carbon Monoxide in the total volume of air discharged from the unit.

(8) Revise NFPA-54 section 9.9.2.1 to read as follows:

Re-circulating Direct Gas-fired Industrial Air Heaters shall not be used to supply any area containing sleeping quarters or places of public assembly. These units are intended for use in industrial and commercial occupancies, such as factories and warehouses where there is direct relief. All other installations require Special-permission by the Board.

(9) After NFPA-54 section 9.12.8 add a new section, 9.12.9 as follows:

Thermally Actuated Gas Shutoff Valves Used for Commercial Cooking Equipment (In-Line Gas Valves).

When in-line gas valves are used in junction with a fire protection/suppression system, the installation of these valves shall conform to the following:

(a) Only a licensed plumber or gas fitter shall install an in-line gas valve in new or existing gas piping for the purpose of shutting off the gas supply to commercial cooking equipment.

(b) All in-line gas valves shall be mechanical type with manual reset and shall be installed in close proximity to the cooking equipment and shall shut off the gas supply to the equipment served by the hood and duct system protected by the extinguisher/suppression system.

(c) A plan of the 'Mechanical Fuel Shutoff System' shall be submitted to the Inspector prior to any installation.

(d) If a wiring and gas piping plan in which an electrically operated gas valve is necessary for certain equipment it shall be submitted to the Board for Special-permission. When Special-permission has been granted by the Board, a copy of this plan shall be submitted to the Inspector.

(e) When an in-line gas valve is used in conjunction with a fire prevention suppression system, a permanent notice shall be posted at the reset device and gas meter or propane regulator cautioning the operator to shut off the gas to all appliances before resetting the device.

(f) Actuation of the in-line gas valve shall be made in the presence of the Inspector at the time of the gas piping tests.

(g) An annual inspection certificate shall be submitted to the Inspector certifying that the in-line gas valve is in working condition.

(h) In any case not covered by these provisions, contact the Board for a ruling.

(10) Add a new NFPA-54 section 9.12.10 as follows:

Unlisted Food Service Equipment or accessories shall be prohibited unless Product-approved by the Board.

(a) The use of gas range ovens, broilers, or top burners for space heating shall be prohibited.

(b) The installation of gas ranges with match-lit ovens shall be prohibited.

(c) The installation of any listed or unlisted commercial cooking range without a listed type oven safety pilot shall be prohibited.

(11) Revise and replace NFPA-54 section 9.23.1 as follows:

(a) Prohibited Installations: Unvented room heaters shall not be installed in bathrooms or bedrooms.

(b) Only direct vented appliances, (see definition 3.3.68) shall be installed in sleeping quarters, bedrooms and bathrooms and shall be installed in accordance with 248 CMR 3.00 though 7.00.

(12) After NFPA-54 section 9.23.4 add a new section. 9.23.5 as follows:

Un-vented Room Heaters shall be installed in accordance with 527 CMR 30.00 and 248 CMR 3.00 through 7.00:

(a) Permits and Inspections: In addition to complying with 248 CMR 3.05 the following requirements must be satisfied:

  1. A permit shall be obtained from the head of the fire department and the local or state gas inspector having jurisdiction for the installation of all unvented propane or natural gas-fired space/room heaters.
  2. The permits shall be conditioned upon final inspection and approval of installation by the head of the fire department and the local or state gas inspector having jurisdiction.
  3. A copy of the manufacturer's installation/operating literature shall be submitted with each permit application.
  4. Before operation, the Head of the Fire Department and the local or state gas inspector shall inspect the installation for compliance with 527 CMR (Board of Fire Prevention Regulations) and 248 CMR (Board of State Examiners of Plumbers and Gas Fitters).
  5. A final inspection by the state or local gas inspector of the unvented space/room heater shall not be performed until proof is provided that the head of the fire department having jurisdiction has granted a permit.

(b) Unvented propane or natural gas-fired space/room heaters shall conform to ANSI Z21.11.2, be equipped with an oxygen depletion safety (ODS) shutoff system and be Product-approved in accordance with 248 CMR.

(c) Unvented propane or natural gas-fired space/room heaters shall be installed in accordance with their listings and the manufacturer's instructions. Proper clearances to combustibles shall be maintained. In no case shall the clearances be such as to interfere with combustion air and accessibility.

(d) Installations shall be of a permanent type, with a permanently piped fuel supply in accordance with 248 CMR. LPG appliances shall be subject to the storage requirements in accordance with 527 CMR 6.00. Portable unvented propane or natural gas-fired space/room heaters shall be prohibited.

(e) Unvented propane or natural gas-fired space/room heaters shall be prohibited in bedrooms and bathrooms.

(f) Space/room heaters shall be properly sized for the room or space of installation, but shall not exceed a maximum of 40,000 BTU input per room or space.

(g) In occupancies with an unvented propane or natural gas-fired space/room heater, no less than one listed carbon monoxide detector that is installed in accordance with the manufacturers instructions shall be installed and maintained near the space where the heater is located.

  1. Any building wherein the heater is to be installed shall, as a precondition to such installation, have working smoke detectors installed and maintained in accordance with the requirements of 780 CMR (State Board of Building Regulations and Standards) in effect at the time of construction or;
  2. If no requirement was in effect at the time of construction the smoke detector shall be compliant and installed as provided for in M.G.L. c. 148, § 26E.

(h) In rooms and buildings served by an unvented propane or natural gas-fired space/room heater, a primary source of heat, which is operable, shall be permanently installed and maintained in the building in accordance with 105 CMR (Department of Public Health).

(i) Sellers of unvented propane or natural gas-fired space/room heaters shall provide to each purchaser a copy of 527 CMR 30.00 upon sale of the unit.

(13) After NFPA-54 section 9.24 add the following new sub-sections:

(a) 9.24.1 Solenoid Valve: Gas engines shall be equipped with an automatic solenoid gas valve electrically connected to the ignition circuit of the engine that closes whenever the engine stops running.

(b) 9.24.2 Flexible connectors:

  1. Engines operating at gas pressure of 15 P.S.I.G. or less connected to generator of 15 KW or less may use a flexible neoprene hose bearing the manufacturer's name and acceptance for L.P. or Natural Gas service.
  2. Engines operating at gas pressures above 15 P.S.I.G. connected to generators with an output of 15 KW or more shall use a Product-approved flexible connector.

(c) 9.24.3 Fuel Supply: Fuel lines to gas engines shall be supplied only from hard case gas meters.

(d) 9.24.4 Emergency power generators for life safety purposes shall be installed according to the following:

  1. A dedicated fuel line shall be installed for the emergency power generator immediately downstream of the meter assembly or shut off valve (if no meter is provided).
  2. The fuel line for the emergency power generator and the fuel line for the remaining appliances shall have shut off valves installed immediately downstream of the meter fit to enable each line to operate independently.
  3. The installation of pressure regulators, if required, shall enable each fuel line to operate independently and not adversely affect the gas pressure of the other fuel line.
  4. The fuel line for the emergency power generator shall be labeled at:
    1. the shutoff valve,
    2. on each side of the wall, floor or roof penetration, and
    3. every ten feet with the following:

    WARNING: Emergency Power Generator for Life Safety Systems. Do not shut off without the approval of appropriate authorities.

(14) Add a new NFPA-54 section 9.32 as follows:

Gas-fired Kilns. Gas-fired Kilns shall not be installed until after Special-permission under 248 CMR 3.00 has been granted by the Board.

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5.08: Modifications to NFPA-54, Chapter 10

(1) Revise NFPA-54 section 10.5.4.2 by adding a second exception as follows:

Existing chimneys shall be permitted to have their use continued when a gas conversion burner is installed, and shall be equipped with a manually reset device that will automatically shut off the gas to the burner in the event of a sustained back-draft.

(2) Revise 10.8.3 by adding the following additional requirements:

(a) For all side wall horizontally vented gas fueled equipment installed in every dwelling, building or structure used in whole or in part for residential purposes, including those owned or operated by the Commonwealth and where the side wall exhaust vent termination is less than seven (7) feet above finished grade in the area of the venting, including but not limited to decks and porches, the following requirements shall be satisfied:

  1. INSTALLATION OF CARBON MONOXIDE DETECTORS. At the time of installation of the side wall horizontal vented gas fueled equipment, the installing plumber or gasfitter shall observe that a hard wired carbon monoxide detector with an alarm and battery back-up is installed on the floor level where the gas equipment is to be installed. In addition, the installing plumber or gasfitter shall observe that a battery operated or hard wired carbon monoxide detector with an alarm is installed on each additional level of the dwelling, building or structure served by the side wall horizontal vented gas fueled equipment. It shall be the responsibility of the property owner to secure the services of qualified licensed professionals for the installation of hard wired carbon monoxide detectors
    1. In the event that the side wall horizontally vented gas fueled equipment is installed in a crawl space or an attic, the hard wired carbon monoxide detector with alarm and battery back-up may be installed on the next adjacent floor level.
    2. In the event that the requirements of this subdivision can not be met at the time of completion of installation, the owner shall have a period of thirty (30) days to comply with the above requirements; provided, however, that during said thirty (30) day period, a battery operated carbon monoxide detector with an alarm shall be installed.
  2. APPROVED CARBON MONOXIDE DETECTORS. Each carbon monoxide detector as required in accordance with the above provisions shall comply with NFPA 720 and be ANSI/UL 2034 listed and IAS certified.
  3. SIGNAGE. A metal or plastic identification plate shall be permanently mounted to the exterior of the building at a minimum height of eight (8) feet above grade directly in line with the exhaust vent terminal for the horizontally vented gas fueled heating appliance or equipment. The sign shall read, in print size no less than one-half (1/2) inch in size, "GAS VENT DIRECTLY BELOW. KEEP CLEAR OF ALL OBSTRUCTIONS".
  4. INSPECTION. The state or local gas inspector of the side wall horizontally vented gas fueled equipment shall not approve the installation unless, upon inspection, the inspector observes carbon monoxide detectors and signage installed in accordance with the provisions of 248 CMR 5.08(2)(a)1 through 4.

(b) EXEMPTIONS: The following equipment is exempt from 248 CMR 5.08(2)(a)1 through 4:

  1. The equipment listed in Chapter 10 entitled "Equipment Not Required To Be Vented" in the most current edition of NFPA 54 as adopted by the Board; and
  2. Product Approved side wall horizontally vented gas fueled equipment installed in a room or structure separate from the dwelling, building or structure used in whole or in part for residential purposes.

(c) MANUFACTURER REQUIREMENTS - GAS EQUIPMENT VENTING SYSTEM PROVIDED. When the manufacturer of Product Approved side wall horizontally vented gas equipment provides a venting system design or venting system components with the equipment, the instructions provided by the manufacturer for installation of the equipment and the venting system shall include:

  1. Detailed instructions for the installation of the venting system design or the venting system components; and
  2. A complete parts list for the venting system design or venting system.

(d) MANUFACTURER REQUIREMENTS - GAS EQUIPMENT VENTING SYSTEM NOT PROVIDED. When the manufacturer of a Product Approved side wall horizontally vented gas fueled equipment does not provide the parts for venting the flue gases, but identifies "special venting systems", the following requirements shall be satisfied by the manufacturer:

  1. The referenced "special venting system" instructions shall be included with the appliance or equipment installation instructions; and
  2. The "special venting systems" shall be Product Approved by the Board, and the instructions for that system shall include a parts list and detailed installation instructions.

(e) A copy of all installation instructions for all Product Approved side wall horizontally vented gas fueled equipment, all venting instructions, all parts lists for venting instructions, and/or all venting design instructions shall remain with the appliance or equipment at the completion of the installation.

(3) After NFPA-54 section 10.10.4.2 add a new section 10.10.4.3 as follows:

When more than four gas appliances are to be vented through a common gas vent or common horizontal vent manifold, a plan of the proposed vent installation shall be submitted to the Inspector and the serving gas supplier for review and approval.

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5.09: Modifications to NFPA-54, Chapter 11

After NFPA-54 section 11.7 add new 11.8 in sections as follows:

Procedures for Initial Operation of Industrial Gas Equipment as defined in 248 CMR 7.01:

(1) 11.8.1 General:

(a) The following procedures are to be followed in connection with initial operation of gas equipment, necessary adjustments, development of operating instructions, instruction of the operator in the safe and satisfactory use of the equipment and required acceptance tests.

(b) An authorized representative of the gas equipment manufacturer shall be used to start, light, and adjust burners, mixers, flames, blowers, temperature controls and safety devices.

(2) 11.8.2 New Gas Equipment Procedures:

(a) Before initial start, it shall be determined by physical check that all protective devices are connected and operative, the installation is in all respects capable of safe operation, the equipment has been purged in accordance with manufacturer's instructions, and that all concerned persons have been notified.

(b) Initial Start-up and Final Adjustments. An authorized representative of the gas equipment manufacturer shall perform the initial start up, final adjusting and testing of the burner and controls in the presence of the Inspector and a gas company representative.

(c) Operation: Installed protective devices shall be tested under operating conditions as promptly as possible to determine that they are functioning properly. Other instruments and controls should also be tested in the same manner. Gas equipment shall be shut down immediately if any defect is noted during initial start-up or operation. Defects shall be corrected before the equipment is again started. In shutting down equipment, manufacturers instructions and applicable safety requirements shall be followed.

(d) Adjustments: Adjustments to burners, pilots, ignition devices, safety devices, and controls shall be made in accordance with manufacturer's instructions and applicable safety requirements.

(3) 11.8.3 Operating Instructions: Operating instructions, as supplied by equipment manufacturers, shall be assembled and integrated into a system, delivered to the user, and the operator instructed in their use in order to assure safe and satisfactory operation of the equipment.

(4) 11.8.4 Acceptance Tests: Acceptance tests shall be conducted if necessary to establish compliance with applicable codes or requirements of the Inspector.

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REGULATORY AUTHORITY
248 CMR 5.00: M.G.L. c. 112, § 61; M.G.L. c. 142, §§ 13 and 21.