SPS 341.31(4)(b)
(b) A thermometer well located near the water outlet connection and in contact with the retained water in the tank.
SPS 341.31(4)(c)
(c) A gage glass at least one-half inch in diameter with the lower connection to the glass at a point about 6 inches below the water line and the upper connection at a point about 6 inches above the water line.
SPS 341.31(4)(e)
(e) Connections designed so that freezing will not close the inlet, the outlet or the vent.
SPS 341.31(5)
(5) Vent piping. All blowoff equipment shall have vent piping, full size, piped to the outside atmosphere and discharged to a safe location.
SPS 341.31 Note
Note: Blowoff equipment designed in accordance with the boiler blowoff equipment rules issued by the National Board of Boiler and Pressure Vessel Inspectors will meet the requirements of this section. Other methods of designing blowoff equipment may be used if approved by the Department.
SPS 341.31 History
History: Cr.
Register, February, 1988, No. 386, eff. 3-1-88; am. (4) (d) and (e), r. (4) (f), cr. (5),
Register, December, 1992, No. 444, eff. 1-1-93;
am. (2), (3), (4) (a),
Register, June, 1996, No. 486, eff. 7-1-96; am. (2),
Register, February, 2000, No. 530, eff. 3-1-00;
CR 05-025: am. (1) (a)
Register October 2005 No. 598, eff. 11-1-05; correction in (3) made under s.
13.92 (4) (b) 7., Stats.,
Register December 2011 No. 672;
CR 11-047: am. (1) (b), (2), (4) (intro.) to (d)
Register May 2012 No. 677, eff. 6-1-12.
SPS 341.32
SPS 341.32
Pressure gages for air receivers. SPS 341.32(1)(1)
Gage location. Air receivers shall be equipped with an indicating pressure gage so located as to be readily visible.
SPS 341.32(2)
(2) Gage dial. The dial of the pressure gage shall be graduated to approximately double the pressure at which the safety valve is set, but may not be less than one and one-half times that pressure.
SPS 341.32 History
History: Cr.
Register, February, 1988, No. 386, eff. 3-1-88.
SPS 341.33
SPS 341.33
Protection of vessels supplied through pressure-reducing stations. SPS 341.33(1)
(1)
Sizing safety valves. The requirements in this section shall be used for determining the sizes of safety valves on pressure vessels such as pressure cookers, indirect hot water heaters and equipment in heating systems, that are supplied through pressure-reducing stations from boilers carrying a higher steam pressure. Where a pressure-reducing station is supplied from a boiler, the capacity of the safety valves on the low-pressure side of the system need not exceed the capacity of the boiler.
SPS 341.33(2)(b)
(b) The critical flow capacity data supplied by the reducing valve manufacturer may be used in place of the above formula to select the required safety valve capacity. The capacity calculations shall be the largest obtainable by internal trim change of the reducing valve.
SPS 341.33(2)(c)
(c) In using Table 341.33-1, the pressure-reducing station inlet pressure is the lowest set pressure of any safety valve on the high pressure side of the pressure-reducing station.
SPS 341.33(3)
(3) Bypass capacity. The following formula shall be used to determine the steam flow rate through the bypass when pressure-reducing stations are arranged with a valved bypass that also acts as a potential steam source hazard in case the bypass is left open. -
See PDF for diagram 
-
See PDF for table
Where capacities are not shown for inlet and outlet conditions, use the highest capacity shown under the applicable inlet pressure column.
-
See PDF for table SPS 341.33 Note
Note: In applying Table 341.33-2, the area of the pipe is always based upon standard weight pipe and the inlet size of the pressure-reducing valve.
SPS 341.33 History
History: Cr.
Register, February, 1988, No. 386, eff. 3-1-88; am. intro., (1)(intro.), (2), r. and recr. (1) (a) and (b),
Register, May, 1994, No. 461, eff.6-1-94; am. (1) (a),
Register, June, 1996, No. 486, eff. 7-1-96; correction in (1) (intro.), (b), (2) made under s.
13.92 (4) (b) 7., Stats.,
Register December 2011 No. 672;
CR 11-047: (intro.), (1) (intro.) to (c), (2), (3) renum. to be (1), (2) (intro.) to (b), (3), (4)
Register May 2012 No. 677, eff. 6-1-12.
SPS 341.34(1)(1)
Permit required. The owner or user of a portable boiler located in Wisconsin or brought into Wisconsin for use, shall possess a permit to operate issued by the department prior to use.
SPS 341.34(2)
(2) Boiler requirements. The permit to operate shall be issued only after all of the following requirements are met:
SPS 341.34(2)(b)
(b) The boiler is installed according to the applicable requirements of this chapter.
SPS 341.34(2)(c)
(c) An internal or external inspection of the boiler has been made that is acceptable to the department.
SPS 341.34 History
History: Cr.
Register, February, 1988, No. 386, eff. 3-1-88; am.
Register, February, 2000, No. 530, eff. 3-1-00; correction in (2) (a) made under s.
13.92 (4) (b) 7., Stats.,
Register December 2011 No. 672;
CR 11-047: am. (2) (c)
Register May 2012 No. 677, eff. 6-1-12.
SPS 341.35
SPS 341.35
Interconnected boilers. When boilers of different maximum allowable working pressures with minimum safety valve settings varying more than 6% are so connected that steam can flow toward the lower pressure units, the latter shall be protected by additional safety valve capacity, if necessary, on the lower pressure side of the system. The additional safety valve capacity shall be based upon the maximum amount of steam that can flow into the lower pressure system. The additional safety valves shall have at least one valve set at a pressure not to exceed the lowest allowable pressure and the other valves shall be set within a range not to exceed 3% above that pressure.
SPS 341.35 History
History: History: Cr.
Register, February, 1988, No. 386, eff. 3-1-88;
CR 11-047: am.
Register May 2012 No. 677, eff. 6-1-12.
SPS 341.36
SPS 341.36
Identification of boilers and pressure vessels. Boilers and pressure vessels subject to periodic inspections shall be identified by a registration number supplied by the department. The registration number shall be affixed
to the vessel by a certified inspector at a location that can be easily viewed.
SPS 341.36 History
History: Cr.
Register, February, 1988, No. 386, eff. 3-1-88; am. (2),
Register, October, 1996, No. 490, eff. 11-1-96; r. (1),
Register, February, 2000, No. 530, eff. 3-1-00;
CR 11-047: r. (2) (title), renum. (2) to be 341.36 and am.
Register May 2012 No. 677, eff.6-1-12.
SPS 341.37(1)(1)
Corrosion prevention. All boilers and pressure vessels shall be installed and maintained in such a manner as to prevent excessive corrosion and deterioration.
SPS 341.37(2)
(2) Safe conditions. The certified inspector shall note conditions during internal inspection, external inspection, or hydrostatic pressure test and shall order changes or repairs that will place the boiler or pressure vessel in a safe working condition.
SPS 341.37 Note
Note: Sections VI and VII of the ASME boiler and pressure vessel code, Recommended Rules for Care and Operation of Heating Boilers and Recommended Rules for Care of Power Boilers, are excellent guides for boiler owners and operators.
SPS 341.37(3)
(3) Modification of boiler burner assembly. Any modification to or installation of a boiler burner assembly may not exceed the original stamping of the boiler rated output capacity.
SPS 341.37 Note
Note: See section
SPS 341.38 for Department reporting requirements relating to fuel conversions and to modifications for increasing heat input.
SPS 341.37 History
History: Cr.
Register, February, 1988, No. 386, eff. 3-1-88; am. (2),
Register, October, 1996, No. 490, eff. 11-1-96;
CR 08-028: cr. (3)
Register November 2008 No. 635, eff. 12-1-08;
CR 11-047: am. (2)
Register May 2012 No. 677, eff. 6-1-12.
SPS 341.38
SPS 341.38
Reporting accidents, repairs and alterations. SPS 341.38(1)(a)(a) If a component of a boiler or pressure vessel or power piping fails and causes an injury that needs more than first aid treatment, the owner or user shall report the facts involved to the department on form SBD-10787-E within 24 hours after the accident.
SPS 341.38(1)(b)
(b) After a failure under
par. (a), the owner or user may not remove or disturb the boiler or pressure vessel or power piping or any of the components nor permit any such removal or disturbance prior to receiving authorization from the department or first class city, except for the purpose of saving human life or preventing further property damage.
SPS 341.38(1)(c)
(c) Any accidents under
par. (a) that occur during the department's non-business hours shall also be reported to the state division of emergency management.
SPS 341.38 Note
Note: The address for reporting accidents to the Department is the Division of Industry Services, Boiler Program, P.O. Box 7302, Madison, WI 53707-7302; and the fax number is 608-283-7420.
SPS 341.38 Note
Note: The Department can be contacted at 262/548-8617 during normal business hours. The state Division of Emergency Management can be contacted at (800) 943-0003 during non-business hours.
SPS 341.38(2)
(2) Repairs and alterations. The owner or user shall report to the department any repairs or alterations of a boiler or pressure vessel as required in subch.
VI.
SPS 341.38(3)
(3) Fuel conversions. The owner or user shall report to the department conversions of the boiler's primary fuels to other fuels and shall use department form SBD-6314-E for this notification.
SPS 341.38(4)
(4) Heat input. The owner or user shall report to the department any modification that increases the heat input capacity of the boiler and shall use department form SBD-6314-E for this notification.
SPS 341.38 Note
Note: The Department forms required in this chapter are available for a nominal fee at telephone 800-DOC-SALE or 411 (Telecommunications Relay), or at
docsales@doa.state.wi.us, or at no charge at the Department's Web site at
www.dsps.wi.gov through links to Division of Industry Services forms.
SPS 341.38 History
History: Cr.
Register, February, 1988, No. 386, eff. 3-1-88; am. (1) to (3), cr. (4),
Register, February, 2000, No. 530, eff. 3-1-00;
CR 08-028: r. and recr. (1), am. (3) and (4)
Register November 2008 No. 635, eff. 12-1-08;
CR 11-047: r. and recr. (1), am. (3), (4)
Register May 2012 No. 677, eff. 6-1-12.
SPS 341.39(1)(1)
Authority. Only the department may condemn a boiler or pressure vessel. Any boiler or pressure vessel declared by a certified inspector to be unsafe and beyond repair shall be referred to the department for condemnation proceedings.
SPS 341.39(2)(b)
(b) Letters used for the stamp shall be at least 3/8-inch high and arrowheads shall be at least 1/2-inch wide.
SPS 341.39(3)
(3) Unlawful use. It shall be unlawful for any person, firm, partnership or corporation to use, operate, or offer for sale for operation within the state any condemned boiler or pressure vessel.
SPS 341.39 History
History: Register, February, 1988, No. 386, eff. 3-1-88; am. (1),
Register, October, 1996, No. 490, eff. 11-1-96.
SPS 341.40
SPS 341.40
Application. This subchapter applies to all boilers and pressure vessels, or components thereof, that are installed on or after June 1, 2012.
SPS 341.41(1)
(1)
Boiler or pressure vessel installation registration. SPS 341.41(1)(a)(a) Except as provided in
par. (b), the installation of any boiler or pressure vessel shall be registered with the department by the installer before the operation of the boiler or pressure vessel. Registration shall be on form SBD-6314-E.
SPS 341.41 Note
Note: The Department forms required in this chapter are available for a nominal fee at telephone 800-DOC-SALE or 411 (Telecommunications Relay), or at
docsales@doa.state.wi.us, or at no charge at the Department's Web site at
www.dsps.wi.gov through links to Division of Industry Services forms.
SPS 341.41(1)(b)
(b) Registration with the department is not required for any of the following:
SPS 341.41(1)(b)2.
2. Installations in cities of the first class if an installation registration form has been filed with the appropriate city official.
SPS 341.41(2)(a)(a) Except as provided in
par. (b), the installation of any power piping system shall be registered with the department by the installer before the operation of the piping system. Registration shall be on form SBD-5204-E.
SPS 341.41 Note
Note: The Department forms required in this chapter are available for a nominal fee at telephone 800-DOC-SALE or 411 (Telecommunications Relay), or at
docsales@doa.state.wi.us, or at no charge at the Department's Web site at
www.dsps.wi.gov through links to Division of Industry Services forms.
SPS 341.41(2)(b)2.
2. Installations in cities of the first class if an installation registration form has been filed with the appropriate city official.
SPS 341.41(2)(b)3.
3. Underground power piping systems that are not located in a walk-in tunnel.
SPS 341.41(2)(b)4.
4. Power piping replacements, modifications and alterations to existing systems and for new installations, any of which do not exceed 50 feet in length.
SPS 341.41 Note
Note: Section
SPS 341.16 (2) (c) requires the piping installer to notify the Department or authorized agent or a certified inspector at least 5 business days prior to the installation to schedule an inspection.
SPS 341.41(3)
(3) Piping on single power boilers. ASME form P-4B is not required to be completed for boiler piping on any single ASME “S", “M" or “E" stamped boiler rated at 50 boiler horsepower or less and 150 psig or less maximum allowable working pressure, if applicable pressure and temperature rated valves and at least schedule 80 pipe and fittings are used.
SPS 341.41(4)
(4) Installation registration for solid-fuel-fired water-heating appliances. SPS 341.41(4)(a)(a) Except as specified in
par. (b), the installer of a solid-fuel-fired water-heating appliance shall register the unit with the department and shall use department form SBD-6314-E for the registration.
SPS 341.41(4)(b)
(b) Registration of a solid-fuel-fired water-heating appliance installed at a one- or 2-family dwelling is not required.
SPS 341.41 Note
Note: The Department forms required in this chapter are available for a nominal fee at telephone 800-DOC-SALE or 411 (Telecommunications Relay), or at
docsales@doa.state.wi.us, or at no charge at the Department's Web site at
www.dsps.wi.gov through links to Division of Industry Services forms.
SPS 341.41 History
History: Cr.
Register, February, 1988, No. 386, eff. 3-1-88; am. (1) (a) and (2) (a),
Register, December, 1992, No. 444, eff. 1-1-93;
CR 05-025: am. (2) (b), cr. (3)
Register October 2005 No. 598, eff. 11-1-05;
CR 08-028: cr. (2) (b) 5., (c) and (4)
Register November 2008 No. 635, eff. 12-1-08; correction in (1) (b) 1. made under s.
13.92 (4) (b) 7., Stats.,
Register December 2011 No. 672;
CR 11-047: am. (1) (a), (b) (intro.), 1., (2) (a), renum. (2) (c) to be (2) (b) 5. (note) and am., am. (4) (b)
Register May 2012 No. 677, eff. 6-1-12.
SPS 341.42(1)(1)
ASME code compliance. Except as provided in
ss. SPS 341.43 to
341.45 and
341.53 (2), boilers and pressure vessels shall be constructed, installed, operated and maintained in accordance with the ASME code, ASME CSD-1 and the NBIC. Boilers and pressure vessels designed to other national or international standards may be approved if the design has been accepted by a nationally recognized independent third party and the department, or if the standard has been accepted by the department.
SPS 341.42 Note
Note: Section
SPS 341.43 also allows construction of boilers and pressure vessels that do not comply with the ASME code, if they comply with criteria in a variance issued by the Department. As referenced in section
SPS 341.05, any such variance must comply with chapter SPS 303, which requires establishing an equivalency that meets the intent of the rule.
SPS 341.42 Note
Note: The Department will recognize the applicable case interpretations of the ASME boiler and pressure vessel code as being acceptable.
