P = (T.S. x t x E)/(R x F.S.)
where P = maximum allowable working pressure, pounds per square inch
T.S. = tensile strength of shell plate, pounds per square inch
t = minimum thickness of shell plates, inches
E = efficiency of longitudinal joint
R = inside radius of the outside course of the shell, inches
F.S. = factor of safety
SPS 341.71 Note
Note: The pressure calculation formula for flat heads and flat surfaces is as follows:
P = (T.S. x t2)/(0.5 x d2 x F.S.)
where P = maximum allowable working pressure, pounds per square inch
T.S. = tensile strength of shell plate, pounds per square inch
t = thickness of plate, inches
d = diameter of head or shortest unsupported span of head or maximum
pitch between stays, inches
F.S. = factor of safety
SPS 341.71 History
History: Cr.
Register, February, 2000, No. 530, eff. 3-1-00.
SPS 341.72
SPS 341.72 Vessels from out-of-state. Secondhand boilers and secondhand pressure vessels, from out-of-state, shall be constructed and stamped according to some edition of the ASME code. A copy of the manufacturer's data report shall be furnished to the department for each vessel indicating that it was manufactured originally to the requirements of an earlier edition of the applicable ASME code. If a vessel has been repaired or altered since its fabrication, a copy of the manufacturer's data report, welded repair report or alteration report shall be furnished to the department.
SPS 341.72 History
History: Cr.
Register, February, 2000, No. 530, eff. 3-1-00.
SPS 341.73
SPS 341.73 Lap seam boilers. Secondhand boilers which have lap seam construction and which are larger than 36 inches in diameter shall be limited to a maximum allowable working pressure of not more than 15 psig.
SPS 341.73 History
History: Cr.
Register, February, 2000, No. 530, eff. 3-1-00;
CR 11-047: am.
Register May 2012 No. 677, eff. 6-1-12.
SPS 341.74
SPS 341.74 Prohibited boilers. The installation of secondhand boilers that have the longitudinal joint exposed to the intense heat of the furnace is prohibited. The locomotive or inside butt strap may not be considered as strengthening or changing the original type of boiler joint.
SPS 341.74 History
History: Cr.
Register, February, 2000, No. 530, eff. 3-1-00;
CR 11-047: am.
Register May 2012 No. 677, eff. 6-1-12.
SPS 341.75(1)
(1)
Hydrostatic pressure test. Every secondhand vessel shall be inspected and given a hydrostatic pressure test at one and one-half times the maximum allowable working pressure at its new point of installation location before it is placed in operation. The test shall be witnessed by a certified inspector.
SPS 341.75(2)
(2) Alternative tests. When the certified inspector determines that a hydrostatic test at one and one–half times the maximum allowable working pressure is not possible or desirable, the certified inspector may accept alternative means to determine if the vessel is safe for its intended use.
SPS 341.75 Note
Note: Where water is used in a hydrostatic test, the temperature of the water should not be less than 70oF and the maximum temperature during inspection should not exceed 120oF. If a test is conducted at 1.5 times the maximum allowable working pressure (MAWP) and the owner specifies a temperature higher than 120oF, the pressure should be reduced to the MAWP and the temperature should be reduced to 120oF for the close examination.
SPS 341.75(3)
(3) Exempt vessels. Boilers and pressure vessels used for portable or emergency use shall be exempt from secondhand vessel test requirements.
SPS 341.75 History
History: Cr.
Register, February, 2000, No. 530, eff. 3-1-00.
SPS 341.76
SPS 341.76 Installation. Except for vessels exempted in
s. SPS 341.18, all secondhand vessels when reinstalled, shall comply with the ASME code in regard to fittings, appliances, valves, connections, settings and supports. These vessels shall also comply with the installation and permit to operate requirements in this chapter.
SPS 341.76 History
History: Cr.
Register, February, 2000, No. 530, eff. 3-1-00; correction made under s.
13.92 (4) (b) 7., Stats.,
Register December 2011 No. 672.
SPS 341.80
SPS 341.80 General requirements. Pressure vessels in petroleum refineries shall comply with the standards specified in API 510.
SPS 341.80 History
History: Cr.
Register, February, 2000, No. 530, eff. 3-1-00.
SPS 341.90
SPS 341.90 Application. This subchapter applies to all historical boilers in operation for demonstration purposes at fairs, museums, steam shows, historical attractions or any other locations frequented by the public.
SPS 341.91(1)
(1) Historical boilers shall be inspected in accordance with NBIC part 2 section 6-supplement 2, Historical Boilers.
SPS 341.91(2)
(2) The owner or user shall obtain and maintain a valid permit to operate in accordance with
s. SPS 341.24.
SPS 341.91(3)
(3) The permit to operate shall be displayed on the historical boiler near the controls during operation at any public location.
SPS 341.91(4)
(4) Welded repairs or alterations shall comply with subch.
VI.
SPS 341.91 History
History: CR 05-025: cr.
Register October 2005 No. 598, eff. 11-1-05;
CR 08-028: am. (title) and (1), r. (2) and (3), renum. (4) to (6) to be (2) to (4)
Register November 2008 No. 635, eff. 12-1-08; correction in (2) made under s.
13.92 (4) (b) 7., Stats.,
Register December 2011 No. 672;
CR 11-047: am. (title), (1)
Register May 2012 No. 677, eff. 6-1-12.
SPS 341.92
SPS 341.92 Testing, maintenance and out-of-state boilers. SPS 341.92(1)(a)1.1. Except as specified in
subd. 2., historical boilers complying with any of the following are exempt from the required ultrasonic testing and calculation requirements:
SPS 341.92(1)(a)2.
2. A certified inspector may require ultrasonic testing and calculations for any historical boiler based on conditions observed during visual or hydrostatic examination.
SPS 341.92(1)(b)
(b) The owner or user of a historical boiler shall maintain the initial and subsequent ultrasonic thickness test grid map and pressure calculations in the permanent boiler records to verify fitness for service and to be used as a reference for future repair analysis.
SPS 341.92 Note
Note: The owner or user may use the NBIC form C-1: Initial Boiler Certification Report. The form is 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 341.92(2)(a)(a) The owner or user of an out-of-state historical boiler shall provide ultrasonic thickness test and pressure-calculation documentation in accordance with NBIC part 2 section 6-supplement 2, Historical Boilers.
SPS 341.92(2)(b)
(b) The owner or user of an out-of-state historical boiler shall provide copies of welded repair or alteration documentation as required in
s. SPS 341.38 (2).
SPS 341.92(2)(c)
(c) The owner or user of an out-of-state historical boiler shall provide a copy of the valid jurisdictional certificate of operation or permit to operate from another state.
SPS 341.92(2)(d)
(d) The owner or user of an out-of-state historical boiler shall arrange for an inspection after the certified inspector receives, reviews and accepts the documentation as required in
pars. (a) and
(b). Inspectors shall be given at least 5 business days advance notice to arrange for the inspection.
SPS 341.92(2)(e)
(e) Upon satisfactory inspection, the owner or user of the out-of-state historical boiler shall obtain a valid permit to operate and post the permit as required in
s. SPS 341.91 (3) prior to operation.
SPS 341.92 History
History: CR 05-025: cr.
Register October 2005 No. 598, eff. 11-1-05;
CR 08-028: r. and recr. (title) and (1), r. (2) and (3), renum. (4) to be (2) and am. (2) (a) and (e)
Register November 2008 No. 635, eff. 12-1-08; correction in (1) (a) 1. b., (c), (2) (b), (e) made under s.
13.92 (4) (b) 7., Stats.,
Register December 2011 No. 672;
CR 11-047: am. (title), (2) (a)
Register May 2012 No. 677, eff. 6-1-12.
SPS 341.93
SPS 341.93 Interruption of inspection cycle.
If an inspection cycle under NBIC part 2 section 6 S2.7.3.2 is interrupted by delaying a required inspection for more than 1 year, the subsequent inspection cycle shall restart from the beginning of the sequence in NBIC part 2 section 6 S2.7.3., which is the initial inspection under NBIC part 2 section 6 S2.7.3.1.
SPS 341.93 History
History: CR 11-047: cr.
Register May 2012 No. 677, eff. 6-1-12.
