Statutes, codes, and regulations
South Dakota Administrative Rules
Title 61 - Department of Public SafetyArticle 61:08 - Boilers
Chapter 61:08:05 - Safety requirements
Section 61:08:05:17 - Computation of maximum allowable working pressure - Nonstandard boilers

S.D. Admin. R. 61:08:05:17

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Current through Register Vol. 51, page 67, December 16, 2024
Section 61:08:05:17 - Computation of maximum allowable working pressure - Nonstandard boilers

Nonstandard boilers with welded seams may not be operated at pressures exceeding 15 psig for steam or 30 psig for water. The maximum allowable working pressure for nonstandard boilers with other than welded seams shall be computed according to the following formula:

(1) The maximum allowable working pressure for nonstandard boilers is a function of the strength of the weakest section of the structure. This strength shall be computed by multiplying the ultimate tensile strength of shell plate, psig, by the minimum thickness of the weakest course of shell plate, in inches. This sum is then multiplied by the efficiency of the longitudinal joint as specified by subdivision (2) of this section. The result of this calculation is then divided by the product of the inside radius of the weakest course of the shell or drum, in inches, multiplied by the factor of safety permitted by § 61:08:05:17.04. The final result of this calculation indicates the maximum allowable working pressure in psig.
(2) When stated symbolically this formula shall read:

TStE=maximum allowable working pressure, psig

RFS

where:

TS=ultimate tensile strength of shell plates, psig.

t=minimum thickness of shell plate, in weakest course, in inches.

E = efficiency of longitudinal joint:

For tube ligaments, E shall be determined by the rules given in Section I of the ASME code.

For riveted construction refer to Part PR of the American Society of Mechanical Engineers Boiler and Pressure Vessel Code, 2001 Edition of Section I.

For seamless construction, E is considered 100 percent.

R=inside radius of the weakest course of the shell, in inches.

FS=factor of safety permitted.

S.D. Admin. R. 61:08:05:17

SL 1975, ch 16, §1; 8 SDR 87, 8 SDR 134, effective 7/1/1982; 12 SDR 151, 12 SDR 155, effective 7/1/1986; 30 SDR 48, effective 10/16/2003; 50 SDR 047, effective 10/16/2023

General Authority: SDCL 34-29A-16.

Law Implemented: SDCL 34-29A-16, 34-29A-22, 34-29A-24.

American Society of Mechanical Engineers Boiler and Pressure Vessel Code, 2021 Edition of Section IV and IX; Copies may be obtained from the American Society of Mechanical Engineers, Two Park Avenue, New York, NY 10016. Section IV, $517; Section IX, $588.