There is no technical reason to require this for stationary containers serving stationary engines. Larger 312 psig ASME containers will have to be custom designed and manufactured at a significantly higher cost and with a lengthy lead time. The problem is ASME containers with a design pressure of 312 psig are currently produced in sizes up to 110 gallons.
In practice such stationary engine fuel containers exist in the same environment as propane containers providing fuel to residential heating and cooking. This environment does not exist for ASME propane containers serving stationary engines (such as emergency generators), and the normal MAWP of 250 psig is adequate. It is the intent of the LP-Gas committee to require vehicle engine fuel containers to have a MAWP of 312 psig due to the possibility of overpressure and propane release due to heat accumulated from the engine or the vehicle’s operation. This requires all ASME propane containers to have a maximum allowable working pressure (MAWP) of 312 psig, if constructed after Ap(per 11.3.2.1). Additional Proposed Changes File Name Description Approved Proposed_TIA_1079_58_.docx Balloted TIA Statement of Problem and Substantiation for Public Input The addition of new subsection 11.15.2 placed requirements for containers providing propane engine fuel for stationary engines. 11.15.2.3 6.26.3 Where containers for stationary engines have a fill valve with an integral manual shutoff valve, the minimum separation distances shall be one-half of the distances specified in Section 6.3. 11.15.2.2 6.26.2 Containers for stationary engines shall be installed to meet the separation requirements of Section 6.3. 11.15.2.1 6.26.1 LP-Gas containers for stationary installations shall be located outside of buildings unless the buildings comply with the requirements of Chapter 10. 11.15.2 6.26 Containers for Stationary Engines. A.11.1.1 Chapter 11 covers engine fuel systems for engines installed on vehicles for any purpose, as well as fuel systems for stationary and portable engines. 11.1.1* This chapter applies to engine fuel systems on vehicles using LP-Gas in internal combustion engines, including containers, container appurtenances, carburetion equipment, piping, hose and fittings, and their installation. needs to be reconsidered by the Technical Committee for the next edition of the Document. 1-NFPA 58-2013 NOTE: This public input originates from Tentative Interim Amendment 58-14-1 (TIA 1079) issued by the Standards Council on Augand per the NFPA Regs.
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