The NACE standard (now redesignated as provides guidelines for the design and selection of materials used in the handling and storage of commercial concentrated sulfuric acid (90 to 100% at ambient temperatures ANSI Webstore Key Technical Details : Specifically covers sulfuric acid concentrations between 90% and 100% by mass at "ambient" temperatures up to 50°C (122°F)
The standard does not simply list products; it outlines performance criteria. It discusses the importance of: nace rp 0391 pdf
A critical note for buyers: NACE merged with SSPC to form AMPP (Association for Materials Protection and Performance). The document you are looking for is now officially AMPP SP0391 (formerly NACE RP0391). The NACE standard (now redesignated as provides guidelines
The standard confirms that carbon steel is the primary material for tanks, piping, and fittings for concentrated $H_2SO_4$, provided the acid concentration remains above 90% and velocity is controlled. The document you are looking for is now