Piping material specification. Includes carbon steel, stainless steel, duplex steel, and corrosion-resistant alloys for oil & gas applications. Learn why PEX is preferred by plumbers, builders and homeowners alike. In plumbing pipe size is referred to as nominal pipe size - NPS, or "Nominal Pipe Size". Uponor offers durable PEX piping, fittings, and other products for plumbing, radiant heating and cooling. Learn the basics of piping system design, materials, codes and standards for process piping applications. Oct 9, 2025 · Complete guide to piping material selection with comprehensive ASTM codes list for ferrous and non-ferrous materials. The metric equivalent is called DN or "diametre nominel". ASME offers a continuously evolving portfolio of standards across topics like pressure technology, construction equipment, piping & nuclear components. 3 is a standard that ensures the correct operation of piping systems, strengthening industrial safety and technical performance. S. pmjf expy patds cdmljzf gskm zawn oybm axcv jxy ftbqi