Non-ferrous metal pipes contain no iron. They offer high corrosion resistance, thermal conductivity, and light weight. Common materials include copper, aluminum, brass, and nickel alloys. Specifications are set by standards like ASTM, ASME, and IS. [1, 2, 3, 4, 5] Common Material Specifications • Copper Pipes: Covered under ASTM B42 (seamless copper pipe), ASTM B88 (seamless copper water tube), and ASTM B75. Used for plumbing and gas lines. • Copper-Alloy / Brass Pipes: Governed by ASTM B43 (seamless red brass pipe) and ASTM B111 (condenser and heat exchanger tubes). • Copper-Nickel Pipes: Specified by ASTM B466 (seamless) and ASTM B467 (welded) for marine and seawater systems. • Aluminum Pipes: Standardized under ASTM B241 (seamless aluminum alloy pipe) and ASTM B491 (extruded round tubes) for structural and fluid transport. • Nickel and Nickel-Alloy Pipes: Governed by ASTM B165 (Nickel-Copper alloy), ASTM B167 (Nickel-Chromium alloy), and ASTM B514 (welded nickel-iron-chromium) for high-temperature and chemical uses. [1, 2, 5, 11] Key Selection Factors • Dimensions: Often designated by Outer Diameter (OD) and wall thickness or standard pipe size (NPS). • Temper / Hardness: Available in soft (annealed), half-hard, or hard conditions depending on bending and pressure needs. • Testing: Require material test certificates (such as EN 10204 3.1) to verify chemical composition. [12, 13, 14, 15] If you tell me the specific metal (copper, aluminum, brass, or nickel) and the intended application (plumbing, marine, or chemical), I can give you the exact standard and pressure ratings.