What Is The Difference Between ASTM A269 And A270?

ASTM A269
The ASTM A269 standard applies to seamless and welded stainless steel and nickel alloy pipes, mainly used for general-purpose piping systems, heat exchangers, condensers, boilers, turbines and other industrial applications. The standard covers a variety of materials, including 304, 304L, 316, 316L and other stainless steel types.
ASTM A270
The ASTM A270 standard applies to small-diameter stainless steel seamless and welded pipes, mainly used for piping systems in sanitary equipment and food processing equipment. This standard has higher requirements for material purity and sanitary conditions, and is often used in occasions that require high sanitary standards, such as drinking water systems, pharmaceutical equipment, etc.

GNEE has an annual production line of 25,000 tons of stainless steel seamless pipes, 20,000 tons of welded pipes, and 5,000 tons of pipe fittings. It can produce φ6～φ762×0.5～70mm stainless steel seamless pipes, φ15～φ2200×0.5～80mm stainless steel welded pipes, pipe fittings and other products according to GB, ASTM, JIS, DIN and other standards.
The main brands are TP321, TP316Ti, S32205, TP347H, TP316L, TP310S, TP304, TP304L, 321, S32750, 904L, C276, 254SMO, etc.
In terms of testing, the company is also equipped with advanced testing equipment, established a physical and chemical center, online and offline automatic eddy current flaw detection, water pressure test, underwater air tightness test, salt spray tester, universal tensile testing machine, hardness tester, CS analyzer, metallographic microscope, portable direct reading spectrometer, roughness detector, intergranular corrosion device, etc.