Stainless steel pipes are widely used in various industries due to their corrosion resistance, durability, and versatility. Among the common materials used for stainless steel pipes, several grades stand out, each with unique properties suitable for different applications. These include 201 (1Cr17Mn6Ni5N), 202 (1Cr18Mn8Ni5N), 301 (1Cr17Ni7), 302 (1Cr18Ni), 304 (0Cr18Ni9), commonly known as SS304 or TP304, and its low-carbon variant 304L (00Cr19Ni10), also referred to as SS304L or TP304L.
Other popular grades include 321 (1Cr18Ni9Ti), often called SS321 or TP321, which is ideal for high-temperature applications. For enhanced corrosion resistance, 316 (0Cr17Ni12Mo2) and its low-carbon version 316L (0Cr17Ni14Mo2) are frequently used, also known as SS316 and TP316L. Additionally, 310S (0Cr25Ni20) is a high-temperature alloy with excellent oxidation resistance, commonly used in furnace and heat exchanger systems.
In terms of standards, stainless steel seamless pipes are governed by a variety of national and international specifications. These include GB2270-80 for general use, GB/T14976-94 for fluid transportation, and GB/T14975-94 for structural applications. Other standards such as GB13296-91 for boiler and heat exchanger pipes, as well as aviation-related standards like GJB2608-96, YB676-73, and others, ensure the quality and performance of these materials in specialized environments.
Additionally, ASTM standards such as A213 for boiler and heat exchanger tubes, A269 for general-purpose austenitic pipes, and A312 for austenitic stainless steel tubes are widely recognized. JIS standards like G3456-88 for mechanical structures and G3463-88 for boiler and heat exchanger applications also play a key role in global manufacturing.
For chemical and industrial uses, standards like Q/HYAD101-91 and Q/HYAD103-91 specify the requirements for seamless steel pipes, including 0Cr18Ni11T and 00Cr18Ni5MO3Si2 duplex stainless steel. These materials are essential in environments where both strength and corrosion resistance are critical.
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