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API Spec 5L is an international standard that specifies the manufacturing requirements for two product specification grades (PSL 1 and PSL 2) of seamless and welded steel pipes used in pipeline transportation systems in the oil and gas industry.
A192 Seamless Carbon Steel Pipe
ASTM A192 is the same as ASME SA-192 and is the standard specification covering seamless carbon steel boiler and superheater tubes of minimum wall thickness for high pressure service.
304 stainless steel is a kind of universal stainless steel material, rust resistance than 200 series of stainless steel material is stronger. High temperature resistance is also better, can be as high as 1000-1200 degrees. 304 stainless steel has excellent corrosion resistance and good intergranular corrosion resistance. For oxidizing acids, it is concluded in the experiment that 304 stainless steel has strong corrosion resistance in nitric acid with a concentration of less than or equal to 65% of the boiling temperature. It also has good corrosion resistance to alkali solution and most organic and inorganic acids.
Grade 316 stainless steel is an austenitic form of stainless steel with a molybdenum content of 2-3%. The addition of molybdenum makes the metal more resistant to pitting and corrosion and improves its resistance to exposure to high temperatures. This grade of stainless steel is particularly effective when used in acidic environments. With this metal, corrosion caused by acetic acid, hydrochloric acid and other forms of acid can be prevented.
316L stainless steel is an austenitic stainless steel metal alloy that contains nickel and molybdenum, making it corrosion resistant. 316L is a 316 low carbon grade. This grade is not affected by sensitization (grain boundary carbide precipitation). It is often used for large-gauge welded parts (approximately over 6mm). 316L stainless steel has higher creep, fracture stress and tensile strength than chromium nickel austenitic stainless steel at high temperature.
Grade 904L is an unstable low carbon high alloy austenitic stainless steel. The addition of copper to this grade greatly increases its resistance to strong reducing acids, especially sulfuric acid. It is also highly resistant to chloride attack, including pitting/crevice corrosion and stress corrosion cracking.
2507 Duplex Stainless Steel Pipe
2507(UNS S32750) is an ultra-duplex stainless steel containing 25% chromium, 4% molybdenum and 7% nickel. It is designed for demanding applications that require excellent strength and corrosion resistance, such as chemical processes, petrochemicals and seawater equipment. The steel has excellent resistance to chloride stress corrosion cracking, high thermal conductivity and low coefficient of thermal expansion. High chromium, molybdenum and nickel levels provide excellent resistance to pitting, crevice corrosion and general corrosion.
310S is an austenitic stainless steel that combines excellent high temperature performance with good ductility and weldability. It is usually used for high temperature applications because its high chromium and nickel content provides solid corrosion resistance, excellent oxidation resistance and excellent strength at temperatures up to 2100 °F. Due to its high chromium and nickel content, it is superior to 304 or 309 stainless steel in most environments.