What is astm a790 ?
The American Society for Testing and Materials, popularly known as ASTM, is an international standard for pipes and fittings. ASTM A790 is a standard specification for seamless and welded austenitic or ferritic stainless steel pipes. The specification for supply defines the composition and requirements for mechanical properties for seamless and welded steel pipes. The ASTM A790M welded pipe are made using the automatic welding process, without the use of any filler metal in the welding operations. Due to the good mechanical properties of the ASTM A790 Seamless and Welded Ferritic/Austenitic Stainless Steel Pipes, they are used in a wide range of applications in industries like oil and gas refining, pulp and paper manufacturing, chemical process plant, pollution control equipment, etc.
This is a specification for duplex steel which is a mixture of various elements, like chromium molybdenum and nitrogen which gives the material its properties. It shows good strength and corrosion resisting properties compared to other duplex steel types in the mid-range. These pipes get additional strength through their manufacturing procedure. The welded variants of these pipes are hot rolled while the seamless variants are cold drawn. They can be further strengthened to a limit through the cold working process. These pipes are ideally used in applications that include mild high temperature and pressure, and mildly corrosive environment. This is why these pipes are often seen in waste water management systems and water purification with high precision. They are not only used in industrial services but also in low cost domestic applications.