The large diameter cold drawn seamless steel pipe is a steel pipe with an outer diameter of more than 1000mm. The large diameter seamless steel pipe is made of steel ingot or solid billet through perforation and then hot rolling, cold rolling or cold drawing. If they are long, they need to remove the redundant parts, that is, cut them out. Their length api 5l X70 psl1 is suitable for the length required by the construction of steel pipes.
The company has a group of experienced steel plate continuous processing line construction, production management, operation and professional and technical personnel. The company is a modern enterprise integrating scientific research and development, production processing, sales and service. Our main products include hot rolled plates, seamless pipes, api 5l X70 psl1 and steel structures. At the same time, it also adheres to international standards and adheres to the international line.
Quenching Improve the hardness of api 5l X70 psl1 steel, Annealing is refine the grain size, homogenization, reduce hardness, improve the plasticity and eliminate interna stress. Normalizing refine grain , improve the impact toughness of api 5l X70 psl1 steel and comprehensive mechanical properties.
The early api 5l X70 psl1, pipeline steel has been using C, Mn, Si type ordinary carbon steel, which focused on performance in metallurgy and did not have strict regulations on chemical composition. Since 1960, with the increase of pressure and diameter of oil and gas pipelines, low alloy high strength steel (HSLA) has been adopted, mainly supplied in hot-rolled and normalized conditions.Delivery status of api 5l X70 psl1, API 5L X70 pipeline steel: mainly supplied in hot rolling or normalizing state.
