... ,P9DIN:T5,DIN17175/79,T9Q235, Q345, API K55, API L80, API N80TechniqueHot Rolled and Cold DrowingSurface treatmentTransparent oil ... , GB, DIN, ASTM, APIApplication Natural gas, petroleum, chemical industry, electric power, metallurgy thermodynamic fields, water supply engineering ... and long pipeline transportation projects.CertificateISO 9001:2000 API 5L/5CT LIoydsPacking6 steel strip ,bundles ,caps ...