Casing conform to latest version of API Specification 5CT, API Specification 5B and other related standards. Casings are available in standard API configurations with all sizes from 5 to 13 3/8 in grade H40, J55, N80, L80, C90, P110 and Q125.Technical CharacteristicsHigh thread bonding strength with good anti-thread gluing ability.The steel yield strength is bigger than API standard.Big OD size, ...