1.API 5CT 2.TPCO material 3.Material:H40,J55,K55,N80,M65,L80,C90,T95,P110 4.Casing coupling and pup joint ... manufactured according to API 5CT and API 5B. Our oil casing includes seamless casing and ERW casing.OD: 114.3mm –508mmStandard: API SPEC 5CT & API SPEC 5BLength ... : R1/R2/R3Material: H40,J55,K55,N80,M65,L80,C90,T95,P110.Specialty: L80 9Cr, 13Cr Casing ...