We can supply various kinds of   Petroleum Casing Pipe.Here I just list two kinds:

Oil casing pipes:
1) Nominal OD: 219.1 - 609.6mm (8 5/8" - 24")
2) Wall thickness: 6 - 19.1mm
3) Standard: API SPEC 5CT
Low pressure liquid pipe:
1) Nominal OD: 21.3 - 194mm (1/2" - 7 1/4")
2) Wall thickness: 2.5 - 8.18mm
3) Standard: ASTM, GB/T3091-2001