CLASS B: Intended for use from surface to a depth of 6,000 ft (,830 m). Moderate to high sulphate resistance. Similar to ASTM Type II, and has a lower C3A content than Class A
CLASS C: Intended for use from surface to a depth of 6,000 ft (,830 m) when condition require early strength. Available in all three degrees of sulphate resistance, and is roughly equivalent to ASTM Type ll.
CLASS D: Intended for use from 6.000 ft (.830 m) to 10,000 ft (3,050 m) under conditions of moderately high temperatures and pressures.
CLASS F: Intended for use from 10,000 ft (3,050 m) to 16,000 ft (4,880 m) depth under conditions of extremely high temperatures and pressures. It is available in MsR and HsR types
CLASS G+ CLASS H: Intended for use as a basic well cement from surface to 8.000 ft (2,440 m) as manufactured, or can be used with accelerators and retarders to cover a wide range of well depths and temperature.