... 20" OCTG PIPE(Casing & Tubing ) API 5CT : Casing pipeStandardsAPI 5CT, API 5B Grade J-55, K-55, ... FinishP/STC/LTC/BTC UsageUsing for Petroleum and nature Gas exploration Tubing pipeStandardsAPI 5CT,API 5BGrade J-55, K ... -55, N-80, L-80, P-110 Size Range1.9"-41/2"End FinishP/NU/EUEUsageUsing for ... Petroleum and nature Gas exploration Tubing Pipe API 5CT