1.API 5CT N80 oil casing pipe 2 ... P110 etc. 4.Thread:LTC,STC,BTC · API 5CT N80 oil casing pipe 1. Size:OD:6 ... ,K55,L80,P110,C75,C95 etc.3. Standard:API 5CT & 5B4. thread type:STC,BTC,LTC5. brand ... ,Baotou Steel , Anshan Steel etc. standard: API SPEC 5CTTubing and CasingApplicationTubing is used to extracting ... )hardness a Maxmm HRCMinMaxMinHRCHBVJ55379552517----N80552758689---- API 5CT N80 oil casing pipe