Casing steel pipe 7" BTC J55 23ppf Range3 API 5CT

Casing steel pipe 7" BTC J55 23ppf Range3 API 5CT Standard:API 5CT Grade:J55,K55,N80,L80,P110,Q125 Material:seamless casing steel pipe(ERW is also ok) Threaded:BTC,LTC,STC Couplings with PIN and BOX Outer diameter:4 1/2"-20" (114.3mm-508mm) Wall thickness:5.21mm-16.13mm Lb/Ft:9.5-40.5 Length:Range1(4.88-7.62m) Range2(7.63-10.35m) Range3.(10.36-14.63m) but in fact the range length is 10.36-11.9m,also in fact this kind is used commonly. Certification:API 5CT,MTC (Material test