... :API J55, API K55, API N80, API L80, API ... Oil casing pipe)Specification: 114.30-339.73*5.21- 12.19Standard ... : NUE, EUEEnd:Beveled, Square cut. And pipe protection cap specially for casing and tubingSurface:Corrosion proofing water based paintHeat treatment:Normalized, Quencher ...