... .Summury products as follows: Standard specificationStandard No.Normal Steel GradeCasing and TubingAPI 5CTJ55, N80, P110, L80, C90, T95Line pipeAPI 5LA ... specification forHot-Formed Welded andSeamless Carbon SteelStructural Tubing in Rounds and Shapes ASTM A500A, B, C, DStandard specification forHot-Formed ... , STPT480Seamless precision steel tubesDIN 17175St30Si, St30Ai, St35, St45, St52 casing pipe