steel pipe ,1,Grade: S45C, S50C, GCr15 , ASTM4140,ASTM4130 2, SIZE: outer dia :less than 300mm, thick less than 30 mm STEEL TUBE65* ... is example , which we exportedWe are making the steel pipe all the time ,the detail information is as flw :1, ... hgh-quality tube , by virtue of the advanced imported equipment for piercing, repeated cold drawing ,straightening and other processess of production ...