... Standard:ASTMMaterial:304,304L,316,316LPlace of Origin: HeBei China(Mainland)Packaging: standard packing suitable for exporting by sea Applications Range ... esp in large diameter .The surface and inside can be zinc coated and 3PE layer. Also support third party inspection, ... on .So please EMAIL ME your specific enquiry, such as material, out diameter, wall thickness, length, quantity,, and our quotation ...