... 50mm; 3. Length: 3-12m 4. Standard: ASTM, AP Carbon Seamless Steel pipeSpecifications 1.Out diameter: ... GBBS standard5. Main Material:(Carbon Steel & Low Alloy steel)ASTM A53, A106, A210, A252, A333 etc; X42, X46, ... requirements8. Surface treatment:Bare pipe, Painted, Oiled, Galvanized, 3PE,FBE,Epoxy Coating 9. Usage:Widely used ... products,Competitive price, And Quick delivery ! ASTM A53 seamless pipe