Steel pipes have many different uses in manufacturing. Guardrails are one of the most common uses, providing safety features not only for stairs and balconies, but also for cyclists and pedestrians on the street. In addition., steel tubes can also be used as safety bollards to isolate vehicles and protect people, buildings or infrastructure. Third, steel pipe is also a choice for outdoor site decoration. Finally, many commercial bicycle frames are made of bent steel pipes. This has the advantage that steel's high toughness and strength make it resistant to thieves. Product name: steel pipe, structure steel pipe; Standard: ASTM, ASME and API; Grades: API 5L Gr. X42/X46/X52/X56/X60/X65/X70/X80and higher. PSL-1/PSL-2. ASTM A106 Gr. B/C. ASTM A53 Gr. B; Size: 1/2 inch to 12 inch, 14 inch, 16 inch, 18 inch, 20 inch, and 24 inch for seamless; Wall thickness: SCH 10, SCH 20, SCH 30, SCH 40, STD, XS, SCH 60, SCH 80, SCH 100, SCH120, SCH160, XXS; Length Range: 20 FT (6 meter), 40FT (12 meter)or customized; Ends Type: Beveled ends, Plain ends; End Protection: plastic Caps or iron Caps; Surface Coatings: Natural, Varnished, Black painting, 3PP, FBE and 3PE, Cladding and Lined etc.