... mechanical parts, such as oil drill pipe, automobile drive shaft, bicycle stand, as well as construction using steel scaffolding. Steel Pipe ... .8-111, DIN 17175, GB8163-2008, GB9948-2006, GB8162-20082. Carbon Material:20#, 35#,45#,CK45,ST45,ST55,SA106B3. Alloy Material ... hoop,or as per customer's requirement Best quality Q235 carbon steel pipe Oil gas