1 good quality 2 best service 3 reasonable price 4 various styles Liaocheng TIANTUO Steel co.,ltd ,seamless steel pipes and stainless steel ... .8-111, DIN 17175, GB8163-2008, GB9948-2006, GB8162-20082. Carbon Material:20#, 35#,45#,CK45,ST45,ST55,SA106B3. Alloy Material ... edge protecter,steel hoop,or as per customer's requirement Best quality Q235 carbon steel pipe Oil gas