... 2 best service 3 reasonable price 4 various styles Liaocheng TIANTUO Steel co.,ltd ,seamless steel pipes and ... natural gas, gas, water and some solid materials, pipes, etc., lighter, is an economic cross-section steel, ... 17175, GB8163-2008, GB9948-2006, GB8162-20082. Carbon Material:20#, 35#,45#,CK45,ST45,ST55,SA106B3. ... or as per customer's requirement Best quality Q235 carbon steel pipe Oil gas