... products. My company is founded in 2006 large seamless steel tube manufacturer: Shandong Zhongli Steel Pipe Manufacturing Co., LTD. The company ... XXS (4) Standard :ASTM A106-B ASTM A53-B API 5L-BAPI 5L, X42, X52, and 5CT ,J55 ,K55SAE1020 ,SAE1045 JIS ... or for the clients’ needs(8) Application field:Transportation of oil,gas or fluid,Construction,Electricity,Machine building industy,Chemical industy, ...