... Corporation Piping Science Research Centre in conformity with the international standards such as CNPC SY/T-2007, NACE, ... petroleum development field, project of natural gas transmission from West to East China, Gas transmission from Shangxi province to Beijing . ... reputation,widely used-Russia, America,Australia, Germany, Mid East5.International standards-CNPC SY/T-2007, NACE,ANSI/AWWA6.Cooperation- ...