By Matthew Miller and Fang Yan BEIJING, Feb 18 (Reuters) - CSC Nanjing Tanker Corp 600087.SS is poised to become the first company backed by China's central government to delist from a domestic stock market after it breaches exchange rules and reports its fourth consecutive year of losses. The expected delisting of Nanjing Tanker, the oil and bulk chemicals marine freight subsidiary of state-owned Sinotrans & CSC Holdings Co Ltd SASACG.UL , is a rare event that underscores the difficulties facing Chinese companies facing record high debt and slowing economic growth. These problems are worse for sectors struggling with overcapacity. China's State Council has said the government would block new approvals in five industries affected by chronic oversupply, including shipbuilding. ID:nL3N0I51HT "We'll be delisted according to securities markets rules if the audited annual results show a loss," Ding Wenjin, a Nanjing Tanker board member, told Reuters. The company, listed on the Shanghai stock exchange, is due to report 2013 earnings in April. Nanjing Tanker said last month it expected to report a net loss of 1.27 billion yuan ($209.34 million) for 2013, after the Jiangsu-based company said net losses reached 1.24 billion yuan a year earlier. It shares have not traded since May. Nanjing Tanker reported 12.45 billion yuan ($2.05 billion) in total debt at the end of September, with debt outpacing equity more than four times, according to exchange filings. Analysts said most government-controlled enterprises were willing to help their subsidiaries stay afloat, but cautioned that most of these units were in better financial shape than Nanjing. In the past month, state-backed firms Angang Steel 000898.SZ 0347.HK and China Cosco Holdings 601919.SS 1919.HK have said they expect to see a profit in 2013 for the first time in three years, largely due to one-time cash injections from asset sales. ID:nL3N0KQ3CO "The big state-owned enterprises can take measures to turn red into black, and the government also will try to help them" said Cao Xuefeng, head of research at Huaxia Securities Co. in Chengdu. "There's a lot of room." SAVING SUBSIDIARIES Nanjing's parent firm Sinotrans & CSC Holdings is one of the key state-owned enterprises operating under the direct administration of the State Council's State-owned Assets Supervision and Administration Commission. It reported group turnover of 106.7 billion yuan ($17.60 billion) and assets of 122.9 billion yuan in 2012. The group holds five listed companies, including Sinotrans Ltd 0598.HK , a shipping, warehouse, and railways company as well as Sinotrans Shipping Ltd 0368.HK . Another subsidiary, Changjiang Shipping Group Phoenix Co 000520.SZ , has also reported three consecutive years of losses but may be spared delisting as it is holding bankruptcy restructuring talks with creditors, Sinotrans spokesman Xu Jiandong told Reuters. The dry bulk goods shipper has been sued for loan repayment by five banks, including China Merchants Bank Co. 6000036.SS and China Minsheng Banking Corp 600016.SS . It also faces lawsuits by the leasing arm of the Industrial and Commercial Bank of China 601398.SS and China Petroleum and Chemical Corp 600028.SS for unpaid bills. ($1 = 6.0641 Chinese yuan) (Additional reporting by Clement Tan in Hong Kong; Editing by Miral Fahmy) ((matthew.miller1@thomsonreuters.com)) Keywords: NANJINGTANKER DELIST/