CHENNAI, India, May 17 (Reuters) - The Middle East crude market weakened on Friday after Qatar sold July al-Shaheen via tender at slightly lower premiums than last month, underscoring the bearish sentiment as a result of still-weak margins.                     *TENDERS         - Qatar International Petroleum Marketing Co, or Tasweeq, sold seven 600,000-barrel cargoes of al-Shaheen crude for July at $1.1-$1.2 per barrel over Dubai quotes, trading sources said. June cargoes were sold at $1.00-$1.50 a barrel above Dubai, with most of the cargoes traded at premiums between $1.20 and $1.30.      Japanese refiner TonenGeneral Sekiyu, India's Reliance Industries Ltd, and Thailand's PTT were among the buyers, the sources said.          *TRADES:     - July Murban may have changed hands at 15 cents below its official selling price, traders said. The seller may have been  Exxon, they added.      - In the cash market, Royal Dutch Shell bought three of the four July Dubai partials traded, two from Vitol and one from Phibro, according to data collated from traders. Phibro also sold one partial to Mercuria. The traded price of the partials ranged between $100.80-$100.90 per barrel.                     *MARKET NEWS     - Militants blew up part of a pipeline carrying crude from Iraq's Kirkuk to Turkey's Mediterranean port of Ceyhan early on Friday, halting the oil flows for the third time since an attack May 6, sources at Iraq's North Oil Company said.  
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       - China National Chemical Corp (ChemChina) has bought 4 million barrels of crude oil for delivery this month, sources said, as the state-run refiner and nascent crude oil importer speeds up shipments to fully utilize a hard-won import quota.  
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       - Japan's utilities consumed 4.2 percent less natural gas last month than a year earlier, as power saving measures helped reduce generation for the fourth month in a row, an industry body said on Friday.  
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            CRUDE ($/bbl)                        Price     Prev     Change  JUL DME Oman diff to Dubai swap         0.76     0.93    -0.17  JUL Brent   
  BRENTSGMc1
                 103.76   102.91    +0.85  JUL Dubai  
  DUBSGSWMc2
                  100.16    99.27    +0.89  JUL DME Oman                          100.92   100.20    +0.72  JUN Brent/Dubai EFS  
  DUB-EFS-1M
          3.60     3.64    -0.04                                                            PRODUCT CRACKS                                            JUN fuel oil crack  
  FO180SGCKMc1
       -6.83     -6.57    -0.26  JUN gasoil crack  
  GOSGCKMc1
            16.78     15.93    +0.85  JUL naphtha crack  
  NAFOBSGCKMc1
        -9.12     -9.55    +0.43                                                            COMPLEX REFINERY MARGINS  
  REF/MARGIN1
                      Today                                   5.12              Last 5 days                             6.14              Last 365 days                           7.43                       (Reporting by Ramya Venugopal, editing by William Hardy)  ((ramya.venugopal@thomsonreuters.com)(+91 80562 88685)(Reuters Messaging: ramya.venugopal@thomsonreuters.com.reuters.net))  
 ((RECENT CRUDE OIL TRADES           Asia... 
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                                CRUDE OIL MARKET NEWS           Crude oil tenders in Asia................... 
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             Global arbitrage news and flows................. 
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                             REFINERY MAINTENANCE DIARIES           Asia... 
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                                NATIONAL CRUDE IMPORT DATA           Japan.............. 
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             All Asian crude oil  differentials................ 
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             All Asian crude oil outright  prices.................. 
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      ))
  Keywords: MARKETS MIDEAST CRUDE/