ISLAMABAD - Oil and Gas Regulatory Authority (Ogra), in a bid to control the growing accidents of CNG cylinders blasts, has now black listed foreign companies remained involve in providing CNG storage and vehicle cylinders in the country so far. Sources privy to the development have informed TheNation that Ogra has black listed 12 companies providing CNG storage cylinder and six companies providing CNG vehicle cylinder in the country as they ironically do not have Cylinder Testing Certificate of international standards. It was learnt that the companies which remained providing CNG storage cylinder named as Chongching, Tailor Wharten, MESCO, N.K Corporation, Vintec, IGVI, BTC, Kioshi and UEF while those companies that remained involve in providing CNG vehicle cylinder named under Inflex, EKC UEA, EKC India, BTIC, Cilbrass and Dalmine are included in the list of black listed companies. These companies were advised to obtain test certificate from the Canadian Power Tech Laboratory. Sources further informed that Ogra would delete their names from the black listed companies if Canadian Power Tech Laboratory award them required certificate on their cylinders qualifying international standards. Sources further informed that this strict measure of the Ogra is to control the growing accidents of cylinder blasts in the country. Companies belonging to the countries America, Britain, China, Brazil, India, Argentine, UAE, Korea and Italy. A large number of cylinders made by these companies have been installed in various vehicles in the country. Ogra has also sent the names of these black listed companies to the Federal Board of Revenue(FBR) and customs officials in a bid to ensure that these companies could not import cylinder from the foreign countries.