Gas pipeline Central Asia – China
Gas pipeline Central Asia – China is one of the most interesting investments of the VBW Engineering company. This is an international project of huge strategic importance for the economies of many countries. The investment, also called the Turkmenistan-China gas pipeline, is a system of gas pipelines leading from Central Asia to Xinjiang in China. By connecting Turkmenistan to China's national network, the investment enables the transport of gas from Turkmenistan to Shanghai.
The “Construction of the main Kazakhstan-China gas pipeline” project is the first project in the gas sector of the Republic of Kazakhstan which aims at developing the transit potential of this country, as well as the diversification of its natural gas supplies. In June 2003, during a visit of the President of China, Hu Jintao to Kazakhstan, an agreement was signed to accelerate the evaluation of the project.
According to this agreement, KazMunayGas and PetroChina have started a feasibility study on the pipeline project. At the same time, China continued negotiations with other countries of Central Asia.
On April 3, 2006, China and Turkmenistan signed a framework agreement on the construction of pipelines and long-term gas supplies. In June 2007, during a visit to China, President of Turkmenistan Gurbanguly Berdimuhamedov signed an agreement on accelerating the implementation of the Turkmenistan-China gas pipeline project. In July 2007, Turkmenistan joined the original Kazakhstan-China pipeline project, and a month later, the “On cooperation in the construction and operation of the Kazakhstan-China pipeline” contract was signed between the governments of Kazakhstan and China. On August 30, 2007, construction of the Turkmen section of the 188 km long pipeline began.
In June and July 2007, construction of the Uzbek and Kazakh gas pipeline began, and a month later, works started in Turkmenistan. The main “Kazakhstan-China” gas pipeline is part of the cross-border “Turkmenistan-Uzbekistan-Kazakhstan-China” gas pipeline, with a total length of over 7.5 thousand kilometres, including 188 km in Turkmen territory, 525 km in Uzbekistani territory, 1.3 thousand km in Kazakh territory and 4.8 thousand km in Chinese territory. The gas pipeline starts from the city Gedaym, passes through the Republic of Uzbekistan and the Republic of Kazakhstan, and ends at the Horgos SUAR Chinese border point. The project capacity of the gas pipeline is 40 billion cubic meters of gas transmitted annually.
12 BS sectional air-conditioning units with an automation system in a special explosion-proof EX version with a total capacity of 184,800 m3/h, were an element of identical supplies for four twin facilities in the cities of Shu, Shardara, Taraz and Almaty (Kazakhstan). For our constructors, developing designs for air-conditioning units and automation systems that serve these facilities, the main issue was to ensure the total safety of use of our products, intended for work in potentially explosive areas.
The control panels are located at gas pumping stations along the gas pipeline route and serve their daily servicing. These locations are directly related to the exposure of the facility, and the air-conditioning installation to very high dustiness, extremely high air temperature outside during the day, and a significant drop at night. Such conditions decide, among others ,the selection of control panels of very high efficiency, combined with a special filtration system.
The basic condition which must met by the equipment provided by us is to ensure not only the safety of their everyday use, but also their appropriate protection in the case of system failure. The air conditioning control panels of VBW Engineering were designed in such a way that in the case of a flammable gas leak, they do not become a source of fire, and they act as a firewall, preventing the further spread of fire and smoke through the ventilation system.
The automation system designed for installation in potentially explosive atmospheres according to the ATEX directive deserves special attention. To ensure the explosion safety of devices, the automation systems of air-conditioning control panels contain several functional and construction elements in a special version of EX. This allows, in accordance to the design requirements, the automation cabinets to be mounted directly in the EX zone without a threat of explosion.For VBW Engineering, the opportunity to participate in an international project with such specific requirements is a very interesting experience and confirmation of the effectiveness of current technological solutions.