At present, relevant departments have not officially released China's crude steel production in 2010. However, in mid-December of last year, the Ministry of Industry and Information Technology predicts that China's crude steel production will reach 620 million tons last year.
Luo Bingsheng, executive vice president of the China Iron and Steel Association, believes that China is a well-deserved steel country. During the "Twelfth Five-Year Plan" period, we must speed up the structural adjustment of the entire industry so that China will soon transform from a big steel country to a strong steel country.
During the “Eleventh Five-Year Plan†period, China’s iron and steel industry eliminated the backward production capacity steadily. A total of 116.96 million tons of outdated iron production capacity and 69.14 million tons of steel production capacity were eliminated, completing 117% and 126% of the planned phase-out.
There are five general body styles of ball Valves: single body, three-piece body, split body, top entry, and welded. The difference is based on how the pieces of the valve-especially the casing that contains the ball itself-are manufactured and assembled. The valve operation is the same in each case.
In addition, there are different styles related to the bore of the ball mechanism itself.
Ball valves in sizes up to 2 inch generally come in single piece, two or three piece designs. One piece ball valves are almost always reduced bore, are relatively inexpensive and generally are throw-away. Two piece ball valves are generally slightly reduced (or standard) bore, they can be either throw-away or repairable. The 3 piece design allows for the center part of the valve containing the ball, stem & seats to be easily removed from the pipeline. This facilitates efficient cleaning of deposited sediments, replacement of seats and gland packings, polishing out of small scratches on the ball, all this without removing the pipes from the valve body. The design concept of a three piece valve is for it to be repairable.
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