There are still some problems in China's valve industry
Mar 12,2015 丨 点击次数:3276
In petrochemical industry, the valve is widely used but has not caused enough attention of piping components.Lanzhou petrochemical major accidents recently, once again reminded us to attach importance to safety valve, screening and maintenance in time, to nip in the bud.And the procurement department, more should strengthen the understanding of the knowledge of valve, able to purchase the safety valve for use in petroleum and petrochemical industry.
The valve quality needs to be improved:
According to incomplete statistics, a total of more than about 6000 valve manufacturing enterprises in our country, such as Shanghai jian valve valve co., LTD., of which more than 5 million yuan output value of more than 900.Has "the land of China valve" in yongjia county, zhejiang province, the county only produce valves alone more than 300 kinds of more than 3000 specifications, widely used dry state-owned large enterprises and key engineering technology and equipment.Now, after years of development, our country's enterprises valve number in the world.
From the product, the valve industry in our country now can produce more than 10 categories of products, such as gate valve, globe valve, ball valve, butterfly valve, safety valve, check valve, throttle valve, plug valve, pressure reducing valve, diaphragm valve, steam trap, emergency shut-off valve, etc., the highest temperature reached 570 ℃, the lowest for - 196 ℃, the highest pressure of 600 mpa, the diameter of 5350 mm diameter.
With the rapid development of the valve industry, the industry generally believe that the valve has broad space for development in our country.And thanks to the support of national policy and valve products market strong demand.As countries to speed up the development of the equipment manufacturing industry policy gradually, general basic manufacturing development has been further key support.Especially several century project "west-east gas", "China" and "water" project construction needs a large number of products supporting.In addition, our country is faced with the advent of the era of industrialization, the petrochemical industry, power industry, metallurgical industry, chemical industry and urban construction using a large valve will increase the demand for valve products.Electric power industry, for example, during the period of "11th five-year plan" in coal unit for large and medium-sized projects valves forecast amounted to: valve total demand for 153000 tons, 30600 tons of annual demand the most;Valve total demand for 3.96 billion yuan, 792 million yuan is the annual demand.In addition, China is becoming the world's largest processing plants, processed products produced in greater space for development.
But some problems exist in valve industry is still in China, such as the major enterprises in China valve is given priority to with low level, small, cottage industry enterprises.On the products, due to the repeated investment, technology transfer enough, the leading enterprises in China valve products is still low-quality mass products.At present our country enterprise in the production of a variety of a common valve leakage, leakage, appearance quality is not high, short life, and not flexible operating valve electric device and pneumatic devices such unreliable shortcomings of some products is only equivalent to the international level of the early 1980 s, some high temperature and high pressure valves and key device need still rely on imports.In addition, China's valve industry in the industrial structure, the valve industry in the industrial chain, and industry specialization degree, there is a big gap with foreign enterprises.
By dry wandered the low-end valve products in our country, under the complex condition of nuclear power, petrochemical and other industries use the absence of high-end valve, lead to far ahead in terms of the valve in our country, but in terms of quality loss in foreign countries.According to the relevant departments to statistics, every year in China valve market turnover reached 50 billion yuan, of which more than 100 one hundred million yuan by foreign enterprises valve occupation of the market.The personage inside course of study says, the current valves on the market in our country, with the exception of low-pressure valve acceptable to the international market level, high pressure valve still needs a large number of imports.
Note: in the valve procurement
Given the important function of the valve in the production, for the valve procurement staff put forward higher requirements.In all kinds of chemical, petrochemical, oil, natural gas, pipeline material costs accounted for about 15% ~ 20% of the total project investment, and the valve accounted for 40% ~ 50% of material costs.So no matter from the use of perspective or from the economic point of view, the selection of the valve procurement, will inevitably be attaches great importance to the investment or the contractor.
It is known that chemical valve has four characteristics, namely: type, specification, type,Working conditions of complex and severe;Its complex structure, high technical requirements and manufacturing difficulties, therefore is called small devices;Position is important but it is the most vulnerable part of the plumbing.These characteristics make the design of the valve type selection, material selection and manufacturing are very difficult.Therefore, valve selection (including the type, material, form, etc.) if properly, the valve manufacturing quality fit and unfit quality, directly will affect the operation of equipment, and even endanger the factory and the life safety of the operator.According to expert introduction, when purchasing the valve to the general requirements, the valve standard quality, variable speed drive box, operating mechanism, internal and external anti-corrosion elements such as careful consideration.
