In the petroleum, chemical industry, metallurgy and energy industry, the valve is one of the widely used fluid control equipment. As an important part of the pipeline system, the specifications of the Industrial Valves and a lot of more phyletic, the effect is also different. Some used to connect or truncated medium, adjust the medium pressure or flow rate, prevent the medium pressure in excess of the prescribed, insures the safe running of the pipe or equipment. Also some to separation, mixing or distribution medium, so as to guarantee the system process conditions. Due to the role of the Industrial Valves in the pipeline system, the valve manufacturing process will directly affect the safe operation of the pipeline equipment. So, 'pressure piping components manufacturing safety measures for the registration and management regulation, valve manufacturing unit should accept safety registration, only has the safety registration manufacturing unit production valve can only be used for pressure piping. With the continuous development of demand conditions, demand for valve performance is becoming more and more high, products related to the process of the manufacturing process is becoming more and more attention. Due to valves and piping components related to the technical specification is not complete, such as welding, corrosion resistant surfacing of valves and wear-resistant overlaying welding such as no clear rules. And the particularity of the valve, if you can use the boiler pressure vessel pressure pipe manufacturing specifications remains to be discussed, all of which bring some difficulties in Industrial Valves safety registration review. The analysis in this paper, the related problems, and suggests that in setting a new standard can according to the actual need to increase the corresponding content, so that the technical specification more comprehensive and easy to operate. Large body of the valve are generally used in manufacturing welding form, and the body wall thickness is often greater than 38 mm. According to the related regulation of pressure vessel pressure pipes at home and abroad, when the weldment thickness is more than 38 mm, need to heat aging treatment after welding, its purpose is to hydrogen, eliminate the welding residual stress and the restoration of plastic materials. However, because of the difference of sealing material, and thermal aging can lead to the body after welding deformation, the valves for heat treatment, whether to or should do to ensure the quality, at home no provisions in the relevant standard. At present, the foreign large welding valve has entered the market in our country, should be based on which specification acceptance or valves without heat treatment after welding is in accordance with the requirements, is worth discussing and research. For large welding valve, therefore, such a specific product, especially if it must carry on the thermal aging after welding, must conduct a comprehensive test, test, including the welding groove, the form of joint, stress distribution and temperature control and eliminating stress deformation, determine welding joint is reliable in performance, and formulate the corresponding specification, in order to ensure the quality and reliability of the valve.
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