“Which one is correct and comprehensive for “valve model designation”? (High reward)
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Methods for Compiling Valve Models and Valve Markings (Members’ Resource Sharing Area of Pipeline Technology Discussion Forum) wangcp888 2008-4-3 1 / 209 2009-4-15 19:56 by Wenxin Jiayuan Methods for Compiling Valve Models (Members’ Resource Sharing Area of Pipeline Technology Discussion Forum) dabizi120 2008-7-29 3 / 399 2009-4-15 19:50 by Wenxin Jiayuan Methods for Compiling Valve Models According to Standards Set by the Ministry of Machinery Industry (JB308.doc) (Members’ Resource Sharing Area of Pipeline Technology Discussion Forum) jwg379 2008-10-7 1 / 238 2008-11-11 09:27 by mengqq Methods for Compiling Valve Models According to Standards Set by the Ministry of Machinery Industry (JB308-75) (Members’ Resource Sharing Area of Pipeline Technology Discussion Forum) tpc 2008-6-19 1 / 363 2008-7-9 13:04 by huqingyu Methods for Compiling Valve Models and Valve Markings (Highly Useful Reference) (Members’ Resource Sharing Area of Pipeline Technology Discussion Forum) Dongfang Tianzi 2008-5-19 1 / 478 2008-5-20 09:42 by hussar2008 Methods for Compiling Valve Models and Valve Markings (Members’ Resource Sharing Area of Pipeline Technology Discussion Forum) jthlining 2008-4-19 0 / 218 2008-4-19 06:23 by jthlining Knowledge on Compiling Valve Models (Members’ Resource Sharing Area of Pipeline Technology Discussion Forum) ezhtong 2008-4-2 0 / 185 2008-4-2 11:56 by ezhtong Standard Methods for Compiling Valve Models (Members’ Resource Sharing Area of Pipeline Technology Discussion Forum) 174378579 2008-3-16 0 / 218 2008-3-16 00:49 by 174378579 This post was last edited by Meimei on 2009-4-16 11:51]
I have compared all the methods used to code the valve models listed above; there are some that are exactly identical. The original poster should analyze that as well, haha. All are correct. Such standards are established by national standards, manufacturers, or designers. In fact, whichever side it is, it meets or exceeds national standards. The coding method in my design manual is more detailed than those you listed above. \"Design Manual for Power Piping\" Therefore, if the poster wants to use a convincing method, they should adopt the valve model numbering system specified by the Ministry of Machinery Industry (JB308-75): enterprise standards > industry standards > **national standards
Different industries have various standards for the method of specifying valve models, and it’s difficult to say which one is completely correct and comprehensive； Generally, the valve model coding standards of the industry in which it is used are referred to. Here are some commonly used standards for reference: 1. The former Ministry of Machinery standard JB308-75, \"Method for Designing Valve Models.\" 2. The Chinese valve industry standard CVA2.1-84, \"Method for Designing Valve Models for General Industrial Use.\" 3. The former Ministry of Machinery standard JB4018-85, \"Method for Designing Valve Models for Power Plants.\"
The poster is looking for the JB/T308-2004 standard for the method of specifying valve models: http://bbs.hcbbs.com/viewthread.php?tid=444121&highlight=308. JB308-75 has been revoked
The current domestic method for denoting valve models does not specify the materials used for the valve stem and internal components, the type of packing, or the material of the fasteners used for the gasket on the middle flange; as a result, it cannot fully describe the characteristics of the valve. Engineering design must include a valve specification sheet, which should contain the following key elements: 1. The standard numbers used; 2. The name of the valve, its nominal pressure, and nominal diameter; 3. The material of the valve body and the type of connection for the valve body; 4. The material of the valve seat sealing surface; 5. The structure of the valve stem and valve cover, the material of internal components such as the valve stem, and the type of packing used; 6. The type of gasket to be used on the flanges of the valve body, as well as the material of the fasteners; 7. Any other special requirements
Different industries have different standards, and it can be said that all of them are correct. However, when designing or placing an order, it is necessary to fill out the valve specification sheet carefully, so as to avoid errors resulting from providing only the valve model.