Database valve length
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Dear sea friends, is the source of valve length in the software database based on standards? Is it still the data returned by the manufacturer? It was found that some of the manufacturer’s standards differ significantly from the required standards, which creates significant difficulties for projects that need to be prefabricated in advance to meet tight deadlines.
It should be based on standards; the manufacturer’s data isn’t up to par for database creation, right?
Personally, I feel that different manufacturers have varying standards regarding dimensions such as valve length. It’s best to determine in advance which manufacturer and which model of valve will be used, thereby minimizing any ambiguity. This is especially true in the chemical industry, where incompatible materials or insufficient pressure resistance can lead to serious consequences. Conduct FMEA (DFMEA) and risk assessment for the design of each valve and pipeline. Take all possible options into consideration.
The low-temperature valves used in our projects come from a national standard database, and they are different from those supplied by the manufacturer; for each project, a signature confirming this deviation was required. After more than four years, it was decided to modify the database to use the valves supplied by the manufacturer instead. There are normal-temperature valves for projects available recently, DN300 size; there are over 500 of them in stock and another 800 or so will arrive. The storage space is limited, so it’s not possible to store them all – the installation work has already been prepared in advance. . . . I checked several manufacturers, and their products all didn’t conform to the national standards. Ugh, what’s the use of these GBT standards?
According to GB/T 12221, almost every product comes in long, medium, and short versions; however, there are also default lengths in the industry, and some manufacturers may use different ones. It is recommended to make such requests at the time of purchase.
Each manufacturer has its own standards. When our factory needed to replace the DN150 PN40 valves, we contacted several manufacturers, but none of them had valves with dimensions identical to those of the old ones. In the end, it’s still the scanning line movement that causes the issue