Seeking help regarding the factory serial number of the valve
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I would like to ask everyone: which part on the valve body is the factory serial number? I’ve searched for it on the valve for a long time but couldn’t find it. (It’s not the valve model.) Also, when testing the pressure of valves used in pressure pipelines before installation, how do people mark those valves? (How to prove that a valve on a pipeline has been pressurized)
First, the valve should not have a factory serial number； Second, the pressure testing of valves upon their arrival at the factory is mostly a formality; it’s simply impossible to carry out proper installation work or comprehensive plant overhauls.
The factory serial number should be on the nameplate, engraved there with an engraving machine
Valves usually have a metal nameplate with a number on it.
Our company’s factory serial numbers are all marked on the flange using steel lettering
This post was last edited by jujiangliu on 2015-8-19 at 13:57. The factory serial number of the manual valve is usually indicated on the label at the center of the handwheel. Valves from reputable manufacturers undergo strength tests before leaving the factory. All our valves must undergo strength tests before installation; otherwise, explosions could occur, with consequences that are unimaginable.
Thank you all. I checked several valves on site, and none of them had factory serial numbers. I would like to know how, in situations like this, valves are marked after undergoing strength tests – which pipeline they are intended for use in. In other words, how can any valve on a pressure pipeline be linked to its strength test report?