Deep reflection on valve lot numbers
Thread Content
The furnace number on the valve refers to the identifier used during the casting process of the valve body; it does not affect the quality of the valve. It is a marking used by the manufacturer to track product quality, and through this furnace number, it is possible to identify the operators involved in production as well as the contents of various elements in the steel. One furnace number can correspond to multiple batch numbers, but one batch number can only correspond to one furnace number. Why don’t some valves have a furnace number? This depends on the specific manufacturing process. For valves that are cast, there is a corresponding furnace number assigned to them; examples include cast steel gate valves, cast steel globe valves, cast steel check valves, cast steel ball valves, and so on ； However, for valves that are manufactured through welding processes, such as blue filters, T-type filters, welded butterfly valves, etc., which are made using steel plate welding techniques, they naturally do not have a furnace number. Why do the valve models produced by many manufacturers in Wenzhou all have the serial number “8888”? This issue is worth careful consideration. I found a few pictures online of cast steel gate valves (see the images below); the furnace number on each picture was 8888. By clicking on those images, I obtained the manufacturer’s phone number. The manufacturer’s response was that this number 8888 isn’t an actual furnace number – it’s something built into the valve mold. After the casting is produced, the manufacturer can change it to any number they want. (The manufacturer said that since 8 is the easiest number to modify, it can be changed into any digit from 1 to 9 and 0 simply by using a grinder for some polishing). After hearing what he said, my mind was in chaos – manufacturers these days are really not responsible enough when it comes to quality. What if problems arise with these valves in the future, how can we determine which batch is responsible for those issues? http://www.xyzhf.com/uploadfile/2015/0812/20150812093452356.jpg Do valves from the same batch but different lots have the same chemical properties? Valves from the same furnace batch have identical chemical and mechanical properties, while valves from different batches within the same furnace have the same chemical composition but different mechanical properties. How many furnace numbers are there on a valve? Many people think that a valve has only one furnace number, the one that can be seen on the valve body. In fact, corresponding furnace numbers are also present on the various valve components, including the gate, valve disc, rocker arm, valve stem, brackets, and so on. Different valves have different components, but all of them come with corresponding furnace numbers (see the image below): http://www.xyzhf.com/uploadfile/2015/0812/20150812094424188.jpg. Why are the chemical element compositions listed in the material reports the same? Now many customers request that manufacturers provide material reports upon shipment, and the manufacturers have agreed to do so. However, when they received the material report, the customer was puzzled: why were the material compositions of different types of valves all the same? I assure you here that if the furnace numbers of the valves are different, then the various chemical elements will also be different.
An incident occurred – were the people responsible for producing these valves still at the original company at that time? In the end, it’s always messy; once a problem arises, one has to study it ； Two have problems; study a pair.
Haha, this is indeed a common issue with valves in Wenzhou
The original poster is from Wenzhou himself – how could he not be aware of the current situation of valves in Wenzhou? It makes me doubt my motivation for posting this to you! Indeed, many valves from small factories these days have a furnace number of 8888! Moreover, the materials provided to customers are all copies!
It can be seen as advertising or promoting literacy, but it doesn’t violate the rules; at most it’s borderline, so just leave it as is~
Wenzhou valves – it’s the hometown of valves, a really great place
Not buying cheap goods is the only true wisdom
I am from Wenzhou, that’s true. There are a few people from Wenzhou who will admit these mistakes and face them head-on. Can you do it? Stop talking about whether to run ads or not; you’re so cynical. What are their intentions again?
Regarding the topic of Wenzhou valves. Actually, although our factory is part of Xiamen Shuangte, the location where its facilities were built was chosen to be in Wenzhou as well (this is to achieve concentration and take advantage of the location). The day before yesterday, a customer called and, referring to our factory, said that valves from Wenzhou are of poor quality and not reliable at all; Wenzhou valves have become a synonym for low quality. I said that Wenzhou has well-known valve manufacturers, as well as many small-scale valve producers; this place can supply high-quality valves as well as those at very low prices, so it’s not fair to generalize about them all. Everyone in the industry is aware of this situation, but isn’t there anyone who actually manufactures valves? Of course there are. Wenzhou is located in a strategic position, with numerous enterprises both upstream and downstream, making it very suitable for valve manufacturing – it depends on what level the manufacturer aims to achieve. First-class manufacturers also have third-rate products, and third-rate manufacturers can produce first-class products as well; there is nothing absolute. As for the original poster, they came up with this idea; actually, outsiders are not aware of it, so everyone can learn about it haha. As Old Wang said, it’s just borderline. After all, the ultimate goal of manufacturers is advertising, but if what they offer is beneficial to some people, then that’s fine. Let’s not say anything more, okay? But still, keep it in moderation; after all, HaiChuan is still a technology-focused communication platform. There is a dedicated advertising area where you can place advertisements
I think you’re more like doing advertising; don’t you think so?
For example, that’s all. By showing up more often, I’m essentially advertising my own company. A suspicious person will suspect everything they see.