What’s the term for anti-Flange? ?
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Yesterday, a new colleague at my workplace was looking through old tender documents and drawings to learn more, and came to ask me what a counter-flange meant. I casually replied that it referred to a matching flange, but later felt that response wasn’t appropriate; I then checked various manuals but couldn’t find a precise definition； I think \"reverse flange\" specifically refers to those threaded flanges that require one male thread and one female thread; the terms \"male flange\" and \"female flange\" originate from this concept. Can’t it simply be called paired flanges? What do Haiyou think?
I think that in many tender documents issued by CNPC and Sinopec, the procurement specifications require the provision of counter flanges; why not simply ask the supplier to provide matching flanges instead? Everyone would understand that request. I’m trying to find out the origin of the term \"counter flange\". . .
For the equipment purchased, the flange of the equipment is attached to the equipment itself; then what is a reverse flange if it’s not a matching flange?
This post was last edited by wanlirn on 2019-8-15 at 10:18. I knew it was a matching flange; I checked Baidu again and found that it was as I thought – a counter-flange is actually designed specifically for threaded flanges, enabling connection with one male thread and one female thread. I also checked the English version of the tender documents, where they simply use the term “match of flange”. I wonder which expert wrote the textbooks or manuals back then, as this term has been used ever since
I’m hearing this statement for the first time too. But it’s more or less as you understand; this estimate applies only to threads.
It should be a reverse flange; in this case, the outer diameter of the flange is the same as that of the cylinder body, and it involves end welding. Threaded holes are provided on it, but they are not drilled through, which is why it is also included in SW6.
An anti-flange is the common term for a mating flange.
The 7.6 reverse flange in GB/T150.3 seems to refer to something different from the reverse flange mentioned by the original poster.
A reverse flange and an anti-flange are not the same thing; the absence of a single character changes its meaning completely.