pipe nipple and union
Thread Content
Everyone, pipe nipples and unions are generally translated as short pipes and union fittings. I was wondering if there is a difference between those with internal threads and those with external threads? That is, the nipple is a short tube with external threads, while the union is a fitting of internal thread type. I would appreciate some guidance from the experts.
Personally, I don’t think the nipple necessarily has to be thread-connected, right? Can it also be welded?
Yes, the NIPPLEs we use for projects also have welding!
The two ends of the short pipe are fixed, while the middle part of the union joint is removable
The nipple comes in both threaded and welded versions; the live knot type is used to facilitate disassembly when connecting threaded pipes.
A NIPPLE is no different from a regular PIPE; it can be used with any type of connection. In other words, a NIPPLE is simply a PIPE – it’s just used for pipes with a diameter of less than 2 NPS, typically those with a length of 3”. A NIPPLE is also known as a PIPE UNION, which in Chinese is called a \" flexible joint \" and is designed to facilitate installation. A UNION, on the other hand, is considered a FITTING
According to the original poster, nipple is on a 1-to-1 ratio with couple; it’s completely different from union
Nipples are not identical to pipes; in practical engineering applications, they are purchased together with pipe fittings, available in both forged and welded forms, depending on the size. The meaning of “nipple” also has various interpretations, such as a short section, a reduced-diameter tube with a small bore, or a double-threaded end. The port types for nipple include PE, BE, and TE.
Personal understanding: Union usually refers to a flexible joint, which is what experienced workers often call an “oil print””； Nipple generally refers to the fitting used to connect hoses at a hose station, with various connection methods available (welding/screw connection/flange connection) ； A pipe generally refers to a short tube, while a couple specifically denotes a short tube connection with flanges at both ends, commonly known as a \"wheel hub pipe\". Feel free to point out any mistakes:D
Thank you all~ As the saying goes, truth becomes clear through discussion; I believe that after our talks, everyone now has a deeper understanding of this~
I won’t create a new thread anymore. I would like to ask my friends: what is the standard number for NIPPLEs according to American standards? I’ve seen some material lists specify B16.11, but I couldn’t find any information on NIPPLEs as a fitting in this standard.