Whenever you installed any revit version the pipe will automatically come in system tab as it is a system family, and you can create your own duplicate pipe from the edit type options. But if you need pipe fitting then load the fitting from the below path
"C:\ProgramData\Autodesk\RVT 2020"
When you search the internet for this your going to need to be more specific. Piping systems come in many flavors. The fittings and accessories vary quite a bit.
I NEED PIPE AND PIPE FITTING FOR SPECIAL SYSTEMS.
WHICH I CAN NOT FIND IN REVIT LIBRARY
Can you be a bit specific, which system you are talking about. I am not getting you properly.
@Anonymous wrote:
I NEED PIPE AND PIPE FITTING FOR SPECIAL SYSTEMS.
WHICH I CAN NOT FIND IN REVIT LIBRARY
You may to have to make them yourself or find what you need from a third party source. If you cannot find anything after you search using specific terms related to the systems that you need and/or the manufacturers of those products, you can come back here and ask questions that mention what type of systems you are working with.
i need this pipe family like the image with hub and free tail and i need also it's fittings and accessories
Have you done any searches or checked manufacturers websites for BIM content?