What are the reducing, reducing, reducing, etc in the pipe joint?. How do they tell each other what they call that?. Seek expert advice
Do not know where you see these pipe joint nouns, you should say are all variable diameter pipe joints.
The pipe joint is divided into cylindrical pipe thread and tapered pipe thread, and the change of diameter refers to the different diameters of the two ends of the pipe joint
You said reducing diameter may be tapered pipe thread, concrete view of pipe joint information, more detailed. You'd better have a picture and see it.
