Are the pipe tees for piping chosen arbitrarily?
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Are the pipe tees for piping chosen arbitrarily? Can it be changed to any amount, no matter what the starting amount is? For example, DN125→DN20: is there a reduction in size that goes directly from DN125 to DN20? Is the change too great? Can’t the manufacturer produce it?
Of course not, they are all standard parts; check 12459
No, it is possible to check the specifications; the diameter change must not exceed one order of magnitude
DN125→DN20: it doesn’t change like that. The standards specify corresponding reduced diameter sizes.
Definitely not; they all follow standard domestic standards, with reference to GB 12459-2005 for steel butt-welded seamless pipe fittings.
The latest standard is GB/T 12459-2017
A span that large generally doesn’t exist. If it is to be done, it needs to be custom-made, usually as a non-standard item. You can refer to 12459 for customization. I’ve ordered it before; it’s really convenient!
Attention should also be paid to the application of concentric and eccentric designs
The national standard GB/T 12459-2017 can be queried
Standard components with a single large or small end do not have such a large span. If it is necessary to classify them in this way, there are two approaches: 1. Customize non-standard components； 2. Assemble using multiple large and small ends.