Questions about reducing tees?
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Question 1: Are there reducers of unequal thickness available (for example, for a reducer of 350X350X200, the wall thickness of the DN350 pipe is 15.09, while that of the DN200 pipe is 10.31, with both having the same wall thickness grade of Sch60)? Question 2: How should thickness grades be indicated for equal-thickness reducing tees with different wall thicknesses? (For example, in a tee of dimensions 350X350X200, the wall thickness of the DN350 pipe is 15.09, corresponding to a thickness grade of Sch60; the wall thickness of the DN200 pipe is also 15.09, corresponding to a thickness grade of Sch100.) ）? I hope friends with experience in design or procurement can help answer this question. Thank you in advance! ! 08 HaiChuan: Learn together*, improve together. :handshake Last edited by c_m_1979 on 2008-1-8 18:03]
Since I follow the American standards, I’ll use my own examples to illustrate; I’m sure you’ll understand as well. First, regarding your first question: there are some issues in this regard. For example, when going from 3” to 2”, both have a wall thickness of SCH80, with values of 7.62 mm and 5.54 mm respectively. But when going from 3” to 1 1/2”, the wall thickness for the 3” pipe is SCH80, at 7.62 mm, while that of the 1 1/2” pipe is SCH160, at 7.14 mm. In other words, when there’s a change in diameter, the wall thicknesses cannot remain the same. In the case of changing from 350 to 200, the 200 mm pipe uses SCH60, whereas the 350 mm pipe uses SCH40, with a wall thickness of 11.13 mm; so the wall thicknesses in this case are somewhat similar to yours； Regarding the second question, we haven’t used SCH100 pipes yet. There’s no need at all for you to consider that; you should think about what grade of SCH pipe is being used for the 200-series branch pipes connected to your tee fittings – use the same grade for those branch pipe connections! ! ! Welcome to continue the discussion: handshake :handshake :handshake
The diverter in a hydroelectric power station has walls of different diameters and thicknesses
1) Of course, reducer tees with varying thicknesses exist, and many of them are used in engineering applications； 2) For equal-thickness reducing tees with different wall thickness grades, the specifications shall be indicated separately as long as the pressure grade requirements are met. In engineering, for such situations, we generally require order drawings, as this is the safest approach.
I have never seen tees with different wall thicknesses among national standard pipe fittings.
I haven’t studied the national standards either, so I’m not very familiar with them. But as long as the reducer tee has the same wall thickness as the pipe it’s connected to, there should be no problem. As for cases where the three ports of a standard reducer tee all have the same wall thickness, then it’s necessary to give priority to the tee and choose one with a thicker wall thickness, so that the tee isn’t weaker than the pipe it’s connected to :)
They’re talking about a reducing tee! ! ! :Q: I’ve also never seen equal-diameter tees with different wall thicknesses in American standards :D
I just noticed today that there’s an issue with what was said on the second floor: when talking about reducer tees, it is mentioned that the pipe diameters are different, but it isn’t stated that the wall thicknesses must also be different. Therefore, there are reducer tees with equal wall thicknesses, as well as those with different wall thicknesses. What was said on the 2nd floor—that only the diameter changes while the wall thickness must remain the same—is incorrect. Here’s a reminder to the original poster!