What is the thickness of the manhole cover lugs and flange lugs?
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This post was last edited by zhangjuhua on 2019-2-20 00:20. I would like to ask if the standards for cover axle lug T1 and flange axle lug T2 are not given. The 2005 version seems to be unequal in thickness, but the 2014 version seems to be equally thick. I downloaded the Tianchenyuan PDF online. Whether it is 0.6 or 4.0MPa, many of them take 22mm. I used to write a standard number. I didn’t pay attention to this problem. Please tell me.: What are the general values for T1 and T2? Are they equal in thickness? Is it also related to the nominal pressure PN? The bevel is generally 7x45°? Does it vary with thickness or PN?
The thickness is generally the same, which is convenient for manufacturing. The thickness is related to the weight of the manhole, which can also be said to be related to the nominal pressure. The greater the pressure level, the heavier the manhole. You can follow the standard construction drawings. The thickness is 22 or 28. There is no need to explain too much.
Just take the same thickness. The axle lugs can only bear the weight when the manhole cover is opened, and the thickness does not need to be too thick.
Refer to the HG/T20514~20527-2005 manhole construction drawings atlas, which contains parts drawings.
Thank you, the standard has been updated, the thickness of individual flanges has changed, and some differences are quite large.
The shaft lug is only used to bear the weight of the flange cover when the flange cover is lifted. It does not bear the pressure itself. It has been designed to be thick enough according to the standard. It is 22mm and can bear the weight of the flange cover no matter how high the kilogram level is.
This post was last edited by zhangjuhua on 2019-4-27 18:22 Yes, I saw it, it is generally 22, and the larger one is 28. It is estimated that it can be changed appropriately, but it is a bit strange. Is the thickness of 22 steel plates common? If it exceeds 20, it seems to be in 5 steps. Is it possible to use 25 cars to 22? In this case, just use 25, why bother?