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The bolt-up pattern on pipe flanges refers to the specific arrangement and sequence in which bolts are tightened to secure the flanges together. This pattern is typically designed to ensure even distribution of stress and to prevent misalignment or warping of the flanges. Commonly, a star or crisscross pattern is used, starting from the center and moving outward, to achieve uniform compression of the gasket. Proper bolt-up procedures are crucial for maintaining a leak-proof seal in piping systems.

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1mo ago

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Why are bolt holes for a flange never placed on the vertical?

I would say because there has to be a standard method of installing flanges that everyone needs to follow. For the simple reason when installing or replacing items such as valves with welded or otherwise fixed flanges, if there was no standard the replacement valve would be 1/8 of a turn or 45 degrees off center if the piping flange bolt holes were on the verticle and the valve flange bolt holes were not. This would be in the case of 4 or 8 bolt flanges.Also in the case of non flanged valves where long bolts pass thru both flanges and squeeze the valve to make the seal a vertically placed bolt hole would interfere with the valve operator or handle preventing the valve from being mounted straight up, down or horizontally.


What type of pipe do you use to hook up a water riser?

water pipe


What is the difference between 6A-6B and 6A-6BX flanges?

6A-6B flanges are ring type joint which is not developed for face to face make up, where the bolting forces act on gasket. 6A-6BX flanges are also ring type joint but it is developed with raised face hence the bolting forces act on this raised face and not on the gasket if it is properly placed. And also the raised prevent the flange damage from excessive bolting torque.


What is take up when bending pipe?

Take-up in pipe bending refers to the amount of material that is shortened or lost in length due to the bending process. When a pipe is bent, it experiences deformation, which results in a change in the length of the straight section of the pipe. The take-up is important for ensuring accurate measurements and fitting of the pipe in its intended application, as it affects the overall dimensions and alignment. Proper calculations and adjustments for take-up help maintain the integrity and functionality of the bent pipe.


Can a drain pipe rise up and then down for a small portion of the run if the slope of the overall run is quite steep?

You can do this with something like a storm water pipe. Storm water is basically clean and there is unlikely to be any problem with build up of sludge in the pipe. You should not do it with sewerage pipe as it will cause it to block up eventually

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Why are bolt holes for a flange never placed on the vertical?

I would say because there has to be a standard method of installing flanges that everyone needs to follow. For the simple reason when installing or replacing items such as valves with welded or otherwise fixed flanges, if there was no standard the replacement valve would be 1/8 of a turn or 45 degrees off center if the piping flange bolt holes were on the verticle and the valve flange bolt holes were not. This would be in the case of 4 or 8 bolt flanges.Also in the case of non flanged valves where long bolts pass thru both flanges and squeeze the valve to make the seal a vertically placed bolt hole would interfere with the valve operator or handle preventing the valve from being mounted straight up, down or horizontally.


A 18'' Audi rims with 5x112 pattern fits on Pontiac grandprix with 5x115 lug pattern?

No, the bolt pattern is different and the Audi wheel's bolt holes will not match up to the grandprix therefore being unable to bolt up to the grand prix's hubs.


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No, different bolt pattern.


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What is the bolt pattern for a 2009 Toyota matrix?

The bolt pattern should be 5x114.3.Hope this helps... it helps especially before you decide to get new rims, you need to figure out the bolt pattern on the new rims and make sure they fit the same bolt pattern of the 09 matrix. I ended up having to get wheel adapters because at first I didnt know my bolt pattern.