Problems encountered when installing gaskets
Thread Content
This post was last edited by sunjl1981 on 2013-1-6 23:24. Because the primary salt water pipe is thick, the gasket is rubber and not shaped. When installing the gasket, workers used transparent tape to fix the gasket, and then connected the pipes and tightened them with screws. In this way, the transparent tape remains in the pipe. During purging and pressing, some of the tape will definitely remain in the pipe. The tape will definitely affect the quality of the salt water. Is this impact serious? Will tape be oxidized and decomposed by salt water? Is there any good way to fix the gasket? The pipe is oriented horizontally. # + + .
Reply 1# wanghb0530 What kind of tape do you use? How much did you use? How to use it? In fact, you can use double-sided tape and stick it to the rubber pad at multiple points, then stick it to the flange surface and press it tightly. It will not hinder the pipe. If you use that kind of brown, wide packaging tape to wrap the rubber gasket on the flange, there will definitely be residue, and it will definitely be torn off and enter the salt water system. However, these things have no impact on the quality of the salt water, so there is no need to worry. It's easy to get stuck in elbows, flanges, valves, and pumps, and you can just pull it out when the time comes. No big deal.
When I encountered it before, I used sealant to directly stick the gasket on it (just stick a few points on the gasket). The other person above has already made it very clear.
If the sealant sticks on, it will be unlucky to replace the gasket next time. Whoever replaces it will scold you. When we use large-diameter gaskets, we always leave one (small-diameter) or multiple ears, so that the position of the gasket can be adjusted from at least four directions, up, down, left, and right, especially when it is inconvenient to attach gaskets to large-diameter flange connections. It is also very good to use on equipment such as heat exchanger heads. When leaving the ears, be careful not to conflict with the bolt holes, otherwise it will be easy to block the bolt holes during adjustment and make it difficult to put the bolts on. In addition, the larger the diameter, the easier it is to deform when the flange is pressed, and the harder it is to seal well. Therefore, the larger the diameter, the thicker the gasket thickness required. Under normal conditions, acid-resistant rubber sheets have a high calcium and magnesium content and are not suitable for use in refined salt water. Although EPDM rubber is good, it is relatively too soft. PTFE-coated rubber gaskets are very suitable, and the cost and strength can be guaranteed. The problem is that this thing is a finished product, and there is no way to leave ears, so it can only be pasted on the flange.
Reply #2 Benbenxuan has actually considered using double-sided tape. The construction team said it was afraid of affecting the sealing of the gasket. I feel that the double-sided tape is so thin that it will not have any fatal effects. It is best to tighten it with screws evenly and firmly. With the thickness of double-sided tape, it is completely negligible.
Reply 4# Benbenxuan used the same kind of yellow transparent tape that we usually use to stick books. The rubber gaskets they used were all finished products and there were no ears. After negotiating with them, they couldn't find any other good method and said that this was also done in other companies.
Reply 3# 181128425 I have also encountered some that are glued with butter. Apply a little butter to temporarily stick the gasket, then align the pipes and tighten the screws. It seems that if you use sealant, it will be difficult to replace the gasket.
Support me, this method is generally used and it is very effective.
These are all lazy methods. In fact, there is no need to use any external methods at all. You only need to connect the two bolts at the bottom and put the gasket directly in so that it will not fall out. When it is critical, use a screwdriver to push the gasket upwards. If it is a concave and convex surface, it is even easier. If you cut the gasket yourself, just leave an ear and everything will be solved.
Reply 9# ysl12345 I also thought the gaskets were easy to put in, but I realized it was easier said than done after seeing it with my own eyes. Those are finished gaskets, not the ears you mentioned.