【Weekly Topic】How to remove all material from pipelines with recessed pockets
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In many production units, there are pipelines with recessed areas, which can cause problems during shutdowns or emergency repairs. During the process of purging with nitrogen, it is difficult to completely remove the material from these recessed areas, leading to extended replacement times and material waste； Please everyone share any good methods you know that can ensure clean material removal from the recessed areas What are reasonable technical modification methods for the concave pocket area? To better serve device production! Active participants in the user group will receive a reward of 5-10 wealth points, while those who submit excellent responses will get 15-30 wealth points as a reward! A best responder will be selected for each weekly topic! All sailors are welcome to participate actively! Looking forward to everyone's opinions!
The best approach is to install a drain valve at the lowest point of the recess, along with nitrogen purging. Or vacuum fitting.
If the pipeline in the recess is at a height of about six meters above the ground, how is it appropriate to drain the pipeline and position the valves?
The drain valve should of course be installed there, as close as possible to the main pipeline, in order to reduce accumulation of material and minimize any negative effects. Since this valve is operated infrequently and is only used during maintenance or shutdown periods, a small platform is needed, tailored to the specific conditions, to facilitate operation.
The first valve is installed near the lowest point of the recess; an 8-shaped blind plate is placed below this valve. Another valve is added before connecting to the waste oil line. When operations are stopped and all material from the main pipe has been removed, both valves are opened to drain the oil from the recess. Afterwards, nitrogen is introduced from the main pipe for purging. Once cleaning is complete, the blind plate on the first valve is reinstalled in place.
If the horizontal pipeline in the recess is nearly 20 meters long, should this drain line be installed at the front, back, middle, or can it be placed anywhere?
This approach requires consideration of anti-freezing and anti-condensation measures for winter production.
Any of the front, back, or middle point will do, as long as it is at the lowest point of the recess, and then a point that is close to the oil spill line.