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There is always leakage at the welds of the ammonia pipeline

2016-07-21View Original

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The welds in the ammonia pipeline are always leaking, and although the leakage isn’t severe, it’s still annoying. To repair them, it’s necessary to stop the flow of ammonia, and when the ammonia flow is stopped, smoke is generated; there’s no way around this. Is there any special adhesive that can be used to seal these leaks?
Reply #22016-07-21
Is the pressure high? If it’s not too large, a clip can be used to seal the leak; each time such welding repairs are needed,
Reply #32016-07-21
Each time welding repair is done, flushing, purging, and pressure testing are required, which is quite troublesome.
Reply #42016-07-21
It’s all leakage at the base of the branch pipes; it’s impossible to use clamps due to severe corrosion
Reply #52016-07-21
If it’s corroded, just replace the pipe – why weld and repair it instead! It is also necessary to find the cause of corrosion immediately; otherwise, stainless steel should be used instead.
Reply #62016-07-21
We have encountered the situation of replacing entire pipelines. Also, what size is your furnace? To reduce ammonia levels
Reply #72016-07-23
There are now technologies for leak sealing under pressure and reinforcement under pressure. Plugging leaks under pressure means stopping the leak directly while the system is in normal operation. Pressure reinforcement involves strengthening pipes that are leaking or at risk of leaking while they are in operation, in order to prevent further leaks. The prices of both types of technical services are quite high; if there are many leakage points, it is recommended to replace the pipes directly. When changing pipes, attention must be paid to the welding process. One method is heat treatment, which is said to yield excellent results; the other is standard welding: proper beveling of the joints, TIG welding for the root layer, and careful handling of slag during the welding process. More than 6 years have passed since the second method was used in our facility, and not a single leak has occurred.
Reply #82019-07-11
The ignition vent was activated, the fan speed was reduced, and the welding was completed within ten minutes
Reply #92019-07-28
For pipeline corrosion, analyze the corrosion mechanism, upgrade the pipeline material to resolve the issue once and for all, or use clamps to seal leaks under pressure.
Reply #102019-07-29
Corrosion in the ammonia pipeline shouldn’t be that severe; it’s still necessary to analyze the reasons

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