Can work be carried out on a naphtha pipeline that has been filled with water?
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Can flanges be welded after flushing and purging the pipeline with clean water following disconnection from the naphtha tank, and then filling it with water?
Refer to the safety technical specifications for hot work, and in accordance with the requirements of the work order, conduct strict checks item by item
As long as the gas detection is satisfactory and the isolation is effective, welding can definitely be carried out – wasn’t it done through displacement?
After effective isolation and satisfactory replacement, it can be welded after being filled with water.
I’m wondering whether filling the pipe with water during welding meets the welding requirements My personal suggestion is to perform steam purging after rinsing with water; if steam purging is not feasible – for example, due to the absence of expansion joints or because the pipelines are too long – one could try replacing the air with nitrogen and then welding the flanges under a nitrogen atmosphere. That’s just my opinion.
How can welding be carried out when it’s filled with water? The requirement is to use water to displace the light oil, then purge with steam; welding can only begin after the samples show satisfactory results