Opening Weld Repair Reinforcement Measures
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In the refrigeration systems for liquid ammonia cold storage, when constructing pressure pipelines, connections between the main pipes are generally made using tees. However, the client at the site insisted on using open-welded connections, and requested that we make changes to the design. I would like to know whether open-welded connections are feasible. What measures need to be taken to maintain the metallic properties of the pipes? Is reinforcement necessary? I’m not sure, so I’m seeking guidance. The operating pressure on the low-pressure side of the liquid ammonia freezer is 0.4 Mpa, with an operating temperature of -20°C. The operating pressure on the high-pressure side is 1.1 Mpa, and the operating temperature is 30°C.
For ordinary media, we don’t have strict requirements here; ensuring quality is sufficient. For torch pipelines, we must use reinforcement rings for open welding. Hazardous media are either handled using tees or branch manifold stations.