3PE Steel Pipe Inspection Procedure

2022-05-07

First, the 3PE‑coated steel pipes are inspected against a comprehensive set of criteria to ensure they meet the requirements and specifications for manufacturing insulated steel pipes. Any rust on the pipes is removed, and the pipes are examined for signs of corrosion. Next, the de‑rusted and anti‑corrosion‑treated 3PE‑coated pipes are inserted into polyethylene sleeves, and the assembly is formed by pulling the pipe through the sleeve. Subsequently, end caps are repaired, and polyurethane foam is injected to fully fill any voids. Finally, the completed insulated steel pipes undergo final quality inspection.

3PE steel pipe

First, taking into account various conditions… 3PE steel pipe Conduct inspections to ensure compliance with the requirements and conditions for manufacturing insulated steel pipes. Inspect and remove rust from the steel pipes, and check… 3PE steel pipe Has it been corroded? Secondly, after rust removal and anti-corrosion treatment… 3PE steel pipe It is inserted into a polyethylene casing and formed by pulling the pipe through. Subsequently, the end caps are repaired, and polyurethane foam is injected to fully fill any voids. Finally, it is inspected. 3PE steel pipe Perform final inspection on the finished insulated steel pipes.

  3PE steel pipe Before applying the anti-corrosion treatment, the base material requires recording and inspecting the steel pipes upon their arrival at the pipe‑in platform. The external surface of each pipe is then blast‑cleaned to remove rust, followed by verification of the anchor‑profile depth and cleanliness to ensure compliance with specifications. Any pipes that fail to meet these requirements are manually ground with an abrasive wheel until they pass inspection. Tape is wrapped around the pipe ends, and a dust‑removal process is performed. The pipes are subsequently heated in an induction furnace to the specified temperature, coated with adhesive using the adhesive extruder, sprayed with epoxy powder, and overwrapped with polyethylene using the PE extruder. Finally, the coated pipes undergo water cooling, and those that pass inspection are… 3PE steel pipe The products are marked by spraying, placed on the tube‑stacking platform, and then stacked.


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