In the power and electrical industry, the long-distance transportation and outdoor storage environment of large equipment are complex. When transformers undergo land, sea, and long-term outdoor storage, weak structural areas such as lifting ports and channel steel bolt holes are prone to water infiltration, causing internal corrosion and seriously threatening the insulation performance and operating life of the equipment. How to achieve packaging sealing and waterproofing, and ensure outdoor storage for several years without water ingress or rusting, has become the core challenge of transformer protection design.
Recently, a certain electrical manufacturing enterprise conducted a rigorous verification of the waterproof performance of industrial rupture resistant membranes for packaging optimization projects of dry-type transformers without casings, targeting the core requirements of outdoor storage for 2 years and sea land intermodal water ingress prevention.
Customer Requirements
The packaging has undergone spray testing and no water vapor has entered. The waterproof sealing meets the standard
The lifting openings, channel steel bolt holes, and other water level protection that are prone to leakage are tightly sealed
Suitable for outdoor storage for 2 years without water ingress or rusting
Suitable for domestic land transportation and overseas sea transportation in all scenarios
Experimental Plan Design
| Project | Explanation |
| Packaging Materials | PRM industrial rupture resistant film |
| Test Method | Continuous spray test for 30 minutes |
| Test Point | Key sealing positions such as lifting openings, channel steel bolt holes, and top cover film |
| Detection Method | Irreversible color indication label paper when exposed to water (White label paper turns red in water or high humidity environments and cannot be restored) |
| Target Effect | No water vapor enters during unpacking, and the label paper does not change color when exposed to water |
| Test Cycle | On site instant verification |
Experimental Results and Highlights
Tight Waterproof: Continuous spraying for 30 minutes, no water leakage or seepage throughout the packaging
Sealed up to standard: After unpacking, there is no water vapor entering the interior, and all label papers that show color when exposed to water do not turn red
Reliable positioning: The lifting zipper door and the sealing position of the channel steel bolt hole are protected in place
Long term adaptation: simulate the waterproof and rust proof ability of outdoor storage for 2 years and pass it in one go
Before Spraying: The industrial rupture resistant film packaging is complete, and the lifting position and channel steel position are sealed in place
After Spraying: The appearance of the packaging is intact, the interior is dry and clean, and the label paper shows no color change or water invasion marks when it comes into contact with water
The PRM industrial durable film packaging solution accurately solves the long-term pain points of easy water ingress at the lifting port of dry-type transformers, poor sealing of bolt holes, and susceptibility to moisture and rust during outdoor storage. It balances waterproofing, ease of operation, and cost-effectiveness, providing reliable protection for the sea land transportation and long-term storage of transformers.
VCI has always been committed to providing customers with one-stop metal protection solutions, covering the entire process from cleaning, rust prevention to packaging, helping enterprises improve product quality and production efficiency.
If you also face difficulties such as outdoor storage of transformers that are prone to water ingress and rusting, sealing and protection of lifting ports and bolt holes, and reliability of sea land transportation packaging, please feel free to contact us. VCI technical team will tailor a solution for you!
