Answers

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  How should corrugated steel culverts be maintained and handled?

  1. Strictly control the quality of raw materials for corrugated steel culverts. Corrugated pipes brought to the site must be stacked neatly and orderly, and no one should step on them. Corrugated steel culverts need to be covered and protected to prevent them from aging prematurely due to wind and rain.
  
  2. The steel corrugated steel culvert should be cut straight, avoiding a beveled cut.
  
  3. Method for corrugated steel culvert joint: The corrugated steel culvert joint should be wrapped with a 0.3-meter-long large corrugated pipe, and both ends should be tightened in half, with no gaps left in the base. To ensure that no empty space is left in the center, markings should be made at both ends of the connector. After finishing, wrap it tightly with tape.
  
  4. When welding reinforcing bars near corrugated steel culverts, measures should be taken to protect the corrugated pipe from being burned. If it is accidentally burned, the burned area should be tightly wrapped with tape.
  
  5. When dismantling the mold, take care to protect the corrugated steel culverts that are exposed at the ends.
  
  

  For further questions regarding corrugated steel culverts, please refer to this article: FEATURE| Corrugated Steel Culvert: The Solution for Cost Reduction and Efficiency Improvement in Infrastructure Engineering

  
  
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  We plan to import steel bars to Vietnam. Are there any restrictions on importing steel bars from your country at present?

  Thank you very much for your inquiry. Currently, there are no special restrictions on imports to your country. You can tell us the specific specifications, quantity, and other requirements of the rebars you wish to buy, and we can provide you with an accurate quote.
  You can contact us in the following ways
  cs@chinasteelmarket.com
  +86-18864881658 (Whatsapp&Wechat)

  
  

  We can provide high-quality steel bars that meet Vietnamese import standards and assist you with relevant customs and certification matters. Please feel free to contact us directly for a detailed solution.  Tel: +86 0435-3793130

  
  
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  How to Remove Rust from Steel Pipes

  Removing rust from steel pipes hinges on selecting the appropriate method for the rust severity and ensuring proper post-treatment protection. Always wear gloves, safety goggles, and a mask before starting.

  For general rust, physical grinding is the most direct and effective approach. If the rust is light, manually scrub with a wire brush or sandpaper. For larger or thicker rust patches, using an angle grinder fitted with a wire wheel will save considerable effort. The goal of grinding is to thoroughly remove loose rust layers until the solid metal surface is exposed.

  For complex pipe shapes or if manual grinding is undesirable, chemical methods can be attempted. Purchase a commercial rust remover, apply it according to instructions, and let it sit. It dissolves or converts the rust, after which the surface should be thoroughly rinsed with clean water. Household items like white vinegar also offer mild rust removal, but are generally only effective for very light rust.

  Regardless of the rust removal method used, immediate rustproofing is essential afterward, otherwise the steel pipe will rust again more quickly. First, thoroughly clean the pipe surface with water and detergent, then dry it completely. Immediately apply rust-preventive oil or spray on specialized rust-proof paint to form a protective layer. This step is crucial for preventing rust recurrence and determines how long the rust removal effect will last.