FAQs: Corzan® CPVC for Mining & Mineral Processing

In the abrasive, corrosive world of mineral processing, piping material options are more limited. The slurries and chemicals that run through these pipes can quickly corrode or crack other materials are reliably handled by Corzan® CPVC. Here are some of the most frequently asked questions about CPVC in this industry. If you have additional questions or would like more information, please contact us to be connected with one of our piping material experts.

1. What piping materials resist abrasive slurries in mineral processing?

A tough, smooth-bore plastic like Corzan CPVC—particularly Schedule 80 Corzan CPVC—offers good abrasion resistance for abrasive slurry applications, with proven performance in both real-world use and in-lab Taber Abrasion Testing. Lined steel can also be used, though this is often reserved for the highest abrasion areas, as drawbacks like cost, corrosion and maintenance complexity often outweigh the benefits. A plastic like Corzan CPVC eliminates corrosion concerns associated with metals.

2. How does CPVC perform in corrosive or harsh mineral processing environments?

Mining will use extremely corrosive chemicals like sulfuric acid, oxidizers and salts, often at high temperatures. The combination of chemicals and temperatures make it difficult for some materials to perform longterm. CPVC resists most acids, bases, salts and all water types, does not corrode and has a higher temperature rating than many other plastics. Corzan CPVC has decades of field use that demonstrate a continuous service life for mineral processing facilities.

3. Which piping options reduce maintenance in remote or hard-to-service locations?

To reduce maintenance, opt for a piping material with little or no corrosion risk and that can more easily be transported to a site for replacements. Metals are prone to corrosion and weigh significantly more than plastic options. The weight, combined with a more involved installation process (e.g., welding) can make service harder. A plastic like Corzan CPVC eliminates the need to monitor for corrosion, has no need for replacement coatings and is lightweight enough to easily transport to a site. Its simple solvent cement welding process also speeds any required repairs or replacements.

4. What problems can scale build-up cause in mineral processing operations? What materials prevent or avoid scale?

When scale forms inside pipes, the inside diameter is reduced, which reduces flow rates, increases pump energy and costs and can even fully plug the line. While there are ways to minimize scale in metallic piping materials, a plastic piping like Corzan CPVC avoids scale. CPVC has a smooth inside diameter and is inert to many chemicals, reducing the ability of scale to form and to stick to pipes. 

5. Is CPVC viable for chemical dosing and leaching operations?

CPVC is a strong piping choice for chemical dosing and leaching operations in mineral processing. Corzan CPVC has excellent resistance to the acids, bases and oxidizers used for chemical dosing and avoids contamination. It has been used successfully in the field for processes such as electrowinning and tailing lines. 

6. Can CPVC be used outdoors for mining and mineral processing piping systems, and what UV and environmental considerations apply? 

Some CPVC products are suitable for outdoor installations. Corzan CPVC has been engineered with carbon black and titanium dioxide to better withstand UV. It has demonstrated no performance decrease even when slightly discolored by the sun, and its inherent corrosion resistance allows it to weather rain, wind, variable temperatures and salty conditions typical to an outdoor mining environment.