Perma-Cote Frequently Asked Questions & Answers
Q: Why are Perma-Cote fittings so reliable?
A: Keep corrosive elements from the threaded joints. Perma-Cote fittings feature sealing sleeves that keep corrosives from getting into the conduit system through joints and openings, thereby protecting the interior of the system from corrosion.
Perma-Cote’s PVC sleeves are sized so they fit tightly over the coated conduit when assembled and keep corrosive elements from the threaded joints.
Q: Why is the ETL-Verified PVC-001 Certification so important when selecting PVC-Coated galvanized rigid conduit?
A: Passed the stringent requirements of ASTM D870 and ASTM D2247. Not all brands of PVC-coated galvanized rigid conduit have passed the stringent requirements of ASTM D870 and ASTM D2247, the two accepted tests designed to predict SERVICE LIFE of a coating under the two most common conditions that affect the adhesive bonds of protective coatings: heat and humidity. Perma-Cote has. All brands of PVC-coated galvanized rigid conduit manufactured in the U.S. meet exactly the same safety standards established in UL 6. However… not all brands are authorized to carry the ETL PVC-001 label predicting product SERVICE LIFE — and proving that the protective bonding you paid for will actually do its job. Because Perma-Cote is authorized to carry the ETL-Verified PVC-001, you can be assured that it has been independently proven — on a quarterly basis — to have a service life providing more than 10 times longer protection than brands that have not passed identical ETL evaluations.
Q: What is the benefit of Perma-Cote’s PVC coating?
A: The consistently applied 40 mil PVC coating of Perma-Cote ensures that corrosives never touch the metal. The consistently-applied 40 mil PVC coating of Perma-Cote ensures that corrosives never touch the metal. Our specially-formulated PVC is resistant to a wide range of corrosive chemicals and prevents the exposure of the conduit metal to diverse, damaging environments.
Q: What is so important about the bond of the PVC coating?
A: It is critical that the PVC coating on PVC-coated galvanized rigid conduit adhere to the steel substrate. Simply put — if the coating sticks it works. If the coating doesn’t stick it fails. It is critical that the PVC coating on PVC-coated galvanized rigid conduit adhere to the steel substrate of the conduit in order to protect the metal from corrosion.
Q: What is the PVC adhesion test and why is it important?
A: Adhesion testing is a way of proving that you will receive the maximum corrosion protection. Adhesion testing is a way of proving that you will receive the maximum corrosion protection you paid for. Simply described, conduit is immersed in boiling water for a prescribed period of time, after which notches are cut in the PVC coating. A pliers is used to pull the notched test tab that had been created by the cuts. If the PVC coating breaks away from itself without exposing the steel conduit, the adhesion is successful and will protect the metal surface. If, however, the PVC coating pulls away from the steel substrate, adhesion has failed and the bared metal will be vulnerable to corrosion. Click here for a video demonstrating the reliability of successful Perma-Cote PVC adhesion versus the coating failure of an alternative PVC-coated conduit.
Q: I have heard it said that such adhesion tests are not important because PVC conduit is not used in boiling water.
A: Tests are based on accepted ASTM tests. That statement intentionally misses the point. Such tests are based on accepted ASTM tests and are specifically intended to evaluate product performance under conditions of humidity and heat — the two most common conditions affecting adhesive bonds of protective coatings. If you hear this statement made it is in reference to brands of PVC-coated conduit that consistently fail adhesion tests accepted by the industry.
Q: How does Perma-Cote ensure a reliable bond of PVC coating?
A: It’s all about surface preparation. It’s all about surface preparation. Our proprietary Adhesion Enhancement Process (AEP) controls zinc coating so it will receive and hold the PVC coating. This is accomplished with unique mechanical and chemical methods, as well a special primer coating that Perma-Cote offers. The end result is superior PVC bonding to the metal and the additional backup corrosion protection of zinc. Perma-Cote out-performs other coated conduit brands because it was prepared right… right from the start.
Q: With what is the interior of Perma-Cote coated?
A: Perma-Cote features an internal polyurethane coating that has been formulated for optimum chemical resistance. Perma-Cote features an internal polyurethane coating that has been formulated for optimum chemical resistance, durability and protection of the inner conduit substrate.
Q: Will I pay more for the unsurpassed quality of Perma-Cote?
A: Perma-Cote you will benefit from our unique production technologies. No. Absolutely not. With Perma-Cote you will benefit from our unique production technologies — but you will not pay more. Perma-Cote is cost-competitive AND is readily available to reach your job site when and where you need it.
Q: In addition to being corrosion-resistant, is Perma-Cote UV resistant?
A: Specially formulated UV stabilized PVC coating is used on Perma-Cote products. Yes! A specially formulated UV stabilized PVC coating is used on Perma-Cote products to prevent deterioration when exposed outdoors.
Q: How do you protect the threads of Perma-Cote?
A: Computer-controlled ProTECH process. After PVC coating of the conduit, our automated, computer-controlled ProTECH process starts with a laser trimming operation to remove excess PVC from the conduit ends. Next is mechanical surface preparation of the previously chemically cleaned conduit threads. This is critical because surface preparation is the key to a good bond. Next, the clean pipe threads are hot-galvanized using specially designed equipment, including 3-axis robotic arms. After hot-galvanizing, the threads are coated with a clear polyurethane spray, protecting the galvanized thread from corrosive attack. Nothing has touched the zinc coating of our threads!
Q: Does Perma-Cote provide nipples and elbows?
A: Achieve faster installation. Absolutely. We offer quick shipment of a comprehensive, cost-effective line of factory nipples and elbows in both standard and special radius. This enables you to achieve faster installation.
Q: Why does Perma-Cote offer the most effective Form 8 fitting?
A: Patented Perma-Cote V-Seal® fittings use a special interlocking V groove. Our patented Perma-Cote V-Seal(r) fittings use a special interlocking V groove. cover that effectively seal out corrosive environments. All Form 8 cover screws are made from stainless steel with a plastic encapsulated head for an optimal seal around the screw opening. No one else provides this level of proven protection.
Q: What do the sealing sleeves of Perma-Cote do?
A: Keep corrosive elements from the threaded joints. Perma-Cote’s PVC sleeves are sized so they fit tightly over the coated conduit when assembled and keep corrosive elements from the threaded joints.
Q: Why are Perma-Cote couplings ribbed?
A: Protects the coating from cuts and abrasions. The molded ribs on Perma-Cote couplings provide an extra thickness of PVC that protects the coating from cuts and abrasions caused by the teeth of wrenches and other installation tools.
Q: What is so special about Perma-Cote clamps?
A: Ensure proper fit and ease-of-installation. Perma-Cote clamps are designed specifically for PVC-coated conduit. All Perma-Cote pipe straps, clamps and clamp back spacers are specially designed to fit PVC-coated conduit and, as a result, ensure proper fit and ease-of-installation.
Q: Why does Perma-Cote feature color-coded thread protectors?
A: Quick identification of conduit size. Thread protectors are color-coded for quick identification of conduit size.
Q: Why are specific tools recommended for installation of Perma-Cote?
A: Damage-free installation. Special installation tools are readily available and should be used because they contribute to faster, easier, damage-free installation. Visit the INSTALLATION section of www.plastibond for details about the critical aspects of properly installing PVC-coated conduit.
Q: What is the length of the Perma-Cote warranty?
A: Peace of mind. Five years of peace of mind. The quality of Perma-Cote is so reliable that you can “install it and forget it.”