Thermon polymer insulated heat tracers have an overjacket covering the braid. This overjacket is intended be a chemical corrosion barrier for the braid and also provide additional mechanical strength.
For what chemicals do -OJ and -FOJ overjackets offer protection?
In general for Thermon BSX Self-Regulating Heatng Cables, the polyolefin overjacket (-OJ) is suitable for mild acids, mild bases, and aqueous solutions. If an exposure to solvents, hydrocarbons, strong acids, or strong bases may occur, a fluoropolymer -FOJ overjacket is recommended.
Due to their higher temperature capabilities, process temperature maintenance heat tracers such as HTSX, VSX, and HPT have a fluoropolymer overjacket. The overjacket (-OJ) on these tracers offer maximum chemical resistance protection.
The following Table shows chemical groups that the (-OJ), and (-FOJ) overjackets provide protection.
Chemical resistance is not limited to the examples shown; these are intended to show representative types of chemicals where resistance is provided.
In all cases, chemical resistance is based on incidental exposure. Thermon does not recommend long term exposure of heat tracing products to these or any other chemicals.
| Product Type | Chemical Resistance of Outer Jackets | ||||||||||
| Acids dilute or weak | Acids strong and conc. | Alcohols, aliphatic | Alde-hydes | Bases | Esters | Hydro-carbons, aliphatic | Hydro-carbons, aromatic | Hydro carbons halogen-ated | Ketones | Oxidizing agents, strong | |
| BSX RSX-OJ | √ | NR | NR | NR | √ | NR | NR | NR | NR | NR | NR |
| BSX RSX-FOJ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | NR |
| HTSX VSX KSX HPT TEK HTEK (all -OJ) | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ |
Legend:
| √ | OK for incidental exposure |
| NR | Not Recommended - avoid exposure to these chemicals |
More Info: Electrical Trace Heating Download: Chemical Resistance Guide
Add your comment