Scrubber heaters contact suspended solids. A glass-fiber filled PTFE coating resists abrasion. The glass filler gives hardness.
Material-selection service specifies the abrasion-resistant coat. At each outage, the coating thickness is measured. Procurement buys the abrasion-grade heater. The result is a scrubber heater that handles both abrasion and chemistry, because the hard film takes the solids impingement.
Scrubber heaters contact liquid with suspended solids that abrade the surface. A smooth PFA wears quickly. A glass-fiber filled PTFE coating resists abrasion. The glass-fiber filler gives the coating hardness, and the PTFE matrix is chemically inert. Material-selection service specifies the abrasion-resistant coat. At each outage, the coating is inspected for wear. Procurement buys the abrasion-grade heater. The result is a scrubber heater that handles both abrasion and chemistry, because the hard, dense film takes the solids impingement.
Coating acceptance is measured, not visual. A thickness gauge reads the film at multiple points.
Material-selection service sets the thickness range. At each batch, the gauge readings are recorded. Procurement requires the gauge report. The result is a verified barrier, because the coat is measured at representative points.
Coating acceptance is not visual; it is measured. A thickness gauge reads the film at multiple points. If the thickness is too thin, the coat is rejected. Material-selection service sets the thickness range. At each batch, the gauge readings are recorded. Procurement requires the gauge report. The gauge is also used at each outage to measure wear. The result is a verified barrier, because the coat is measured at representative points rather than judged by appearance.
A glass-fiber filled coating is non-conductive. It covers the dissimilar-metal junction and isolates the metals.
Material-selection service specifies the non-conductive coating. At commissioning, the insulation resistance is measured. Procurement buys the coated heater. The result is a sealed joint, because the non-conductive coating breaks the cell.
A glass-fiber filled coating is non-conductive. It covers the dissimilar-metal junction and isolates the metals, breaking the galvanic cell. The coating also covers the fasteners. Material-selection service specifies the non-conductive coating. At commissioning, the insulation resistance is measured. Procurement buys the coated heater. The result is a sealed joint, because the non-conductive coating breaks the galvanic cell and covers the junction and the bolts.
