TAPPI Visual Inspection Charts
My TAPPI Story: McKenna Goulette
Special cooks were carried out under different compacting pressures. New chips with uniform length and thickness were cooked to measure their compressibility and flow resistance in cooking. The specially screened reference chips were made in a conventional sawmill chipper. The new chips were found to be slightly more compressible than the reference chips. Under low pressure, the former have a little higher liquid volume fraction than the latter at the same delignification degree, but under high pressure their behaviour is the same. According to the flow dynamic modelling, both types of chips have a similar flow resistance under different compacting pressures and flow rates. As the difference between new and reference chips is quite small, no major changes can be expected in industrial digesters.
Experience the Power of Publications in 2026
Sponsored by the Recovery Boiler Program R&D Subcommittee of the American Forest & Paper Association (AF&PA) and published by TAPPI Press.
The best-selling text to introduce the entire technology of pulp and paper manufacture.
A project of the Yankee Dryer Safety & Reliability Committee.
TAPPI Press offers some of the most in-depth resources and references for the forest products and related industries.
Available for Purchase – Conference Proceedings
TAPPI maintains a record of key conference papers, presentations, and other conference publications, available for purchase in a variety of formats.
Flow Compressability and Resistance of Chips Made With a New Chipping Technique, 1998 Pulping Confer