Heat Sterilization Times of Five Hardwood Species: Stress Wave E-Rating of Specimens

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Heat Sterilization Times of Five Hardwood Species: Stress Wave E-Rating of Specimens

Authors

Wang, Xiping

Forsman, John W

Erickson, John R

Published Date

2004-09

Publisher

University of Minnesota Duluth

Type

Technical Report

Abstract

Heat Sterilization of lumber, timbers and pallets is currently used to kill insects to prevent their transfer between countries in international trade. A typical requirement is that the center of any wood configuration be held at 133 °F (56 °C) for 30 min. However, the time required for the center to reach this temperature can vary widely depending on a number of factors such as wood species, physical prope1iies, cross-sectional dimensions, and heating medium, etc. The overall objective of this project was to quantify the effects of wood species, cross-sectional dimension, and heating medium on the time required to heat the center of hardwood lumber and timbers to 133 °Fat a heating temperature of 160 °F (71 °C). A stress wave E-rating procedure was also added to examine if the stress wave properties of lumber and timbers can be any useful in predicting heating times for untested species in the future.

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Natural Resources Research Institute

University of Minnesota Duluth

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Technical Reports
Materials & Bioeconomy

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NRRI Technical Report; NRRI/TR-2004/26

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Wang, Xiping; Forsman, John W; Erickson, John R. (2004). Heat Sterilization Times of Five Hardwood Species: Stress Wave E-Rating of Specimens. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/256897.

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