Standards Development
This document identifies and defines terms, specifies a means of classification, and gives a nomenclature of components for machine-fed woody biomass chippers, grinders and shredders used in forestry. Its aim is to establish a uniform method of describing the various configurations of these types of forestry machines.
Machines covered by this document include:
drum chippers;
- disc chippers;
- screw chippers;
- horizontal grinders;
- tub grinders;
- slow (low) speed shredders (rotational speed less than 100 rpm).
Machines not covered by this document include:
- chippers that are manually-fed;
- high speed shredders (rotational speed greater than 100 rpm).
Following the cancellation of two projects (ISO 21116 and ISO 21119), it was agreed at the TC 23/SC 15 Plenary (September 2020) that US experts would put together a new proposal that would combine the concepts covered in ISO 21116 and ISO 21119 into a single document. This document attempts to accomplish that task.
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