ISO 16893:2016 pdf free
ISO 16893:2016 pdf free.Wood-based panels – Particl eboard
When a product is used in a load-bearing or structural application, additional information shall be available in the form of characteristic values derived from structural testing (ISO 16572), experimental test results or history of use to validate its performance under the proposed conditions.
It should be noted that engineering design methods do not provide for design for high humid service conditions. The inclusion of P-LB and P-HLB grades in the high hurmid section of the classification matrix (Table 1) is on the basis that performance is validated by experimental test results or history of use.
This International Standard may be used to evaluate groups of panels or production batches. To evaluate a group of panels, this requires that
a) the mandatory tests of Table 2 be applied to samples of the group. Conditioning of test specimens is required as specified in each test method, and
b) the results of the tests be evaluated against the appropriate specification limits in Tables3 to 16,according to the product type and thickness range of the panels. Tables 1 and 2 apply to all product types and thickness ranges of panels.
For density variation and dimensions (Table 3), specification limits are based on the mean values for individual panels (calculated in accordance with Annex A) and are maximum tolerances. For formaldehyde emission, Table 4 gives upper specification limits for individual panel results.
Specification limits in Tables 5 to 16 are based on 5 (lower) or 95 (upper) percentile expressions,according to 7.2 and 7.3.
Requirements for moisture resistance are dependent upon the test method employed to assess this property. Three alternative sets of requirements (Option 1, Option 2 and Option 3) are set out in Tables 9 to 16 corresponding to the three principal recognized methods of evaluation. It is necessary to show compliance with only one of these three options, as follows.
– Option 1: Requirements apply to those particleboards subjected to a cyclic accelerated ageing test, followed by the determination of thickness swelling and internal bond strength, as described in ISO 16987.
– Option 2: Requirements apply to those particleboards subjected to an accelerated ageing test,consisting of immersion in boiling water followed by determination of internal bond strength, as described in ISO 16998.ISO 16893 pdf free.
