bsen636-20xxplywood—specifications-資料下載頁

【導讀】PolicyGroupat303-397-2295.`,,,,``,`,,,,`,,,`,,`,`,``,,PolicyGroupat303-397-2295.`,,,,``,`,,,,`,,,`,,`,`,``,,PolicyGroupat303-397-2295.`,,,,``,`,,,,`,,,`,,`,`,``,,

　　

【正文】 non constructional applications, the following applies : Formaldehyde release of plywood for exterior use may be not determined. In this case, information shall be given that it shall be used only for exterior application. Plywood for internal use shall be tested and classified into one of two classes: E 1 or E 2. The test requirements for both initial type testing and factory production control/continuous surveillance are laid down in Table 3 for E 1 products and table 4 for E 2 products. NOTE 1 Boards of Class E 1 can be used without causing an indoor air concentration greater than 0,1 ppm HCHO in condi tions according to ENV 7171. The test requirement does not apply to plywood to which no formaldehyde containing material were added during production or in postproduction processing. These may be classified E 1 without testing. NOTE 2 Example of such plywood is uncoated, coated or overlaid plywood glued with resins emitting either no formaldehyde or negligible amounts of formaldehyde after production as e. g. isocyanate, or phenolic glue. NOTE 3 The limit values for the class E 1 are given in Table 3 and for class E 2 are given in Table 4. `,``,`,`,`,`,`,``,``,`,`,`,` Copyright British Standards Institution Reproduced by IHS under license with BSI Uncontrolled Copy Document provided by IHS Licensee=Bureau Veritas/5959906001, 11/08/2020 05:10:42 MST Questions or ments about this message: please call the Document Policy Group at 3033972295. 8 EN 636:2020 (E) Conditioning of test pieces Factory production control For factory production control by gas analysis, a test may be carried out within 3 days of production. A value of 5 mg/m2 (release class E 1) or 12 mg/m2 (release class E 2 ) gives an indication that the plywood will probably conform to the values given in Tables 3 and 4 after conditioning for 4 weeks. The manufacturer has to ensure this correlation. External control The test pieces shall be conditioned for 4 weeks at (20 2)176。C and (65 5) % relative humidity before testing. Table 3 — Definition of formaldehyde class E 1 Initial type testinga Test method ENV 7171 Requirement Release 0,124 mg/m3 air Factory production control Test method EN 7172 Requirement Release 3,5 mg/m2 h or 5 mg/m2 h within 3 days after production a For established products, initial testing may also be done on the basis of existing data with EN 7172 testing, either from factory production control or from external inspection. Table 4 — Definition of formaldehyde class E 2 Initial type testing either Test method ENV 7171 Requirement Release 0,124 mg/m3 air or Test method EN 7172 Requirement Release 3,5 mg/m2 h to 8 mg/m2 h or 5 mg/m2 h to 12 mg/m2 h within 3 days after production Factory production control Test method EN 7172 Requirement Release 3,5 mg/m2 h to 8 mg/m2 h or 5 mg/m2 h to 12 mg/m2h within 3 days after production 6 Requirements for plywood for use in dry conditions (EN 6361) Bonding quality The bonding quality shall ply with the requirements of bonding class 1 of EN 3142. Biological durability Plywood shall be appropriate for prevailing climatic conditions. The risk of attack is outlined in hazard class 1 of EN 3353. NOTE Guidance on factors affecting durability and on precautionary measures which may be considered as necessary can be found in ENV 1099. `,``,`,`,`,`,`,``,``,`,`,`,` Copyright British Standards Institution Reproduced by IHS under license with BSI Uncontrolled Copy Document provided by IHS Licensee=Bureau Veritas/5959906001, 11/08/2020 05:10:42 MST Questions or ments about this message: please call the Document Policy Group at 3033972295. 9 `,``,`,`,`,`,`,``,``,`,`,`,` EN 636:2020 (E) 7 Requirements for plywood for use in humid conditions (EN 6362) Bonding quality The bonding quality shall ply with the requirements of bonding class 2 of EN 3142. Biological durability Plywood shall be appropriate for prevailing climatic conditions. The risk of attack is outlined in hazard class 2 of EN 3353. NOTE Guidance on factors affecting durability and on precautionary measures which may be considered as necessary can be found in ENV 1099. 8 Requirements for plywood for use in exterior conditions (EN 6363) Bonding quality The bonding quality shall ply with the requirements of bonding class 3 of EN 3142. Biological durability Plywood shall be appropriate for prevailing climatic conditions. The risk of attack is outlined in hazard class 3 of EN 3353. In this hazard class, the performance of most plywood will be promised if suitable preservative treatment and/or relevant surface and edges coating is not applied and if the panels are not properly maintained and installed. NOTE Guidance on factors affecting durability and on precautionary measures which may be considered as necessary can be found in ENV 1099. 9 Supplementary properties For certain applications information on some supplementary properties can be required. Some of these supplementary properties are listed in Table . On request this information should be provided by the supplier. These properties shall be determined according to the European Standards listed in Table . If there is no European Standard available the method used shall be fully described in the test report. 10 Verification of pliance General Verification of pliance with this European Standard shall be carried out using the test methods listed in Table 5. External control External control of the factory, if