BS EN 622-1 pdf free download

BS EN 622-1 pdf free download. Fibreboards  一 Specifications一 Part 1: General requirements.
I Scope
This European Standard specifies the requirements for some properties which are common to all uncoated fibre-
board types as defined in EN 316.
2 Normative references
This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text, and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies (including amendments).
EN 120, Wood-based panels — Determination of formaldehyde content — Extraction method called the perforator method.
EN 316, Wood fibreboards — Definition, classification and symbols.
EN 322, Wood-based panels — Determination of moisture content.
EN 323, Wood-based panels — Determination of density.
EN 324-1, Wood-based panels — Determination of dimensions of boards — Part 1: Determination of thickness width and length.
EN 324-2, Wood-based panels — Determination of dimensions of boards — Part 2: Determination of squareness and edge straightness.
EN 326-2, Wood-based panels — Sampling, cutting and inspection — Part 2: Quality control in the factory.
EN 326-3, Wood-based panels — Sampling, cutting and inspection — Part 3: Inspection of a consignment of panels.
EN 622-2, Fibreboards — Specifications — Part 2: Requirements for hardboards.
EN 622-3, Fibreboards — Specifications — Part 3: Requirements for medium boards.
EN 622-4, Fibreboards — Specifications — Part 4: Requirements for softboards.
EN 622-5, Fibreboards — Specifications — Part 5: Requirements for dry process boards (MDF).
ENV 717-1, Wood-based panels — Determination of formaldehyde release — Part 1: Formaldehyde emission by the chamber method.
EN 717-2, Wood-based panels — Determination of formaldehyde release — Part 2: Formaldehyde release by the gas analysis method.
3 Requirements
Fibreboards shall comply with the general requirements listed in Table 1 and the thickness tolerances listed in Table 2 when dispatched from the producing factory. For certain uses of fibreboards (see specific standards for fibreboards types and general performance standards for wood-based panels), in the case of dispatch in cut sizes, or when further machined (e.g. tongued ad grooved), special tolerances for nominal dimensions, squareness and edge straightness may be agreed upon. The values given in Table 1 and Table 2 for tolerances for nominal dimensions (thickness, width and length), squareness, edge straightness and density within a panel, are characterized by a moisture content in the material corresponding to a temperature of 20 °C and a relative humidity of 65 %. Properties not required for specific board types are marked “—“. The requirements relating to formaldehyde potential (perforator value) shall be met by the 95 percentile value based on test values of individual boards. The 95 percentile value shall be equal to or less than the value given in Table 1.
4 Verification of compliance 4.1 General Verification of compliance with this European Standard shall be carried out using the test methods listed in Table 1. 4.2 External control External control of the factory, if any, shall be carried out according to EN 326-2. The inspection of a consignment of panels shall be carried out according to EN 326-3. In the case of formaldehyde potential determined by EN 120 perforator method, however, for both external control and inspection of a consignment of panels, the respective requirements set out in Table 1 shall be the arithmetic mean value of at least three boards. Additionally, no individual board shall exceed an upper tolerance limit of + 10%. 4.3 Factory production control Factory production control shall be carried out according to EN 326-2. The properties listed in Tables 1 and 2 shall be controlled, using intervals between tests not exceeding those given in Table 3. Sampling shall be carried out at random. Alternative test methods and/or unconditioned test pieces may be used if a valid correlation to the specified test methods can be proven. The intervals between tests given in Table 3 are related to a production under statistical control.BS EN 622-1 pdf download.