BS EN 1279-2:2018 pdf download

BS EN 1279-2:2018 pdf download

BS EN 1279-2:2018 pdf download.Glass in building – Insulating glass units
1 Scope
This document describes the test method for the determination of moisture penetration index and specifies the requirements for limit values for insulating glass units made
a) in accordance with EN 1279-1:2018 and manufactured to EN 1279-6:2018; or
b) for the purpose to demonstrate that components (e.g. edge seals or spacers) will allow the insulating glass unit to conform to the requirements given in EN 1279-1:2018, Clause 6.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
EN 1279-1:2018, Glass in Building一Insulating glass units一Part 1: Generalities, system description, rules for substitution, tolerances and visual quality
EN 1279-4:2018, Glass in Building 一Insulating glass units一Part 4: Methods of test for the physical attributes of edge seal components and inserts
EN 1279-6:2018, Glass in Building一Insulating glass units一Part 6: Factory production control and periodic tests
5 Requirements
Average moisture penetration index (lav) and moisture penetration index (I) shall be determined in accordance with Clause 6. The average moisture penetration index (lav) of five test specimens shall not exceed 0,20 [or 20 %). The moisture penetration index of any test specimen shall not exceed 0,25 (or 25 %).
6 Method of long-term test
6.1 Principle
Insulating glass unit [IGU) specimens are exposed to a climate test. The initial and final moisture content of the desiccant are determined. I values for each unit tested and lav value are calculated for each unit tested.
6.2 Number, description and selection of test specimens
15 test specimens which shall be representative of the system description (see EN 1279-1:2018, Annex A], and shall consist of two panes of 4 mm glass in accordance with EN 1279-1:2018, 5.2. If 4 mm glass is not available, the thickness as near as possible to 4 mm shall be used. The length shall be (502+2) mm and the width shall be (352+2) mm. The cavity width shall be 12 mm, or if not : manufactured, the cavity width shall be as near as possible to 12 mm. Specimens of triple glazed units may also be tested. Length, width and cavity width should fulfil the above mentioned requirements. The I-value of the individual cavities may be different. The requirement given in Clause 5 applies to both individual cavities. After production, the test specimens shall be stored for fourteen days and additionally conditioned for a minimum of three days at standard laboratory conditions. Number the specimens by random selection. Select the specimens as indicated in Table 1.