ISO 13747 pdf download.Textile floor coverings — Determination of size, squareness and straightness of edge of tiles
1 Scope
This International Standard specifies methods for the determination of size, squareness and straightness of edge of textile floor covering tiles and is applicable to tiles of all types of construction, maximum thickness 1 5 mm, and for all methods of installation, e.g. loose laid or adhered.
2 Normative reference
The following normative document contains provisions which, through reference in this text, constitute provisions of this International Standard. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent edition of the normative document indicated below. For undated references, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain registers of currently valid International Standards. ISO 1 39:1 973, Textiles — Standard atmospheres for conditioning and testing.
3 Principle
Dimensions of the tiles are measured using apparatus such as micrometer gauges, and straightness of edge is determined using feeler gauges.
4 Apparatus
4.1 Rigid, durable, smooth and waterproof baseboard, e.g. of metal or marine plywood coated with a plastics laminate The base plate shall be of a size suitable to accommodate the test specimen. Two stop bars, approximately 25 mm wide and 1 5 mm high, are fitted at right angles along two adjacent sides with a gap of approximately 1 mm at the corner. On each of the two opposite sides, two cut-outs or slots are made approximately 20 mm wide and at least 20 mm long, to accommodate the presser feet of the dial gauge micrometers. The slots are positioned at 1 /3 and 2/3 of the nominal test specimen size (length of side) from the stop bars and are required to allow the presser feet to move ? 1 0 mm from the nominal size of the test specimen (see Figure 1 ). 4.2 Four dial gauge micrometers Each micrometer shall have a 20 mm diameter presser foot, a traverse of ? 20 mm and be capable of measuring to 0,1 mm with an operating force of between 0,5 N and 1 N. The gauges are mounted centrally within the cut-outs or slots with their axes in a horizontal plane and so that their centres are 5 mm above the level of the base. A means of holding the dial gauge presser foot shafts in their maximum position is required. A suitable apparatus is shown in Figures 1 and 2.4.4 Square flatplates The flatplates for covering the test specimens during the test shall be 1 0 mm smaller than the nominal test specimen size and of mass approximately 5 kg/m 2 . 4.5 Feeler gauges The feeler gauges shall have a nominal width of 5 mm and be capable of measuring in the range 0,2 mm to 2 mm. 4.6 Other means of measuring the dimensions Other means of measuring the dimensions may be used provided they meet the accuracy requirements of 4.2.
5 Atmosphere for conditioning and testing
The conditioning and testing atmosphere shall be the standard atmosphere for testing textiles defined in ISO 1 39, i.e. an atmosphere of (65 ? 2) % relative humidity .
6 Sampling and selection of test specimens
Sampling of test specimens shall be as agreed between the parties involved in the test. At least three specimens shall be tested unless otherwise agreed between the parties involved in the test. A single whole tile is regarded as one test specimen. Test specimens shall be allowed to condition laid flat singly, use surface uppermost, in the standard atmosphere for testing textiles as defined in clause 5. They shall be kept in this atmosphere firstly for at least 48 h, and then either to constant mass or for a further period of 48 h. Wherever possible, the direction of manufacture shall be identified. All measurements shall be made with reference to this, and the sides shall be marked A, B, C, D, as shown in Figure 3. If the direction of manufacture cannot be identified, an arbitrary identification of direction and related sides shall be made.