1、 Collection of SANS standards in electronic format (PDF) 1. Copyright This standard is available to staff members of companies that have subscribed to the complete collection of SANS standards in accordance with a formal copyright agreement. This document may reside on a CENTRAL FILE SERVER or INTRA
2、NET SYSTEM only. Unless specific permission has been granted, this document MAY NOT be sent or given to staff members from other companies or organizations. Doing so would constitute a VIOLATION of SABS copyright rules. 2. Indemnity The South African Bureau of Standards accepts no liability for any
3、damage whatsoever than may result from the use of this material or the information contain therein, irrespective of the cause and quantum thereof. ISBN 978-0-626-22398-4 SANS 540-1:2009 Edition 4.1 Any reference to SABS 540-1 is deemed to be a reference to this standard (Government Notice No. 1373 o
4、f 8 November 2002)SOUTH AFRICAN NATIONAL STANDARD Fibreboard products Part 1: Uncoated fibreboard Published by SABS Standards Division 1 Dr Lategan Road Groenkloof Private Bag X191 Pretoria 0001 Tel: +27 12 428 7911 Fax: +27 12 344 1568 www.sabs.co.za SABS This standard may only be used and printed
5、by approved subscription and freemailing clients of the SABS.SANS 540-1:2009 Edition 4.1 Table of changes Change No. Date Scope Amdt 1 2009 Amended to change the designation of SABS standards to SANS standards, to update the definition of “acceptable”, to change the requirements for thickness swelli
6、ng and water absorption and internal bond strength, to update referenced standards, and to remove reference to the certification mark. Foreword This South African standard was approved by National Committee SABS SC 1008B, Wood and associated products Reconstituted timber, in accordance with procedur
7、es of the SABS Standards Division, in compliance with annex 3 of the WTO/TBT agreement. This document was published in February 2009. This document supersedes SABS 540-1:1991 (third revision). A vertical line in the margin shows where the text has been technically modified by amendment No. 1. Annex
8、A (Quality verification of uncoated fibreboard) and annex B (Notes to purchasers) form an integral part of this part of this document. Annex C (Preferred dimensions) and annex D (Notes on the storage and handling of uncoated fibreboards) are for information only. Preface SABS 540:1971 was revised to
9、 update the contents in accordance with the latest capabilities of the industry. At the same time, the contents were extended to include requirements for coated boards. The test methods were removed from the original standard and have now been published as separate standards. To ensure more reliable
10、 test results, standard cutting plans were developed and are included in the test standards. This standard may only be used and printed by approved subscription and freemailing clients of the SABS.SANS 540-1:2009 Edition 4.1 1 Contents Page Foreword Preface 1 Scope 3 2 Normative references. 3 3 Defi
11、nitions . 4 4 Requirements 4 5 Packing and marking . 10 6 Inspection and methods of test 10 6.1 Inspection. 10 6.2 Dimensions 11 6.3 Squareness . 11 6.4 Straightness of edges and ends 11 6.5 Density 11 6.6 Modulus of elasticity and modulus of rupture . 11 6.7 Thickness swelling and water absorption
12、. 11 6.8 Internal bond strength 11 6.9 Linear expansion . 11 6.10 Thermal conductivity 11 6.11 Bitumen content . 11 6.12 Lateral nail-holding strength . 11 6.13 Screw-holding strength 12 6.14 Flatness . 12 Annex A Quality verification of uncoated fibreboard 13 Annex B Notes to purchasers 15 Annex C
13、Preferred dimensions 15 Annex D Notes on the storage and handling of uncoated fibreboards . 17 This standard may only be used and printed by approved subscription and freemailing clients of the SABS.SANS 540-1:2009 Edition 4.1 2 This page is intentionally left blank This standard may only be used an
14、d printed by approved subscription and freemailing clients of the SABS.SANS 540-1:2009 Edition 4.1 3 Fibreboard products Part 1: Uncoated fibreboard 1 Scope This part of the SANS 540 specifies the characteristics of uncoated fibreboard. 2 Normative references The following standards contain provisio
15、ns that, through reference in this text, constitute provisions of this part of SANS 540. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this part of SANS 540 are encouraged to investigate the possibility of app
16、lying the most recent editions of the standards indicated below. Information on currently valid national and international standards can be obtained from the SABS Standards Division. ASTM C 177, Standard test method for steady-state heat flux measurements and thermal transmission properties by means
17、 of the guarded-hot-plate apparatus. ASTM C 518, Standard test method for steady-state thermal transmission properties by means of the heat flow meter apparatus. SABS 0157-1:1987, Quality systems Part 1: Model for quality assurance in design/development, production, installation and servicing. Amdt
18、1 SABS 0157-2:1987, Quality Systems Part 2: Model for quality assurance in production and installation. Amdt 1 SABS 0157-3:1987, Quality Systems Part 3: Model for quality assurance in final inspection and test. Amdt 1 SANS 2859-1/ISO 2859-1, Sampling procedures for inspection by attributes Part 1: S
19、ampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection. Amdt 1 SANS 5817, Timber-based board products Squareness. SANS 5969, Flatness of wooden board products. SANS 5970, Edge straightness of wooden board products. SANS 6012, Thickness swelling and water absorption of fi
20、breboards on immersion in water. This standard may only be used and printed by approved subscription and freemailing clients of the SABS.SANS 540-1:2009 Edition 4.1 4 SANS 6015, Modulus of elasticity and modulus of rupture in static bending of fibreboards. SANS 6016, Transverse tensile (internal bon
21、d) strength of wood-based panels. SANS 6018, Screw-holding strength of wood-based panels. SANS 6174, Fibreboard Measurement of dimensions of test specimens. SANS 6175, Fibreboard Determination of density. SANS 6176, Fibreboard Determination of linear expansion as a result of water absorption. SANS 6
22、177, Insulation board Determination of bitumen content. SANS 6178, Fibreboard Determination of lateral nail-holding strength. 3 Definitions For the purposes of this part of SANS 540, the following definitions apply: 3.1 acceptable acceptable to the authority administering this standard or to the par
23、ties concluding the purchase contract, as relevant Amdt 1 3.2 fibreboard board a board produced from fibred ligno-cellulose material with or without the use of bonding agents 3.3 MDF fibreboard of density in the range 550 kg/m 3to 940 kg/m 3and manufactured by a wet or dry process from ligno-cellulo
24、se fibres with or without a resin binder 3.4 sanded board a board that has a sanded face or screen (or both) 4 Requirements 4.1 General requirements 4.1.1 Type Fibreboard shall be of one of the following types (see also tables 1 to 3), as required: a) insulation board: fibreboard of density not exce
25、eding 400 kg/m 3 ; b) MDF: 1) low density MDF: MDF of density in the range 550 kg/m 3to 620 kg/m 3 ; 2) medium density MDF: MDF of density in the range 621 kg/m 3to 780 kg/m 3 ; 3) high density MDF: MDF of density in the range 781 kg/m 3to 940 kg/m 3 ; This standard may only be used and printed by a
26、pproved subscription and freemailing clients of the SABS.SANS 540-1:2009 Edition 4.1 5 c) motorboard: fibreboard of density in the range 850 kg/m 3to 940 kg/m 3and that is capable of being shaped or bent or both (mainly used in the motor industry); d) standard hardboard: fibreboard of density exceed
27、ing 940 kg/m 3 ; e) standard mediumboard: fibreboard of density in the range 800 kg/m 3to 940 kg/m 3 ; f) tempered hardboard: standard hardboard that has been specially treated (during the manufacturing process) in order to improve its mechanical properties; g) tempered mediumboard: standard mediumb
28、oard that has been specially treated (during the manufacturing process) in order to improve its mechanical properties; or h) weatherboard: fibreboard of density exceeding 800 kg/m 3and mainly used as cladding in exterior conditions. 4.1.2 Appearance The face of a board shall be of acceptable appeara
29、nce. 4.1.3 Dimensions When measured in accordance with 6.2, the dimensions of a board (other than motorboard) shall conform to the values given in table 1. (See annex C for industry preferred dimensions of various types of fibreboard.) 4.1.4 Squareness When determined in accordance with 6.3, the dif
30、ference in length of diagonals of a board shall not exceed 1,5 mm/m. 4.1.5 Straightness of edges and ends When determined in accordance with 6.4, the maximum deviation from absolute straightness of the edges and ends of a board shall not exceed 1 mm per 1 200 mm of length. 4.1.6 Flatness When determ
31、ined in accordance with 6.14, the deviation from absolute flatness at any position in a board shall not exceed 5 mm/m in the case of boards of nominal thickness less than 25 mm, and 3 mm/m in other cases. 4.1.7 Defects not allowed The following defects are not permitted: a) foreign matter: boards sh
32、all be free from foreign matter since it may cause damage to tools or adversely affect the properties of the boards; b) delamination: boards shall be free from any visible sign of delamination; c) mechanical damage: boards shall be free from any mechanical damage that may affect the dimensions, the
33、appearance or the strength (or any combination of these three) of a board. This standard may only be used and printed by approved subscription and freemailing clients of the SABS.Table 1 Dimensions and tolerances Dimensions in millimetres 1 2 3 4 5 6 7 8 Length Width Thickness Type Dimension Toleran
34、ce (All types except motorboard) Dimension Tolerance (All types except motorboard) Dimension Tolerance between and within boards Sanding tolerance 1) Hardboard (std and tempered) 2,5 3,2 4,0 0,4 0,4 0,4 0,2 0,2 0,2 4,8 6,4 7,9 9,5 12,7 0,4 0,5 0,7 0,8 0,8 Medium board (std and tempered) All sizes +1
35、2 3All sizes +5 34,0 4,8 6,4 0,4 0,4 0,5 0,2 Weatherboard 4,8 6,4 9,5 0,4 0,5 0,8 Insulation board 10 13 19 0,7 0,7 1,0 MDF 32 0,7 0,7 1,0 1,0 0,3 0,3 0,3 0,3 1) Tolerances for sanded board are applicable to nominal dimensions. NOTE The dimensions and tolerances of motorboard shall be as required. 6
36、 SANS 540-1:2009 Edition 4.1 This standard may only be used and printed by approved subscription and freemailing clients of the SABS.SANS 540-1:2009 Edition 4.1 7 4.2 Physical requirements 4.2.1 Requirements for fibreboard other than MDF When tested in accordance with the appropriate test method giv
37、en in column 11 of table 2, fibreboard (other than MDF) shall comply with the relevant requirements given in columns 3 to 10. 4.2.2 Requirements for MDF When tested in accordance with the appropriate test method given in column 4 of table 3, MDF shall comply with the appropriate requirements given i
38、n column 3. This standard may only be used and printed by approved subscription and freemailing clients of the SABS.Table 2 Physical requirements for fibreboard 1 2 3 4 5 6 7 8 9 10 11 Requirement Thickness Hardboard Medium board Property mm Std Tempered Std Tempered Insulation board Bitumen insulat
39、ion board Motorboard Weather board Test method subclause Density, kg/m3 All 940 960 800 to 960 800 6.5 2,5 3,2 38 38 50 50 32 32 40 40 32 Modulus of rupture, MPa, min. 4,0 4,8 6,4 7,9 9,5 12,7 38 38 38 38 38 38 50 50 50 50 50 50 32 32 32 32 32 32 40 40 35 35 35 35 35 35 35 6.6 10 13 19 2,0 2,0 2,0 2
40、,2 Water absorption, %, max. (24 h immersion) 2,5 3,2 4,0 4,8 6,4 7,9 9,5 12,5 32 30 24 21 16 16 15 15 24 20 15 13 13 13 35 32 26 23 18 18 18 18 32 30 24 21 16 16 15 15 30 21 16 15 6.7 Water absorption, %, max. (2 h immersion) 10 13 19 3 5 30 23 30 1) Because of the addition of bitumen, the density
41、increases. 8 SANS 540-1:2009 Edition 4.1 This standard may only be used and printed by approved subscription and freemailing clients of the SABS.Table 2 (continued) 1 2 3 4 5 6 7 8 9 10 11 Requirement Thickness Hardboard Medium board Property mm Std Tempered Std Tempered Insulation board Bitumen ins
42、ulation board Motorboard Weather board Test method subclause Thickness swelling, %, max. (24 h immersion) 2,5 3,2 4,0 4,8 6,4 7,9 9,5 12,7 22 18 16 16 14 12 10 10 16 16 14 12 10 10 25 22 20 20 18 16 14 14 22 20 18 18 16 14 12 12 22 14 12 8 6.7 Internal bond strength, MPa, min. All 0,70 1,00 0,70 0,6
43、0 0,70 6.8 Linear expansion, %, max. All 0,25 0,25 0,25 0,50 0,30 6.9 Thermal conductivity, W/m C, max. 10 13 19 0,06 0,06 0,06 6.10 Bitumen content, %, min. 10 13 1 2 16 6.11 Lateral nail-holding strength, N/mm, min. 2,5 3,2 100 120 100 6.12 1) Because of the addition of bitumen, the density increa
44、ses. 9 SANS 540-1:2009 Edition 4.1 This standard may only be used and printed by approved subscription and freemailing clients of the SABS.SANS 540-1:2009 Edition 4.1 10 Table 3 Requirements for MDF 1 2 3 4 Thickness Property mm Requirement Test method subclause Density, kg/m3 All 550 to 940 6.5 Mod
45、ulus of rupture, MPa, min. 22 35 30 25 6.6 Modulus of elasticity, MPa, min. 22 2 000 Water absorption, %, max. (24 h immersion) All 8 6.7 Thickness swelling, %, max. (24 h immersion) All 12 6.7 Internal bond strength, MPa, min. All 0,50 6.8 Linear expansion, %, min. All 0,3 6.9 Screw-holding strengt
46、h, N, min. on a face on an edge 12 12 1 100 900 6.13 5 Packing and marking 5.1 Packing Uncoated fibreboard shall be so packed that it is protected against damage during normal transportation, storage and handling. 5.2 Marking Each board shall bear at least the following information in legible and in
47、delible marking on the board or on a label securely fixed to each board: a) the manufacturers name, trade name or trademark; b) the nominal dimensions; c) the type of board; d) the date of manufacture. NOTE Where boards are to be delivered in crates, only the crate itself need be appropriately marke
48、d with the information required above. 6 Inspection and methods of test 6.1 Inspection Visually inspect each board in the sample for compliance with those requirements of this part of SANS 540 for which tests to assess compliance are not given in 6.2 to 6.14 (inclusive). This standard may only be us
49、ed and printed by approved subscription and freemailing clients of the SABS.SANS 540-1:2009 Edition 4.1 11 6.2 Dimensions Use SANS 6174 to measure the thickness of a board. To measure the length and width of a board, use a calibrated steel tape or rule of length at least 6 m and calibrated in millimetres. Check for compliance with 4.1.3. 6.3 Squareness Use SANS 5817. Check for compliance with 4.1.4. 6.4 Straightness of edges and ends Use SANS 5970. Check for compliance with 4.1.5. 6.5
