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 978-0-626-20332-0 SANS 92:2008Edition 5.1Any reference to SABS 92 is deemedto be a reference to this standard(Government Notice No. 1373 of 8 Novemb
4、er 2002)SOUTH AFRICAN NATIONAL STANDARD Bituminous roofing felt Published by Standards South Africa 1 dr lategan road groenkloof private bag x191 pretoria 0001 tel: 012 428 7911 fax: 012 344 1568 international code + 27 12 www.stansa.co.za Standards South Africa SANS 92:2008 Edition 5.1 Table of cha
5、nges Change No. Date Scope Amdt 1 2008 Amended to change the designition of SABS standards to SANS standards and to remove reference to the standardization mark. Acknowledgement Standards South Africa wishes to acknowledge the valuable assistance derived from publications of the following organizati
6、ons: American Society for Testing and Materials Institute of Petroleum (UK) Foreword This South African standard was approved by National Committee StanSA TC 5120.61, Construction standards, in accordance with procedures of Standards South Africa, in compliance with annex 3 of the WTO/TBT agreement.
7、 This document was published in March 2008. This document supersedes SABS 92:1981 (edition 5). A vertical line in the margin shows where the text has been technically modified by amendment No. 1. Preface This specification has been revised to incorporate requirements for tear strength, resistance to
8、 blistering, and dimensional stability and to amend the methods for the determination of pliability and resistance to weathering. SANS 92:2008 Edition 5.1 1 Contents Pages Ackknowledgement Foreword Preface 1 Scope . 3 2 Definitions 3 3 Materials . 4 4 Requirements for the product 5 5 Packing and mar
9、king . 7 6 Sampling and compliance with the specification . 7 7 Inspection and methods of test 8 7.1 Inspection . 8 7.2 Mass per 18 m28 7.3 Test specimens 8 7.4 Total bitumen content . 10 7.5 Mass per unit area of moisture- and bitumen-free felt . 12 7.6 Pliability 12 7.7 Veining . 13 7.8 Ash conten
10、t of moisture- and bitumen-free felt 13 7.9 Heat resistance 13 7.10 Resistance to weathering . 14 7.11 Tear strength 14 7.12 Saturation test 15 7.13 Unrolling test 15 7.14 Resistance to blistering test . 15 7.15 Dimensional stability 16 7.16 Contact compatibility of coating and saturant bitumens 17
11、7.17 Softening point of coating and saturant bitumens . 17 Appendix A Applicable standards 18 Appendix B Notes to purchasers . 18 SANS 92:2008 Edition 5.1 2 This page is intentionally left blank SANS 92:2008 Edition 5.1 3 Bituminous roofing felt 1 Scope 1.1 This specification covers the following tw
12、o types of bituminous roofing felt suitable for use in waterproofing and in the construction of built-up roofs: Type 40 : of net mass at least 41,0 kg/18 m2roll Type 60 : of net mass at least 57,0 kg/18 m2roll NOTE a) The standards referred to in the specification are listed in appendix A. b) Requir
13、ements that must be specified by the purchaser are listed in appendix B. c) Assessment of compliance with the requirements for the coating and the saturant bitumens (see 3.2) and the mineral filler (see 3.3) requires special agreement between the purchaser and the supplier with regard to the samplin
14、g procedure to be used. Amdt 1 d) A built-up roof shall be suitably protected from vehicular and pedestrian traffic in accordance with the relevant recommendations given in SANS 10021. 2 Definitions 2.1 For the purposes of this specification the following definitions shall apply: alligatoring a defe
15、ct characterized by cracks in the surface layer resembling the marks on the hide of an alligator NOTE Alligatoring may begin as checks or cracks, but the breaks tend to grow wider at the bottom as well as at the top, thus exposing parts of the base. In extreme cases of alligatoring, the islands of c
16、oating between interlacing breaks contract in area, and consequently increase in thickness and often become wrinkled. ASTM method a test method published by the American Society for Testing and Materials, 1916 Race Street, Philadelphia, Pa 19103, USA bitumen a non-crystalline solid or viscous mixtur
17、e of complex hydrocarbons that possesses characteristic agglomerating properties, softens gradually whenever heated, is substantially soluble in trichlorethylene, and is obtained from crude petroleum by refining processes SANS 92:2008 Edition 5.1 4 coating bitumen bitumen used in the manufacture of
18、the coating compound coating compound a mixture of bitumen (or compounded bitumen) and mineral filler used for coating the saturated felt defective a roll or a test sample of roofing felt that fails, in one or more respects, to comply with the relevant requirements of the specification IP method a t
19、est method published by the Institute of Petroleum, 61 New Cavendish Street, London, W1M 8AR, England lot not more than 1 000 rolls of roofing felt of the same type, bearing the same batch identification, from one manufacturer, and submitted at any one time for inspection and testing saturant bitume
20、n used (during the manufacture of the roofing material) to saturate the fibre felt before the coating compound is applied weather side the side of a roofing felt that is intended to be exposed to the weather and which is the upper side when a roll of the material is unrolled in the normal manner 3 M
21、aterials 3.1 Fibre felt 3.1.1 General The fibre felt shall be in the form of an absorbent sheet produced by felting vegetable or animal fibres or mixtures of these fibres. The surface of the felt shall be uniformly smooth, and when split or torn on the bias it shall be free from lumps, underbeaten s
22、tock, and particles of foreign substances. 3.1.2 Mass per unit area of moisture- and bitumen-free felt The mass per unit area of the moisture- and bitumen-free felt, determined in accordance with 7.5, shall be 400 20 g/m2. 3.1.3 Ash content The ash content of the moisture- and bitumen-free felt, det
23、ermined in accordance with 7.8, shall not exceed 5 % (m/m). 3.2 Coating and saturant bitumens 3.2.1 Contact compatibility When the coating and the saturant bitumens are tested in accordance with 7.16, the width of the ring formed shall not exceed 0,5 mm. SANS 92:2008 Edition 5.1 5 3.2.2 Softening po
24、int When the coating and the saturant bitumens are tested in accordance with 7.17, their softening points shall be as follows: Softening point (ring and ball), C Coating bitumen 95-115 Saturant bitumen 40- 60 3.3 Mineral filler The filler used in the coating compound shall be a finely powdered, wate
25、r-insoluble mineral filler, and it shall not exceed 40 % (m/m) of the coating compound. 3.4 Surfacing material The surfacing material shall consist of a fine sand, mica, a mixture of mica and sand, talc, aluminium particles, or a similar medium that is reflective or protective or both. 4 Requirement
26、s for the product 4.1 General a) The roofing felt shall consist of an absorbent sheet of fibre felt (see 3.1) saturated with saturant, coated on both sides with coating compound, and surfaced on both sides with surfacing material. b) The coating compound on each side of the saturated fibre base shal
27、l have been uniformly applied, shall extend to each edge of the sheet, and shall be free from defects such as blisters and lumps. c) The surfaces of the roofing felt shall be smooth or finely veined in appearance and, when determined in accordance with 7.7, the average of the differences between the
28、 heights of ridges and the depths of valleys (i.e. veining) on the same side of the roofing felt shall not exceed 250 m. d) The roofing felt shall be free from visible defects such us uncoated areas, holes, ragged or untrue edges, breaks, cracks, tears, protuberances, and indentations. e) When a rol
29、l of the roofing felt is tested in accordance with 7.13, the felt shall not become so tacky that unrolling causes tearing or other material damage. 4.2 Type and mass per 18 m2Roofing felt shall be of type 40 or 60, as specified by the purchaser, and its mass per 18 m2, determined in accordance with
30、7.2, shall be at least equal to the appropriate of the following minima: Type Mass/18 m2, kg, min. 40 41,0 60 57,0 SANS 92:2008 Edition 5.1 6 4.3 Dimensions 4.3.1 Width The width of the roofing felt shall be uniform, and, unless otherwise specified by the purchaser, the nominal width shall be 900 mm
31、. The actual width, determined in accordance with 7.1, shall not differ from the nominal value by more than 6 mm in the case of roofing felt of nominal width 900 mm or more, and by more than 3 mm in the case of roofing felt of nominal width less than 900 mm. 4.3.2 Length Unless otherwise specified b
32、y the purchaser, the nominal length of roofing felt in a roll shall be 20 m. The actual length, determined in accordance with 7.1, shall be at least equal to the nominal value. The roofing felt in a roll shall be in one continuous length or, provided that the length of the shorter piece is at least
33、5 m, may consist of not more than two pieces. 4.4 Total bitumen content The mass of bitumen per unit area of the roofing felt, determined in accordance with 7.4, shall be at least equal to the appropriate of the following minima: Type Bitumen content, g/m2of felt, min. 40 1 175 60 1 670 4.5 Saturati
34、on The felt shall be thoroughly and uniformly saturated with bitumen and, when tested in accordance with 7.12, no unsaturated spot(s) shall be visible. 4.6 Pliability at 25 C and 10 C When tested in accordance with 7.6, the roofing felt shall show no signs of surface rupture. 4.7 Heat resistance Whe
35、n tested in accordance with 7.9, the roofing felt shall show no flowing, sagging, blistering, or formation of hollows in the bituminous coating, and any loss in mass shall not exceed 1,0 % (m/m). 4.8 Resistance to weathering After being exposed, in accoradance with 7.10, to 15 consecutive weathering
36、 cycles, no test specimen shall show any visible (to the unaided eye) development of alligatoring, cracking, blistering, cratering, bleeding, sagging, or local surface damage. 4.9 Tear strength The tear strengths of the roofing felt, determined in accordance with 7.11, shall be at least 15 N. 4.10 R
37、esistance to blistering When tested in accordance with 7.14, the test specimens shall show no signs of blistering or local surface damage. SANS 92:2008 Edition 5.1 7 4.11 Dimensional stability When the test specimens are tested in accordance with 7.15, the dimensional change (measured in the machine
38、 direction, i.e. lengthwise) shall not exceed 0,15 %. 5 Packing and marking 5.1 Packing The roofing felt shall be supplied in rolls (weather side inwards) having an internal diameter of at least 75 mm, and each roll shall be securely wrapped in a substantial grade of paper of the same width as the r
39、oll. The paper shall completely encircle the roll and shall be so secured that it does not move relative to the roll. 5.2 Marking The following information shall appear in legible and indelible marking on the wrapping of each roll or on a label securely attached to the roll: a) the manufacturers ide
40、ntification; b) a description (that includes the type, and the nominal length and nominal width of the roll) of the product; c) the batch identification; d) when relevant, a statement to the effect that the roll contains two pieces. 6 Sampling and compliance with the specification NOTE This section
41、applies to the sampling for inspection and testing before acceptance or rejection of single lots (consignments) in cases where no information about the implementation of quality control or testing during manufacture is available to help in assessing the quality of the lot. It is also used as the pro
42、cedure for adjudicating in cases of dispute. 6.1 Sampling The following sampling procedure shall be applied in determining whether a lot complies with the appropriate requirements of the specification. The samples so drawn shall be deemed to represent the lot for the respective properties. 6.1.1 Sam
43、ples for inspection a) First sample. From the lot draw at random 5 rolls. b) Second sample. If, on inspection (see 7.1) of the sample drawn in accordance with (a) above, one defective is found, draw at random from the lot a further 10 rolls for inspection and measurement as before. 6.1.2 Samples for
44、 testing a) For the unrolling test (see 7.13). Take at random from the lot one roll. b) For the other tests SANS 92:2008 Edition 5.1 8 1) First sample. From the sample taken in accordance with 6.1.1 draw at random four rolls (but, when relevant, do not take the roll that contained the defects) and f
45、rom each roll so drawn cut a full-width rectangular test sample of area at least 1,3 m2from a position at least 3 m from the outer end of each roll. Mark the weather (inner) side of each test sample and also mark on it the batch identification, and then pack the samples flat between supports that ar
46、e wide and stiff enough to protect them from damage in transit. Use two of the test samples as the first sample for testing, and reserve the other two for use, when relevant, as in (2) below. 2) Second sample. If, on testing of the first sample (see (1) above), one defective is found, use the remain
47、ing two test samples as the second sample for testing for compliance with the requirement(s) with which the defective failed to comply. 6.2 Compliance with the specification The lot shall be deemed to comply with the requirements of the specification if, a) on inspection, no defective is found in th
48、e first sample for inspection (see 6.1.1(a) or, when relevant, no defective is found in the second sample for inspection (see 6.1.1(b); and b) on testing, 1) the sample taken in accordance with 6.1.2(a) is found to comply with the requirements of 4.1(e), and 2) of the sample(s) taken in accordance w
49、ith 6.1.2(b), no defective is found in the first sample or, when relevant, no defective is found in the second sample. 7 Inspection and methods of tests 7.1 Inspection After checking each roll in the sample taken in accordance with 6.1.1(a) and, when relevant, 6.1.1(b) for compliance with the requirements of section 5, unwrap each roll, shake off any loose surfacing material, remove the core (if present), and determine its mass to the nearest 0,1 kg . Then, for each roll, unroll the piece(s), measure the maximum and minimum widths to the nearest 1 mm and check for compliance with
