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 978-0-626-21745-7 SANS 1255:2009Edition 2SOUTH AFRICAN NATIONAL STANDARD Oven cleaner and grease remover Published by SABS Standards Division 1 Dr L
4、ategan Road Groenkloof Private Bag X191 Pretoria 0001Tel: +27 12 428 7911 Fax: +27 12 344 1568 www.sabs.co.za SABS SANS 1255:2009 Edition 2 Table of changes Change No. Date Scope Foreword This South African standard was approved by National Committee SABS SC 1006B, Detergents, polishes and other che
5、micals Detergents, soaps and cleaners, in accordance with procedures of the SABS Standards Division, in compliance with annex 3 of the WTO/TBT agreement. This document was published in January 2009. This document supersedes SABS 1255:1985 (edition 1). A reference is made in 6.2 to “national regulati
6、ons and statutory requirements“. In South Africa, this means the Foodstuffs, Cosmetics and Disinfectants Act, 1972 (Act No. 54 of 1972), the Trade Metrology Act, 1973 (Act No. 77 of 1973) and the National Road Traffic Act, 1996 (Act No. 93 of 1996) (as amended from time to time). Annex A forms an in
7、tegral part of this document. Annex B is for information only. SANS 1255:2009 Edition 2 1 Contents Page Foreword 1 Scope 3 2 Normative references . 3 3 Definitions . 3 4 Requirements 4 5 Inspection and methods of test 5 5.1 General . 5 5.2 Inspection 5 5.3 Preparation of type 3 test specimens . 5 5.
8、4 Free alkali content . 6 5.5 Viscosity at 25 C 6 5.6 Flash point . 6 5.7 Water-insoluble matter content 7 5.8 Cleaning efficiency . 7 6 Packing and marking . 9 Annex A (normative) Note to purchasers 11 Annex B (informative) Quality verification of oven cleaner and grease remover . 11 Bibliography.
9、11 SANS 1255:2009 Edition 2 2 This page is intentionally left blank SANS 1255:2009 Edition 2 3 Oven cleaner and grease remover 1 Scope This standard covers three types of oven cleaners and grease removers that are suitable for the removal of carbon deposits, grease, baked-on fats and other surface c
10、ontaminants from industrial and domestic cooking ovens, grills, fryers and other steel kitchen equipment, but that are not intended for use in self-cleaning ovens. As type 1 and type 2 oven cleaners may contain solvents that are detrimental to health, it is recommended that these cleaners be used in
11、 well-ventilated areas and that prolonged breathing of the vapours be avoided. Oven cleaners that contain solvents in a quantity that is detrimental to health are not recommended for domestic use. 2 Normative references The following referenced documents are indispensable for the application of this
12、 document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. Information on currently valid national and international standards can be obtained from SABS Standards Division. ASTM D93, Stand
13、ard test methods for flash point by Pensky-Martens closed cup tester. SANS 1675 (SABS 1675), The manufacture, production, processing and treatment of canned meat products. SANS 1875, Edible oils. SANS 5126, Viscosity of binders for paints. SANS 10229-1, Transport of dangerous goods Packaging and lar
14、ge packaging for road and rail transport Part 1: Packaging. 3 Definitions For the purposes of this document, the following definitions apply. batch material from a single mix cleaner, oven cleaner and grease remover SANS 1255:2009 Edition 2 4 4 Requirements 4.1 Type The cleaner shall be of one of th
15、e following types: Type 1. A cleaner that is applied by spraying by means of a mechanically operated pump, onto cold or hot (approximately 80 C) surfaces. Type 2. A cleaner that is applied by brushing, or by spraying by means of a mechanically operated pump, onto cold or hot (approximately 80 C) sur
16、faces. Type 3. A cleaner that is applied by spraying from an aerosol container onto cold or hot (approximately 80 C) surfaces. 4.2 General properties 4.2.1 Type 1. When inspected in accordance with 5.2, a type 1 cleaner shall be a homogeneous, free-flowing liquid and may be coloured. It shall contai
17、n no chlorinated hydrocarbons. 4.2.2 Type 2. When inspected in accordance with 5.2, a type 2 cleaner shall be a homogeneous liquid of the prescribed viscosity and may be coloured. It shall contain no chlorinated hydrocarbons. 4.2.3 Type 3. When inspected in accordance with 5.2, a type 3 cleaner shal
18、l be a liquid that is mixed with a suitable propellant and is dispensed as an aerosol. 4.3 Odour and residual taste When inspected in accordance with 5.2, the cleaner shall not have an objectionable odour and shall not leave any residual odour or taste on the cleaned equipment. 4.4 Detrimental actio
19、n on surfaces When inspected in accordance with 5.2, the cleaner shall have no detrimental effect on porcelain, enamel, iron, stainless steel or ceramic surfaces when used in accordance with the manufacturers instructions. 4.5 Detailed requirements The cleaner shall comply with the relevant requirem
20、ents given in table 1. Table 1 Detailed requirements 1 2 3 4 5 Requirement Property Type 1 Type 2 Type 3 Test method subsection Free alkali content (as NaOH), g/L, max. 150,0 150,0 60,0 5.4 Viscosity at 25 C, mPas 550 max. 627 min. 5.5 Flash point, C, min. 90,0 90,0 5.6 Water-insoluble matter conten
21、t, g/L, max. 1,0 1,0 1,0 5.7 SANS 1255:2009 Edition 2 5 4.6 Cleaning efficiency When tested in accordance with 5.8, the cleaner shall clean at least as well as the standard cleaner. 4.7 Residue on vertical surfaces When the cleaner is applied to a vertical vitreous enamel surface, it shall leave an
22、uninterrupted residual film. 4.8 Shelf life 4.8.1 Types 1 and 2. After storage for 12 months in the original and unopened container under normal storage conditions, the cleaner shall show no sign of separation and, in the case of a type 1 cleaner, no precipitation, and shall still comply with all th
23、e relevant requirements of this standard. 4.8.2 Type 3. After storage for 12 months in an unused can under normal storage conditions, the cleaner shall still comply with all the relevant requirements of this standard and the can and the valve assembly shall show no visual evidence of having been cor
24、roded or damaged by the contents. 5 Inspection and methods of test 5.1 General Unless otherwise specified, use only distilled or de-ionized water and reagents of analytical reagent grade or (when such a grade is unobtainable) of the purest grade available. 5.2 Inspection Visually examine each contai
25、ner and, when applicable, the bulk packages in the sample for compliance with the relevant requirements of clause 6 and after reserving one unopened container for testing for compliance with 4.8, inspect a composite sample of the contents of the other containers (prepared, when applicable, in accord
26、ance with 5.3) for compliance with the requirements of 4.2, 4.3 and 4.4. 5.3 Preparation of type 3 test specimens 5.3.1 Use protective gloves and a face shield for the procedure in 5.3.2 and 5.3.3. 5.3.2 Using a suitable piercing tool and a hammer and holding the can in an upright position inside a
27、fume cupboard, pierce a tiny hole in the valve cap of the can. When most of the propellant has escaped, open the can and pour its contents into a wide-mouthed glass bottle. 5.3.3 Drive off the remaining propellant by placing the glass bottle on a steam-bath for approximately 2 h, and then close the
28、bottle and let it cool to ambient temperature. SANS 1255:2009 Edition 2 6 5.4 Free alkali content 5.4.1 Reagents 5.4.1.1 Freshly boiled ethanol that has a concentration of a volume fraction of 95 % and that, when tested at 70 C with a phenolphthalein indicator (see 5.4.1.3), shows no change in colou
29、r. 5.4.1.2 Barium chloride solution. Dissolve 10 g barium chloride (BaCl22H2O) in 100 mL water. Bring to the boil. Add 0,5 mL phenolphthalein indicator and neutralize the hot solution with a solution of sodium hydroxide (c (NaOH) is approximately 0,1 mol/L). 5.4.1.3 Phenolphthalein indicator. Dissol
30、ve 0,5 g phenolphthalein in 100 mL ethanol (see 5.4.1.1). 5.4.1.4 Standard hydrochloric acid solution, approximately 0,5 mol/L, that has been accurately standardized against anhydrous sodium carbonate. 5.4.2 Procedure 5.4.2.1 Measure approximately 100 mL water into an Erlenmeyer flask. Bring the wat
31、er to the boil and boil for approximately 2 min. 5.4.2.2 Pipette 10 mL of the test specimen into the boiling water and add, in a thin stream, 10 mL freshly neutralized barium chloride solution (see 5.4.1.2) and approximately 0,5 mL phenolphthalein indicator (see 5.4.1.3). 5.4.2.3 Remove from the sou
32、rce of heat and titrate the hot solution with the standard hydrochloric acid solution (see 5.4.1.4). 5.4.3 Calculation Calculate the free alkali content (Fac), expressed as sodium hydroxide in g/L, as follows: Fac= V x c 4,0 where V is the volume, in millilitres, of the standard hydrochloric acid so
33、lution used in the titration (see 5.4.2.3); c is the concentration, in mol per litre, of the standard hydrochloric acid solution (see 5.4.1.4). Check for compliance with table 1. 5.5 Viscosity at 25 C Use SANS 5126, but express the result in millipascal seconds. Check for compliance with table 1. 5.
34、6 Flash point Use ASTM D93. Check for compliance with table 1. SANS 1255:2009 Edition 2 7 5.7 Water-insoluble matter content 5.7.1 Apparatus 5.7.1.1 Tared glass-fibre filter, that has been dried and that has a retention and a filtration speed equivalent to those of Whatman GF/A glass-fibre paper. 5.
35、7.1.2 Forced-draught oven, maintained at between 60 C and 110 C. 5.7.1.3 Desiccator, that contains self-indicating silica gel. 5.7.1.4 Analytical balance, with a resolution of 0,01g or better. 5.7.2 Procedure 5.7.2.1 Filter (under suction) 200 mL of the well shaken test specimen through the glass-fi
36、bre filter (see 5.7.1.1) and thoroughly wash the residue on the filter with water. Allow the filter to drain completely. 5.7.2.2 Dry the filter and the residue for 3 h at 105 C 5 C in a forced-draught oven (see 5.7.1.2), cool in a desiccator (see 5.7.1.3) and weigh (see 5.7.1.4). 5.7.3 Calculation C
37、alculate the water-insoluble matter content (W), in grams per litre, as follows: W = 5 m where m is mass of the residue, in grams. Check for compliance with table 1. 5.8 Cleaning efficiency 5.8.1 Apparatus 5.8.1.1 Means of heating the artificial soil ingredients (see 5.8.2.1) at a temperature of 80,
38、0 C 2 C. 5.8.1.2 Six glass petri dishes of diameter 96 mm 2 mm and of depth 11 mm 2 mm. 5.8.1.3 Oven, maintained at between 240 C and 250 C. SANS 1255:2009 Edition 2 8 5.8.2 Materials 5.8.2.1 Artificial soil. Melt and mix the following ingredients at 80,0 C 2 C (see 5.8.1.1), allow to cool to room t
39、emperature and then mix thoroughly to a smooth paste. Ingredient Mass g a) Cooking fat, that complies with the requirements of SANS 1875 . 110 b) Lard, that complies with the requirements of SANS 1675 . 110 c) Cooking oil, that complies with the requirements of SANS 1875 110 d) Icing sugar 22 5.8.2.
40、2 Standard oven cleaner, type 1 and type 2. A solution that consists of the following: Ingredient Mass fraction % a) Sodium hydroxide . 6,0 b) Sodium lauryl sulphate, 95 % pure . 3,0 c) 2-Butoxyethanol 10,0 d) Carbon dioxide-free water . 81,0 5.8.2.3 Standard oven cleaner, type 3. A solution that co
41、nsists of the following: Ingredient Mass fraction % a) Sodium hydroxide . 5,0 b) Sodium xylene sulphonate, 93 % pure . 10,0 c) Nonyl phenol polyglycol ether, with 9 mol ethylene oxide, 100 % active3,0 d) Carbon dioxide-free water . 82,0 5.8.3 Procedure 5.8.3.1 Apply 0,8 g 0,02 g of the artificial so
42、il (see 5.8.2.1) evenly to the bottom of each of the six petri dishes (see 5.8.1.2) by means of a small, soft brush. 5.8.3.2 Place the dishes in an oven that has been heated to approximately 245 C (see 5.8.1.3). Close the oven and maintain it at 245 C 5 C for 2 h. Remove the dishes from the oven and
43、 allow them to cool to room temperature. 5.8.3.3 Place the prepared dishes for approximately 30 min in an oven maintained at 80 C 2 C. 5.8.3.4 Measure a 50 mL portion of the relevant standard oven cleaner (see 5.8.2.2 and 5.8.2.3) into each of three glass beakers and a 50 mL portion of the undiluted
44、 test specimen into each of three other glass beakers. 5.8.3.5 Without removing the dishes from the oven, pour into each of three dishes one of the 50 mL portions of standard oven cleaner, and into each of the remaining three dishes, one of the 50 mL portions of the test specimen. 5.8.3.6 In the cas
45、e of a type 3 test specimen and standard oven cleaner, cover each filled dish with a watch-glass. SANS 1255:2009 Edition 2 9 5.8.3.7 Close the oven door and maintain the oven at 80 C 2,0 C for a period (started when the oven door is closed) of 30 min in the case of a type 1 or type 2 test specimen a
46、nd standard oven cleaner, and 45 min in the case of a type 3 test specimen and standard oven cleaner. 5.8.3.8 Remove the dishes from the oven, decant the cleaning fluids and carefully rinse the dishes under very slow running tap water at ambient temperature. 5.8.3.9 Visually compare the dishes clean
47、ed with the test specimen and those cleaned with the standard oven cleaner for compliance with 4.6. 6 Packing and marking 6.1 Packing 6.1.1 General requirements for containers 6.1.1.1 Each container shall be packed in accordance with the relevant requirements of SANS 10229-1. 6.1.1.2 All the cleaner
48、 in a container shall be from the same batch. In addition, only containers of the same size and bearing the same batch identification shall be packed together in a bulk package. 6.1.2 Types 1 and 2 containers The cleaner shall be packed in containers that prevent leakage and contamination of the pro
49、duct and that are strong enough to withstand normal handling and transportation. 6.1.3 Type 3 containers 6.1.3.1 The cleaner-propellant mixture shall be packed in cans with valve assemblies that are covered by a protective cap. 6.1.3.2 The can shall be a low-pressure aerosol can. The valve stem of the valve assembly shall be fitted with a side discharge plastics actuator that is suitable for surface spraying. 6.1.3.3 The direction of the
