1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS 6356 : Part 8 : 1996 I
2、CS 65.060.40 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Spraying equipment for crop protection Part 8. Specification for induction hoppersThis British Standard, having been prepared under the direction of the Engineering Sector Board, was published under the authority of
3、the Standards Board and comes into effect on 15 November 1996 BSI 1996 The following BSI references relate to the work on this standard: Committee reference AGE/15 Draft for comment 95/702596 DC ISBN 0 580 25869 6 BS 6356 : Part 8 : 1996 Amendments issued since publication Amd. No. Date Text affecte
4、d Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee AGE/15, Equipment for crop protection, upon which the following bodies were represented: Agricultural Engineers Association British Agrochemicals Association Ltd. British
5、Crop Protection Council British Plastics Federation Health and Safety Executive Imperial College of Science and Technology Long Ashton Research Station Ministry of Agriculture, Fisheries and Food National Farmers Union Silsoe Research InstituteBS 6356 : Part 8 : 1996 BSI 1996 i Contents Page Committ
6、ees responsible Inside front cover Foreword ii Specification 1 Scope 1 2 References 1 3 Definitions and abbreviations 1 4 General requirements 1 5 Performance requirements 3 Annexes A (normative) Chemical resistance test 4 B (normative) Container rinsing test with induction hoppers 4 C (normative) L
7、oading rate and system leakage tests for induction hoppers 4 D (normative) Measurement of surface contamination with induction hoppers 5 E (normative) Test formulations 5 Figures 1 Working clearance zone around the induction hopper installed on an agricultural crop sprayer 2 E.1 Plot of viscosity of
8、 the test liquid formulation at different strain rates 6 List of references Inside back coverii BSI 1996 BS 6356 : Part 8 : 1996 Foreword This Part of BS 6356 has been prepared by Technical Committee AGE/15. This standard is intended to enhance levels of safety for agricultural operators. Induction
9、hoppers are a component part of low level filling systems. They are designed to be incorporated into the main liquid flow circuits of agricultural crop sprayers, to facilitate the loading of concentrated plant protection products into sprayers from ground level. All forms of plant protection product
10、s are intended for use with this standard, including liquids, powders, granules, water soluble bags, gels and tablets. Compliance with a British Standard does not of itself confer immunity from legal obligations. BSI 1996 1 BS 6356 : Part 8 : 1996 Specification 1 Scope This Part of BS 6356 specifies
11、 general and performance requirements for induction hoppers used to load any approved plant protection product (PPP) into an agricultural crop sprayer. Attention is drawn to The Plant Protection Product Regulations 1995 1, regarding approved plant protection products. 2 References 2.1 Normative refe
12、rences This Part of BS 6356 incorporates, by dated or undated reference, provisions from other publications. These normative references are made at the appropriate places in the text and the cited publications are listed on the inside back cover. For dated references, only the edition cited applies;
13、 any subsequent amendments to or revisions of the cited publication apply to this Part of BS 6356 only when incorporated in the reference by amendment or revision. For undated references, the latest edition of the cited publication applies, together with any amendments. 2.2 Informative references Th
14、is Part of BS 6356 refers to other publications that provide information or guidance. Editions of these publications current at the time of issue of this standard are listed on the inside back cover, but reference should be made to the latest editions. 3 Definitions and abbreviations 3.1 Definition
15、For the purposes of this Part of BS 6356, the following definition applies. induction hopper Reception hopper fitted with a lid for the transfer of all forms of PPP, with the following facilities: facility for introducing a wash-down flow of liquid, incorporated into the main flow circuit and used f
16、or the transfer of PPP into the sprayer; facility for rinsing original pesticide containers to a defined level of cleanliness (see annex B). 3.2 Abbreviation PPP Plant protection product. 4 General requirements 4.1 The induction hopper shall have a minimum working volume of 15 l. It shall be permane
17、ntly marked to show the maximum level to which it can be safely filled during normal operation. 4.2 The filling hole to the induction hopper shall have a minimum diameter of 250 mm and shall be fitted with a lid to prevent the ingress of unwanted material when not in use. 4.3 The manufacturer of the
18、 induction hopper shall specify the requirements for its safe and effective installation onto a crop sprayer in terms of mounting arrangement, operating flows, pressures, and any other specific requirements. 4.4 When installed on a crop sprayer and secured in the working position, the height for loa
19、ding the induction hopper shall be between 500 mm and 1000 mm above ground level. There shall be a minimum clearance zone around the hopper of 500 mm, measured from its centre, as shown in figure 1. 4.5 All components of the induction hopper shall be designed to resist chemical attack from PPPs. Whe
20、n tested in accordance with annex A, the induction hopper shall conform to the requirements of 5.2 (see annex C). Where individual components are tested (see note to A.2.2) the change in mass or in any dimension shall be less than 5 % of the original value at constant temperature. 4.6 All controls a
21、ssociated with the operation of the induction hopper shall be clearly labelled using symbols conforming to Parts 1 and 2 of BS 4964 as appropriate. 4.7 The induction hopper shall be supplied with instructions in accordance with BS 5401 : 1990 relating to its initial installation, subsequent safe ope
22、ration, cleaning, maintenance and storage. 4.8 The manufacturer shall specify the range of sizes of PPP container with which the induction hopper is designed to operate. 4.9 The induction hopper shall be fitted with a device to rinse PPP containers to a defined level of cleanliness (see annex B). Wh
23、en tested in accordance with annex B, the maximum residue in any rinsed PPP container shall be less than 0.01 % of its original contents. 4.10 Where the maximum clearance dimension in the base of the hopper exceeds 10 mm, then a mesh strainer with a maximum aperture size of 10 mm shall be fitted to
24、the bottom of the induction hopper in order to prevent debris such as bottle caps, induction seals or water soluble bags entering the circulatory system of the crop sprayer.2 BSI 1996 BS 6356 : Part 8 : 1996 500 to 1000 500 500 500 to 1000 500 Clearance zone Outline of hopper C L of induction hopper
25、 Sprayer a) Front view b) Side view c) Plan view All dimensions in millimetres. NOTE. Other shapes of hopper may be used. Figure 1. Working clearance zone around the induction hopper installed on an agricultural crop sprayer BSI 1996 3 BS 6356 : Part 8 : 1996 5 Performance requirements 5.1 The induc
26、tion hopper, when installed in accordance with the manufacturers instructions, shall be capable of handling the following flow rates for a total period of at least 3 min while using the maximum flow of rinse down water: a) a minimum of 12 l/min of a test liquid formulation; b) a minimum of 6 kg/min
27、of a test granular formulation; c) a minimum of 6 kg/min of a test powdered formulation. The test formulations for this performance assessment shall be as given in annex E. 5.2 When the induction hopper is operating at its maximum flow rate, the total leakage and contamination of the operator during
28、 transfer and rinsing operations shall not exceed 1 ml when tested in accordance with annex C. 5.3 On completion of a transfer operation using the rinsing, washing and flushing procedures prescribed by the manufacturer, the total potential contamination of any surfaces of the induction hopper (insid
29、e or out) shall be less than 1.0 ml of the material originally transferred, when tested in accordance with annex D.BS 6356 : Part 8 : 1996 4 BSI 1996 Annexes Annex A (normative) Chemical resistance test A.1 Apparatus Test liquid formulation, comprising 40 % (v/v) kerosene, 20 % (v/v) toluene and 40
30、% (v/v) xylene. A.2 Procedure A.2.1 Fill the induction hopper with the test liquid formulation by operating in the normal transfer mode and leave for a period of 12 h. A.2.2 After the 12 h period, empty the induction hopper, flush out and test for leaks and potential contaminating residues in accord
31、ance with annexes C and D of this standard. Examine the system for evidence of potential mechanical failure. NOTE. Component parts of the induction hopper may be tested by immersing sections of pre-recorded dimensions and mass in the test liquid formulation specified in A.1. Annex B (normative) Cont
32、ainer rinsing test with induction hoppers B.1 Principle The test uses a test liquid formulation, small quantities of which can be traced and quantified using direct chemical analysis or spectrophotometric (colorimetric)/fluorimetric analysis techniques after extraction. B.2 Apparatus B.2.1 Test liqu
33、id formulation, as specified in annex E. B.2.2 PPP containers, with which the system is designed to operate. B.3 Procedure B.3.1 Conduct the rinsing test with the smallest and largest sizes of PPP container with which the system is designed to operate. B.3.2 Load the test liquid formulation into fiv
34、e of each of the two sizes of container and seal. After loading and sealing, briefly invert each container through 180 before storing in an upright position. Store containers at 20 C for a period of between 12 h and 24 h prior to conducting tests. B.3.3 Conduct the rinsing test by transferring the c
35、ontents of the loaded containers into a test induction hopper in accordance with the manufacturers instructions. Follow the rinsing procedure specified by the manufacturer to give five rinses of each of two sizes of PPP container that have been emptied and rinsed clean. B.3.4 Determine the residue w
36、ithin the rinsed PPP containers by the following method: a) add clean water to the empty container to 25 % of its nominal capacity; b) shake the container vigorously for a period of 1.0 min; c) top up the container to its nominal capacity with clean water, seal with a clean lid and store inverted an
37、d in darkness for a period of 6 h at a temperature of 20 C; d) during the above storage period, vigorously agitate the containers for 1.0 min on at least three separate occasions with a minimum interval between such agitations of 1.0 h; e) take samples of the final rinsate and determine the total qu
38、antity of PPP residue using spectrophotometric (colorimetry)/fluorimetric analysis techniques to an accuracy of 5.0ml. Annex C (normative) Loading rate and system leakage tests for induction hoppers C.1 Apparatus C.1.1 Test formulation, as specified in annex E. C.1.2 Secondary hopper. C.1.3 Collecti
39、ng plate, measuring 0.5 m3 0.5 m and mounted with a suitable medium, e.g. filter paper. C.1.4 Collecting tray assembly. C.2 Procedure C.2.1 Mount a secondary hopper of at least 40 l capacity above the induction hopper such that the test liquid formulation and test granular formulation can be deliver
40、ed to the hopper at controlled flow rates of 12 l/min and 6 kg/min respectively. NOTE. Control of flow out of this secondary hopper is by variable orifice valve. Precalibrate the variable orifice valve of the secondary hopper prior to the commencement of each test to give the required flow rate 2% .
41、 C.2.2 Mount the induction hopper and secondary hopper over a collecting tray assembly to collect any leakage or spillage. C.2.3 Perform the test with liquid, granular and powdered test formulations as specified in annex E. Load the secondary hopper with 36 l of the test liquid formulation or 18 kg
42、of the test granular formulation. Introduce the test powdered formulation directly from pre-loaded plastics bags each containing 1 kg of the test formulation and loaded into the hopper at a rate of one bag per 10 s. BSI 1996 5 BS 6356 : Part 8 : 1996 With the system operating at full capacity and wi
43、th the maximum flow of rinse down water, direct the flow of test formulation into the induction hopper. Maintain a flow rate of 12 l/min or 6 kg/min for a period of 3.0 min. Note any blockage to the flow. C.2.4 During transfer and rinsing of liquid and granular test formulations determine potential
44、splashing to the operator by mounting a flat collecting plate 0.5 m3 0.5 m with a suitable medium (e.g. filter paper) vertically at the front edge of the hopper. Determine any material captured on this surface by spectrophotometric (colorimetric)/fluorimetric analysis techniques to an accuracy of 5m
45、l. C.2.5 On completion of the transfer of liquid and granular test formulations, determine any spillage into the collection tray or any leakage from the hopper and its connection to the crop sprayer by swabbing and quantifying the volume of leakage by spectrophotometric (colorimetric)/fluorimetric a
46、nalysis techniques to an accuracy of 10ml. Annex D (normative) Measurement of surface contamination with induction hoppers D.1 Procedure D.1.1 Carry out the assessment of internal and external surface contamination after having completed the transfer of a load of at least 36 l of test liquid formula
47、tion (as specified in annex E) at the maximum possible transfer rate. D.1.2 Determine internal residues by filling the induction hopper with water to approximately 90 % capacity and allowing this to soak for 6 h. During this soaking period vigorously agitate the water on three occasions for a period
48、 of 1.0 min with a minimum interval of 1.0 h between agitations. Sample the water in the induction hopper, and determine any residues by spectrophotometry (colorimetric)/fluorimetry to a resolution of 5.0ml. D.1.3 Determine external residues including those around the lip of the hopper by swabbing a
49、nd carrying out spectrometric (colorimetric)/fluorimetric analysis to an accuracy of 5.0ml. Annex E (normative) Test formulations E.1 Test liquid formulation E.1.1 Composition The test liquid shall comprise: 1.0 % polysaccharide based on Xanthan; 0.3 % methyl cellulose; 0.1 % of a powdered tracer dye that can be either quantified by either spectrophotometric (colorimetric) or fluorimetric techniques; 98.6 % tap water. E.1.2 Mixing protocol (for batch of approximately 20 l) Use the following method to mix the test liquid formulation. a) Weigh out th
