1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS 6356 : Part 9 : 1996 I
2、CS 65.060.40 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Spraying equipment for crop protection Part 9. Specification for systems for closed transfer of liquid formulationsThis British Standard, having been prepared under the direction of the Engineering Sector Board, was
3、published under the authority of 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 95/702513 DC ISBN 0 580 25870 X BS 6356 : Part 9 : 1996 Amendments issued since publi
4、cation Amd. No. Date Text affected 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 Agroch
5、emicals Association Ltd. British 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 9 : 1996
6、 BSI 1996 i Contents Page Foreword ii Specification 1 Scope 1 2 References 1 3 Definitions and abbreviations 1 4 General requirements 1 5 Performance requirements 2 Annexes A (normative) Chemical resistance test 3 B (normative) Container rinsing tests with closed transfer systems 3 C (normative) Sys
7、tem leakage tests for closed transfer systems 3 D (normative) Determination of PPP residues on the surfaces of a dry-break coupling after separation 4 E (normative) Determination of residues within the closed transfer system after flushing 4 F (normative) Test liquid formulation 5 Figure F. 1 Plot o
8、f viscosity of the test liquid formulation at different strain rates 5 List of references Inside back coverii BSI 1996 BS 6356 : Part 9 : 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 operato
9、rs. This standard is applicable to most systems designed for the transfer of liquid plant protection products from their original container into the application equipment with the minimum risk to operator safety or of environmental contamination. Compliance with a British Standard does not of itself
10、 confer immunity from legal obligations. BSI 1996 1 BS 6356 : Part 9 : 1996 Specification 1 Scope This Part of BS 6356 gives requirements for a closed transfer system for liquid formulations of plant protection products (PPPs) and specifies the maximum levels of potential contamination during any si
11、ngle transfer operation. 2 References 2.1 Normative references 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 cove
12、r. For dated references, only the edition cited applies; 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, tog
13、ether with any amendments. 2.2 Informative references This 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 e
14、ditions. 3 Definitions and abbreviations 3.1 Definition For the purposes of this Part of BS 6356, the following definition applies. closed transfer system Assembly of components to transfer a plant protection product (PPP) from its original container into the application equipment such that no conta
15、mination of the operator or of the environment by PPP occurs. 3.2 Abbreviation PPP Plant protection product. 4 General requirements 4.1 Closed transfer systems for liquid PPPs shall include the following: a) a means of interfacing with PPP containers and application equipment to provide a leak-proof
16、 and secure connection (other than manually held); b) the ability to transfer part or all of the contents of a PPP container with a minimum of leakage or spillage when disconnected from the container or application equipment; c) a design suitable for operation with any liquid PPP; d) a means of flus
17、hing the closed transfer system such that no concentrated PPP remains within the system on completion of the transfer operation. 4.2 Closed transfer systems shall have facilities for rinsing empty PPP containers to the specified level of cleanliness except when dealing with returnable containers. Wh
18、en tested in accordance with annex B, the maximum residue in any rinsed container shall not exceed 0.01 % of the original contents. 4.3 NOTE. As an option, closed transfer systems may have facilities for measuring the quantities of PPP transferred in a single operation and facilities for returning P
19、PP that is within the transfer system but that has not been delivered to the application equipment back to the original PPP container. Where the closed transfer system is equipped with facilities for measuring the quantities of PPP transferred in a single operation and for returning PPP within the s
20、ystem but which has not been delivered to the application equipment back to the original container, it shall conform to 4.13, and shall have an accuracy of greater than 2.5 % of the capacity of the smallest pesticide container with which the system is designed to operate. 4.4 With the closed transfe
21、r system installed on the application equipment, it shall be possible to operate the transfer system and connection procedures by manual devices positioned at a height of 500 mm to 1000 mm from ground level and requiring a forward reach of less than 500 mm. All systems shall be operated with the ope
22、rator standing on the ground. 4.5 Closed transfer systems shall be capable of operation by gloved hands. The maximum force required to actuate any component relating to connection of the PPP container or control of the transfer process shall be 50 N. 4.6 Closed transfer systems shall be mechanically
23、 robust and capable of the following, with no deterioration in respect of leakage or contaminating residues: a) withstanding pressures of twice the maximum stated pressure for any components that operate at pressures above one atmosphere; b) operating for at least 1000 loading cycles at the maximum
24、transfer rate. 4.7 Closed transfer systems shall be designed so that no part of the transfer equipment is subjected to pressures greater than the manufacturers stated maximum for the system. To minimize potential contamination in the event of a failure, no part of the closed transfer system shall op
25、erate with the concentrated PPP formulation at a pressure of greater than 100 kN/m 2 unless: a) the component parts of the closed transfer system have been pressure tested with a pressure of five times the maximum for the system; or b) a secondary containment system is used to prevent contamination
26、of the operator, other persons or the environment.2 BSI 1996 BS 6356 : Part 9 : 1996 4.8 Closed transfer systems shall not subject the PPP container to pressures 25 kN/m 2 above atmospheric pressure, nor 50 kN/m 2 below atmospheric pressure, during either the transfer operation or any rinsing or flu
27、shing procedure. 4.9 Closed transfer systems shall not deteriorate due to chemical attack when operating with PPP liquids. The performance of closed transfer systems in terms of leakage or contamination shall not deteriorate after the closed transfer system is left filled with the test liquid formul
28、ation (as specified in annex A) for a period of 12 h. 4.10 Manufacturers of closed transfer systems shall specify the range of requirements for the application equipment on which the system is to be installed to give effective operation of the transfer in terms of mounting position, liquid flows, pr
29、essures and any other specific requirements (see 4.4 of BS 6356 : Part 8 : 1996 and figure 1 of BS 6356 : Part 8 : 1996). 4.11 All controls on closed transfer systems shall be clearly labelled using symbols conforming to BS 4964 Parts 1 and 2, where appropriate. 4.12 Closed transfer systems shall be
30、 supplied with comprehensive instructions in accordance with BS 5401 : 1990 relating to the safe use, cleaning, maintenance and storage of the system. 4.13 Manufacturers of closed transfer systems shall specify: a) the maximum and minimum size of PPP container with which the system is designed to op
31、erate; b) the method of connection of the closed transfer system to the PPP container and the range of container closures with which the system safely operates. 5 Performance requirements 5.1 During any transfer operation, when tested in accordance with annex C the maximum leakage shall be less than
32、 0.25 ml. 5.2 On disconnection from the un-rinsed PPP container or the application equipment, when tested in accordance with annex D the maximum residue on all parts of the coupling shall be less than 1.0 ml. 5.3 After rinsing/flushing to the manufacturers specified procedure, when tested in accorda
33、nce with annex E the total maximum residue in any part of the closed transfer system shall be less than 0.5 ml of the original test liquid formulation to be transferred.BS 6356 : Part 9 : 1996 BSI 1996 3 Annexes Annex A (normative) Chemical resistance test A.1 Apparatus Test liquid formulation compr
34、ising 40 % (V/V) kerosene, 20 % (V/V) toluene and 40 % (V/V) xylene. A.2 Procedure A.2.1 Fill the closed transfer system with the test liquid formulation in accordance with the manufacturers instructions and leave for a period of 12 h. A.2.2 After the 12 h period, drain the system, flush out and tes
35、t for leaks and contaminating residues in accordance with annexes C and D. NOTE. Component parts of the transfer system may be tested by immersing sections of pre-recorded dimensions and mass in the test liquid formulation specified in A.1. Annex B (normative) Container rinsing test with closed tran
36、sfer systems B.1 Principle This test uses a test liquid formulation, of which small quantities can be traced and quantified using direct chemical analysis or spectrophotometric (colorimetric) /fluorometric analysis techniques after extraction. B.2 Apparatus B.2.1 Test liquid formulation as specified
37、 in annex F. 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 five of each of the two sizes of
38、 container and seal. After loading and sealing, briefly invert each container through 180 before storing in an upright position. Store the 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 contents of the loaded con
39、tainers into a test closed transfer system 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 within the rinsed PP
40、P 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 and in darkness for a
41、 period of 6 h at a temperature of 20 C; d) during the above storage period, vigorously agitate the containers for 1.0 minute on at least three separate occasions with a minimum interval between such agitations of 1.0 hour; e) take samples of the final rinsate and determine the total quantity of PPP
42、 residue using spectrophotometric (colorimetric)/fluorometric analysis techniques to an accuracy of 5.0ml. Annex C (normative) System leakage tests for closed transfer systems C.1 Apparatus C.1.1 Test formulation comprising water plus 0.1 % of a non-ionic surfactant and a soluble tracer dye. C.1.2 P
43、PP container with which the system is designed to operate. C.1.3 Swabs. C.2 Procedure C.2.1 Load the test formulation (C.1.1) into the largest size of PPP container with which the system is designed to operate. Thoroughly clean all external surfaces of the PPP container and closed transfer system. C
44、.2.2 Connect the PPP container to the closed transfer system. Transfer the test formulation into a test closed transfer system in accordance with the manufacturers instructions. C.2.3 Immediately on completion of transfer and with the connections to both the PPP container and closed transfer system
45、still intact, wipe all external surfaces and particularly those in the region of system couplings with clean, absorbent swabs. C.2.4 Determine the quantity of the original test formulation captured by the swabs using an appropriate spectrophotometric (colorimetric)/fluorometric analysis technique to
46、 an accuracy of 5.0ml.4 BSI 1996 BS 6356 : Part 9 : 1996 Annex D Annex D (normative) Determination of PPP residues on the surfaces of a dry-break coupling after separation D.1 Principle NOTE. Dry-break couplings are common components in many closed transfer systems designed for use with PPPs. The qu
47、antity of residues on the surface of coupling components relates directly to the magnitude of potential operator contamination associated with such a coupling system. D.1.1 Measurements are made with the dry-break coupling in as new condition. The test method does not aim to examine the effects of w
48、ear or build up of deposits on system components on the performance of the coupling. D.1.2 Install the coupling system as for practical operation with the ability to operate vertically and/or horizontally, as appropriate. Manufacturers recommended mounting and operating instructions are used as the
49、basis for any test. D.1.3 The test is conducted with clean water. D.2 Apparatus D.2.1 Dry-break coupling, arranged in the flow line from a ventilated container holding water. NOTE 1. All pipe sizes connected to the dry-break coupling should be appropriate to the body size of the coupling system. NOTE 2. For gravity systems with the coupling attached to a PPP container, the same principles apply with a flow being established from the container before a disconnection is made. D.2.2 Pumping source, (e.g. a Venturi) positioned up-stream of the dry-break
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