ISO 21191:2021 pdf free download.Equipment for crop protection Closed transfer systems ( CTS ) Performance specification.
1 Scope
ISO 21191 specifies operator and environment-related safety requirements and the means of their verification for the design and construction of closed transfer systems (CTS) for liquid formulations of plant protection products (PPP) in 11 to 20 1 containers.
In addition, it specifies the type of information on safe working practices including information about residual risks to be provided by the CTS manufacturer and specifies the maximum potential contamination during any single transfer operation.
2 NormatIve references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of ISO 21191. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
Iso 3600, Tractors, machinery for agriculture and forestry, powered lawn and garden equipment — Operator’s manuals — Content and format
ISO 3767-1, Tractors, machinery for agriculture and forestry, powered lawn and garden equipment — Symbols for operator controls and other displays — Part 1: Common symbols
ISO 3767-2, Tractors, machinery for agriculture and forestry, powered lawn and garden equipment — Symbols for operator controls and other displays — Part 2: Symbols for agricultural tractors and machinery
ISO 5681, Equipment for crop protection — Vocabulary
ISO 21278-1:2008, Equipment for crop protection — Induction hoppers — Part 1: Test methods
ISO 21278-2, Equipment for crop protection — induction hoppers — Part 2: General requirements and
performance limits
3 Terms and definitions
For the purposes of ISO 21191, the terms and definitions given in ISO 5681 and the following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
3.2
closed transfer system Cl’s
device or assembly of components, including the container to application equipment (31) interface, intended to wholly and partially transfer plant protection products or other compatible liquids from their original containers into application or mbLing equipment by direct coupling or other engineering means of enclosure that reduces the exposure of the operator and environment
ISOURCE: ISO 5681:2020, 3.2.9.6J
3.3
single transfer operation
actions required to be completed starting from connection of the container to the CTS. completion of the product transfer procedure, measurement of partial transfers where applicable, rinsing of the container and the transfer device, and removal of the container ready for storage or disposal
4 General requirements
4.1 CTSshallindude:
a) a means of interfacing with containers (see Annex A as an example) and application equipment; b) a means ofcontrolllngor measuring part or all of the product from the container;
c) a means to rinse the container in to the application equipment, if appropriate (for example if CTS is designed for containers as shown in AnnexA)
d) a means of flushing the CTS as well as the interface.
Compliance shall be checked by Inspection and the function tests specified in ISO 21191.
4.2 A manual shall be provided by the Cl’S manufacturer that meets the requirements in CIu.iise.
4.3 All operations of a CTS shall be possible while using appropriate personal protective equipment, Including gloves as recommended in the operator’s manual and on the container label.
Compliance shall be checked by a function test.
4.4 CTS’s shall be designed so that no part of the equipment is subjected to pressures greater than the manufacturer’s stated maximum for the system. To minimize potential contamination in the event of a failure, no part of the CTS shall operate with the concentrated product formulation at a pressure greater than 100 kPa unless:
a) the component parts of the CTS have been pressure tested with a pressure of two times the maximum for the system, or
b) a secondary containment system Is used.
The Cl’s shall riot modify the pressure in the container by more than negative 4 kPa from the ambient atmospheric pressure.
Compliance shall be checked by measurement a) and inspection b).
4.5 The CTS shall empty the content of the container while:
a) maintaining the shape, dimensions and leak tightness of the container; no leakage shall occur In accordance with £1:
b) allowing drainage of the contents, In accordance with 5.2;
5.1.3.4 The pipe/hose supplying the rinsing water to the CTS shall be lifted with a pressure indicator
and any pump or other mLans of assisted dispense shall be fitted with a crop sprayer pressure gauge.
Sprayers shall be fitted with a pressure indicator, the accuracy of which shall be
— ±0.2 bar for working pressures between 1 bar (included) and 8 bar (included),
— ±0,5 bar for working pressures between 8 bar and 20 bar (included), and
— ti bar for working pressures more than 20 bar.
The pressure indicator shall be clearly readable. The pressure indication shall be stable. The scale of the pressure indicator shall be marked as follows:
— every 0.2 bar for working pressures less than 5 bar;
— every 1,0 bar for working pressures between S bar (included) and 20 bar (included);
— every 2.0 bar for working pressures more than 20 bar.
5.1.3.5 UltravIolet disclosing goggles or filter with yellow lenses, to protect the eyes of the test operator and to enhance visibility of UV fluorescence.
5.1.3.6 An ultraviolet light source: High output LED flashlight, with a wavelength of 385 nm to
400 nm and a minimum UV-A intensity of 10 000 pW/cm2.
5.1.3.7 Potable water and disposable wipes for dye removal.
5.1.3.8 An absorbent sheet able to collect all splashes and leakages placed on ground under the CTS to be tested. The dimension should be able to collect splashes and leakage from the Cm and connection to the application equipment.
5.1.4 Procedure
5.1.4.1 Load the test formulation to the nominal volume of the container (5.L3.2). Thoroughly clean all external surfaces of the product crrntainer and Cl’S using the ultraviolet dye removal materiak specified In 5.13.7. Scan all surfaces of the product container and CTS with the UV light source and remove any disclosed areas using the dye removal materials to ensure no dye is visible.
5.1.4.2 The operator shall ensure to use a coverall and gloves that are not contaminated with the test formulation, These can be tested using the DV light source in a dark room before and after the test. Connect the filled container prepared as specified in 5.1.4.1 to the CTS. Transfer the test formulation into the Cl’S to be tested in accordance with the CTS manufacturer’s instructions including the measuring device if fitted.
5.1.4.3 Immediately upon completion of the actions in S.L4.2 and with the connections to the container and CTS fully engaged and connected, blackout all windows and turn ofT all other light sources to the point that no visible light enters the room then use the DV light source to nspect all external surfaces of the container, Cl’S and associated connections. Using the appropriate yellow tinted spectacles/filter, observe the surfaces for evidence of leakage. Record any leakage in a test report (see example in Annexi2).
5.1.4.4 Operate the container rinsing device of the CTS as detailed in the manufacturers’ operator manual to achieve the Internal rinsing of the container and internal rinsing of the CTS as specified in £2. Use the DV light source to Inspect all external surfaces of the product container. CTS and associated connections.