ISO 22368-3:2004

Overview

ISO 22368-3:2004 establishes standardized test methods for evaluating the internal cleaning performance of tanks in crop protection sprayers. This part of the ISO 22368 series focuses specifically on the internal cleaning systems of spray-liquid tanks in mounted, trailed, and self-propelled agricultural sprayers. The standard excludes sprayers utilizing direct injection systems.

Maintaining effective internal tank cleanliness is critical in crop protection to prevent contamination, avoid cross-mixing incompatible agrochemicals, and reduce environmental and operator exposure risks. ISO 22368-3 provides a uniform test procedure for assessing rinsing system efficiency, enabling manufacturers and users to ensure compliance with safety and environmental standards, and improve equipment performance.

Key Topics

• Scope and Applicability
  • Applies to agricultural sprayers for crop protection and liquid fertilizer use
  • Not applicable to direct injection sprayers
• Test Conditions
  • Temperature: 5 °C to 25 °C for liquid and air
  • Relative humidity greater than 30%
• Test Methodology
  • Uses a 1% suspension of copper oxychloride test powder as tracer liquid
  • Procedure includes tank filling with test liquid, simulated spraying emptying, rinsing operations, drying, and sample collection
  • Concentrations of copper residues in rinse water samples are measured to assess cleaning efficiency
• Rinsing System Evaluation
  • Measures the mass of copper removed by the rinsing device as a percentage of total copper residues after emptying
  • Requires use of atomic absorption spectrometry or equivalent reliable methods for copper concentration determination
• Safety Precautions
  • Environmental hazards are addressed by safe handling, containment, and disposal of test and rinse liquids
• Test Powder Composition
  • Copper oxychloride trihydrate (Cupravit) with specified size distribution and impurity limits to simulate realistic contamination

Applications

• Agricultural Equipment Manufacturers
  • Validate and improve design of internal tank rinsing systems
  • Ensure compliance with crop protection equipment safety and environmental standards
• Equipment Testing Laboratories
  • Provide standardized evaluation of internal cleaning effectiveness
  • Support certification and quality assurance processes
• Farm Operators and Agronomists
  • Select sprayers with effective rinsing systems to minimize chemical residues and contamination risks
  • Optimize rinsing procedures to protect crops, environment, and operator health
• Regulatory Bodies
  • Develop performance benchmarks for internal cleaning of sprayer tanks based on standardized test results

Related Standards

• ISO 22368-1:2004 – Internal cleaning of complete sprayers
• ISO 22368-2:2004 – External cleaning of sprayers
• These complementary parts cover full sprayer internal system cleaning and external surface cleaning methods resulting in comprehensive test protocols for crop protection equipment.

By following ISO 22368-3:2004, stakeholders in the agricultural sector can reliably assess and enhance the efficacy of tank rinsing systems, thereby improving crop protection practices, reducing agrochemical impact, and ensuring safer agricultural operations worldwide.