ISO 9357:1990

Overview

ISO 9357:1990 specifies dimensional and marking characteristics for agricultural sprayer tanks used in crop protection. The standard defines the nominal volume of tanks, the diameter of the filling hole, and guidance for the contents gauge scale between marks. It applies to hand-held, mounted, trailed and self‑propelled sprayers with tanks that are not designed for overpressure.

This International Standard is intended to promote consistent, safe and practical tank design and marking so that operators and manufacturers share common expectations for filling and measurement.

Key Topics

• Nominal tank volume: Values and conventions for declaring tank nominal capacity; the standard addresses the relationship between declared nominal volume and the tank's total capacity.
• Filling hole diameter: Specified dimensional ranges to support safe, efficient filling and to reduce spillage and overflows during filling operations.
• Contents gauge scale: Guidance on scale spacing between marks on level gauges; the standard notes that more detailed gauges are recommended for improved accuracy.
• Applicability: Covers hand-held, mounted, trailed and self‑propelled sprayers equipped with non‑pressurized tanks.
• Design tolerances and notes:
  • The difference between total and nominal volumes shall be at least 5%.
  • In some cases no specific dimension is fixed and the manufacturer's choice applies; the standard provides reference values rather than prescriptive, one‑size‑fits‑all dimensions.

Applications

ISO 9357:1990 is useful across the agricultural equipment lifecycle:

• Manufacturers: Use the standard to design tanks and fill points that meet industry expectations for capacity, safety and operability.
• Procurement and specification: Buyers and specifiers can require compliance to ensure compatibility between pumps, filling equipment and operator practices.
• Operator safety and training: Clear fill-hole sizing and gauge markings reduce the risk of spills, overfilling and chemical exposure during mixing and filling.
• Maintenance and calibration: Standardized gauge scales support repeatable calibration and inventory control of spray volumes.
• Regulatory and inspection: Provides objective reference points for inspection of sprayer tanks used in crop protection.

Related Standards

ISO 9357:1990 was prepared by ISO/TC 23 (Tractors and machinery for agriculture and forestry). Related areas of standardization to consider when working with sprayer equipment include:

• Standards addressing sprayer performance, calibration and spray drift control.
• Standards for machinery safety, tank materials and handling of crop protection products.

For authoritative and complete specifications, obtain ISO 9357:1990 from the International Organization for Standardization or your national standards body.