Overview
ISO 9912-2:2013 - Agricultural irrigation equipment - Filters for microirrigation - Part 2: Strainer-type filters and disc filters defines construction requirements and test methods for strainer and disc filters used in microirrigation systems. It covers design, marking, mechanical and hydraulic tests (static and cyclic pressure tests, element tightness, clean pressure drop), and manufacturer information. It does not address filtration performance (efficiency, capacity, water quality) or automatic flushing filter mechanisms (covered by ISO 9912-3).
Key topics and requirements
- Scope and exclusions: Applies to strainer filters and disc filters for agricultural irrigation; excludes filtration ability/efficiency/capacity and automatic flushing structural tests.
- Marking: Filter housings must show manufacturer/trademark, model, nominal size, nominal pressure, flow direction arrow; filter elements must show manufacturer and aperture size (microns).
- Materials and construction:
- Parts in contact with water must be non‑toxic and corrosion/chemicals resistant.
- UV-exposed plastics require UV stabilizers; waterway enclosures should block light.
- Components of same model must be interchangeable.
- Connections and dimensions:
- Threaded ends to comply with ISO 7-1 or be supplied with suitable adaptors.
- Flanges to comply with ISO 7005-1/7005-2 as appropriate.
- Filter connection length tolerances specified.
- Mechanical and hydraulic tests:
- Static hydrostatic pressure test to 1.5 × nominal pressure (pnom).
- Cyclic pressure test between 1 bar and pnom (specified timing sequence).
- Tests for filter element tightness, resistance to buckling/tearing, and measurement of clean pressure drop.
- Tests performed with water at 23 °C ± 3 °C; instrumentation accuracy ±2%.
- Defined terms: aperture size (microns), clean pressure drop, safe maximum pressure drop, critical pressure drop, nominal pressure and size.
Practical applications
- Use ISO 9912-2:2013 when designing or manufacturing microirrigation filters (strainer or disc types) to ensure durability, interchangeability and documented test procedures.
- Adopt for product specification and procurement to set minimum construction and marking requirements.
- Reference in test laboratories and certification bodies for standardized mechanical and hydraulic testing.
- Useful for irrigation system designers, OEMs, quality managers and maintenance teams to select compliant filters and interpret manufacturer declarations (flow ranges, aperture size, safe pressure drops).
Related standards
Keywords: ISO 9912-2:2013, microirrigation filters, strainer filters, disc filters, agricultural irrigation equipment, filter test methods, filter housing, aperture size, nominal pressure.
Open preview (PDF)Agricultural irrigation equipment — Filters for microirrigation — Part 2: Strainer-type filters and disc filters
