ISO 21018-3:2008 PDF
Hydraulic fluid power — Monitoring the level of particulate contamination of the fluid — Part 3: Use of the filter blockage technique
Hydraulic fluid power — Monitoring the level of particulate contamination of the fluid — Part 3: Use of the filter blockage technique
- Статус документа:
- Действующий
- Формат:
- Электронный (PDF)
- Количество страниц:
- 16
- Дата публикации:
- 16 апреля 2008 г.
- Издание:
- ISO IS 21018 edition 1 version 1
- ICS:
- 23.100.60
ISO 21018-3:2008 specifies a method for the semi-quantitative determination of the particulate contamination level using the filter blockage technique (also known as the mesh-obscuration method or the pore-blockage technique) either on-line or off-line in containers. ISO 21018-3:2008 also defines procedures for calibrating the instruments and verifying their correct operation both in the laboratory and in service. In general, the techniques are suitable for monitoring the general cleanliness level in hydraulic systems, the progress in flushing operations and support equipment and test rigs. The use of ISO 21018-3:2008 is applicable to all single- or multi-phase liquid systems.
Abstract
Overview
ISO 21018-3:2008 - "Hydraulic fluid power - Monitoring the level of particulate contamination of the fluid - Part 3: Use of the filter blockage technique" specifies a semi‑quantitative method to monitor particulate contamination in hydraulic liquids using the filter blockage technique (also called the mesh‑obscuration or pore‑blockage method). The standard covers both on‑line and off‑line (container/sample bottle) use, and defines procedures for calibrating and verifying instruments in the laboratory and in service. It applies to all single‑ or multi‑phase liquid systems and is intended for monitoring system cleanliness, flushing operations and support equipment or test rigs.
Key topics and technical requirements
- Principles: Two measurement principles are defined
- Constant differential pressure across the filter (monitor change in flow)
- Constant flow through the filter (monitor change in differential pressure)
- Calibration & verification: Procedures for preparing calibration dust (ISO 12103‑A3), creating verification samples, and validating instrument operation to improve consistency and correlation with optical particle counters (APC).
- Equipment & sample handling: Requirements include cleaned sample bottles (ISO 3722), reference instruments, oven for dust drying (100–150 °C), sample agitating devices (ultrasonic or shaker), filtered solvent dispensers (0.8 µm), vacuum de‑aeration, and validated test rigs (ISO 11943).
- Cleanliness thresholds: Flushing liquids and sample bottle RCLs are specified (examples: flushing liquid
Технические детали
- Технический комитет
- ISO/TC 131/SC 6 - Contamination control
- SKU
- ISO 21018-3:2008
Похожие стандарты
Стандарты, упомянутые в описании
ISO 12103-1:1997
ОтменёнRoad vehicles — Test dust for filter evaluation — Part 1: Arizona test dust
SIST ISO 3722:1997
ДействующийHydraulic fluid power -- Fluid sample containers -- Qualifying and controlling cleaning methods
Overview SIST ISO 3722:1997, titled "Hydraulic fluid power - Fluid sample containers - Qualifying and controlling cleaning methods," is an international standard developed by the International Organi…
SIST ISO 11943:2022
ДействующийHydraulic fluid power - Online automatic particle-counting systems for liquids - Methods of calibration and v…
Overview SIST ISO 11943:2022 - "Hydraulic fluid power - Online automatic particle-counting systems for liquids - Methods of calibration and validation" - defines procedures to calibrate and validate…