Iso 22282-2 Pdf - Bs En

Title: BS EN ISO 22282-2:2012 – Geotechnical investigation and testing. Determination of permeability of soil and rock using field testing

Constant Head Tests: Pumping water in at a steady rate to see how much the ground can "drink". bs en iso 22282-2 pdf

, where water is injected into or withdrawn from an isolated section of a borehole without the use of permanent seals or closed-loop pressure monitoring typical of Part 6. It applies to both saturated and unsaturated conditions , above and below the groundwater level. cdn.standards.iteh.ai Primary Test Methods Title: BS EN ISO 22282-2:2012 – Geotechnical investigation

Practical considerations

• Ensure strict control of quench nozzle geometry and water flow; small changes significantly affect results.
• Use multiple specimens to check repeatability.
• When comparing steels, verify identical test parameters (austenitizing temperature, quench conditions, specimen size).
• For modern alloyed tool steels, consider complementary techniques (dilatometry, simulation) for component-level predictions.

To ensure accuracy and compliance, the following equipment and steps are mandatory under BS EN ISO 22282-2: BS EN ISO 22282-2:2012 - BSI Knowledge Ensure strict control of quench nozzle geometry and

Test apparatus

• Furnace: controlled to raise specimen uniformly to specified austenitizing temperature with specified soaking time.
• Quench device: water jet directed at one end of the specimen; flow and pressure controlled to produce reproducible quench severity.
• Fixtures: hold specimen vertically with quenched end downward; ensure free cooling without contact.
• Hardness tester: Rockwell or Vickers as specified; indenter and load per standard.

: Ideal for intermediate ranges, involving an instantaneous head change and monitoring the decay over time. Constant Head : Applied for lower permeabilities ( 10 to the negative 7 power

Results and Reporting: Requirements for field reports, data interpretation, and final test reports. Official Sources for the PDF

The full technical document is a copyrighted publication and is usually obtained through official standards bodies or technical libraries: ISO 22282-2:2012 - Geotechnical investigation and testing