ASTM D 951 Standard Test Method for Water Resistance of Shipping Containers by Spray Method
ASTM D 951 testing determines the ability of a shipping container to resist water. Water can adversely affect the contents, but also deteriorate the container over time. ASTM D-951 testing is the standard to evaluate both conditions.
This specific ingress protection test is just one of several IP Code tests. However, it is also considered a package testing standard as well. From a package testing perspective, it is typically combined with other packaging tests including drop testing, inclined impact testing, vibration testing and compression testing. The overall goal is to ensure that contents of the shipping container effectively protect its contents during the rigors of transportation and storage.
To complete the test, the ASTM D 951 test lab requires at least three containers. The containers must be closed and sealed as they normally would be when used to transport products. ASTM-D-951 testing does not permit the testing of a “golden unit”. The enclosure to be tested must be any random one from production. The test standard requires some of the shipping containers to be empty. At the same time, some of the containers must have the contents they are made to ship.
To complete the ASTMD 951 IP Code testing, the ingress protection test lab needs to have substantial equipment and capabilities. Included below are details taken directly from the ASTM D951 test standard:
Liquid conditioning and control equipment:
- Spray nozzles. These nozzles are to be of such size and so spaced that the specified intensity of spray falls uniformly distributed over the floor area. The spray nozzles must be located such that the droplets are falling from gravitational force only when they strike the equipment under test.
- Flow Control Valves must be used to control the intensity of the spray.
- A reservoir for storage and conditioning of the spray water should be used. The reservoir needs to be equipped with an overflow to a sewer and with a drain to facilitate changing the water at the start of each test. Make-up water, regulated by a float control, needs to be discharged into this tank.
- A thermostatically controlled means of heating and cooling the water is required. This ensures maintaining the supply water at the desired temperature.
- A circulating system is usually required. This typically consists of a fine-mesh strainer, pump, relief by-pass, gages, and pressure regulating valve. These components are tied into the flow control valves, spray nozzles, and water reservoir to create the system.
Conditioning and containment equipment:
- Equipment to provide the appropriate conditioning is required. These facilities must provide for conditioning test specimens at proper humidity and temperature prior and during testing.
- A water-resistant test room or cabinet must be used. This should ideally be insulated and heated when necessary so that proper temperature control can be maintained. The bottom of the room or booth typically has a false floor of slats and an outlet drain.
Keystone Compliance is a leader in testing to the ASTM D951 ingress protection test. With significant experience, we specialize in providing testing. Almost as important, we also specialize with developing the test plan and identifying potential solutions when enclosures do not meet the requirements. Our ingress protection lab scope is limitless. Our liquid testing includes immersion, dripping water and spraying water. We can accommodate test items of any size. Contact us to see firsthand why so many companies partner with Keystone Compliance to meet their IP Code testing needs.