ASTM D7660 Altitude Testing

ASTM D7660 Pressure Tests on United Nations Packaging

ASTM D7660 provides instructions for performing hydrostatic pressure testing. As an ISTA and ISO 17025 certified lab, we realize the importance of pressure testing. Meeting the ASTM D7660 requirements can be difficult. We understand the challenges and guide companies through the process.

Keystone Package Testing creates an accurate test plan to eliminate expensive over-testing. Our pricing is competitive and we offer volume discounts. We provide comprehensive reports shortly after completion of the testing. Thus, our proven process helps avoid product launch delays.

Request a quote and find out first hand about our competitive pricing, timely process, and outstanding reputation. Have a question about ASTM internal pressure testing? Contact us and we will determine the best course of action.

Summary of ASTM Internal Pressure Testing

ASTM D7660 provides information to help define various terms used as part of the United Nations certification process. It also provides information for recommended equipment and fittings for conducted pressure tests.

Scope of ASTM D7660 United Nations Package Testing

The current regulations do not have a required sample size. However, appropriate specimens are randomly selected and inspected. This helps provide the best test results. Test pressure is determined based on the pressures required in the regulations.

After the container is sealed and the air has been removed, the container is pressurized. By adding water, the container is pressurized continuously and slowly up to the required test pressure. The water stays throughout the entire test cycle. This allows the necessary water to be applied to the container through the regulator if container expansion occurs.

The elapsed time to reach the required test pressure is recorded. This includes all design types. If the pressure station incorporates a flow meter, the rate of the flow is also reported. Larger containers may need to be secured with rope, straps, or shims to prevent them from tipping over as they expand during the test. 

Significance of ASTM D7660 Internal Pressure Testing

Dangerous goods require performance tests to be conducted on packages before being authorized for use. The regulations do not include standardized procedures for conducting performance tests. Because of this, the test may result in a non-uniform approach.

ASTM D7660 Pressure testing is a standard guide for conducting internal pressure tests on packaging undergoing U.N. certification testing. These packages are required to meet the pressure capability requirements.

The ASTM D7660 test method duration is conducted at the minimum times required by the applicable regulations. The test time begins when the specimen stabilizes at the minimum required test pressure. Lastly, each package being evaluated is visually monitored throughout the test. Any leakage of water is recorded.

The report may include general information such as the date, time, location and test technician. More in-depth information written in the report includes but is not limited to:

  • Sample size
  • Container-closing method
  • Equipment used
  • Photographs or descriptions of the container orientation
  • Temperature of the filled water container
  • General container information

Expert ASTM D7660 Internal Pressure Package Testing

In addition to U.N. 7660 pressure testing, Keystone has a full scope of expertise including leak penetration, drop, and vibration. We can accommodate flexible and rigid packages of all sizes, including large pallets. Our team strives to give our customers more time and energy on product development instead of testing.

Contact us to learn first hand why so many companies partner with Keystone to achieve their internal pressure certification needs.


For more referenced ASTM standards and similar testing, please follow the links below:

  • ASTM D4919 Guide for Testing of Hazardous Materials (Dangerous Goods) Packaging
  • ASTM D4991 – Leakage Testing of Empty Rigid Containers by Vacuum Method
  • 49 CFR U.S. Department of Transportation Code of Federal Regulations Title 49, Transportation Parts 100-185
  • UN United Nations Recommendations on the Transport of Dangerous Goods, Model Regulations
  • IATA Dangerous Goods Regulations
  • ICAO Technical Instructions for the Safe Transport of Dangerous Goods by Air
  • IMDG Code International Maritime Dangerous Goods Code


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