ISTA 7E

Test Procedure 7E outlines the thermal performance evaluation of insulated shipping containers utilized in parcel delivery systems. This standard measures the specific capacity of a temperature-controlled package to protect its payload from external atmospheric variances.

The protocol serves as a benchmark for verifying thermal packaging configurations across any material type. It is widely used to analyze individual package insulation or to perform comparative evaluations against real-world environmental exposure profiles.

During testing to ISTA 7E, the package insulation, refrigerants, and product mass are assessed as an integrated system.

Please note: ISTA 7E is dedicated strictly to thermal barriers and energy mitigation. This standard is not intended to measure or simulate structural package damage from dynamic transit forces such as shock, vibration, or compression.

Test Details

The simulation sequence exposes the test specimen to a controlled progression of environmental cycles inside an automated chamber.

Requirements typically include:

• Product and Component Pre-conditioning: Establishing the baseline internal temperature of the product and thermal mediums prior to exposure.
• Atmospheric Thermal Conditioning: Exposing the fully assembled shipping unit to a designated 72-hour or 144-hour sequence consisting of fluctuating temperature cycles (such as localized radiant heat or cold drops).

Applicable Packaging Types

• Insulated small parcel shipping containers
• Thermal liners and passive cold chain packaging
• Phase change material (PCM) and gel-pack engineered configurations

This method tests all types of packaging

Please Note: The information outlined above is to be used as reference for ISTA 7E. Please refer to ISTA's website for full details.

Support for ISTA Distribution Testing
If you are considering testing to ISTA 7E, or would like support selecting the most appropriate distribution testing approach, Smithers can help. Our experts support organizations with transit simulation, packaging validation, and distribution testing programs aligned with real-world supply chain conditions. Speak with a distribution testing specialist.