Ask X3What does 49 CFR 178.605 (Hydrostatic pressure test) require?
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Based on 49 CFR 178.605, the hydrostatic pressure test requirements are as follows:
* General Application: The test applies to qualify all metal, plastic, and composite packaging design types intended to contain liquids, and it must be performed periodically. It is not required for inner packagings of combination packagings (though aircraft inner packagings have separate requirements).
* Number of Test Samples: You need three test samples for each different packaging type. However, for periodic retesting of packagings made of stainless steel, monel, or nickel, only one sample is required.
* Special Preparation: Vented closures must either be replaced with similar non-vented closures or have the vents sealed.
* Test Method and Duration:
* Support the receptacles securely without invalidating the test.
* Apply test pressure continuously, evenly, and keep it constant.
* Metal and non-plastic composite packagings (like glass, porcelain, or stoneware) must hold the test pressure for 5 minutes.
* Plastic packagings and plastic-material composite packagings must hold the test pressure for 30 minutes.
* The applied pressure must match the pressure marked on the packaging under § 178.503(a)(5), calculated using specific formulas based on the material's vapor pressure and safety factors.
* Packagings intended for Packing Group I hazardous materials must be tested to a minimum pressure of 250 kPa (36 psig).
* Passing Criteria: The package passes the test if there is no liquid leakage from any test sample.