Ask X3What does 49 CFR 178.706 (Standards for rigid plastic IBCs) require?
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Based on 49 CFR 178.706, the standards for rigid plastic IBCs require the following:
* Application & Design Types: The standards apply to rigid plastic IBCs intended for solids or liquids, which are categorized into specific types based on their design and use (such as stacked vs. freestanding, and for gravity or pressure loading/discharge):
* 11H1: Fitted with structural equipment to withstand the whole load when stacked, for solids loaded or discharged by gravity.
* 11H2: Freestanding, for solids loaded or discharged by gravity.
* 21H1: Fitted with structural equipment to withstand the whole load when stacked, for solids loaded or discharged under pressure.
* 21H2: Freestanding, for solids loaded or discharged under pressure.
* 31H1: Fitted with structural equipment to withstand the whole load when stacked, for liquids.
* 31H2: Freestanding, for liquids.
* Components & Materials:
* They consist of a rigid plastic body (with or without structural equipment) and appropriate service equipment.
* They must be manufactured from plastic material with known specifications, having a strength appropriate for the IBC's capacity and required service.
* Plastics must conform to § 173.24 and be resistant to aging and ultraviolet (UV) degradation. If UV protection is needed, compatible additives, pigments, or inhibitors (like carbon black) must be used. Other additives are allowed if they do not negatively affect the physical or chemical properties.
* Only production residues or regrind from the same manufacturing process may be used as recycled material, unless approved by the Associate Administrator.
* Pressure Relief (Liquids): Rigid plastic IBCs built to transport liquids must be able to release enough vapor to prevent body rupture if subjected to an internal pressure higher than their hydraulic test pressure (using spring-loaded devices, non-reclosing pressure relief devices, or other construction methods).
* Capacity Limits: They must not have a volumetric capacity greater than 3,000 liters (793 gallons) or less than 450 liters (119 gallons).