Why a Glossary Matters
The IBC industry uses a specialized vocabulary that can be confusing for newcomers. Misunderstanding a term can lead to ordering the wrong product, using a container incorrectly, or failing a regulatory inspection. This glossary covers the 40+ most important terms you'll encounter when buying, selling, or using IBC totes.
A - D
ATP Test (Adenosine Triphosphate Test): A rapid test that detects biological contamination on surfaces. Used in food-grade IBC cleaning to verify sanitization effectiveness. Results are measured in RLU (Relative Light Units); lower is better.
Ball Valve: A quarter-turn valve with a spherical closure element. Provides a straight-through flow path with minimal restriction. Common on stainless steel IBCs and as an upgrade on composite IBCs.
Bung: A threaded plug used to seal openings in a container. IBC bungs are typically 2" (NPS or buttress thread) and are used for the top fill opening and sometimes for secondary ports.
Butterfly Valve: The standard discharge valve on most composite IBCs. Uses a disc (the "butterfly") that rotates 90 degrees to open or close. Compact design but provides slightly less flow than a ball valve.
Cage: The tubular steel framework surrounding a composite IBC bottle. Provides structural support for stacking and protects the bottle from impact. Typically made from galvanized steel tubes welded into a grid pattern.
Cam Lock: A quick-connect fitting system used on some IBC valves and adapters. Allows tool-free connection and disconnection of hoses.
CIP (Clean-in-Place): A cleaning method where the container is cleaned without disassembly, using spray balls or rotating jet heads that distribute cleaning solution inside the tank.
Composite IBC: An IBC consisting of a rigid plastic inner container (bottle) within an outer framework (cage) mounted on a pallet. The most common IBC type.
Data Plate: A metal plate attached to the IBC cage or bottle containing the UN marking, manufacturer information, test data, and specifications. Also called the "nameplate."
DOT (Department of Transportation): The U.S. federal agency that regulates the transport of hazardous materials, including requirements for IBC construction, testing, and marking.
E - H
EPA (Environmental Protection Agency): The U.S. federal agency that regulates waste management and environmental protection. Relevant to IBC recycling, spill containment, and hazardous waste handling.
FDA (Food and Drug Administration): Regulates food-contact packaging materials. HDPE used in food-grade IBCs must meet FDA requirements under 21 CFR 177.1520.
First-Flush Diverter: A device used in rainwater harvesting that diverts the initial dirty rainwater away from the collection tank. Typically the first 10-20 gallons.
Food-Grade: An IBC that has been manufactured with FDA-compliant materials and cleaned to standards suitable for contact with food products.
Forklift Pocket: The openings in an IBC pallet base designed to accept forklift tines. Standard pocket dimensions accommodate tines up to 6.5" wide and 2.5" thick.
Gasket: A sealing element (typically EPDM, Viton, or PTFE) used in IBC valves, fill caps, and fittings to prevent leakage.
HDPE (High-Density Polyethylene): The most common material for IBC bottles. A thermoplastic polymer with high strength-to-density ratio, chemical resistance, and recyclability.
I - N
IBC (Intermediate Bulk Container): A standardized industrial container for the transport and storage of liquids and granular materials. Typically 110-550 gallon capacity.
ISPM-15: International Standards for Phytosanitary Measures No. 15. Requires wood packaging materials (including IBC pallets) to be heat-treated or fumigated for international shipment.
LTL (Less-Than-Truckload): A shipping method where freight from multiple shippers shares trailer space. Used for IBC shipments of 1-20 units.
Melt Flow Index (MFI): A measure of the ease of flow of a melted plastic. Used in HDPE quality testing to verify material properties.
NPS (National Pipe Straight): A thread standard used on IBC valves and fittings. Common sizes are 2" NPS for discharge valves and 6" for fill caps.
O - S
Packing Group: A UN classification system that indicates the degree of danger of a hazardous material. Group I = great danger; Group II = medium danger; Group III = minor danger.
PHMSA (Pipeline and Hazardous Materials Safety Administration): The DOT agency that develops and enforces regulations for the safe transport of hazardous materials.
Reconditioning: The process of restoring a used IBC to serviceable condition, including cleaning, component replacement, testing, and re-marking.
RLU (Relative Light Units): The measurement unit for ATP tests. Food-grade cleaning typically requires readings below 100 RLU.
Secondary Containment: A physical barrier (such as a spill pallet or containment berm) designed to capture leaks or spills from a primary container.
Specific Gravity: The ratio of a substance's density to water's density. Important for calculating the weight of IBC contents and verifying the container's maximum gross mass rating.
Stacking Load: The maximum weight that can be placed on top of a loaded IBC. Typically specified on the data plate as a stacking test load in kilograms.
T - Z
Tare Weight: The weight of the empty container. For a standard 275-gallon composite IBC, tare weight is typically 115-135 lbs.
Tote: Informal name for an IBC, particularly in North America. "IBC tote" and "IBC tank" are used interchangeably.
Triple Rinse: A basic cleaning procedure where the container is rinsed three successive times with clean water. The minimum cleaning standard for most non-food applications.
UN Marking: The standardized marking system for IBCs that indicates the container type, performance level, manufacture date, and certifying authority. Required for hazardous materials transport.
UN 31HA1: The most common UN type code for composite IBCs. 31 = rigid IBC for liquids; H = composite; A = plastic inner; 1 = new/first use.
UV Degradation: The breakdown of HDPE polymer chains caused by exposure to ultraviolet radiation. Results in yellowing, embrittlement, and reduced impact resistance.
Viton: A high-performance fluoroelastomer gasket material with excellent chemical resistance. Used in IBC valves for aggressive chemical applications.
Using This Glossary
Bookmark this page for reference whenever you encounter unfamiliar IBC terminology. If you come across a term not listed here, contact us and we'll be happy to explain it and consider adding it to the glossary.
For more detailed technical information, visit our specifications page or FAQ.