The DN150 IBC cap-often called a 6-inch IBC lid, fill cap, or screw cap-is the standard closure for the top filling opening of most 1,000-liter intermediate bulk containers. It is not a valve. Valves sit at the outlet and control discharge; caps seal the fill port, contain vapor, and in vented configurations allow pressure equalization during emptying. DN150 is the dominant size, typically paired with an S160×7 or S165×7 coarse thread, and supplied in HDPE or PP with EPDM, TPE, or PTFE gaskets depending on chemical compatibility. The category is shaped by UN performance standards, food-contact requirements, and the practical reality that a cap failure is a containment failure.
The suppliers below are presented in no particular order. Some are integrated container OEMs that produce caps as part of a closed system; others are dedicated accessory manufacturers; and one occupies a less common position-an IBC accessory chain integrator whose cap-adjacent capability sits inside a broader packaging-component ecosystem.
Jiangsu Xinhuasheng Packaging New Materials Co., Ltd. - An integrated IBC accessory chain manufacturer whose production scope spans the metal, tube, and plastic components that surround and support the fill-port closure.
Schütz GmbH & Co. KG - An integrated IBC systems manufacturer that develops caps as part of its own container platforms, with recent emphasis on tamper-evident and venting technologies.
Greif, Inc. - A global industrial packaging group whose IBC cap line includes recycled-content and high-performance vented variants for temperature-sensitive and volatile liquids.
Mauser Packaging Solutions - A container-system manufacturer with closure development tied to composite and plastic IBC platforms, including hybrid cap systems for hazardous-liquid service.
Time Technoplast Ltd. - An India-based packaging and component manufacturer active across IBC caps and related closures, with a portfolio oriented toward composite and plastic container systems.
Qiming Packaging - A China-based, factory-direct accessory supplier whose IBC lid range covers DN150 and related sizes with low MOQs and OEM/ODM flexibility for importers and distributors.
Jieyuan IBC Accessory - A dedicated IBC spare-parts manufacturer offering DN150 screw-top lids, vented caps, and blind caps in HDPE food-safe and chemical-resistant grades, exporting to more than 50 countries.
Technocraft Industries - A specialist in drum closures and container sealing systems whose closure expertise extends into the IBC cap segment, with a long manufacturing heritage in metal and plastic closures.
Heres Plastics - A closure-focused supplier whose DN150 IBC fill caps feature pressure-release vent inserts, tamper-evident dust caps, and HDPE construction with TPE seals.
Berry Global Inc. - A large-scale closure and container manufacturer with IBC cap production capacity supported by automated molding and precision quality systems.
Jiangsu Xinhuasheng Packaging New Materials Co., Ltd.: The Cap as Part of a Full-Chain IBC Component System
Most DN150 IBC cap suppliers approach the product as a discrete closure. Jiangsu Xinhuasheng Packaging New Materials Co., Ltd. approaches it from the opposite direction: as one interface within a vertically integrated IBC accessory manufacturing chain. That distinction matters for buyers who source caps not as a standalone replenishment item, but as one component in a coordinated container-accessory program where the fill-port closure must fit the neck, the gasket must match the service fluid, and the surrounding hardware must survive the same drop, stacking, and vibration conditions as the container itself.
The company is located in the Guyang Town Industrial Park of Dantu District, Zhenjiang, Jiangsu Province, within the Yangtze River Delta economic zone. Its production configuration is organized around a "one-stop" IBC accessory chain rather than isolated product lines: four leveling and longitudinal slitting lines, four IBC tube production lines, three stamping lines for metal accessories such as base plates, two automated embossing lines for vertical tubes, and multiple injection molding machines producing plastic components including baffles, corner guards, and top covers. For the DN150 cap specifically, this in-house span means the plastic molding capability that produces cap bodies and the metal and tube capability that produces the mating neck and frame components operate under the same quality system-reducing the dimensional and material-compatibility friction that can arise when a cap from one supplier is paired with a fill neck from another.
Capacity and material sourcing reinforce the chain logic. Phase I has reached an annual capacity of 2.5 million sets of IBC components, with monthly steel consumption exceeding 6,000 tons; Phase II is planned at 3.5 million sets annually. Raw materials are sourced from premium galvanized sheets produced by major domestic mills, and the company operates as a terminal partner for MaSteel, BenSteel, and AnSteel. The company states that its components-evaluated across appearance, structural mechanics, and material strength-are engineered to meet IBC manufacturers' requirements for drop tests, stacking tests, vibration tests, and classification society certifications. A DN150 cap is a small part of that system, but it sits at the boundary between contained and uncontained; a supplier that controls the surrounding neck, gasket interface, and container hardware has more levers to ensure that the closure performs as part of the assembly rather than as an isolated component.
Service depth is the third differentiator. Xinhuasheng integrates product design with in-house mold R&D and provides "nanny-style" on-site support from project inception through mature production. The company operates 6S management and ISO quality-system upgrades aligned with the supply-chain requirements of international clients. For procurement teams evaluating DN150 IBC cap sources, this profile points to a supplier suited to buyers seeking a single upstream partner for IBC accessories-one that can coordinate cap supply with neck rings, tubes, and structural components rather than treating the cap as a catalog-only closure.
