Welded Carbon Steel Tank for LPG Storage:NOT typically used. LPG requires specialized, high-pressure vessels, not standard carbon steel atmospheric tanks

The storage of Liquefied Petroleum Gas (LPG)—a critical fuel source composed primarily of propane and butane—represents one of the most demanding containment challenges in the energy sector. Critically, LPG exists as a gas at standard atmospheric pressure and must be stored under high pressure or at extremely low temperatures to remain in its liquid state. This fundamental physical requirement makes standard Welded Carbon Steel Tanks—which are designed for atmospheric or low-pressure liquid storage—an unsuitable application for LPG. The integrity and safety of LPG containment hinge on using highly specialized vessels capable of withstanding significant internal pressure.
Shijiazhuang Zhengzhong Technology Co., Ltd, operating globally as Center Enamel, specializes in providing superior containment solutions for a vast range of industrial fluids, particularly those stored at atmospheric pressure. While we do not manufacture the specialized high-pressure storage spheres or bullets required for LPG, our expertise lies in understanding the engineering constraints of demanding liquid containment projects. We recognize that safety in the energy sector is non-negotiable. Our proficiency in fabricating structures with uncompromising structural integrity and adherence to the most stringent international standards demonstrates our commitment to engineering excellence in all facets of industrial containment, including those adjacent to the high-pressure gas sector.

Engineering Constraints: Why Standard Tanks are Unsuitable for LPG

The unsuitability of standard Welded Carbon Steel Tanks for LPG Storage is purely a matter of pressure and thermodynamics. LPG, whether propane, butane, or a mixture, is liquefied by compression. When stored at ambient temperatures, it exerts considerable pressure on the container walls.

Pressure Requirement: At standard temperatures, propane requires a pressure of approximately 175-200 psi (12-14 bar) to remain liquid. Standard atmospheric storage tanks (like those used for oil or water) are designed for internal pressures near zero and cannot handle more than a tiny fraction of this force. LPG storage demands ASME code pressure vessels—thick-walled, usually cylindrical or spherical tanks known as bullets or spheres.

Design and Material Failure Risk: Attempting to store pressurized liquid gas in a tank designed for atmospheric pressure would lead to catastrophic structural failure. The tank walls would be rapidly breached by the uncontrolled internal pressure, resulting in an immediate and severe release of flammable gas, which presents an extreme explosion and fire hazard.

The Correct Solution: Specialized Pressure Vessels: The appropriate containment for bulk LPG is either a refrigerated tank (stored at cryogenic temperatures and near atmospheric pressure, usually requiring alloy steels) or, more commonly, thick-walled pressure spheres or horizontal cylindrical 'bullet' tanks. These specialized vessels are engineered, manufactured, and inspected according to specific codes (like ASME Boiler and Pressure Vessel Code) to handle the immense pressure safely.

While Center Enamel focuses on providing the foundational, cost-effective, and durable atmospheric storage that makes up the vast majority of industrial liquid containment, our experience with large-scale containment principles and rigorous quality control is applied to every demanding project we undertake, offering assurance of structural excellence.

Company Expertise in Demanding Structural Integrity Projects

Although Center Enamel does not participate in the high-pressure gas market, our core strengths in providing robust, leak-proof, and high-volume containment are directly relevant to any industry where structural failure is unacceptable. Our legacy is built on applying precision engineering and rigorous quality control to challenging liquid environments.
Our expert engineering team specializes in designing and modeling tanks that not only meet but exceed all relevant international standards for atmospheric and low-pressure containment, such as API 650. This expertise in structural mechanics, material specification, and stress analysis is the same fundamental commitment to engineering safety that underpins the high-pressure market. We bring decades of field experience to create a solution that is optimized for performance, safety, and longevity for the liquids we do handle.
Our state-of-the-art fabrication facilities are equipped with advanced, automated welding technology to produce consistent, high-quality, full-penetration welds that are crucial for a flawless, leak-proof structure. The necessity for absolute leak-tightness in a standard oil or water tank mirrors the extreme leak prevention required in a pressure vessel. We adhere to stringent international quality standards, ensuring our fabrication processes are rigorously controlled and monitored.
Our rigorous Quality Assurance (QA) and Quality Control (QC) program is thorough and unyielding. Extensive Non-Destructive Testing (NDT), including ultrasonic testing, magnetic particle testing, and radiography, is applied to all critical welds to ensure absolute integrity. This commitment to testing and certification ensures that every structure we deliver provides the highest level of dependability and safety for its intended purpose.

Global Reach, Proven Excellence: Center Enamel's Project Experience

Center Enamel's expansive global footprint and decades of experience in critical liquid containment affirm its position as a Premium Welded Carbon Steel Tank Manufacturer. Our proficiency in diverse industrial sectors handling challenging and high-volume liquids demonstrates our core capability to deliver structurally sound, reliable, and durable solutions.

Industry Applications & Case Studies

We have a proven history of delivering robust and reliable containment solutions across various industrial and municipal sectors that require monumental storage capacity and stringent safety controls:

Industrial Wastewater Treatment: Our involvement with the Hebei Cangzhou Industrial Wastewater Project showcases our expertise in complex, large-scale industrial containment, with an installation of 12 units totaling 32,061 cubic meters. This demonstrates our ability to deliver highly robust and reliable containment solutions for vast industrial liquid inventories.

Urban and Municipal Sewage: We contributed to the massive Sichuan Chengdu Wastewater Treatment Plant Project, which required 16 units with a staggering total volume of 60,870 cubic meters. This project demonstrates our expertise in engineering resilient, high-volume containment for critical infrastructure, proving our capability to handle the immense scale and structural integrity required for any major industrial structure.

Drinking Water: We supported the large-scale Saudi Drinking Water Project (Aluminum Dome Cover), which involved 9 units with a total volume of 37,300 cubic meters. This project highlights our ability to deliver structurally complex, high-capacity tanks for essential infrastructure in challenging global environments, confirming our structural capabilities and dependability for critical, sensitive liquids.

These projects underscore our proven ability to design and construct robust, high-volume, and technologically advanced Welded Carbon Steel Storage Tanks for a wide range of industrial liquids, ensuring a long-lasting and reliable containment solution for their specified application.

Conclusion

While Welded Carbon Steel Tanks are the essential, cost-effective, and safe solution for most industrial and petroleum liquid storage needs, they are unsuitable for LPG Storage due to the extreme pressure requirements of maintaining the gas in liquid form. LPG requires specialized, thick-walled pressure vessels built to different engineering codes. However, Center Enamel's core commitment remains the same: to deliver containment solutions of uncompromising structural integrity, permanent leak-tightness, and superior cost-effectiveness for the applications they are designed for. Our expertise ensures that for atmospheric liquid storage, clients receive the most robust and dependable infrastructure available.

Shijiazhuang Zhengzhong Technology Co.,Ltd is a professional manufacturer dedicated to the design and fabrication of bolted storage tanks since 1989. Our products range includes Glass-Fused-to-Steel (GFS) tanks, fusion bonded epoxy tanks, stainless steel tanks, galvanized steel tanks and aluminum geodesic dome roofs. With professional enameling R&D team and more than 20 enameling patents, Shijiazhuang Zhengzhong Technology Co.,Ltd has become the leader in bolted tanks industry of Asia. Our products are certified to ISO 9001, CE, NSF/ANSI 61, WRAS, ISO 28765, LFGB, BSCI, ISO 45001 and other international standards.

Shijiazhuang Zhengzhong Technology Co., Ltd is not only the first manufacturer in China which produces Glass-Fused-to-Steel tanks, but also the most experienced professional bolted tanks manufacturer in Asia. The engineering & design, product testing and quality system of Center Enamel Glass-Fused-to-Steel tanks is in strict accordance with AWWA D103-09, OSHA, ISO 28765, NSF/ANSI 61, NFPA and other international standards. Center Enamel Glass-Fused-to-Steel tanks are wildly used in drinking / potable water, industrial effluents, municipal sewage, bio-energy, landfill leachate, agriculture and other applications. Until 2023, Center Enamel bolted tanks have been exported to more than 100 countries including USA, Australia, Canada, Malaysia, Indonesia, Russia, UAE, Panama, Brazil and South Africa etc., the superior tank quality and prompt service gains us worldwide recognition.

As an outstanding containment and cover system provider with more than 30 years of experience, Shijiazhuang Zhengzhong Technology Co., Ltd sincerely expects to establish long-term cooperation with the local partners throughout the world and make continuous contribution to the development of the industry.