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Oil tanks (SS, SF, FF)

Double-walled oil tanks refer to three types: SS oil tanks, SF oil tanks, and FF oil tanks. SF stands for steel-reinforced fiberglass double-walled storage tank. It is a double-walled tank structure formed by adding a layer of fiberglass reinforced plastic (FRP) anti-seepage jacket to the outside of a single-layer steel oil tank. There is a communicating gap space between the steel inner tank and the FRP outer tank; FF stands for fiberglass reinforced plastic double-walled oil tank. Both the inner and outer layers are made of fiberglass reinforced plastic, with a communicating gap space in between; It is also equipped with a leak detection device that can monitor the gap space 24 hours a day. Once a leak occurs in the inner or outer tank, the sensor of the leak detection device can detect the liquid level at the bottom of the gap space and issue an alarm to ensure the safe use of the oil tank.

Skid-mounted oil equipment

Composed of a steel inner tank and a reinforced fiberglass (or polyester (PE)) outer tank, the storage tank has a uniform interlayer space equipped with an interconnected leak detector. ● The economic double-layer oil tank has a service life 5-10 times that of an ordinary single-layer steel oil tank, with a service life of 30 years, greatly saving maintenance investment costs. ● The leak detector monitors 24/7 to eliminate pollution risks and effectively protect the original ecological environment of the soil. ● Composed of a steel inner tank and a steel outer tank, the storage tank has a uniform interlayer space equipped with an interconnected leak detector. ● Thick structure wall, the highest external pressure strength, but the outer layer is easily corroded, and the service life is short. ● The leak detector monitors 24/7 to eliminate pollution risks. ● Both inner and outer layers are made of reinforced fiberglass, and the storage tank has a uniform interlayer space equipped with an interconnected leak detector. ● Never rusts, long maintenance cycle, has the basic conditions for liquid medium leak detection, service life of 50 years, has cost-effectiveness and whole-life cost advantages. ● The remote monitoring system facilitates daily and regular inspections, digital control, eliminating complex manual operation, and the oil tank has excellent corrosion resistance, light weight, and easy installation.

Pipe jacking products

According to the "Special Equipment Safety Law of the People's Republic of China" and the "Regulations on the Safety Supervision of Special Equipment," the General Administration of Quality Supervision, Inspection and Quarantine has revised the "Catalog of Special Equipment," which has been approved by the State Council and is now promulgated and implemented. At the same time, the "Notice on the Promulgation of the <Catalog of Special Equipment>" (Guo Zhijian Guo [2004] No. 31) and the "Notice on the Supplementation of the Catalog of Special Equipment" (Guo Zhijian Te [2010] No. 22) are hereby repealed. The "Catalog of Special Equipment" shall be interpreted by the General Administration of Quality Supervision, Inspection and Quarantine. Its scope is defined as: gas, liquefied gas with a maximum working pressure greater than or equal to 0.1 MPa (gauge pressure), and liquid with a maximum working temperature higher than or equal to the standard boiling point; fixed and mobile containers with a volume greater than or equal to 30 L and an inner diameter (for non-circular cross-sections, the maximum geometric size of the inner boundary of the cross-section) greater than or equal to 150 mm; gas cylinders containing gas, liquefied gas, and liquid with a standard boiling point equal to or less than 60 ℃, with a nominal working pressure greater than or equal to 0.2 MPa (gauge pressure), and whose pressure and volume product is greater than or equal to 1.0 MPa·L; oxygen cabins.

End cap

A closure is a component used to seal the end of a container to isolate the internal and external media; it is also known as an end cap. The closures of cylindrical containers are generally rotary shells. According to the shape of the closure surface, they can be divided into convex, conical, flat, and combined shapes. A convex closure refers to a closure with a convex outer surface, such as hemispherical, elliptical, dished, and seamless spherical closures. Some gas cylinders use a combined bottom closure with an inward-facing convex surface, which ensures both strength and safe use.

Direct causes affecting the quality of double-walled tanks

[{"id": 1, "text": "Double-wall tanks, as everyone knows, are primarily composed of an inner tank and an outer tank, widely used in the petrochemical industry. They are generally installed underground, hence the name "buried double-wall tanks." The outer tank seals the inner tank, equipped with a 24-hour monitoring system, ensuring safe operation. Therefore, the quality of double-wall tanks is crucial, as it directly affects the safety of the oil depot and personnel. So, what are the factors that affect the quality of double-wall tanks? Let's explore the causes affecting the quality of double-wall tanks with Huajing: 1. Substandard steel materials: Many manufacturers, in pursuit of lower costs, purchase steel from small factories. These materials often have high carbon content, high sulfur content, and other harmful elements, leading to heat cracks during welding, reduced weld ductility, weld cracking, and oil leakage. 2. Unreasonable design and cost reduction: Some manufacturers, in an attempt to cut costs, compromise on design by reducing steel plate thickness, thus lowering the strength of the double-wall tank. This can result in deformation or even collapse of the buried double-wall tank during oil storage. 3. Unreasonable material selection: In many large buried double-wall tank projects, such as those exceeding 10,000 cubic meters, Q235 steel plates are used throughout, resulting in insufficient strength in the lower half of the double-wall tank, causing deformation. 4. High welding stress during installation: Many inexperienced installers apply excessive force during the welding process, increasing welding stress and leading to weld cracking and oil leakage during use. 5. Welding without opening a break in the buried double-wall tank. Daily maintenance of buried double-wall tanks: 1. Maintenance should be carried out according to the maintenance procedures for buried double-wall tanks, including annual, quarterly, and monthly maintenance. 2. All attachments must be kept in good condition, regularly inspected, maintained, and recorded. 3. The tank body should be clean, with no water, oil stains, or debris on the tank top. The double-wall tank insulation layer should be intact, and the protective layer should be undamaged. 4. Monthly inspection: The oil level gauge should be inspected before each use and covered after use. 5. The breather valve, hydraulic safety valve, and flame arrester should be inspected monthly, and weekly in winter. The breather valve should be flexible and easy to use; the hydraulic valve oil level should meet requirements, and the oil quality should be qualified."}]

Jiangxi Huajin Petrochemical Equipment Co., Ltd

Jiangxi Huajin Petrochemical Equipment Co., Ltd. is located in the beautiful Jianshan Lake area of Jinxian County Gaoqiao Industrial Park on the outskirts of Nanchang City. The Zhejiang-Gan Railway and Beijing-Kowloon Railway pass through the region, and National Highways 320 and 316, as well as the Fuyin and Hukou expressways, converge nearby, resulting in convenient transportation. Established in July 2009, the company covers an area of 35,986 square meters and has a registered capital of 65 million RMB. It is a specialized production base for A3 heads in Jiangxi Province. In 2011, the company obtained the "People's Republic of China Special Equipment Manufacturing A3 License" issued by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, and also obtained the D1 and D2 low and medium pressure vessel production licenses. It has become a specialized production base for A3 heads in Jiangxi Province, filling the gap in the pressure vessel head industry in Jiangxi Province. In 2012, it independently developed new products (environmentally friendly double-layer oil tanks), obtained a utility model patent certificate issued by the State Intellectual Property Office, passed the certification of the American UL certification agency and the National Fiberglass Products Quality Supervision and Inspection Center, and met the quality identification of various specifications of products to meet customer needs. The company possesses domestically advanced cold spinning head production units, head hydraulic presses (1500 tons), automatic plate rolling machines (one set each for 20mm, 30mm, and 6500mm*12mm thickness), 6 SF double-layer oil tank spraying production lines, 2 FF double-layer oil tank spraying winding production lines, 3 atmospheric pressure vessel production lines, 1 pressure vessel production line, edging machines, shearing machines, automatic submerged arc welding machines, metal container heat treatment furnaces and other specialized equipment. It can process and manufacture various pressure vessel dedicated heads (hemispherical, elliptical, disc-shaped boilers) with diameters ranging from 200 to 6500mm and thicknesses from 3 to 120mm, pressure vessels, various chemical equipment, environmentally friendly double-layer oil tanks (SS/SF/FF), steel structures, skid-mounted tanks, tank lining structures, and reticulated structures, etc. It uses advanced integrated rolling and automatic welding assembly lines and complete supporting production equipment for metal processing, flaw detection equipment, and steel tank liners. It employs a steel tank forming process that integrates five processes: leveling, shearing, arc rolling, forming, and welding. Quality control is achieved through kerosene penetration, water pressure testing, and airtightness testing. The steel liner undergoes overall shot blasting, rust prevention, and painting to ensure its corrosion resistance. Testing equipment not only ensures the construction requirements of the quality of various engineering construction products but also provides excellent quality assurance for the company's products. The company has a number of senior and intermediate management and professional and technical personnel, with more than 120 employees, including more than 20 senior and middle-level managers, 10 sales personnel, and more than 90 skilled professional manufacturing and installation workers. In order to actively meet various opportunities and challenges, the company will combine the new situation with the business philosophy of "pursuing excellence, manufacturing high-quality containers, establishing the Huajin brand, and building a century-old enterprise" to achieve the company's strategic goal of "being based in Jiangxi and radiating across the country."