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The importance of quality and safety of rubber fenders



With the development of China's shipping industry, the demand for docks and marine fenders is increasing, and the requirements for fender performance are also increasing. Among them, rubber fenders are the most widely used for good toughness and impact resistance. At present, there are many manufacturers of rubber fenders in China, and the products are mixed. Some manufacturers survive in the fierce market competition. One-sided low-price competition is the main means. They do not strictly abide by relevant standards and processes, use low-quality raw materials or use excessive regeneration. Glue to reduce costs, which poses a great potential for the safety of docks and ships. Relevant experts said that rubber fender manufacturers should strictly implement relevant national standards, strict process, enhance independent innovation capability, continuously improve product quality, and provide reliable and safe products for China's shipping industry and shipbuilding industry.

It is understood that there are many types of rubber fenders on the market, mainly including buckling type, inflatable type, laterally loaded cylindrical type (drum type), butted V type (ie type X) and flexible pile type. When designing and producing rubber fenders, manufacturers should consider the reaction forces acting on the hull and docking ship components, the deformation of the fenders after absorbing the kinetic energy of the ship, the deformation of the fenders acting on the hull, the relative stiffness of the fenders, The effectiveness of the fender energy absorption during non-positive thrust, the rate at which the fender decelerates the ship's berthing speed, the coefficient of friction between the fender system and the hull, the infrastructure investment of the fender system and the support members and their maintenance costs, the hull Many factors such as the way of contact with the fender. Users can choose different types of rubber fenders according to actual conditions. In addition to tugs and small vessels, large tonnage ships are generally not equipped with rubber fenders. When berthing, they mainly use inflatable rubber fenders to protect the wharf and hull.

Relative to the shipbuilding mainframe, shipboard and other supporting markets of the shipbuilding industry, the market capacity of rubber fenders is not very large, and the competition is fierce. Li Haijun, deputy general manager of China National Rubber (Qingdao) Industrial Co., Ltd., said that the annual market capacity of rubber fenders in China is more than 2 billion yuan, and there are 3 or 4 well-known manufacturers, mainly for backbone ports and shipbuilding enterprises. There are more customized products, so the market share is high and the benefits are good. Some manufacturers that produce more general-purpose products and thin profits can only adopt low-price competition strategies, even adopting low-quality materials or using high-grade recycled rubber to reduce costs. This is a gathering of rubber fender manufacturers in Jiangsu. Many areas are more common. Li Haijun pointed out that the low-quality rubber fenders are extremely harmful, not only have a short service life, but also cause serious damage to the docks and berthing ships once damaged.

Song Baoqing, secretary general of the Rubber and Rubber Products Standardization Technical Committee of the National Rubber and Rubber Products Standardization Technical Committee, which is responsible for the standardization and technical management of rubber fenders in China, shares the same feeling. At present, the standards adopted by China's solid rubber fenders are GB/T 21537-2008 Conical Rubber Fender and HG/T 2866-2003 Rubber Fender. The inflatable rubber fender is CB-T. 3948 Marine inflatable rubber ball and ISO17357:2002 "High pressure Floating pneumatic rubber fenders", while filled floating rubber fenders are new products that have appeared in recent years. There are no international standards and industry standards. Song Baoqing pointed out that China's various types of rubber fenders are not backward compared with foreign countries, but the uneven implementation of standards by manufacturers makes the products uneven, which brings hidden dangers to the development of China's shipping industry and shipbuilding industry. She said that adding recycled rubber to raw materials can improve the processing performance and meet the requirements of green environmental protection. As for how much recycled rubber will have adverse effects on product quality and service life, there is no quantitative analysis data, so the use of recycled rubber Can not simply be denied. However, the use of high-quality raw materials is an important basis for ensuring product quality, which is beyond doubt.

Rubber fenders are mainly used as safety protection for shipbuilding enterprises when they are used for berthing at ships. Yangzhou Yuanwang Rubber Fenders said that the quality of the products is the first. If a new ship crashes at the dock due to the quality of the rubber fender, resulting in damage to the hull, the new ship will have to be reworked or even delayed. Although the rubber fenders are not the main production facilities of the shipbuilding enterprises relative to the port, the shipyards pay more attention to the cost performance of the rubber fenders, but the quality of the products must not be ignored.

It is the only way for the standard and sustainable development of the rubber fender industry to strictly control foreign advanced enterprises, strictly enforce standards and strengthen the independent innovation capability of enterprises. Experts said that China's rubber fender producers should closely follow the development trend of foreign smart fender technology, actively benchmark and adopt advanced foreign standards, enhance independent innovation capabilities, continuously improve product performance, and strive to achieve continuous product upgrades. At the same time, we must be self-disciplined and self-reliant, focusing on reducing costs and improving product quality, and not engaging in low-price vicious competition. In addition, under the broad framework of compliance with the relevant agreements and regulations of the World Trade Organization, China should increase the standardization and implementation of rubber shipboard standards, strengthen the propaganda of the quality of rubber fenders on the safety of terminals and ships, and regulate market order. To make low-quality rubber fenders difficult to produce and no market.