【Ten Years of Rapid Development in Chemical Processing Equipment】DN4000 Continuous-Wound Fiberglass-Reinforced Sand-Lined Pipes from 1975 to 2022
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Witnessing the ten-year rapid development of chemical processing equipment, I praise the prosperity and strength of modern China. Wishing everyone a safe and happy New Year! In an effort to stimulate further discussion, we welcome everyone to participate more actively in the forum exchanges. Replies will be rewarded; discussions are encouraged. ------------------------------------------------- In 2022, Lutong Corporation’s Dongshan factory successfully began mass production of DN4000 continuous-wound fiberglass reinforced sand-filled pipes (referred to as CWFP pipes), with a daily production capacity of nearly 100 meters. This pipeline is the result of Lutong Co., Ltd.’s continuous efforts to promote the practical use of ultra-large-diameter CWFP pipes, following its success in producing China’s first DN4000 CWFP pipe in 2016 and thus filling a gap in the domestic market. It represents another milestone for the company, building on its previous achievements in the practical use of DN2800, DN3200, and DN3600 CWFP pipes in recent years. It is reported that this pipeline is intended for use in the seawater discharge system for the circulating water of the power plant operated by Guoneng (Quanzhou) Thermal Power Co., Ltd. It has a hoop stiffness rating of 10,000 Pa, features a double-pipe arrangement, and has a total length of over 2,000 meters. The installation was carried out by the Guangzhou Salvage Bureau under the Ministry of Transport, with completion expected by the end of 2022.
Glass fiber reinforced plastic continuously wound sand-filled pipes are third-generation composite pipes with a three-dimensional reinforcement structure, manufactured using 3D printing technology and a continuous winding process. It boasts advantages such as light weight and high strength, corrosion resistance, long service life, as well as stable and reliable performance. These products are widely used in various water transfer projects, including large-scale water diversion projects, municipal water supply and drainage systems, and seawater intake and discharge systems.
Product features: 1. The pipe structure offers high design flexibility； 2 Corrosion-resistant and aging-resistant, with a service life of 50 years or even over 100 years ； 3 The inner wall is smooth, with stable hydraulic properties; the Manning roughness coefficient is 0.00848 ； 4. It has excellent hygiene properties; food-grade resin is used to ensure compliance with the requirements for water quality in domestic use ； 5 Good wear resistance ； The 6-sleeve joint is safe and reliable, with fast installation speed ； 7 pairs have strong adaptability to the water hammer effect ； 8 Light in weight and high in strength, easy to transport and maintain ； The CWFP pipe addresses the issues of high weight, poor corrosion resistance, and short lifespan associated with concrete and metal water conveyance pipes, while also avoiding the problems of low strength, significant creep, and poor aging resistance found in thermoplastic pipes.