球墨铸铁管力学性能…Mechanical Property of DCI Pipe

　　※公称直径…DN

　　※水压实验…Hydrostatic Test

　　※抗拉强度…Tensile Strength

　　※延伸率…Elongation

　　※布氏强度…HBS

　　※内衬厚度…Liner Depth

　　T型接口球铁管重量(K9级)…Weight of DCI Pipe-T type (K9)

　　※直径…DN

　　※外径…DE

　　※壁厚…Pipe Thickness

　　※承口凸部近似重量…Socket Ledge Approximate Weight

　　※总重量近似值…Total Approximate Weight

　　K型接口球铁管重量(K9级)…Weight of DCI Pipe-K type (K9)

　　※直径…DN

　　※外径…DE

　　※壁厚…Pipe Thickness

　　※承口凸部近似重量…Socket Ledge Approximate Weight

　　※总重量近似值…Total Approximate Weight

　　T型滑入式接口图…Push-on joint (T type)

　　K型机械式接口图…Mechanical joint (K type)

　　球墨铸铁管生产流程…Production Process of DCI Pipe

　　※电炉铁水…Liquid Iron

　　※铁水净化…Liquid Iron Purification

　　※调质升温…Tempering Temperature

　　※球化处理…Spheroidizing

　　※光谱分析…Spectral Analysis

　　※离心浇注…Centrifugal Casting

　　※退火…Annealing

　　※喷锌…Zinc Spraying

　　※校圆打磨…Polishing

　　※切环抽检…Sampling

　　※水压试验…Hydrostatic Test

　　※内层涂敷…Inner Painting

　　※养护…Curing

　　※外涂…Outer Painting

　　※烘干…Drying

　　※检验包装…Inspecting and Packing

　　※成品…Final Product

　　球墨铸铁金相…Metallographical phase of DCI Pipe

　　金相显微镜…metalloscope

　　德国光谱仪…Spectroscope from Germany

　　拉力试验机…Tension Tester

　　全自动恒温应力压力试验机…Automatic constant temperature stress pressure testing machine

　　球磨铸铁管件…Fittings of DCI Pipe

　　球墨铸铁管件及附件是根据ISO2531要求进行生产和验收，采用当今世界上铸造工艺的高新技术EPC(消失模)工艺，它的几何精度、几何尺寸、表面细腻程度等各项技术指标都远远超过传统工艺。

　　DCI Pipe and the fittings are produced and tested according to ISO2531 standard, adopting the high-tech EPC, whose geometric accuracy, physical dimension, surface smooth and other technical indicators are far more excellent than that of the traditional craft.

Founded in August 2002, Shandong Longquan Pipeline Engineering Co., Ltd. is a leading business in the production of prestressed concrete cylinder pipes (PCCP) in China’s building industry. Our head office is located in Boshan Economic Development Area, Zibo, Shandong. On April 26, 2012, our company was listed as Share A among small and medium enterprises in Shenzhen Stock Exchange (name of security: Longquan stock; security code: 002671). Presently Longqian has obtained many titles, such as vice president unit of China Concrete and Cement Association (CCPA), vice president unit of Chinese Cankerous and Protection Society, vice president unit of Shandong Silicate Society, one of the organizations that involve in drafting the national and industrial standard on PCCP, and member unit of Research on Major Issues before the 13th Five Year Plan of China’s Building Material Industry. Our company has a provincial enterprise technical center and is rated as Shandong Research Center on PCCP Engineering. We have also set up the Longquan Research Institute on New Material Engineering and Technology with Beijing University of Technology, which is aimed at the design and research of PCCP featuring long service life, corrosion resistance and long efficiency. Now our company has obtained 61 patents for invention and utility model patents related to production, research and anticorrosion of PCCP.

　　Following the development concept of “market comes before factory” and “solid efforts lead to a large business; intelligence brings about prosperity”, our company takes the lead in advancing and effectively applying the innovative business model featuring “establishing factory in other cities as well as flow production” and has set the Build a time-honored enterprise in Longquan, and realize the sales revenue of RMB 10 billion. Over the years, we have successively set up four wholly-owned subsidiaries in Changzhou, Liaoyang, Fuyang, and Zibo, i.e. Changzhou Longquan Pipeline Engineering Co., Ltd., Liaoning Shengshi Water Conservancy and Hydropower Engineering Co., Ltd., Anhui Longquan Pipeline Engineering Co., Ltd., and Zibo Longquan Shengshi Properties Co., Ltd. We also set up Shandong Longquan Pipeline Engineering Co., Ltd., Henan Branch Office, Hebei Branch Office and Liaoning Branch Office in Xinzheng, Xingtai and Fuxin respectively. In addition, we have established the Pipe Installation Branch Office, Machinery Branch Office as well as three holding subsidiaries, i.e. Beijing Longquan Jiaying Railway Facilities Co., Ltd., Shandong Quanrun Environmental Technology Co., Ltd., and Guangdong Longquan Water Pipe Engineering Co., Ltd. All these contribute to a strategic layout of “base on Shandong and radiate the whole country”, which lays a solid foundation for the continuous expansion of regional water transfer and brings about desirable advantages for the company’s future development and product transformation and upgrading.

　　Since establishment, Longquan has been carrying forward the spirit of “practical work, strive to be the best” and guided under the quality policies of “Longquan pipelines, pursuit of excellence, quality first and user foremost”. Through technological progress and innovative operation, we keep opening up market and have achieved the great-leap-forward development. The “Yanshen Longquan” trademark has been rated as famous trademark in Shandong and well-known trademark of China. Our Yanshen Longquan PCCP products have been rated as “famous-brand product of Shandong”. For years, we have been crowned with many distinctions, such as advanced enterprise of Shandong Province, advanced unit of Zibo, technologically advanced enterprise, advantageous enterprise in the material industry of Shandong, and unit that abides by contract and has good faith. Now we are looking forward to having men of insight to visit our company and to maintaining extensive connection with all walks of life, so that we may embrace a bright future through mutually beneficial cooperation.