Dongpengboda Group is located in Daqiuzhuang, Tianjin, which is the biggest welded pipe production base in the world.
East: 50 kilometers away from Tianjin Port ,40 kilometers away from Tianjin Binhai International Airport.
South: 1kilometer away from Danla expressway.
West:8 kilometers away from Beijing-Shanghai expressway.
With sea, land and air transportation. It’s very convenient .
Our group is founded in 2006, and the register capital is 208 million RMB. It has three subsidiary companies: Tianjin Tianfeng Steel Pipe Co., Ltd; Tianjin Tianwang Steel Pipe Co.,Ltd; Tianjin FWS Trading Co., Ltd; Dongpengboda (Tianjin) Industrial Co., Ltd. After years of hard work, we have formed a diversified investment pattern of development, and in accordance with the requirements of new industrialization, we have given full play to their own advantages to achieve the scale, structure, quality and efficiency overall promotion.
Group companies have a professional production of galvanized round pipe, galvanized square and rectangular pipe, hot rolled square and rectangular steel pipe and other various types of steel pipes. We have a total of 17 steel production lines, which have advanced technology and equipment and are all controlled by computer. Production process is in strict accordance with the ISO9001 quality management system, and steel pipe can be customized in GB, American standard, British standard, European standard, Australian standard and Japanese standard. Therefore our product quality has reliable guarantee and can be exported to North America, South America, Europe, Middle East, Southeast Asia, Australia and many other countries and regions. The annual output is 88 thousand tons. Products are widely used in many fields such as vegetables, nursery seedling greenhouses, threading pipe, steel liner tube in family decorate, construction steel structure, ship machinery, container, steel-wood furniture, bridge structure and so on. Besides, we also export hot dipped galvanized pipe, cold rolled steel pipe, petroleum casing pipe, seamless steel pipe, shaped pipe, galvalume steel coil, PPGI, corrugated sheet, PC strand. The annual sales reach 3.8 billion RMB.
Dongpengboda (Tianjin) Industrial Co., Ltd, a subsidiary company of Dongpengboda Group, was founded in December of 2010, and its registered capital was 50 million. We have 9 production lines of galvanized round, rectangular and square pipes. The annual output reaches 400,000 tons.
Tianjin Tianfeng Steel Pipe Co., Ltd
Tianjin Tianfeng Steel Pipe Co., Ltd is a subsidiary company of Dongpengboda Group. It was founded in March of 2006, and its registered capital was 58 million. It has 2 hot rolled rectangular and square steel pipe production lines. The annual output of various types of hot rolled rectangular and square steel pipes reaches 200,000 tons.
Tianjin Tianwang Steel Pipe Co., Ltd
Tianjin Tianwang Steel Pipe Co., Ltd is a subsidiary company of Dongpengboda Group. It was founded in December of 2006, and its registered capital was 50 million. It have 4 hot rolled rectangular and square pipe production lines. The annual output of various types of hot rolled rectangular and square steel pipes reaches 500,000 tons.
Tianjin FWS Trading Co., Ltd
Tianjin FWS Trading Co., Ltd. is a subsidiary company of Dongpengboda Group. It was founded in December of 2008, and its registered capital was 50 million. It has independent import and export rights in goods and technology. The company mainly exports galvanized round pipe, galvanized rectangular and square pipe, hot rolled rectangular and square pipe and other kinds of steel pipes. Other mainly export products are Hot-dip galvanized steel pipe, cold rolled steel pipe, petroleum Casing, seamless steel pipe, special-shaped pipe, galvalume steel coil, color coated coil, corrugated board and PC strand.
Low resolution DNS using the projection method based on the “Stable Fluids” algorithm of Jos Stam. Here I have improved it to be 4th order in space with a two-stage pressure correction, significantly reducing false diffusion. 10% vorticity confinement was used to energise the vorticity at all scales to simulate a higher Reynolds number “turbulent” flow (recall there is no real turbulence in 2D due to the absence of vortex tube stretching and tilting since all vorticity vectors are in the same plane). Coded in VB from scratch, no external libraries. Colouring represents the concentration of a passive scalar continuously replenished on the surface of the object and advected with the local flow.
Note the tilted large-scale structures moving along the plate, also note the backflow near the surface towards the leading edge. Further along the plate the surface flow goes forward again (on average), thus there is a separation bubble at the leading edge. Again, the large-scale outer motions are generated by the Kelvin-Helmholtz instability on the shear layer formed by the leading edge separation.