Dongpengboda(Tianjin)Industrial Co.,Ltd is the top 5 of galvanized steel pipe manufacturer in Tianjin,China.
Dongpengboda group is founded in 2006, and the register capital is 205 million Yuan. It has three subsidiary companies: Tianjin Tianfeng Steel Pipe Co.,Ltd; Tianjin Tianwang Steel Pipe Co.,Ltd; Tianjin FWS Trading 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 Central Asia 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 product 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 sale reaches 3.8 billion Yuan.
We firmly believe that in support of customers and other industries in society we will provide excellent products and sincere service with advanced technology and strict management. We focus on” Quality first, Customers first”. Welcome friends all over the world come.
We have the following international standard,which can meet most of your requirement.
Square and rectangular hollow section:
Chinese standard:GB/T 6728-2002 Grade:Q195,Q235 A,Q235B, Q345A,Q345B,Q345C,
American standard:ASTM A500 and so on Grade:Gr A Gr B Gr C,
Australia standard-AS1163 Grade:C250,C350,C450,
European:EN10219 and so on Grade:S235JR S235J2 S235J0 S275JR S275J2 S275JO S355JR S355J2 S355J0 S355K2
Japanese :JIS-G3466 and so on Grade:STKR400 STKR490
India:IS:4923-1997 Grade:YST210,240 and 310
TIS:107-2533 Grade:H41 H50 HS51
Round pipe and hollow section:
As for the welding, I recorded this video in March of 2016, and have never uploaded it. Downhill progression; I am using a set current; I can very easily adjust pulse settings for a background current and peak current to come in along with a delay, but I did not do that here. I could – which I could completely change the ripple definition of the weld. I had tried to have as high of quality of pipe fitup as possible as well as high of quality of cleanliness as possible disturbance in how the puddle acts. Purge quality – I wasn’t aiming for a particularly good quality purge less than 25 ppm will be silver coloration, 30-60 will start to have light straw to yellowing, the more oxygen inside the pipe the more coloration/oxide thickness/oxidization of the metal.