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A.Features: generally appear in the steel both ends, was flash-like, burr-like, irregular distribution of the end of steel B.Causes: When cutting the material, due to the saw blade wear serious or the improper adjustment of the saw blade, result the flash and burrs appear at both ends of the steel.

Today's futures market continued yesterday's good start, continue to show in the rally, which rose the largest coke, in traday rose to 3.01%, hot rolled coils and deformed steel bar continues to go high, iron ore tightly follow.Anyway, the market is still a flush on the right, if no accident this week will continue to rise in the trend of closing. But the current message side has become relatively cautious, mostly in the lower reaches of the wait-and-see, but the steel mills seem to have their own ideas, every day there are different steel mills announced price adjustment news, today, Wuhan Iron and Steel introduced in August 2017 Product price policy, the main types of steel prices were raised, most varieties reached a maximum of 300 RMB / ton. Today's futures market continued yesterday's good start, continue to show in the rally, which rose the largest coke, intraday rose to 3.01%, hot volume, thread continues to go high, iron ore tightly followed, anyway, the market Is still a flush on the right, if no accident this week will continue to rise in the trend of closing. But the current message side has become relatively cautious, mostly in the lower reaches of the wait-and-see, but the steel mills seem to have their own ideas, every day there are different steel mills announced price adjustment news, today, Wuhan Iron and Steel introduced in August 2017 Product price policy, the main types of steel prices were raised, most varieties reached a maximum of 300 yuan / ton.

November 2015,China Petroleum and Chemical Industry Federation of suppliers working committee launched the oil and chemical industry procurement service platform static seal industry qualified supplier statistical analysis work, according to the enterprise reporting materials, in the open, fair and impartial principle By the review committee assessment, the development of 17 static seal production enterprises for the oil and chemical industry procurement service platform for the first batch of static sealed industry qualified suppliers (see table below, ranked in alphabetical order by name) http://www.derbosteel.com/news_detail/newsId=142.html

June 27 futures market continues to rise steadily, tough attitude, billet cost is strong support, has been stained with a high of 3200, the current market is no longer too much to consider the demand side of the problem, simply demand in the off-season seems less important , Steel prices unilaterally to rise, and the production of steel did not stop, production speed up, production is to catch up with the consumption of inventory. The spot market continues to rise for futures market stabilized driven, the price rose larger, the steel market out of the season even better than the market during the entire off-season , people are also a little faint faint concern, after all, trading volume placed there,the end supplier seems to be a little "disregard" of the problem. From the ground to the limit of steel two days left, a comprehensive ban on the end of the work, follow-up also need to strengthen the supervision of the work to prevent "resurgence" zombie enterprises appearing. June is really a memorable month, the Fed to raise interest rates, to complete the task of steel, steel prices rose sharply. it is not difficult to understand why people looking forward to July, there are billet and low Inventory supporting, steel prices are fairly stable, but there are risks to everything, people should not rely on a single thing to bring income, and also need to defense the behind risk.

Seamless steel pipes with small diameters can be called small bore seamless steel tubing, which can be divided into seamless small bore steeltubing and straight seam (also known as welded) small bore steel pipes. Generally, seamless steel pipes with diameters from 4mm to 89mm can be collectively called small bore seamless steel tubes. Large diameters seamless steel pipes refer to seamless steel pipes with diameters greater than 325mm, and large diameter seamless steel pipes can also be divided into hot-rolled large bore seamless steel pipes and thermal expansion large bore seamless steel pipes which can be produced not just in the sizes of Chinese standard. Thermal expansion seamless steel pipes often have relatively low density but strong contraction. The finishing processes such as rolling and drawing are adopted to expand the diameters of thermal expansion seamless steel pipes. These processes can thicken the walls of within a relatively short period of time and can help produce special types of Seamless tubes with low costs as well as high production efficiency. According to different production methods, seamless pipes can be divided into hot-rolled pipes, cold-rolled pipes, cold drawn pipes and extruded pipes. Generally,hot-rolled seamless pipes are usually produced through the automatic tube rolling mills and their production process consists of the the following steps. Check the solid billets, repair the defects on the surfaces and cut the solid billets into those with the required length; determine the centers of the billets' perforation end faces and sent the billets to the heating furnaces to heat them; punch holes on the billets through the piercing mills, continuing to rotate the billets and making them forward during the perforation process; under the action of rolling, the cavities gradually form inside the billets, which makes the billets gradually become the hollow billets; sent the hollow billets to the automatic tube rolling mills to continue rolling them; sent the hollow billets to the reeling mills to reel the wall thickness of the hollow billets and then sent them to the sizing mills to determine their diameters, making them reach the requirements of specifications. The continuous rolling mill process is an advanced method to produce the hot-rolled seamless steel pipes. If we want to produce seamless pipes with smaller diameters and better qualities, cold-rolled process, cold drawn process, or a combination of both processes is supposed to be adopted.

The price of the stainless steel pipe has always been a matter of concern to customers. Sometimes, customers ask why the prices of the stainless steel pipe with the same specification are different in different places. Now, we are going to tell you the reasons for the different prices of the stainless steel pipes & tubing with the same specification. 1. Differences in materials: For example, the 304 material includes 304 material used in the medium frequency furnace and 304 material used in the refining furnace. If a pipe mill mixes part of the 304 material used in the medium frequency furnace with that used in the refining furnace or offers the prices of the 304 material used in the medium frequency furnace for the customers but provides their customers with the 304 material used in the medium frequency furnace, there will be some discrepancies in the prices of stainless steel pipes. 2. Differences in administrative cost: The cost of different stainless steel pipes & tubing will vary from each other because of the different cost of administration, factory, workers and the rent of the factory. 3. Differences in inventory cost: Excess inventory of stainless steel pipes will cause the increasing of the cost and the low velocity ratio of the capital, which will finally lead to the little profits of companies. The serious imbalance between sales and inventory will also increase the companies' production costs. Many customers will ask why the stainless steel pipes' prices do not fall down the day when the prices of the steel drop. This is because the factories' inventory of steel pipe and steel decide the prices they offer. Thus, some of the plants will not cut prices of stainless steel pipes & tubing as soon as possible when the prices of steel drop. It is also related to the cost of factories and not the credit problem of the factories themselves. Sometimes, factories need to transfer the goods. However, prices of pipes with great thickness and the uncommonly used specifications are usually high, because the sales volume of these pipes is not as high as that of the conventional pipes and these pipes have already been stored for a long time, leading to the relatively high costs of stainless steel pipes. 4. Differences in fixing the prices: Different companies' standards of fixing the prices of stainless steel pipes may be different from each other. 5. Differences in production cost: Comprehensive factors including the cost of different factories, facilities, personnel, production management result in the discrepancies in the rates of finished products. If there is a high proportion of waste, the cost will certainly become high. Why are the prices of thin pipes, small pipes and pipes with special requirements usually high? That is because the yield of these pipes is small per unit and the cost of the labor consumed per unit is relatively high.

Steel plate,steel bar and bolt Material is SUS304,NBR/EPDM rubber,Pressure 1.6Mpa pipe clamps Follow is the details for your reference. NO. Pipe OD MM Size INCH Length MM U.Price USD/PCS U.Weight KG/PCS Quantity PCS T.Weight KG Amount USD 1 20 1/2 57 23.50 0.16 10 1.6 235.04 2 28 3/4 57 23.50 0.22 10 2.2 235.04 3 34 1 57 27.03 0.24 10 2.40 220.47 4 48 11/2 57 27.03 0.43 10 4.30 220.47 5 60 2 80 31.73 0.68 10 6.80 258.27 6 76 21/2 80 36.93 0.76 10 7.60 300.79 7 89 3 107 45.33 1.52 4 6.08 368.50 8 108 4 107 50.03 1.56 6 9.36 407.87 9 159 6 116 67.66 2.54 5 12.70 552.76 10 219 8 155 99.05 5.02 5 25.10 807.87 Total Amount $3012.33 Total Fob TO Cebu from Zhengzhou Airport With one 500*500*600mm Wooden Case by DHL 100KG (With Wooden Case) $3651.60

This Friday Rubber Seat for butterfly valve will be transported to Nigeria by freight Below is the details for your reference! 1.Rubber Seat for butterfly valve material: NBR 10"(DN250) 150# 500pcs 2.Rubber Seat for butterfly valve material: NBR 16"(DN400) 150# 500pcs Any inquiry please feel free to contact us,we will supply the best price to you in two hours.

Important Notice:Secretary of the Central Party Committee are inspecting Tianjin.From today all the galvanized steel mills and pickling mills are forbidden to produce! The new produce time is waiting for notification. All the steel pipe and pipe fittings price is raising sharply now!

We Chengdu Derbo Steel just export API 5CT oil tubing ro Australia, this order is the fourth tubing pipe this customer ordered from our company,and there are two orders from his colleagues .Thanks for my partner also my friend and our prime oil tubing.

Under the guidance of national industrial policy, it was expelled from galvanized steel water pipes market, various forms of new pipe has been booming, especially plastic pipes (including aluminum-plastic composite pipe, plastic composite pipe, PPR pipe, etc.) its low price, easy installation, etc., in the country been more widely used. But plastic pipe on the temperature difference, environmental health and life, there are insurmountable defect itself. Various modifiers of plastic pipe, auxiliaries and additives, which are collectively referred to as the cause of human-induced change of the environmental factors, such as an organ of the human body caused by human factors need to be positive in-depth study to explore. Plastic pipes susceptible to sun ultraviolet light Xie, accelerated aging. Some flexible plastic tube is not suitable for indoor for surface, thermal expansion and contraction bent. Concealed within the tube hole there, embedded in the ceiling wall or embedded in the leveling layer, the inner tube lined with aluminum, cement due to corrosion should not be buried or embedded in the wall installation. So without modifiers plastics and chemical composition of the surface coating of heavy metal or metal molecules manage their health properties. Thus, copper pipes, stainless steel pipes and other metal pipes began coming into view. Among them, the thin-walled stainless steel tube with superior safety and reliability, environmental health, economical and so on, has become a new choice water pipe. Stainless steel is a recognized health can be implanted in the body material, stainless steel pipes for the materials in the developed countries have many years of successful application records, and has become the world trend and direction of development. Stainless steel pipes are called "21st century truly green pipe." Stainless steel pipe has the following outstanding advantages: 1. Excellent mechanical properties, superior wear resistance. Chromium-rich oxide film on the surface of the stainless steel thin, dense, making the stainless steel pipes in all, including water quality including water softeners are having good corrosion resistance, even if buried underground also has excellent corrosion resistance. 2. Excellent corrosion resistance Stainless steel pipes can withstand up to 30 m / s high-speed water erosion, with a high head hydropower diversion of stainless steel pipes, water nozzle end speed of 60 m / sec or more, still more than 100 years of life. Stainless steel pipe material is greater than the tensile strength of 3.304 530 N / mm, is 2 times the galvanized pipe, copper tube 3-4 times, 8-10 times PPR pipe, but also has good ductility and toughness. 4. help conserve water, looks beautiful, clean, stylish, 100% recyclable, good health and safety performance, good heat resistance, good insulation properties, water resistance smooth wall small. 5. Stainless steel long-term job security at a temperature of -270 ℃ -400 ℃, whether high or low temperatures, will not precipitate harmful substances, materials performance is quite stable. 6. cold rolled coil market stainless steel pipes, wall smooth, water resistance is very small, at low water flow resistance is only 2/5 of steel pipe, reducing the pressure loss, reducing transportation costs, and health, can not easily be bacteria dirt, not fouling. 7. The insulation properties of stainless steel pipes is 24 times the copper tube, reducing heat loss, particularly suitable for hot water delivery. 8. not cause environmental pollution, environmental protection, contribute to sustainable development, and stainless scrap have great economic value. 9. A stainless steel safe non-toxic, non-corrosive and exudate, odor or turbidity problem, not cause secondary pollution to water quality, keep the water pure health, health security completely guaranteed. 10. help to improve the quality of city buildings can be surface mounted, can also be concealed, may also be buried underground. 11. can be used for municipal water supply pipe network, pipeline direct drinking water, water transport, high-grade building water supply, heating and hot water pipes, steam pipes and cold regions outdoor high-speed, city fire water supply, pumping stations and other occasions. 12. The high strength stainless steel pipes, which greatly reduces the likelihood of leaks affected by external force, significantly reducing water leakage rate, so that effective protection of water resources and utilization. 13. The use of a wide range of long life and low overall cost. Field corrosion test data indicate that the life of stainless steel pipes up to 100 years, almost no maintenance over the life cycle, to avoid the expense and hassle of replacement pipeline, low operating cost, integrated use of cost (calculated in 50-year life) only 1/4, 1/2 brass 1/2 galvanized pipe, high-quality PPR pipes.

Board of Directors from Mountain Hydro Nepal Visited Derbo Steel for business cooperation. In order to purchase steel pipes for hydro power station in Nepal, Mountain Hydro Nepal send its Board of Directors came to meet management of Derbo Steel. Both parties have concluded initial agreements on steel pipe supply and hydro power construction. Here, we want to express our sincerest gratitude for Nepalese clients to give the great opportunity to cooperate with them. Derbo Steel will continue to devote great effort to offering superior products and professional service.