steel tube

 　　In March 2021, Xinyue received an inquiry from a new customer. After communication and understanding, the customer was an Australian racing track manufacturer. The product required was galvanized rectangular pipe with the specification of 65mm * 65mm * 3mm * 6000mm, which was used for a local racing track project. Although galvanized rectangular tube was one of the advantage product of Xinyue, it had been successfully sold to all over the world for many times. However, due to the tight construction period of the project, the delivery date given by the customer was also very short, and it was clear that the next negotiation can be carried out only after satisfying this prerequisite. We understood the customer's demand, and promised the customer that our company had a professional steel base, so that we can fully met the customer's delivery demand. Our sales engineer submitted the supply plan to the customer on the same day, dispelling the customer's doubts about the deliv...

 　　On March 27, 2017, the inter-ministerial joint meeting of the iron and steel coal industry to resolve excess capacity and overcome difficulties in development work held a steel and iron reduction work conference in Beijing. The meeting requested the steel industry to carry out supply-side structural reforms, and put forward the goal of resolving 50 million tons of excess capacity in 2017. Overall, during the "13th Five-Year Plan" period, the steel industry has achieved remarkable results in controlling production capacity. 　　In 2020, my country has achieved major strategic results in the fight against the new crown pneumonia epidemic. In the second quarter of that year, my country's economy began to recover quickly and gradually returned to the pace of development before the epidemic. In particular, infrastructure investment greatly increased my country's crude steel consumption. That year, my country's crude steel output reached 1.065 billion tons, a year-on-y...

 　　The single-day decline was close to 7%, and the lowest fell to around 720 yuan/ton. The price of high-grade mineral powder in the spot market fell sharply, and the price of incoming card powder fell to around 1100 yuan/ton...the iron with the strongest gains in the first half of this year After entering the second half of the year, the price of ore continued to fall, and has now hit a new low in the past 14 months. 　　The sluggish performance of iron ore prices is mainly due to the steady progress in the reduction of crude steel output in the domestic steel industry. The shrinking of the steel supply side has effectively blocked the iron ore demand space, and the iron ore futures market is bearish. The spot market also started a "high diving" market, squeezing the "price bubble" that caused the irrational rise in iron ore prices in the first half of this year. 　　So, will the "falling" iron ore "slow down" the rise of steel prices in the peak se...

 　　Since September, the situation of the steel market has gradually become clear, and it has got rid of the influence of the downward pressure on the economy and the decline in real estate data in August, and the overall situation has shown a slight upward trend. Steel production continued to decline, and the construction industry demand, which was affected by factors such as the new crown pneumonia epidemic and flood conditions, gradually recovered, and demand began to show a seasonal rebound, creating a good operating environment for the steel market. On the whole, the fundamental operating logic of the steel market is still affected by the two-way effect of increased production cuts and the rebound in demand during the peak season. It is expected that the steel market may still form a mismatch between supply and demand during the year. 　　Production restriction policy has been stepped up, and output continues to decline 　　Due to the intensified implementation of the production re...

 　　API Round Thread 　　There are short round thread casing and the long round thread casing points. There are some advantages about round thread casing as follows: 　　1. Improve the abrasion caused by resistance when the thread tightening 　　2. Tighten the screw, the tooth tip provides a reasonable space for foreign particles and dirt 　　3. The circular arc tooth is not sensitive to local scratch or dent damage 　　Round thread due to its easy processing, good sealing performance and low price, is widely used in casing connection. In addition, it’s simple in site maintenance and use. In the test of different specifications of the round thread casing, use appropriate specifications of the thread gauge to test, when necessary carries on corresponding processing to the data. 　　Buttress Thread 　　In oil field tubing, buttress thread is a pipe thread form designed to provide a tight hydraulic seal. The thread form is similar to that of Acme thread the force is transmitted almost parallel to th...

 　　1) The influence of welding current on weld formation 　　Under certain other conditions, with the increase of arc welding current, the weld penetration depth and remaining height increase, and the penetration width increases slightly. The reasons are as follows: 　　1. As the arc welding current increases, the arc force acting on the weldment increases, the heat input of the arc butt weldment increases, and the position of the heat source moves down, which is beneficial to the conduction of heat to the molten pool and increases the penetration depth. The penetration depth is approximately proportional to the welding current, that is, the weld penetration depth H is approximately equal to Km×I, where Km is the penetration coefficient (the number of millimeters that the welding current increases by 100A causes the weld penetration to increase), which is related to the arc welding method , Wire diameter, current type, etc. 　　2. The melting speed of the core or wire of arc welding is p...

 　　The straight seam high frequency welded steel pipe (ERW welded pipe) has advanced forming technology, reliable quality, good welding position, stable welding parameters, fast welding speed and high output. The equipment and technology of the entire production line are at the current international first-class level. 　　The high frequency straight seam welded pipe mill is used to level the fixed strip after slitting line, and entry it to forming machine, bend to open pipe by roller, melt the strip edges through the high frequency current, squeeze and weld the pipe to be closed by squeeze roll. 　　Features: 　　(1) The springback and residual stress of the longitudinal high-frequency welded steel pipe are small during the forming process. 　　(2) The deformation and hardening effect is small, and the geometric dimensions are accurate after being rounded, which is beneficial to ensure the quality of construction and welding. 　　(3) Longitudinal high-frequency welded steel pipe has good wel...