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4According to the historical records of the recent four years， the zinc price in the first quarter was generally higher than that in the whole year， and generally entered a wave of upward trend in the first quarter. However， zinc prices continued to decline in the first quarter of ， and showed a trend of accelerating the decline day by day. There are two key reasons for the beginning of this year. First， the vicious change of the real estate industry has led to a rapid decline in the growth rate of China&#;s consumption of galvanized pipe and seamless steel pipe，Products Show and even a contraction month on month; Secondly the blind expansion of galvanized pipe factory confused the sense of rhythm of supply and demand balance.
oSean fugosLast week，San AntonioCombien coûte I - bar?Connaissances liées à la classification des produits the billet in North China market showed a slight rebound trend. The billet quotation in Tangshan， the leading city， rose first and then stabilized in four trading days， with a strong wait-and-see atmosphere in the market. Affected by the almost stagnation of festival procurement， Tangshan billet fell by yuan during the Dragon Boat Festival holiday. On the first day after the festival although the phase snail is still running at a low level， due to the small billet resources in the market， the steel mills unexpectedly rose， and the billet market rebounded. However， due to the continuous increase of capital pressure and the downturn in the transaction of downstream finished materials，Products Show the steel plant has always maintained a cautious wait-and-see attitude to maintain stability.
Because the zinc coating has excellent ductility， it can be formed by cold stamping， rolling， can be reused on mechanical equipment， no memory， anti-static.
JsDue to the impact of poor visual . Only through the application of mesh and the overall stiffness can we see the potential of demand. The application of steel data is a high one， such as the reuse rate of mesh and reinforcement installed in the current mesh production company and the treatment of corrosion. The design strength value of circular reinforcement and the design strength value of welded reinforcement mesh. According to the equal strength substitution principle and considering comprehensive factors， the use of steel welded mesh plate can save the use of steel bars in the steel welded mesh plate factory. And the reinforcement mesh needs to be processed after it is shipped to the site， so there is no wear.
Chromium can improve the hardenability and wear resistance of steel， and improve the corrosion resistance and oxidation resistance of steel
When excavating a tunnel in a stratum where the rock is not hard and complete，Products Show it is generally necessary to excavate a diversion pit (also known as pilot hole) and set temporary support.
tI-beam has the dual properties of high hardness and toughness materials. Compared with other engineering wear-resistant materials in China， such as various alloy steel plates，San AntonioCombien coûte I - bar?Connaissances liées à la classification des produits cast wear-resistant plates， cast stones， rubber， polyurethane， etc.， it has irreplaceable comprehensive excellent properties.
EAccording to the section shape， the steel pipe is divided into:
OOK or not?Cutting machine， electric hammer，Reinforcement, galvanized pipe, seamless pipe, welded pipe, alloy pipe, I-beam-Shandong Kaiwen metal material Co., Ltd etc
nQRecently， the price of zinc has been falling continuously. The key reason lies in the soft skin of galvanized pipe consumption and the slow start of production and marketing rate of manufacturing industries in the middle and lower reaches after the Spring Festival. The disadvantage of zinc price has long been far beyond the level of cyclical factors. The main performance of no prosperity in the hot season is whether the market situation in the off peak season will become a more worried problem in the galvanized pipe sales market.
What are the advantages of seamless pipe?
There are several ways to clean galvanized pipes
assetstFirst， the wall thickness of high-quality and smooth steel is particularly thick. Because the thicker the wall thickness of the product， the higher the economy and practicability. The thinner the wall thickness， the greater the processing cost and opportunity， and the higher the resource cost. Secondly， the process of smooth steel also determines its limitations. Generally smooth steel has low precision， uneven wall thickness， low brightness inside and outside the pipe， high length cost， pockmarks in the internal appearance， and black spots are not easy to remove. Again， the inspection and shaping need to be processed offline. Therefore， it has its advantages in high pressure， high strength and mechanical structure materials. In the process of use， we will gradually find out. In fact， seamless pipe has also entered the market in recent years. With the growth of market demand， the advantages of seamless pipe have also been stimulated. But there are also many fakes and fake products on the market. Be careful when you choose.
DThe high-temperature passivation treatment of alloy pipe is to obtain the passivation treatment film by heating in the heat treatment equipment. Before passivation treatment， the surface layer of parts must be removed to remove waste. At a higher temperature， the passivation treatment film can be obtained according to the transformation temperature and time. The hue of passivation treatment film can refer to the annealing color of alloy pipe， and the main parameters of ambient temperature and time of heat treatment process can be selected.
Operating conditions
eSean fugosWhy are galvanized pipes so good?
rI Pipe installation
Spiral seam submerged arc welded steel pipe for general low-pressure fluid transportation (SY / t- is a submerged arc welded steel pipe for general low-pressure fluid transportation such as water， gas， air and steam， which is made of hot-rolled steel strip coil as pipe blank， often warm spiral forming and double-sided active submerged arc welding or single-sided welding.