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When it comes to hot dipped galvanized steel pipe, the process of hot-dip galvanizing results in a metallurgical bond between zinc and steel with a series of distinct iron-zinc alloys. A typical hot-dip galvanizing line operates as follows:
◆Steel is cleaned using a caustic solution. This removes oil/grease, dirt, and paint.
◆The caustic cleaning solution is rinsed off.
◆The steel is pickled in an acidic solution to remove mill scale.
◆The pickling solution is rinsed off.
◆A flux, often zinc ammonium chloride is applied to the steel to inhibit oxidation of the cleaned surface upon exposure to air. The flux is allowed to dry on the steel and aids in the process of the liquid zinc wetting and adhering to the steel.
◆The steel is dipped into the molten zinc bath and held there until the temperature of the steel equilibrates with that of the bath.

Technically, galvanization is a process of coating iron and steel with a layer of zinc by immersing the metal in a bath of molten zinc at a temperature of around 840 °F (449 °C). When exposed to the atmosphere, the pure zinc (Zn) reacts with oxygen (O2) to form zinc oxide (ZnO), which further reacts with carbon dioxide (CO2) to form zinc carbonate (ZnCO3), a usually dull grey, fairly strong material that protects the steel underneath from further corrosion in many circumstances. Generally, hot dipped galvanized pipe has higher steel pipe price than some other ordinary types of pipe in use due to its high manufacturing cost in the market.

For the practical applications, like other corrosion protection systems, galvanizing mainly protects steel products by acting as a barrier between steel and the atmosphere. However, zinc is a more electronegative metal in comparison to steel. This is a unique characteristic for galvanizing. Specifically, when a galvanized coating is damaged and the steel product is exposed to the atmosphere, zinc can continue to protect steel through galvanic corrosion. Besides, due to its durability and anti-corrosive properties, most of cold rolled steel pipes can be recycled and reused, which to some degree save a lot of money during the post maintenance work.

With the layer of protection, pipes can be used in outdoor areas, and can withstand the harm from some of the environmental effects. Testing and studies have revealed that the average life expectancy for galvanized steel used as a typical structure material is well beyond 50 years in a rural environment and 20-25 years or more in an extreme urban or coastal setting. In that regard, contractors can confidently use this product in project. As a professional steel pipe manufacturer in China, we are committed to manufacturing various types of steel pipe for your projects. For more information, you can contact us anytime.

According to the European Steel Review, a November edition of the European Steel Review by European parliamentarians, the price base for Steel mills in most European markets is relatively stable. Big steel mills continued to push for further price increases, but buyers barely reacted. Still, steelmakers are confident that a modest price increase will take effect in early 2018. Although the distributor has successfully digested the overinflated inventory, there is no immediate buying pressure. However, supply has tightened as a result of trade measures. This, together with solid underlying consumption, continues to support manufacturers’ recommendations.

German manufacturing continued to grow strongly at the beginning of the fourth quarter. Steel consumption remains strong and car and construction companies need a lot of steel. The import quantity is mainly limited to small tonnage. Despite the lack of competitive overseas opportunities, buyers see the availability of domestic sources as sufficient to meet their needs. Benchmark prices remained largely unchanged in November, still falling short of targets set by local steel mills.

Prices in France are relatively stable. Demand is pretty good, even though orders were low in October. Buyers, who had expected prices to fall, have resumed buying. While steel mills continue to recommend increased production, customers expect no change until the end of the year.

In Italy, most fourth-quarter deals have now been finalised and prices are on par with last month’s record. There is a certain degree of uncertainty in forward pricing. Buyers are waiting for large orders. In fact, some major service centers are still preparing for the end of the year. The new import agreement is almost nil. Offers from Turkey, India and Vietnam are close to European levels.
Despite the calm in the UK market, some service centres reported a rise in activity levels in early November. The outlook for manufacturing remains positive, but car production is slowing and construction activity is falling sharply. Resale profits continue to be a problem for distributors as lower-priced old inventories continue to play a role in the supply chain. Producers have been slow to release a target price for the first half of 2018 after noticing a recent drop in trading volumes.

Demand in Belgium is strong, and while sales are shrinking, the need to reduce inventory levels by the end of the year is taking into account. The product base value of steel strip mill is stable at present. The supplier recommends a small increase in production in January 2018. However, distributors do not believe current demand justifies further rate increases. They are already struggling with their resale margins. Import prices in third countries are no longer attractive.

Spanish manufacturing grew further in October. The demand for strip mill products is stable. The underlying value remained stable in November. Orders from local mills are unlikely to improve much in the near term. A large number of imported materials, especially cold rolling and galvanized coils,cold galvanized steel pipe , are still arriving at a time when overseas prices are very competitive. New import quotations were resumed this month. Activities at the service center are rather slow.

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While U.S. politicians often fear Chinese investment stealing U.S. jobs and threatening national security, analysts paint a different picture.

People lined up to meet Los Angeles lakers star Robery horry (right) at haier at CES 2012, a consumer electronics trade show in Las Vegas, Nevada. The Chinese appliance maker employs 350 people at its south Carolina plant.
New york-based rhodium group released the latest report shows that between 2000 and 2012 of the 600 deal to China’s direct investment in the United States to support 27000 jobs, and jobs are the five copies of 10000 years ago.
The companies in question are all U.S. subsidiaries with majority stakes in China. They do not include China’s minority interests — $8bn in investment in the us over 12 years, or indirect job creation related to the construction of factories or suppliers. China steel tube manufacturer‘s new plant in Texas, for example, is expected to employ as many as 2,000 construction workers.
China’s ofdi study on employment also found that $3.5 billion in greenfield investment, or investment in new facilities, has created 8,000 U.S. jobs since 2000.
Major job creators include wanxiang, an auto-parts maker that employs 6,000 americans, mainly in Illinois. Appliance maker haier is hiring 350 people in south Carolina. Huawei, a telecoms equipment firm, and 1500 are in California, Texas and New Jersey. And a number of people, including facilities that operate in Georgia that employ more than 130 people.
The study found that Chinese investors control the majority of U.S. companies, and that 170 deals have less clear impact on U.S. companies’ mergers and acquisitions, which is “overwhelmingly positive.”
“We can’t see the evidence of asset stripping behavior, found that most of the parent company after buying American companies in China are to maintain or increase the employees,” the rhodium group, director of research at Thilo hahnemann and rhodium research analyst Adam Lysenko wrote.
Compared with the previous owner, Chinese investors especially mild steel tube manufacturer can inject money to sustain spending during the crisis, the rapid growth of the Chinese market to obtain a better opportunity, and with China’s existing business synergies and improve the value of the us. Assets.
According to the report, even if is one of the few to buy led to unemployment, nor influenced by Chinese company assets, but the value chain structure adjustment and reorganization, in response to a cost or demand changes.
If you are interested in Tianjin steel pipe, structural steel pipe factory, please contact us.

SteelJIS relationship information, Japan gas cylinders ASTM A105 steel Seamless tube industry standard, pipes and 200 straight tee fittingsAWWA C carbon steel forgings and deceleration teeWhat PSL2BKilled steel boiler tube316L stainless steel pipesAPI 5 l is? ASTM A500, carbon steel, cold-formed welded and metal pipe China

The country produced 3,570 tonnes of nickel last September, down 0.9 per cent from August to 5,064 tonnes, according to the latest figures from Brazil’s institute of non-ferrous metals (ICZ). In the first nine months of this year, Brazilian nickel production totaled 49198 tons, up 54.8% from a year earlier.
During January September this year, Brazil exported 69.6 per cent of its total nickel output, while its nickel exports rose 80 per cent from September 2011 to 34,266 tonnes.
Meanwhile, nickel sales in Brazil’s domestic market totaled 14289 mt in the first nine months of this year, down 6.5 per cent from January September 2011.STEEL PIPE CHINA

The licensing rate for a single family was 545,000 in September. This is 6.7% and the August revision is 511,000. In September, the approval rate for units in five or more buildings was 333,000.
ASTM A53 is a carbon steel alloy used in structural steel pipes. The alloy specification is made by astm international in astm A53/A53M.
The census bureau and the housing and urban development agency announced Wednesday that private housing units granted permits to build in September grew at an annual rate of 894, 000, or 11.6 percent, from 810, 000 percent in August, or 45 percent. The percentage is 616,000 higher than estimated in September 2011.steel conduit china
Private housing began in September, growing at a seasonally adjusted annual rate of 872,000. This is more than 15 percent of the revised August estimate of 758, 000 and 34.8 percent above the September 2011 rate of 647, 000. Single-family homes started in September with a 603,000 interest rate. This is 11% of August’s revised figure of 543,000. The housing price in September was 260,000 yuan for five units or more.
In September, the completion rate of private homes rose at a seasonally adjusted annual rate of 683,000. This is a revision of more than 0.4 percent from August’s estimate of 680,000 and above 13.8 percent from September 2011’s rate of 600,000.cold galvanized steel pipe china

ApplicationsTypes and 10217ASTM A928 steelSeamless tubes classified by the standard steelSeamless tubes and pressure pipes and the use of pipesDescription are intended to be published by standardIndia as soon as possible. TubeASTM A213 T5c seamless alloy tubeASTM A213 T11 Minimum import price of alloy steel pipe

Subject items are: Carbon steel welded pipes, usually identified as standard tubes, are in nominal size range of 1/2 inches up and include 6 inches (12.7 mm to 168.3 mm OD) inclusive, various forms and finishes, usually provided to meet ASTM A53, ASTM A135, ASTM A252, ASTM A589, ASTM A795, ASTM F1083 or commercial quality, or AWWA c200-97 or equivalent specifications, including well casing, piling pipe, sprinkler and emt conduit , but excluding oil and gas pipeline piping API specifications complete, originating in or exported from the People’s Republic of China.

The material injury survey of the International Trade Tribunal of August 20, 2008 excludes the following goods and therefore is not a subsidiary cargo:

The nominal pipe diameter of steel pipe china is 1 inch, which conforms to the specifications of ASTM A53, B class, schedule 10, with black or galvanized finish, and has a pure end for fire protection applications;

The nominal pipe diameter of the pre galvanized round steel pipe  is 1/2 inches to 2 inches, and the resistance welding process is used to meet the specification requirements ASTM A53, Grade A, for the production of carbon steel pipe fittings;
Carbon steel welded pipe in the nominal diameter of 1/2 inches to 6 inches inclusive, double spray brush to meet the specifications of ASTM A252, Grade 1 to 3, specification API 5L, bevel end and random length, used as foundation pile.