The invention provides a protective coating for oil pipes and wellheads and downhole equipment used in oil and gas drilling, oil recovery and transportation.

High-quality resources are tight and the price is high. Some mines have increased mine use, mine sales are better, traders are more active, and small and medium-sized mines are starting to improve slightly.

Q345 channel steel price market traditional sales season, and because of the "golden nine" market failure, the market will habitually think that the delay of the peak season, may eventually fall to October, so before the National Day, the market for " The Silver Ten” peak season still has high expectations, and after the steel price has been consolidated for more than a month, there are conditions for a rebound.

The steel market continued its rebound last week. In addition to the weak and weak market, other major varieties of construction steel continued to rise.

A105 is the American ASTM standard number, and A stands for ordinary carbon structural steel.

The application of galvanized flat steel has also expanded correspondingly with the development of industry and agriculture. Therefore, the enterprises engaged in the production of galvanized flat steel in China are also required to have higher requirements for the galvanized flat steel. It is also because of the high new reference price of galvanized flat steel, so the production and process requirements are also very high, so the application range and type of flat steel is also very rich. So what is the difference between galvanized flat steel and round steel?

Structural performance comparison of seamless steel tubes. Carbon structural steel pipe: This kind of structural steel pipe is generally smelted by converter or open hearth furnace. Its main raw material is molten iron and scrap steel. The content of sulfur and phosphorus in steel is higher than that of high quality carbon structural steel pipe. Generally, sulfur is ≤0.050% and phosphorus is ≤0.045%.

On June 20, 2018, the U.S. Department of Commerce announced the initial subsidy of large-diameter Welded Pipes imported from China, India, South Korea, and Turkey.

German President Merkel expressed disappointment at the decision of President Trump 10 to withdraw its decision to endorse the joint communique of the group of seven Summit (G7) summit. Merkel also said that the EU would take counteraction measures to impose tariffs on steel and aluminum in the United States.

In the morning of 29 Beijing, the Canadian International Trade Tribunal said on Monday that it had launched a preliminary antidumping investigation of steel imported from China, South Korea and Vietnam.

In the past week, it has risen by 100 yuan/ton continuously. In December, the steel export of steel mills will be reduced. At that time, the domestic market will increase, and the pressure on the downstream steel companies or traders will increase.

Futures and spot plunging to today have many reasons overlapped, but falling to a certain extent, bottoming out should also be said to be a natural law of the market or a general trend.

The trading atmosphere of the thick-walled seamless steel pipe market continued to decline from last week, and it continued to fall due to the policy of the mainstream first-tier manufacturers last weekend.

Seamless steel pipes have become very common in life, so do you know that seamless steel pipes can be divided into several grades?

After the heat treatment of the 45# seamless steel pipe, it is necessary to wait for it to cool before proceeding to the next step. The cooling method of 45# seamless steel pipe changes with the change of its manufacturing materials. For most steels, natural cooling can be used. For some special 45# seamless steel pipes, to ensure its Organizational state, physical properties and mechanical properties are developing in the expected direction, and certain methods and systems must be adopted.

　　The chemical composition specified in the general standard refers to the smelting component. It refers to the chemical composition of the 45# seamless steel pipe after smelting and pouring. In order to make it representative, the analysis is carried out according to the specified standard method (GB/T223). The results must conform to the standard chemical composition range and be the basis for customer acceptance.

The primary industry and real estate formed support for investment in January-February. The national fixed asset investment (excluding farmers) was 444.6 billion yuan, a year-on-year increase of 7.9%. The growth rate was 0.7 percentage points higher than the previous year, which was higher than the market 7%. expected. In this regard, many institutions believe that mainly due to real estate investment and investment in the primary industry exceeded expectations.

The crude steel output is growing too fast. The oversupply pressure in the steel industry shows that under the background of high steel prices, steel companies have begun to increase their productivity.

Proceso de producción de tubería de acero con costura recta (LSAW) de soldadura por arco sumergido d

In general, with the end of the "two sessions", the domestic coking coal production will be gradually released in the later period, but the coking coal stocks of steel mills and coking plants are not at a relatively low level, and the focus enterprises in Hebei and Shanxi have environmental protection limits.

　From 2017 to 2018, as the downstream steel market gradually lost from loss to obvious profit, the ferroalloy industry has considerable profit margins.