The cross roll piercing and pilger rolling process in the size range from approx. 250 to 660 mm outside diameter. Generally the billet is plastically deformed at a certain temperature environment, through a dedicated mold, the metal to produce a continuous smooth flow of the process to achieve the deformed geometry requirements. Perforation is to wear a circular cross-section billet deformation tube made of wool.

There may be hundreds of different ways of packing pipes, most of which have advantages. But there are two principles that are essential for any rust prevention and maritime transport safety.

Seamless pipes are widely used in nuclear devices, natural gas, petrochemical, shipbuilding and boiler industries. Seamless pipe occupies 65% of the market share of China's boiler industry.

DIN 17175 steel pipe is used for boiler installation, high pressure pipeline and oil tank structure and special machinery for high temperature and high pressure equipment.​

DIN 17175-79 alloy steel pipe is just a big class,and it has many classifivations. We mainly produce DIN 17175 ST35.8,DIN 17175 ST45.8, and 10CrMo910 steel pipes.

Inner packing:Caps on two ends of every pipe Packing: Bare/bundles/crates/crate protection at the both sides of tubes or as per customers’ requirements . Surface treatment:Oil-dip, Varnish, Passivation, Phosphating, Shot Blasting. Marking: as per customer’s requirement

The seamless tube used for heat exchanger is one of the components of the heat exchanger, and is placed in the cylinder for exchanging heat between the two media. It has high thermal conductivity and good isothermal properties. It is a device that can quickly transfer heat from one point to another, with little heat loss, so it is called a heat transfer superconductor, which has a thermal conductivity of several thousand times copper.

We are the leading company to successfully handle alloy steel seamless pipes and alloy seamless pipes. In addition to carbon, they also contain large amounts of nickel, manganese, chromium, silicon, tungsten, vanadium and molybdenum. In addition, these also add limited elements, such as sulfur, silicon, manganese and phosphorus, which help to increase. The hardness of the pipe The strength of the pipe Chemical resistance of pipes

introduce The alloy steel is specified by the AISI four digit number. They are more responsive to mechanical and heat treatment than carbon steel. They contain different types of steel whose composition exceeds the limits of B, C, Mn, Mo, Ni, Si, Cr and Va in carbon steel.

Standard Specification for ASTM A795 for black and hot dip galvanized (Galvanized) and seamless steel tubes for fire protection

The circular steel tube is a hollow concentric circular section steel tube with both ends open, and its length is relatively larger than its circumference. It can be used in pipes, thermal equipment, machinery industry, petroleum geology drilling, containers, chemical industry and special applications.

1, water supply and drainage Building water supply system can be divided into living water supply system, production water supply system and fire water supply system according to its application. These three kinds of water supply systems are not necessarily separately set up, usually two or three kinds of water supply systems. The building drainage system collects water used by buildings in daily life and industrial production, and drains them out in time. According to the nature of sewage discharged from the system, the internal drainage of buildings can be divided into domestic sewage, domestic sewage, industrial waste water and roofing. Rainwater, sewage (wastewater), industrial waste water and rainwater are set to discharge pipes, known as diversion systems; two or more types of combinations in a pipeline are called combined flow systems; the requirements for different forms according to the water quality conditions and locations are determined after technical and economic comparisons.

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.

Industrial pipeline is an industrial pipeline. Industrial pipelines can be further subdivided into process pipelines and power pipelines. In general, the flow pipeline refers to the pipeline that directly conveyed the main material (medium) of the product, also called the material pipe, and the power pipeline refers to the pipeline that conveyed the power medium for the production equipment such as steam pipe, air pressure pipe, nitrogen pipe, cyclopentane and other production equipment. Paraffin pipes, oxygen pipes, etc. Power lines affect the normal operation of production.

Resistance welding is to clamp the workpiece between two electrodes and apply a current. The current is heated to a molten or plastic state through a resistance heating effect flowing through the contact surface of the workpiece and the current in the adjacent region to form a metal. A combination of methods. The welded pipe made of resistance welding is called the resistance welded pipe (ERW pipe).

The non-uniform deformation of the seamless tube forming and welding reduces the residual stress caused by the forming and welding of the tube, improves its distribution and improves the overall mechanical properties of the steel pipe. These changes should be fully taken into consideration when developing seamless steel tubes. The width, length and thickness of the pipe sheet should be taken into account, and the outer diameter of the steel pipe before expansion should be considered, so that the geometric size of the steel tube after the diameter expansion can not reach the final requirement. For different grids, the cold expansion path also has the effect of improving the straightness of seamless pipes, especially the straight-line effect of small diameter seamless steel tubes is more obvious.

Seamless steel pipe is more boring and stricter in the production process. Seamless steel pipe is one of the most important steel pipes. It is necessary to carry out repeated tests in the process of production, to develop and produce, to make the performance of the pipe and the use of seamless steel pipe, and to make the best use of its various applications and to make use of engineering and processing. The seamless steel pipe in the development and production process is to carry out some tests, here is mainly to explain the flatting test, is a seamless steel tube factory physical and chemical workroom for seamless steel pipe research, a more important test. What are the common methods and steps for testing?

Cold drawn steel is a common machine material. Ordinary cold drawn steel, cold drawn round steel, cold drawn flat steel, cold drawn six angle rod and so on, are usually stainless steel, carbon steel, free cutting steel, bearing steel. Cold drawn steel processing has the characteristics of high dimensional accuracy and smooth surface. In actual production, this advantage is only suitable for hot rolled materials compared with other bright materials such as peeling or polishing materials, because the surface cracks appear to be more likely to be at a disadvantage. Cold drawn steel bars are usually shallow, and throwing 20 to 50 can be eliminated. It is a slight crack.

1. composition: stainless steel welded pipe is made of nickel chromium steel, carbon steel and iron, and has nickel, chromium, manganese, copper and other elements. The ASTM A53 pipeline, also known as the ASTM A53 pipeline, is used for mechanical and pressure applications, and also for general purposes of steam, water, gas and air pipelines.

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. The court will investigate the dumping and subsidies of cold rolled carbon steel products imported from these three countries, which has caused damage to the Canadian steel industry. The Canadian International Trade Tribunal operates under the Canadian trade remedy system and reports to Parliament. The court said it would confirm the findings in July 24th.

In April, the total amount of steel imported from steel enterprises in the United States was 3 million 390 thousand tons, with an increase of 12.2% and 11.6% over the same period. However, according to market participants, the trend of import growth is expected to be suppressed in the third quarter of this year.