Who knows what s a good point for seamless steel pipe networks or something

Founded in 1993, steel pipe manufacturing **** is located in Yanshan Chengnan Industrial Zone, Hebei Province, covering an area of 10,000 square meters, with a construction area of 210,000 square meters and total assets of 1.1 billion yuan, with 4 advanced ERW hot-rolled steel pipe production lines, 12 spiral seam double-sided submerged arc welded pipe production lines, 2 oil casing production lines, and 1 large-scale three-layer structure polyolefin (PE, PP) coating production line. It is equipped with high-standard physical and chemical laboratories and advanced testing equipment. The company has more than 1,200 employees, including 160 engineers and technicians.

The business tenet is: "integrity and win-win cooperation".

There are many steel pipe capitals in the world of steel pipes, steel pipe alliances, and steel pipe capitals.

Steel withered silver answer; What is the difference between a pipe and a seamless pipe 1. The processing technology is different.

1.The seam steel pipe is made of high-quality carbon steel or alloy steel. The processing technology of seamless steel pipe includes cold drawing method and hot rolling method, while seamed pipe is generally welded.

2.Different uses. Seamless steel pipes are mainly used as pipes or structural components to transport fluids, mainly in the machinery industry.

Seamed steel pipes are mainly used for fluid and gas transportation in the construction industry, such as low-pressure fluids such as water, gas, and compressed air. Pressure pipes are generally made of seamless steel pipes.

<>3.Under normal circumstances, the pressure that the seamed steel pipe can withstand is less than 20 kg, which is a safe use range. It is usually used for low-pressure fluids such as water, gas, and compressed air.

Seamless pipes can withstand ultra-high pressure, of course, their wall thickness will increase, which needs to be designed according to the required pressure, and is often used in high-pressure and high-pressure equipment such as high-pressure oil pipes and boiler tubes. There are also seamless pipes for structural use, depending on the design requirements. At present, there are several seamed steel pipes for seamless treatment, annealing of the weld, and the pressure range is basically the same as that of seamless steel pipes.

Consider using. There are also some seamed steel pipes on the market that are made into seamless steel pipes by drawing or rolling with core head after overall heating, and the specifications are smaller, and such steel pipes only belong to seamless steel pipes in appearance, and their essence is not very ideal.

4.Differences in use. Seamless steel pipes are made of cold drawn and hot drawn, and are generally used for medium pressures equal to or greater than. The seamed steel pipe is made of high-frequency welding with butt after the steel plate is formed

First, the chemical composition is different:

There are slight differences between the chemical composition of seamless steel pipes GB T 8163-2008 and GB 9948-2013 standards, and the main difference in chemical composition is in P and S content.

Second, the use is different:

GB8163 steel pipes are tested for hydraulic testing one by one or ultrasonic, eddy current and magnetic flux leakage flaw detection. Therefore, in the standard selection of pressure pipeline steel pipes, it is not appropriate to use GB8162 standard.

Generally, 9948 steel pipes are mainly used to manufacture water wall pipes, boiling water pipes, superheated steam pipes, superheated steam pipes for locomotive boilers, large and small smoke pipes and arch brick pipes.

9948 seamless steel pipes are mainly used to manufacture superheater tubes, reheater tubes, air guide pipes, main steam pipes, etc. for high-pressure and ultra-high-pressure boilers.

Third, the standard production is different:

20 seamless steel pipes produced according to GB 9948-2013 standard can replace 20 seamless steel pipes produced according to GB T 8163-2008 standard. 9948 and 8163 are national technical standards. 8163 special steel pipe for fluid.

9948 special steel pipe for petroleum cracking.

Steel pipes produced according to GB T8163 are only used for general fluids. Because the GB3087 standard is higher than the GB T8163 standard in terms of allowable deviation of wall thickness, bending test, low magnification inspection and surface quality.

In addition, the GB3087 standard also stipulates the high temperature strength requirements, so the seamless steel pipe of GB T8163 cannot be used instead of GB3087.

Under the condition that the maximum test pressure is not more than 10MPa, the steel pipe produced according to GB3087 standard can replace the steel pipe produced according to GB T8163 standard. When the wall thickness of the steel pipe is 15mm, pay attention to the wall thickness of the steel pipe when substituting.

There are many seamless steel pipe materials, but they are often used: 10, 16MN, Q345B, 27SIMN, 20CR, 40CR, 20CRMO, 35CRMO, 42CRMO, 12CR1MOV, 15CRMO, P91, P22, 10CRMO910, GCR15, which is a very common material.

Seamless steel pipe.

The materials of standing resources are: 10, 16mn, 27simn, 40cr, 12cr1mov, 10crmo crmo, 35crmo, 45mn2, etc.

1. According to different production methods, it is divided into hot-rolled pipes, cold-rolled pipes, cold-drawn pipes, extruded pipes, pipe jacking, etc., all of which have their own process regulations.

2. According to the material, there are ordinary and high-quality carbon structural steel (Q215-A, Q275-A and 10 No. 50 chasley steel), low-alloy steel (09mnv, 16mn, etc.), alloy steel, stainless acid-resistant steel, etc.

3. According to the use, it is divided into two categories: general purpose (for water transportation, gas pipelines and structural parts, mechanical parts) and special (for boilers, geological exploration, bearings, acid resistance, etc.).

The barrel is made of seamless steel. The material is mostly chromium-molybdenum high-alloy steel (mostly military guns) stainless steel (containing 10% chromium, mostly used to make competition-grade barrels).

According to the tactical requirements of different types, the raw materials of the corresponding materials are generally alloy steel, manganese, tungsten, chromium, molybdenum, nickel and other elements according to the characteristics of the elements belong to the list of metal elements that need to be synthesized....(For example, the effectiveness of chromium is to reduce the wear of the bullet on the barrel, improve the life of the barrel, etc....)）

It is also possible to use high-carbon steel, and the early 53 is high-carbon steel.

Seamless steel pipe refers to a steel pipe that is perforated by a whole round steel and has no welds on the surface. Seamless steel pipes are mainly used in petroleum geological drilling pipes, cracking pipes, boiler pipes, bearing pipes for petrochemical industry, and high-precision structural steel pipes for automobiles, tractors and aviation. Seamless steel pipes have a hollow cross-section, and are widely used as pipelines for transporting fluids, such as pipelines for transporting oil, natural gas, gas, water and some solid materials.

Compared with solid steel such as round bar, steel pipe has the same bending and torsional strength, and is lighter in weight, which is an economical cross-section steel.

According to the production method, seamless steel pipes can be divided into hot-rolled seamless steel pipes, cold-rolled seamless steel pipes, cold-drawn seamless steel pipes, extruded seamless steel pipes, pipe jacking, etc.

According to the cross-sectional shape, seamless steel pipes are divided into two types: round and special-shaped, and special-shaped pipes have a variety of complex shapes such as square, oval, triangular, hexagonal, melon-seed-shaped, star-shaped, and winged tubes. The maximum diameter is 900 mm, and the minimum diameter is 4 mm.

Depending on the application, there are thick-walled seamless steel pipes and thin-walled seamless steel pipes. Seamless steel pipes are mainly used in petroleum geological drilling pipes, cracking pipes, boiler pipes, bearing pipes for petrochemical industry, and high-precision structural steel pipes for automobiles, tractors and aviation.

Seamless steel pipe is a steel pipe without welded cavity head, which is manufactured through a continuous production process. Compared with welded steel pipes, seamless steel pipes have the following characteristics:

1.Manufacturing process: Seamless steel pipe is processed from a piece of integral round steel by solid perforation or hot rolling, cold rolling, etc., without welded joints.

2.Internal and external surface quality: The inner and outer surfaces of seamless steel pipes are smooth and have no welding marks. This gives seamless steel pipes an advantage in applications that require high surface quality, such as liquid transfer.

3.Strength performance: Due to the absence of welded joint parts, the strength and toughness of seamless steel pipes are generally better than those of welded steel pipes. Seamless steel pipes have higher reliability and safety when subjected to higher internal pressure or external loads.

4.Dimensional accuracy: The dimensional accuracy of seamless steel pipes is high, and products that meet the specified size can be produced according to customer requirements.

Seamless steel pipes are widely used in petroleum, chemical, natural gas, shipbuilding, electric power, construction and other industries, and have been widely used in occasions that require high strength, high quality and strict dimensional accuracy.