What is the development of bimetallic composite steel pipe manufacturing technology?

The trial stage will pass, the mechanical composite is basically mature, and the diffusion composite is in the experimental stage;

Problems that need to be addressed:

1) The post-treatment of the composite stainless steel pipe is not perfect: solution treatment and passivation treatment.

2) The problem of the end face of the stainless steel composite steel pipe lined with stainless steel has not been solved;

3) composite strength problems;

4) Pipe fittings;

v) Cutting issues.

6) Whether the "nano layer" in the middle of the stainless steel composite steel pipe lined with stainless steel is a food-grade problem and a problem of effect.

The key: the researcher and the producer are degraded, at present, the manufacturer of the lined stainless steel composite pipe does not have senior technical personnel to check.

Nowadays, the post-treatment of the composite stainless steel pipe is not perfect: solution treatment problem, passivation treatment.

2) The problem of the end face of the stainless steel composite steel pipe lined with stainless steel has not been solved;

3) composite strength problems;

4) Pipe fittings;

v) Cutting issues.

6) Whether the "nano layer" in the middle of the stainless steel composite steel pipe lined with stainless steel is a food-grade problem and a problem of effect.

Bimetallic composite pipe manufacturer Shandong Haiding steel pipe ****. The company adopts advanced technology and advanced equipment to produce various specifications of stainless steel composite pipes, bimetallic composite pipes, stainless steel composite pipe guardrails, lined stainless steel composite pipes, stainless steel carbon steel composite pipes, lined with stainless steel composite pipe fittings, industrial lined stainless steel composite pipes, plastic-coated stainless steel composite pipes, lined stainless steel composite steel pipes.

The bimetallic composite pipe has high carbon content, impact resistance, low thermal expansion rate, pressure resistance, high temperature resistance, mature installation and complete specifications; The bimetallic composite pipes produced by many manufacturers have been widely used in oilfield, chemical industry, electric power and other industrial fields, and their application scope is becoming more and more extensive, and the economic, environmental and social benefits brought by it are more obvious.

The basic principle of bimetallic composite pipe formation

The basic principle of bimetallic composite steel pipe: the outer base pipe is responsible for the role of pressure bearing and rigid macro support of the pipeline, and the inner liner pipe is responsible for corrosion resistance and wear resistance. The outer base pipe can be selected with different diameters and wall thicknesses according to the flow and pressure requirements of the conveying medium.

Hot-dip galvanized steel pipes, longitudinal welded pipes, spiral pipes, seamless steel pipes for low and medium pressure fluid transportation, pressure cooker Huyu furnaces, seamless steel pipes for petroleum cracking, line pipes, etc. The diameter is generally in the range of 20-1020mm, and the wall thickness is generally in the range.

The lining pipe can be selected with different corrosion-resistant alloys according to the chemical composition of the conveying medium. It can be new high-corrosion-resistant alloy materials such as austenitic stainless steel, copper-based alloys, nickel-based alloys, Hastelloy, titanium, titanium alloys, duplex stainless steels, etc. The wall thickness of the liner can be designed according to the requirements of service life and welding process.

Bimetallic clad pipe application range:

Pulverized coal conveying system for thermal power plant, wet and dry ash conveying pipe, gravel coal system.

Other pneumatic conveying systems for powders.

Hydraulic slag conveying system and slurry conveying with large particle size.

All kinds of mining material handling.

Bimetallic composite wear-resistant pipe procurement recommends Jinyiguan Huanggong's wear-resistant pipe production plant.

Answer: 1) Pipe threading machine: 2) Piping talking machine; 3) Compounding machine; 4) Finishing machine; 5) Solid solution equipment; 6) Passivation of Shipai eggplant equipment; Coding and packaging equipment. Search.

Metallurgical Composite of Bimetallic Composite Steel Pipes:

The metallurgical composite of bimetallic composite steel pipe is composed of ** composite, surfacing welding, and double melt technology.

It is characterized by the fact that the interface of the two complexes is metallurgically fused together.

Features: composite interface bandwidth, fusion of two metals;

Solid lamination; There is no boundary between thermal conduction, sound conduction, and electrical conduction; Hot and cold contraction and expansion are consistent.

This process composite bimetallic pipe, the United Kingdom as early as 1967 began to experiment, successfully developed T310 stainless steel outer layer and 125 steel for the inner layer of bimetallic pipe. It meets the high temperature strength and corrosion resistance required by the power and pulp industries.

Boilermakers all over the world are interested in bimetallic tubes as superheated materials for advanced installations (such units operate at high pressures of 80 89 kg mm and at high temperatures of 593 650 °C).

In 1976, the installation of this kind of bimetallic tube in the power generation boiler began to solve the problem of external hearth corrosion of the boiler tube, and its corrosion resistance can be increased by 2 4 times.

The composition and use of metallurgical combination of bimetallic external composite titanium alloy seamless steel pipe: it is composed of carbon seamless steel pipe external compound titanium alloy pipe, through independent research and development of special processing technology, so that the joint of the two is integrated by metallurgical combination, and produces a good metallurgical combination of excessive layer, with good physical, mechanical and chemical properties of carbon seamless steel pipe, and high corrosion resistance of titanium alloy pipe, therefore, this bimetal external composite titanium alloy seamless steel pipe has extremely high corrosion resistance, and has sufficient strength, and high temperature resistance, high pressure resistance, The heat exchange efficiency is extremely high, can be bent, can be flattened, can be flared, can be welded, pollution-free, easy to use, energy saving and consumption reduction, anti-theft (magnetic) in the field and public environment, extremely low cost and other characteristics, is an ideal utility model of the ideal titanium alloy pipe with high corrosion resistance on the outer surface, the technical data have reached the technical requirements of titanium alloy pipe, but it is much lower than the titanium alloy pipe, is a cost-effective new composite material. It is especially suitable for oil refining, petrochemical, boiler, locomotive, electric power, energy, medicine, electroplating, papermaking, marine transportation and other industries, and the products have independent intellectual property rights.

Performance and characteristics of metallurgically combined bimetallic outer composite titanium alloy seamless steel pipe:

1. High-quality composite performance: It is made of carbon seamless steel pipe and titanium alloy pipe, which is combined by special processing technology to make the joint of the two through metallurgical combination, and produce a good metallurgical bonding layer. It can be bent, flattened, flared, welded, and threaded.

2. Extremely high corrosion resistance: due to the external compound titanium alloy tube, it has the same high corrosion resistance as the titanium alloy tube.

3. High strength, high pressure resistance: the base pipe is made of carbon steel seamless pipe for boilers or fluids that meet the requirements of national standards.

4. High temperature resistance: because the inner and outer layers and the binding layer are made of metal materials.

5. Extremely high heat exchange efficiency: because the base pipe is a carbon steel pipe, and most of the composite pipes are composed of carbon steel pipes, its heat exchange efficiency is extremely higher than that of titanium alloy tubes.

6. Anti-theft in the field and public environment: due to the high value of titanium alloy pipe, it is easy to be stolen when used in the field and public environment.

7. Easy connection and installation: it can be connected by flange, welded, and connected by the thread of ordinary steel pipes, which can be arbitrarily intercepted at the construction site, and the installation is very convenient.

8. Hygienic, environmental protection and good safety: due to the stable chemical properties of titanium alloy material, there is no damage to the human body.

Stainless steel composite steel pipe implements the urban construction industry standard CJ T192-2004, which is a composite thin-walled stainless steel pipe on the inner wall of the steel pipe, which greatly improves the corrosion resistance of the steel pipe in the process of water transportation, hot water transportation, gas transportation, natural gas transportation and oil transportation, with smooth surface and low fluid resistance, and retains the high mechanical strength of the steel pipe, which can be welded, grooved and threaded connection, and has the advantages of good sealing, which overcomes the defects of easy corrosion of galvanized steel pipe and easy leakage and aging of plastic pipe with hot melt connectionIt is an ideal product for the upgrading of steel pipes for gas transmission, water transportation and oil transportation. The specific advantages are as follows:

No scaling, no nodulation, corrosion resistance.

Composite thin-walled stainless steel pipe in the steel pipe, the material of the stainless steel pipe is 0Cr18Ni9 (AISI304 for the American standard) specified in the "GB12771-2000 stainless steel welded steel pipe for fluid transportation", because the steel contains 18% chromium, a very thin chromium oxide film is formed on the inner wall of the pipe during use, which prevents the metal from continuing to oxidize, so the stainless steel has strong corrosion resistance, not only can withstand the corrosion of water and air, but also can withstand the corrosion of weak acid and alkali. The thickness of the inner composite stainless steel pipe is millimeters, and the thickness of the galvanized steel pipe is only millimeters, and the thickness difference is doubled, and the corrosion resistance and compactness of stainless steel are stronger than the galvanized steel pipe galvanized layer. Therefore, the inner hole is reduced due to scaling and nodulation caused by the rust of the inner wall.

Second, the use of the occasion.

Please pay attention to the above sentence: it is an ideal upgrade product for gas transmission, water transportation and oil transportation steel pipes. Namely:

It is still mainly used as a tube for fluid transfer. Where are the fluids used? Too much.

Daily water supply, factory pipelines, engineering pipelines, etc. But why use a stainless steel lined clad pipe, because its advantages are corrosion resistance, no scaling, and smoother! Therefore, such as the conveyor pipe of high-end kitchen and bathroom, petrochemical and other factories, and the clothes pole that can resist corrosion, etc., should use this.

As far as I know, bimetallic composite pipes are widely used, mainly used for transportation pipelines, heating furnace pipes, papermaking and other boiler tubes, boiler tubes for high temperature and high pressure, chemical pipes, water pipes, wear-resistant pipes for slurry, composite pipes for atomic power generation, composite steel pipes for structures, offshore oil drilling platform piping, etc.

If you want to know more, you can click on the link below.

Good luck

Excellent features: good wear resistance, giving full play to the wear resistance of high chromium cast iron. High pressure, can be applied to any pressure level.

The inner lining is tightly combined with the outer steel pipe, and a special process is used to form a welding joint between the composite layers to ensure the reliability of operation. It has good resistance to mechanical shock and thermal shock. Easy to install and connect.

It can be connected by flange and flexible joints, and can be cut and welded arbitrarily.

In the electric power, mining, metallurgy and other industries, the transportation and output of materials are all short-distance, high-pressure transportation, the pipeline is subjected to considerable pressure, and undergoes very serious wear, a single material of the pipeline is difficult to meet the requirements of this working condition, especially the elbow, because of the consideration of its use safety, and service life, the focus is on improving the toughness, impact resistance, and wear resistance of the pipeline lining. At the same time, the overall strength of the pipe and elbow should also be considered. A MN seamless steel pipe is widely used at home and abroad, resulting in serious wear and tear of the pipeline, frequent replacement, although a more mature cast stone pipe itself has a high hardness, but due to process reasons, the thickness of the cast stone pipe is larger, stupid, large, stupid, coarse, and is greatly limited in use.

In addition, the cast stone is brittle and easy to break, which brings great difficulties to transportation and installation. Some research units and manufacturers produce composite ceramic steel pipes, but there are many shortcomings, easy to fall off, failure, high temperature and high pressure and the material contains some harmful elements such as sulfur. It is prone to high-temperature oxidation.

It cannot meet the existing operating conditions. Beginning in the late eighties in China, the introduction of American technology in addition, the research of relevant experts and many tests, determined that rare earth wear-resistant steel has occupied the main position, the steel is based on 40 steel to add CR, NI, SI, MO, MN, RE and other elements to form a low alloy steel containing carbon in the about. According to the long-term production system, in many failures, the new experience of more reasonable science is summed up, and a certain amount of rare earth elements is added to improve the alloy quality of steel.

It also plays a role in refining grains; Formation of a protective film on the surface; Add a certain amount of Mo to make the alloy have a certain antioxidation effect at a certain high temperature and increase the service life; Adding a certain amount of boron carbide can control the hardness in the range of HRC45 65, and at the same time solve the contradiction between the hardness and weldability of wear-resistant steel, with high wear resistance, and other wear-resistant materials in practical applications can not be compared with it. Other pneumatic conveying systems for powders and granules; Hydraulic slag conveying system and slurry conveying with large particle size.

Lined with stainless steel clad steel pipe, standard number: CJ T 192-2004

QB T2558-2002 ** Expansion of stainless steel clad steel pipe.

Technical specification for water lined stainless steel clad steel pipe pipes CECS 205:2006

Bimetallic clad steel pipes are also called lined stainless steel clad steel pipes.

It is defined as: carbon steel pipe as the base pipe, through the diameter reduction method, cold expansion method, deflagration method or brazing composite process to composite the stainless steel liner pipe and the base pipe composite process.

The main control parameters are nominal diameter, flattening performance, strength performance, hygienic performance, etc.

According to the different connection methods of the pipeline, it can be divided into: welded connection, threaded connection, flange connection, and groove connection.

Japanese and British clad metal pipe applications.

Serial number Medium tubing material for use.

Outer Inner Outer Layer Inner Layer.

1 Condenser for purification, petroleum gas, seawater, mild steel, brass.

2 Condensers for petrochemical industry, petroleum gas, seawater, corrosion-resistant steel or carbon steel, brass.

3 High-temperature condenser for petroleum refining, petroleum gas, corrosive gas, seawater, corrosion-resistant steel or carbon steel, brass.

4 High Temperature Reactive Gas Cooler Corrosive Reactive Gas Water or Sea Water Corrosion-Resistant Steel Brass.

5 Amine condenser, amine, brine, steel or aluminum, Cu-Ni70-30 alloy.

6 Ammonia condenser, ammonia, sea water or water, mild steel, copper or copper alloy.

7 Ammonia Cooler Ammonia Water or seawater Carbon steel Copper or copper-nickel alloy.

8 benzene condenser benzene vapor seawater mild steel brass.

9 Seawater Cooler, Salt Water, Seawater, Mild Steel, Copper-Nickel Alloy.

10 Surface condenser, steam, cooling water, corrosion-resistant steel, copper or copper alloy.

11 Mercury Purifier Mercury Cooling Water Mild Steel Copper.

12 hydrocarbon condenser hydrocarbons, seawater, mild steel, lead or brass.

13 Cooking Oil Heater Vapor Cooking Oil Copper Corrosion-resistant steel or carbon steel.

14 Cooking Oil Cooler Cooking Oil Water Corrosion Resistant Steel or Carbon Steel Copper.

15 Preparation of CO CO2 adsorber, cooling water, corrosion-resistant steel, copper-nickel alloy.

16 Milk Cooler Milk Calcium Oxide Solution Corrosion Resistant Steel Copper.