Ivy Lee

Common carbon steel pipe manufacturing standards:   In the steel pipe industry, the common carbon steel pipe (cs pipe) manufacturing standards mainly include American standards (ASTM), European standards (EN), Japanese standards (JIS), etc. Among them, ASTM is the most widely used standard in the world, and its pipe types include Seamless Steel Pipe and Welded Steel Pipe. In ASTM standards, different standards are formulated according to the material, size and processing requirements of the pipe, such as ASTM A106, ASTM A53, ASTM A333, ASTM A335, etc., so that steel pipe manufacturers can choose appropriate standards for production according to specific needs.   Carbon steel pipe material and size:   Carbon steel pipe is mainly composed of two elements: carbon and iron. Its main characteristics are high strength, good plasticity and strong processability. Therefore, it has been widely used in petroleum, chemical industry, water treatment, gas ... Continue reading →

Spiral pipe (SSAW) VS. Seamless pipe (SMLS): Which pipe is more durable? Spiral pipes and seamless pipes are common pipe types. They each have their own characteristics. Which pipe is more durable needs to be compared and analyzed from many aspects. 1. From a structural point of view The spiral pipe is made of steel plates that are crimped and welded, and the welds are distributed in a spiral along the axis of the pipe. Seamless pipes are processed through steel pipe perforation, hot rolling or cold drawing, without welds. Therefore, seamless pipes are relatively more complete in structure, do not have the potential weaknesses of welds, and are theoretically more durable. 2. From the perspective of manufacturing process The manufacturing process of seamless pipes is relatively complex and requires multiple processes and heat treatments, so its manufacturing cost is high. The manufacturing process of spiral tubes is relatively simple and the cost is low. However, this does ... Continue reading →

How long is the service life of seamless steel pipes?   Depending on the use environment, maintenance and other factors of seamless steel pipes, their service life is also different. The service life of seamless steel pipes (SMLS) is generally between 10-20 years. Service life of seamless steel pipe: As an important industrial material, seamless steel pipe is widely used in aviation, aerospace, petroleum, chemical industry, electric power and other fields. The service life of seamless steel pipes is mainly affected by the use environment, maintenance and other factors. 1. Usage environment The environment in which seamless steel pipes are used will affect their service life. Under harsh conditions such as high temperature, high pressure, corrosion, vibration, etc., the service life of seamless steel pipes will be shortened accordingly. At the same time, different usage environments will cause different impacts and damage to the surface of seamless steel pipes, affecting ... Continue reading →

For API 5CT oil casing pipe, hardness is a very important indicator. Only oil casing with qualified hardness can ensure the effect when used. On the contrary, if the hardness is unqualified, it is likely to cause problems during use. Accidents cause danger. If you want to know the hardness of API 5CT oil casing, you can actually test the oil casing through experiments. 1. Tensile test Tensile test is to make API 5CT petroleum casing into a sample, pull the sample to fracture on a tensile testing machine, and then measure one or several mechanical properties. Usually only tensile strength, yield strength, and elongation after fracture are measured. and area reduction. Tensile test is the basic mechanical property test method for API 5CT petroleum casing. Almost all metal materials, as long as they have requirements for mechanical properties, require tensile testing, especially those materials whose shapes are not convenient for hardness testing. Testing has become the only method ... Continue reading →

Difference between Carbon steel pipe (CS pipe) and Aluminum alloy pipe: Carbon steel: Carbon steel pipes are mainly made of carbon and have the advantages of high strength, good toughness, and resistance to deformation. It has high overall performance under high pressure environment. The hardness, impact resistance and rigidity are more outstanding and can withstand high pressure and severe environment for a longer period of time. Carbon steel is an iron-carbon alloy with a carbon content of 0.0218%~2.11%. Also called carbon steel. Generally also contains small amounts of silicon, manganese, sulfur, and phosphorus. Generally, the higher the carbon content in carbon steel, the greater the hardness and strength, but the lower the plasticity. Classification of carbon steel: (1) Carbon steel can be divided into three categories according to its use: carbon structural steel, carbon tool steel and free-cutting structural steel. Carbon structural steel is further divided into two ... Continue reading →

What is ERW tube for fire fighting?   ERW tube for fire fighting refers to steel pipe made by resistance welding and used in the fire fighting field. Electric resistance welded pipe (ERW) is produced by the continuous processing of steel coils using resistance welding. The advantages of ERW tubes include high production efficiency, low cost, and affordable price. ERW steel tube is formed by rolling strip and welding, resulting in tighter dimensional tolerances and reduced weight.   Fire tubes refer to pipe materials used for fire fighting, connecting fire fighting equipment and systems, and transporting fire extinguishing water, gas or other media. Since fire protection pipelines are often in a static state, the requirements for the pipelines are strict. They need to withstand pressure, corrosion and high temperatures. Advantages of ERW fire fighting pipes: (1) Strength and durability ERW tubes are made from high-quality steel for exceptional ... Continue reading →

Oil well casing pipe is a barrier that isolates the formation from the wellbore during drilling. In heavy oil thermal recovery wells, casing damage is particularly common. The main damage is manifested in extrusion deformation, distortion, etc. The damage mechanism is: 1. Effect of temperature: a. When the temperature rises, the strength of the casing itself decreases; b. When the temperature rises, the casing expands, causing compressive stress and bending stress in the casing to reduce the strength; c. When the temperature rises, the annulus fluid expands This results in an increase in internal pressure, thereby reducing the strength of the casing. 2. Fatigue damage: The rise in temperature causes the casing to stretch, resulting in tensile and compressive stress. This stress is cyclic and causes fatigue damage to the casing. 3. Slippage damage: The cement sheath and casing will slip due to the increase in temperature, causing the casing to hit the bottom of the well and be ... Continue reading →

Raw material selection and pretreatment process: In the production process of seamless steel pipes (SMLS), the selection and pretreatment of raw materials are crucial links. Only by selecting high-quality raw materials and undergoing reasonable pre-treatment can the quality and performance of the final product be guaranteed. 1. Raw material selection: When making seamless steel pipes, commonly used raw materials include carbon steel, alloy steel, stainless steel, etc. These raw materials have different chemical compositions and mechanical properties, and have different applications in different situations. Therefore, when selecting raw materials, it is necessary to determine the most suitable material based on actual needs and use environment.   2. Pre-processing process: Before raw materials enter the production line, a series of pre-processing procedures are required to ensure smooth subsequent processing. The first step is to inspect the raw materials, ... Continue reading →

Large-diameter thick-walled steel pipes (such as LSAW steel pipes), as important building materials in modern industry, have attracted increasing attention around the world in their manufacturing and application. In the context of Made in China, the development in this field is particularly significant.   Large-diameter thick-walled steel pipes have high strength characteristics and can withstand huge pressure and loads, ensuring that the structure can remain stable and safe in various complex environments. At the same time, the excellent corrosion resistance enables large-diameter thick-walled steel pipes to maintain their integrity and functionality for a long time under conditions of moisture or acid-alkali corrosion, avoiding pipe damage and leakage. Large-diameter thick-walled steel pipes stand out with their significant advantages and have been widely used in many fields. In construction engineering, it serves as a supporting structure to provide a solid foundation for ... Continue reading →

OCTG casing pipe is a steel pipe used to support the well wall of oil and gas wells to ensure the normal operation of the entire oil well during the drilling process and after completion. Each well uses several layers of casing based on different drilling depths and geological conditions. Cement must be used to cement the casing after it is put into the well. It is different from oil pipes and drill pipes and cannot be reused.    During the drilling process, the drill pipe will cause serious impact and wear to the casing pipe. If there is a problem with the casing string in the hole, it will cause serious accidents in the hole or even be scrapped. Therefore, the quality of the drilled casing must meet the following requirements.   1. Material requirements The material of seamless pipe is generally selected based on parameters such as casing depth and quality. When selecting casing materials, the quality of the casing string should also be ... Continue reading →

Seamless steel tube/tubing (SMLS) is a metal pipe used to transport fluids and gases. It is mainly processed through production processes such as hot rolling, cold rolling and cold drawing. It has many pros, but also some cons. What are the pros and cons of seamless steel tube? Pros of seamless steel tube: 1. High strength and rigidity Seamless steel tubes have high strength and rigidity, so they can withstand a lot of pressure and bending forces. This property makes seamless steel tube an important material for structures such as bridges, buildings and vehicles. 2. High temperature resistance Seamless steel tube has good high temperature resistance and can maintain stable performance at high temperatures. Therefore, it can be used in various high-temperature applications, such as steam pipes, heat exchangers and stoves.   3. Corrosion resistance Seamless steel tubes have a smooth surface and no seams, so they have good corrosion resistance. It can be used in the ... Continue reading →

Carbon steel pipe (CS pipe) is a common metal material with a wide range of uses and advantages. The uses and advantages of carbon steel pipes will be introduced from different perspectives below. Common materials for carbon steel pipes include ASTM A106 and ASTM A53.  1) Construction field 1. Structural support Carbon steel pipes are often used for structural support of buildings, such as bridges, buildings, etc. Because carbon steel pipes have high strength and rigidity, they can withstand greater pressure and loads, making buildings more stable and safer. 2. Piping system Carbon steel pipes play an important role in a building's piping system. It can be used to transport water, gas, oil and other fluids. It has good corrosion resistance and sealing performance and can ensure the normal operation of the pipeline system. 3. Decorative materials Carbon steel pipes have a smooth appearance and good texture, and are often used in interior decoration, ... Continue reading →

ERW tube hydrostatic test is a method to determine the strength and leakage prevention ability of ERW tube. This is one of the easiest ways to detect leaks in pressure vessels. This test is one of the most reliable and safest methods for determining the integrity and reliability of newly manufactured ERW tube, or before repairs, post-modification and commissioning phases. The hydraulic pressure test uses water as the medium and pressurizes the laid pressure pipes after they are filled with water. A test to check whether the pipeline has structural damage at a specified pressure value and whether it meets the specified allowable water seepage (or allowable pressure drop) standards. 1. Pre-test Slowly increase the water pressure in the ERW tube to the specified test pressure and stabilize it for 30 minutes. If the pressure drops during this period, water can be added to replenish the pressure. The replenishment pressure must not be higher than the test pressure; check ... Continue reading →

Casing pipe is a steel pipe that supports the walls of oil and gas wells. Each well uses several layers of casing based on different drilling depths and geological conditions. Cement must be used to cement the casing after it is lowered into the well. Unlike oil pipes and drill pipes, it cannot be reused and is a one-time consumable material. Therefore, the consumption of casing accounts for more than 70% of all oil well pipes. According to the usage, casing can be divided into: conduit, surface casing, technical casing and oil layer casing, and their structure in the oil well.   ① Conduit Mainly used for drilling in oceans and deserts to separate seawater and sand to ensure smooth drilling.  The main specifications of this layer of casing are: ∮762mm (30in) × 25.4mm, ∮762mm (30in) × 19.06mm. ② Surface casing It is mainly used for the first drilling to drill through the soft strata on the surface to the bedrock. In order to seal this part of the strata from ... Continue reading →

Carbon steel pipes (CS pipes) for water supply refer to steel pipes for water supply, usually made of carbon steel. Carbon steel is an iron alloy that contains small amounts of carbon and other elements and has better properties than pure iron. Carbon steel pipes for water supply are mainly used to transport tap water, industrial water and agricultural irrigation water.   Carbon steel pipes for water supply have the characteristics of corrosion resistance, high strength, easy installation and maintenance. During the transportation of tap water, carbon steel pipelines can prevent secondary pollution of water quality and can withstand the impact of high-pressure water flow and low temperature. In addition, the surface of carbon steel pipes can be treated to increase their corrosion resistance and service life.   The manufacturing process of carbon steel pipes for water supply mainly includes the following steps: first, the carbon steel material is heated to a certain ... Continue reading →

Oil casing pipe is mainly used to support the well walls of oil, gas and water wells, and is an important guarantee for the normal operation of oil, gas and water wells after drilling and completion. Due to factors such as casing purchase, quality, transportation, storage, and use, casing damage sometimes occurs, resulting in reduced production or even scrapping of oil and gas wells, causing significant economic losses to oil and gas field companies. The following analyzes the key points of quality control in the procurement and production stages of oil casing.   Oil casing pipe procurement:   Based on the exploration and development deployment and drilling plan, users need to develop a demand plan in advance, including model, steel grade, buckle type, wall thickness, length range, weight, quantity and special requirements, such as specifications and grades, thread grease models, thread protector types , raw material manufacturers, etc. The key control points for ... Continue reading →

Compared with other traditional pipes, seamless steel pipes (SMLS) are lighter in material, higher in strength, more durable, can withstand higher internal pressures, are flexible in production and use, and can adapt to complex or harsh geological conditions. There are some differences in performance between seamless steel pipes and traditional pipes, which are mainly reflected in the following aspects: 1. Full-size continuity Seamless steel pipes are manufactured through processes such as hot rolling or cold drawing, so they have full-scale continuity and no welded joints. Traditional pipes (such as welded steel pipes) usually require welded joints, which may have welding weaknesses and risk of breakage. 2. Compression resistance Because seamless steel pipes have no welded joints, the overall structure is stronger and more consistent, and has higher compression resistance. The welded joints of traditional pipes may have weaknesses. For applications that are ... Continue reading →

The question "Shall I use seamless tubes or ERW tubes for my project?" is coming up over and over. Each of the two has different advantages and disadvantages, which should be pondered to take a proper decision:   Seamless tube (SMLS) VS ERW tube:   1. Appearance The outer surface defects of the blanks used in seamless steel tubes cannot be eliminated by the hot rolling process. The defects can only be polished after the finished product is completed; the spiral path left after piercing can only be partially eliminated in the process of reducing the wall.    ERW steel tube uses hot-rolled coils as raw materials. The surface quality of the coils is the surface quality of ERW steel tubes. The surface quality of hot-rolled coils is easy to control and high in quality. Therefore, the surface quality of ERW steel pipes is much better than that of seamless steel tubes.  2. Outer diameter tolerance Seamless steel tube: Hot-rolled forming ... Continue reading →

What are carbon steel seamless pipes and stainless steel seamless pipes?   Seamless steel pipes refer to steel pipes without welds, which are characterized by being less prone to oil or gas leakage. Carbon steel seamless pipes are composed of carbon and iron elements and have the characteristics of high strength and low price. Stainless steel seamless pipes are made of stainless steel materials, which have the characteristics of high temperature resistance to oxidation, corrosion resistance, and high tensile strength. When choosing seamless pipes, you need to choose different materials according to specific use occasions and needs. Carbon Steel Seamless Pipe VS Stainless Steel Seamless Pipe 1. Chemical composition Carbon steel seamless pipes are mainly composed of iron and carbon, with the carbon content ranging from 0.06-1.5%, and also containing small amounts of silicon, manganese, sulfur, phosphorus and other elements.   Stainless steel seamless pipes ... Continue reading →

  Steel pipes are often used in engineering construction. There are many types of steel pipes. Among them, welded steel pipes and galvanized steel pipes are used more frequently. What are the differences between the two? What problems should be paid attention to in construction?   1) The difference between welded steel pipe and galvanized steel pipe 1. Define the difference Welded steel pipe is to bend the steel strip (or steel plate) before welding, and the seam can be seen on the surface, while the galvanized welded pipe is welded. Galvanized on the basis of steel pipe. The purpose is to galvanize general steel pipes (black pipes) in order to improve the corrosion resistance of steel pipes. 2. Classification difference Welded steel pipes are divided into arc welded pipes, high frequency, gas welded pipes, furnace welded pipes, etc. According to the shape of the weld, it can be divided into two types: straight seam and spiral. Galvanized steel pipes are only ... Continue reading →