• Factory of ERW steel line pipe System 1
Factory of ERW steel line pipe

Factory of ERW steel line pipe

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Factory of ERW steel line pipe


StandardAPI SPEC 5L, GB/T 9711,ISO3183 API 5CT GB/T 13793,JIS G 3444, JIS G3445 EN10219-2
Material GradeGR.B X42 X46 X52 X56 X60 X65 X70 X80 PLS1 PLS2 S235JRH S275JOH S275J2H S355JOH S355J2H S355K2H J55 K55 N80 L80-1 C90 C95 T95 P110
Outer Diameter114.3mm-660mm
Thickness3.2mm-22.2mm
Length6m 12m 11.8m or as required
Delivery30-45DAYS
PaymentL/C at sight or T/T deposit


Q:Can steel pipes be used for underground gas pipelines?
Yes, steel pipes can be used for underground gas pipelines. Steel pipes are ideal for underground gas pipelines because they are durable, strong, and can withstand the pressure and corrosive elements found underground. Additionally, steel pipes have a long lifespan, are resistant to extreme temperatures, and are relatively easy to install and maintain.
Q:What is the creep resistance of steel pipes?
The creep resistance of steel pipes refers to their ability to withstand deformation or strain under long-term exposure to high temperatures and constant stress. Steel pipes exhibit good creep resistance due to their high melting point and structural integrity, making them suitable for applications that involve elevated temperatures and prolonged use.
Q:Do steel pipes require maintenance?
Yes, steel pipes do require maintenance. While steel pipes are durable and long-lasting, they can still be subject to wear and tear over time. Regular maintenance is important to ensure their optimal performance and prolong their lifespan. One important aspect of maintenance is inspecting the pipes for any signs of damage or corrosion. Steel pipes can be vulnerable to rust and corrosion, especially in environments with high humidity or exposure to water. Regular inspections allow for early detection of any issues, which can prevent more significant damage and costly repairs in the future. Another aspect of maintenance is cleaning the pipes. Over time, steel pipes can accumulate debris, sediment, or mineral deposits. These build-ups can restrict the flow of fluids or affect the quality of the transported materials. Regular cleaning helps to remove these obstructions and maintain the efficiency of the pipes. Depending on the application, steel pipes may also require periodic lubrication or coating. This helps to reduce friction, prevent corrosion, and enhance the pipes' durability. Lubricants and coatings can be applied during maintenance to ensure the pipes continue to function smoothly and resist corrosion. Overall, regular maintenance of steel pipes is essential to maximize their performance, prevent damage, and prolong their lifespan. By investing time and effort in maintenance, potential issues can be identified and addressed early on, ultimately saving time and money in the long run.
Q:What is the average lifespan of steel pipes in different applications?
The average lifespan of steel pipes in different applications can vary significantly depending on factors such as the type of application, the environment it is exposed to, and the level of maintenance. However, in general, steel pipes can last anywhere from 20 to 100 years or more, making them a durable and reliable choice for various industries and infrastructure projects.
Q:How are steel pipes used in the telecommunications sector?
Steel pipes are commonly used in the telecommunications sector for underground cable management and protection. These pipes provide a durable and secure conduit for telecommunication cables, ensuring their safety from external factors such as weather, vandalism, and accidental damage. Steel pipes also offer excellent strength and resistance to corrosion, making them ideal for long-term use in telecommunications infrastructure.
Q:45 and 316 which steel tubes are of high hardness?
This depends on the heat treatment state, if 45 steel, 314 stainless steel without heat treatment, 316 stainless steel hardness, if the heat treatment, that is 45 steel hardness.
Q:How are steel pipes used in the transportation industry?
Steel pipes are commonly used in the transportation industry for various purposes such as the construction of pipelines, including oil and gas pipelines, water pipelines, and sewage pipelines. They are also used in the manufacturing of automotive parts, such as exhaust systems, and in the construction of infrastructure such as bridges and tunnels. Additionally, steel pipes are used in the transportation of goods through shipping containers and railway tracks.
Q:How are steel pipes inspected for quality?
The quality of steel pipes undergoes a thorough examination process involving diverse techniques and standards. Trained professionals conduct visual inspections to scrutinize the pipes for visible defects such as cracks, dents, or surface irregularities. This examination guarantees that the pipes meet the required specifications and are devoid of any visible flaws. Furthermore, non-destructive testing (NDT) methods are utilized to assess the internal and external quality of the steel pipes. Among the commonly used NDT techniques, ultrasonic testing stands out. This method involves transmitting ultrasonic waves through the pipes to detect any internal defects or inconsistencies in the material. It effectively identifies issues such as variations in wall thickness, inclusions, or weld defects that could compromise the pipe's integrity. Another widely employed NDT technique is magnetic particle inspection. By utilizing magnetic fields and iron particles, this method identifies surface cracks or flaws in the steel pipes. It is particularly effective for detecting defects in ferromagnetic materials and can be performed on both the outer and inner surfaces of the pipes. Moreover, hydrostatic testing is frequently conducted to evaluate the strength and pressure resistance of the pipes. This process involves filling the pipes with water or a suitable fluid and subjecting them to a specified pressure to check for leaks or structural weaknesses. This test ensures that the pipes can withstand the intended operational conditions without failing. In addition to these techniques, various quality control measures are implemented throughout the manufacturing process. These measures include material traceability, dimensional checks, and chemical composition analysis. They play a crucial role in ensuring that the steel pipes meet the required standards and specifications, thereby guaranteeing their quality and reliability. In summary, the inspection of steel pipes for quality involves a comprehensive approach encompassing visual inspection, non-destructive testing methods, and quality control measures. These thorough procedures enable the identification of defects, inconsistencies, or weaknesses, ensuring that the pipes meet the necessary quality standards and are suitable for their intended purpose.
Q:What is the purpose of a steel pipe coating?
The objective of applying a coating to a steel pipe is to safeguard it against corrosion and other environmental elements that may cause deterioration. By coating the pipe with a layer of material, a barrier is created between the steel and its surroundings, thereby averting direct contact and reducing the risk of corrosion. This is particularly crucial for pipes utilized in industries such as oil and gas, water distribution, and construction, where they encounter harsh conditions like moisture, chemicals, and extreme temperatures. Moreover, the coating improves the pipe's durability and longevity, guaranteeing its ability to withstand the demands of its intended use. In certain cases, specific types of pipe coatings can also possess insulation properties, which are valuable in applications where precise temperature control is essential to prevent heat loss or transfer. All in all, the primary purpose of a steel pipe coating is to safeguard the pipe, prolong its lifespan, and ensure optimal performance across various industries and environments.
Q:How do you determine the maximum allowable stress for a steel pipe?
To determine the maximum allowable stress for a steel pipe, several factors need to be considered. These include the material properties of the steel, such as its yield strength, ultimate tensile strength, and elongation. Additionally, the pipe's dimensions, wall thickness, and the intended application or service conditions must be taken into account. By considering these factors, along with relevant design codes and standards, engineers can calculate the maximum stress that the steel pipe can safely withstand without experiencing failure.

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