Seamless steel tubes for high-pressure chemical fertilizer

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Seamless steel tubes for high-pressure chemical fertilizer processmg equipmentStandard：
GB6479 Chinese national standard
Application：
Seamless steel tubes for high-pressure chemical fertilizer processing equipment and pipelines thereof
Model No．of steel tubes：
10、20、16Mn、10MoWVNb、15CrMo、1Cr5Mo、12 Cr2Moetc
.Diamensional tolerances:

Types of steel tubes	Outer diameter		Wall thickness
Cold-rolled tubes	Tube sizes(mm)	Tolerances(mm)	Tube sizes (mm)	Tolerances(mm)
	＞30～50	±0.3	≤30	±10％
	＞50～219	±0.8％	≤30	±10％
Hot-rolled tubes	＞219	±1.0％	＞20	±10％

Mechanical properties：

标准	牌号	抗拉强度（MPa）	屈服强度（MPa）	伸长率（％）	冲击功（J）	低温冲击Akv
GB6479	10	335～490	≥205	≥24	/	－20℃≥18
	20	410～550	≥245	≥24	≥39	－20℃≥18
	16Mn	490～670	≥320	≥21	≥47	－40℃≥21
	10MoWVNb	470～670	≥295	≥19	≥62
	15CrMo	440～640	≥235	≥21	≥47
	1Cr5Mo	390～590	≥195	≥22	≥94
	12 Cr2Mo	450～600	≥280	≥20	≥38

Chemical composition:

Standard codes	Models of steel tubes	Chemical compositions（％）
Standard codes	Models of steel tubes	C	Si	Mn	P	S	Cr	Mo	Ni
GB 6479	10	0.07～0.14	0.17～0.37	0.35～0.65	≤0.030	≤0.030	/	/	/
	20	0.17～0.24	0.17～0.37	0.35～0.65	≤0.030	≤0.030	/	/	/
	16Mn	0.12～0.20	0.20～0.60	1.20～1.60	≤0.030	≤0.030
	10MoWVNb	0.07～0.13	0.50～0.80	0.50～0.80	≤0.030	≤0.030	/	0.60～0.90	/
	15CrMo	0.12～0.18	0.17～0.37	0.40～0.70	≤0.030	≤0.030	0.80～1.10	0.40～0.55	/
	1Cr5Mo	≤0.15	≤0.50	≤0.60	≤0.030	≤0.030	4.00～6.00	0.45～0.60	≤0.60
	12 Cr2Mo	0.80～0.15	≤0.50	0.40～0.70	≤0.030	≤0.030	2.0～2.50	0.90～1.20

NOTE：the residual contents of the elements for the steel 10:Ni≤0.25％、Cr≤0.15％、Cu≤0.20％
the residual contents of the elements for the steel 20:Ni≤0.25％、Cr≤0.25％、Cu≤0.20％、Mo≤0.15％、V≤0.08％
the residual contents of the elements for the steel Ni≤0.30％、Cr≤0.30％、Cu≤0.20％

Q: How do you determine the required support spacing for steel pipes?: Various factors, including the diameter of the pipe, the strength of the material, the operating conditions, and local building codes and regulations, determine the required support spacing for steel pipes. When considering the diameter of the pipe, it is crucial to note that larger pipes generally need more frequent support to prevent excessive deflection and sagging compared to smaller pipes. The strength of the material is also a significant consideration, as pipes with greater strength can span longer distances without requiring additional support. The operating conditions of the pipe, such as the type of fluid being transported and the temperature, also play a role in determining the necessary support spacing. For instance, pipes carrying heavy or corrosive fluids may require more frequent support to prevent excessive stress and potential failure. Local building codes and regulations often provide specific guidelines for the minimum support spacing of steel pipes. These regulations take into account factors such as the diameter of the pipe, the strength of the material, the operating conditions, as well as safety and structural requirements. To accurately determine the required support spacing for steel pipes, it is essential to consult relevant codes, standards, and engineering guidelines. Additionally, working with qualified engineers and professionals experienced in pipe design and installation will ensure that the support spacing meets all necessary requirements, ensuring the safe and efficient operation of the piping system.

Q: Can steel pipes be bent or curved?: Yes, steel pipes can be bent or curved using specialized equipment and techniques such as pipe bending machines or hydraulic bending.

Q: How does the price of steel pipes vary based on market demand?: The price of steel pipes can vary based on market demand. When there is high demand for steel pipes, the price tends to increase as suppliers may have limited stock and are able to charge higher prices. Conversely, when the demand is low, the price of steel pipes can decrease as suppliers may offer discounts or reduce prices to encourage sales. Therefore, market demand plays a significant role in influencing the price fluctuations of steel pipes.

Q: What is the role of steel pipes in the transportation of liquefied natural gas (LNG)?: Due to their unique properties and characteristics, steel pipes are essential in the transportation of liquefied natural gas (LNG). LNG is a form of natural gas that is cooled to a liquid state for easier transportation and storage. Specific infrastructure is required for the transportation of LNG, and steel pipes are a crucial part of this infrastructure. To begin with, steel pipes are used in the construction of LNG terminals and liquefaction plants. These facilities are responsible for converting natural gas into its liquid form and storing it prior to transportation. The extremely cold temperatures needed to maintain LNG in its liquid state necessitate the use of materials that can withstand these conditions, and steel pipes are well-suited for this purpose. Steel pipes possess excellent strength and durability, enabling them to handle the low temperatures and high pressures involved in the liquefaction and storage processes. Additionally, steel pipes are employed in the transportation of LNG from the liquefaction plants to the storage tanks or shipping vessels. LNG is typically transported over long distances, either through pipelines or specialized LNG carriers. Steel pipes are utilized in the construction of underground or above-ground pipelines, providing a reliable and safe means of transporting the LNG. The pipes must be capable of maintaining the low temperatures of the LNG while enduring the pressures and stresses associated with the transportation process. Steel pipes offer the necessary strength, corrosion resistance, and thermal properties to ensure the safe and efficient transportation of LNG. Finally, steel pipes are also utilized in the construction of storage tanks for LNG. These tanks are designed to keep the LNG in its liquid state until it is ready for use or further transportation. The tanks are often constructed using a combination of steel plates and steel pipes. Steel pipes are employed to connect the various components of the tank, such as the inner and outer shells, reinforcing the structural integrity of the tank and guaranteeing its ability to withstand the extreme conditions to which it is exposed. In conclusion, steel pipes are vital in the transportation of liquefied natural gas (LNG) due to their strength, durability, and ability to endure low temperatures and high pressures. From the construction of LNG terminals and liquefaction plants to transportation through pipelines or specialized vessels, steel pipes are a crucial component of the infrastructure required for the safe and efficient transportation and storage of LNG.

Q: Seamless steel tube 89X4 meters, how heavy?: According to the theory, each meter is 8.3844 kilograms. If you want to be precise, you'll lose your own weight.

Q: Can steel pipes be used for water supply lines?: Yes, steel pipes can be used for water supply lines. Steel pipes are commonly used in industrial and commercial applications for transporting water and other fluids. They offer a high level of durability and strength, making them suitable for high-pressure systems. Additionally, steel pipes have excellent resistance to corrosion, which is important for maintaining the quality and safety of the water supply. However, it is essential to ensure that the steel pipes used for water supply lines are properly coated or lined to prevent any potential contamination of the water.

Q: What are the different methods of welding steel pipes?: There are several different methods of welding steel pipes, including shielded metal arc welding (SMAW), gas tungsten arc welding (GTAW), gas metal arc welding (GMAW), flux-cored arc welding (FCAW), and submerged arc welding (SAW). Each method has its own advantages and is suitable for different applications and pipe sizes.

Q: Are steel pipes recyclable?: Yes, steel pipes are recyclable.

Q: What is the difference between steel pipe and aluminum pipe?: The main difference between steel pipe and aluminum pipe lies in their composition and properties. Steel pipe is made primarily of iron and carbon, with other elements added to enhance its strength and durability. It is known for its high tensile strength, resistance to corrosion, and ability to withstand high temperatures and pressure. On the other hand, aluminum pipe is made from aluminum, which is a lightweight metal known for its excellent corrosion resistance, thermal conductivity, and malleability. While steel pipe is generally stronger and more rigid, aluminum pipe is lighter and more easily manipulated. Additionally, steel pipe is often used in applications where strength and durability are critical, such as in construction and plumbing, while aluminum pipe is commonly used in industries that require lightweight materials, such as aerospace and automotive.

Q: How are steel pipes made?: Steel pipes are made through a process called pipe manufacturing, which involves multiple steps. Firstly, raw steel is melted in a furnace and then subjected to continuous casting to form a solid billet. This billet is then heated and pierced to create a hollow tube called a shell. Next, the shell is rolled and stretched to the desired diameter and thickness using a series of rollers. The pipe is then subjected to a process called welding, where two edges of the shell are fused together to create a seamless or welded pipe. Finally, the pipe undergoes various finishing processes such as cutting, straightening, and inspection before being ready for use.

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