Seamless Steel Pipe for Petroleum Cracking Multipurpose Hot

Seamless Steel Pipe for Petroleum Cracking Multipurpose Hot System 1

Seamless Steel Pipe for Petroleum Cracking Multipurpose Hot

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Loading Port:: China main port

Payment Terms:: TT or LC

Min Order Qty:: 10 m.t.

Supply Capability:: 4500 m.t./month

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Product Description:

Standard：
GB9948 Chinese national standard
Application：
Served as for furnace tubes，heat exchange tubes and pipelines in petroleum and refinery plants
Model No．of major steel tubes：
1n 9n 1Er!rMn 1rhMn 1f：hM0 etC

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：

Standard codes	Models of steel tubes	抗拉强度（MPa）	屈服强度（MPa）	伸长率（％）	冲击功（J）	布氏硬度（HB）	交货状态
GB9948	10	330～490	≥205	≥24	/	/	正火
	20	410～550	≥245	≥21	≥39	/	正火
	15CrMo	440～640	≥235	≥21	≥47	≤170	正火加回火
	1Cr2Mo	≥390	≥175	≥22	≥92	≤179	正火加回火
	1Cr5Mo	≥390	≥195	≥22	≥92	≤187	退火

Chemical composition:

Standard codes	Models of steel tubes	Chemical compositions（％）
Standard codes	Models of steel tubes	C	Si	Mn	P	S	Cr	Mo	Ni
GB9948	10	0.07～0.14	0.17～0.37	0.35～0.65	≤0.035	≤0.035	≤0.15	/	≤0.25
	20	0.17～0.24	0.17～0.37	0.35～0.65	≤0.035	≤0.035	≤0.25	/	≤0.25
	15CrMo	0.12～0.18	0.17～0.37	0.40～0.70	≤0.035	≤0.035	0.80～1.10	0.40～0.55	≤0.30
	1Cr2Mo	≤0.15	0.50～1.00	0.30～0.60	≤0.035	≤0.030	2.15～2.85	0.45～0.65	/
	1Cr5Mo	≤0.15	≤0.50	≤0.60	≤0.035	≤0.030	4.00～6.00	0.45～0.60	≤0.60

FAQ of Seamless Pipe :

①How is the quality of your products?
Our products are manufactured strictly according to national and internaional standard, and we take a test on every pipe before delivered out. If you want see our quality certifications and all kinds of testing report, please just ask us for it.
Guaranteed: If products’ quality don’t accord to discription as we give or the promise before you place order, we promise 100% refund.

②How about price?
Yes, we are factory and be able to give you lowest price below market one, and we have a policy that “ for saving time and absolutely honest business attitude, we quote as lowest as possible for any customer, and discount can be given according to quantity”,if you like bargain and factory price is not low enough as you think, just don’t waste your time.Please trust the quotation we would give you, it is professional one.

③Why should you chose us?
Chose happens because of quality, then price, We can give you both.Additionally, we can also offer professional products inquiry, products knowledge train(for agents), smooth goods delivery, exellent customer solution proposals.Our service formula: good quality+good price+good service=customer’s trust
SGS test is available, customer inspection before shipping is welcome, third party inspection is no problem.

Any question, pls feel free to contact us !

Seamless Pipe Images：

Seamless Steel Pipe for Petroleum Cracking Multipurpose Hot

Q:What is the role of steel pipes in the construction of stadiums?: Steel pipes play a crucial role in the construction of stadiums as they are used for various purposes such as structural support, drainage systems, and the distribution of utilities like water and electricity. These pipes provide a sturdy and durable framework, allowing for the construction of large and complex structures. They also facilitate efficient and reliable management of essential services, ensuring the smooth operation of stadiums during events.

Q:Can steel pipes be used for underground culverts?: Indeed, underground culverts can utilize steel pipes. Renowned for their robustness, longevity, and ability to withstand diverse environmental influences, steel pipes are ideal for subterranean applications. They exhibit exceptional resilience to substantial burdens, intense hydrostatic pressure, and the erosive impact of soil and water. Moreover, steel pipes offer a range of dimensions and thicknesses, enabling customization to meet precise project prerequisites. Nevertheless, prudent consideration must be given to variables such as soil attributes, water table elevations, and the likelihood of corrosion during the selection of the most fitting steel variant and protective coatings for the pipes.

Q:How are steel pipes insulated for thermal efficiency?: Steel pipes are insulated for thermal efficiency by adding a layer of insulation material around them. This insulation helps to reduce heat transfer through the pipes, preventing energy loss and maintaining the desired temperature.

Q:Can steel pipes be used for natural gas processing plants?: Yes, steel pipes can be used for natural gas processing plants. Steel pipes are commonly used in the oil and gas industry due to their strength, durability, and resistance to high pressure and extreme temperatures. They provide a reliable and efficient means of transporting natural gas within processing plants.

Q:Can steel pipes be used for paper mills?: Yes, steel pipes can be used for paper mills. Steel pipes are commonly used in paper mills for various purposes such as transporting fluids, chemicals, and steam within the facility. They are known for their durability, strength, and resistance to corrosion, making them suitable for the harsh conditions and high-pressure requirements of paper mill operations.

Q:What is the role of steel pipes in the food processing industry?: Steel pipes play a crucial role in the food processing industry by providing a reliable and hygienic means of transporting various fluids, such as water, gases, and food products. These pipes are resistant to corrosion and can withstand high temperatures and pressures, ensuring the safety and efficiency of food processing operations. They are used for conveying ingredients, cleaning agents, steam, and other necessary fluids, maintaining the integrity and quality of food products throughout the manufacturing process.

Q:What is the impact of temperature on steel pipes?: The impact of temperature on steel pipes is significant and can have both positive and negative effects. At high temperatures, steel pipes can experience thermal expansion, causing them to expand and potentially leading to distortion or buckling. This expansion can also affect the joints and connections, potentially causing leaks or failures. Therefore, it is crucial to consider the coefficient of thermal expansion when designing and installing steel pipes in high-temperature environments. On the other hand, steel pipes typically have excellent thermal conductivity, allowing them to withstand high temperatures without significant degradation. This makes them suitable for applications where heat transfer is a primary concern, such as in industrial processes or heating systems. Extreme cold temperatures can have detrimental effects on steel pipes as well. In freezing conditions, water or other fluids inside the pipes can expand and lead to cracks or bursts. This can cause leaks, loss of fluid, and potential damage to surrounding structures. Therefore, appropriate insulation and preventive measures need to be taken to ensure the integrity of steel pipes in cold environments. Additionally, temperature variations can also affect the mechanical properties of steel, such as its tensile strength and toughness. For instance, exposure to elevated temperatures over an extended period can lead to a phenomenon known as thermal degradation, where the steel's strength decreases, making it more prone to deformation or failure. In conclusion, the impact of temperature on steel pipes is significant and can influence their structural integrity, thermal performance, and mechanical properties. Proper design, insulation, and maintenance are essential to ensure the safe and efficient operation of steel pipes in various temperature conditions.

Q:What is the density of steel pipes?: The density of steel pipes fluctuates based on the particular grade and composition of the steel employed. On the whole, steel pipes generally possess a density of approximately 7.8 grams per cubic centimeter (g/cm³) or 7800 kilograms per cubic meter (kg/m³). It should be emphasized that this figure may undergo slight variations contingent upon factors such as the manufacturing technique and the specific alloy integrated into the steel.

Q:What are the different wall thicknesses available for steel pipes?: Steel pipes are available in various wall thicknesses to meet specific requirements and applications. Different schedules indicate the wall thickness. The most commonly used wall thicknesses for steel pipes are Schedule 40, Schedule 80, and Schedule 160. Schedule 40 pipes have a medium wall thickness and are commonly used for general-purpose applications, like conveying fluids and gases. They are suitable for low-pressure systems and widely used in plumbing, HVAC, and irrigation systems. Schedule 80 pipes have a thicker wall compared to Schedule 40 and are designed for high-pressure applications. They are commonly used in industrial settings, oil and gas pipelines, and high-pressure fluid transport systems. The increased wall thickness ensures higher strength and durability to withstand pressure. Schedule 160 pipes have the thickest wall among the available options. They are designed for extremely high-pressure applications, such as refineries, chemical plants, and power generation facilities. These pipes offer exceptional strength and can handle intense pressure and stress in industrial environments. In addition to standard schedules, there are other wall thicknesses available for specific purposes. For instance, extra-strong (XS) pipes have a thicker wall than Schedule 80 pipes and are used for applications requiring even higher pressure resistance. It is crucial to consult professionals or refer to industry standards to determine the appropriate wall thickness for a specific application. Factors like fluid or gas pressure, temperature, and environmental conditions should be considered when selecting the suitable steel pipe with the desired wall thickness.

Q:How are steel pipes measured and categorized?: Steel pipes are typically measured and categorized based on their outer diameter, wall thickness, and length. The outer diameter refers to the measurement of the pipe's cross-sectional width, while the wall thickness refers to the thickness of the pipe's walls. These measurements are usually expressed in millimeters or inches. Categorization of steel pipes is done based on their purpose and specifications. The most common categorization is based on the pipe's pressure rating, which determines its ability to withstand different levels of internal or external pressure. Pipes are classified into various pressure classes, such as Schedule 40, Schedule 80, and Schedule 160, among others. The higher the pressure class, the thicker and stronger the pipe. Another way to categorize steel pipes is based on their manufacturing process and material composition. For example, seamless steel pipes are produced through a process that involves piercing a solid bar of steel to form a hollow tube, while welded steel pipes are made by rolling and welding a flat steel sheet or strip into a cylindrical shape. Additionally, steel pipes can be categorized based on their material composition, such as carbon steel pipes, stainless steel pipes, or alloy steel pipes. Steel pipes are also categorized based on their end connections or fittings. Common types of pipe ends include threaded ends, which are suitable for screwing fittings onto the pipe, and plain ends, which are typically used for welding or flanging connections. Overall, the measurement and categorization of steel pipes play a crucial role in ensuring their proper selection and usage in various industries, such as construction, oil and gas, plumbing, and manufacturing.

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