Seamless Steel Pipe for Petroleum Cracking for Frozen Food

Seamless Steel Pipe for Petroleum Cracking for Frozen Food

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Loading Port:: China main port

Payment Terms:: TT or LC

Min Order Qty:: 5 m.t.

Supply Capability:: 4500 m.t./month

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Product Description:

Seamless steel pipe with hollow section, used as a large number of pipe conveying fluid, such as oil, natural gas, coal gas, water and some solid materials such as pipelines. Compared with steel and round steel solid steel, the torsional strength of bending is same, the weight is light, is a kind of economic section steel, widely used in the manufacture of structural parts and mechanical parts, such as the oil pipe, automobile transmission shaft, the bicycle frame and steel construction with scaffold with steel pipe manufacturing annular parts, can improve the the material utilization rate, simplify the manufacturing process, material saving and working hours, has been widely used in steel pipe manufacturing

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 for Frozen Food

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. Firstly, the type of steel used in the pipe is crucial as different types of steel have different mechanical properties and strengths. Secondly, the dimensions and thickness of the pipe play a significant role in determining its maximum allowable stress. Thicker pipes generally have higher allowable stresses compared to thinner ones. Additionally, it is important to consider the operating conditions under which the pipe will be subjected. This includes factors such as the temperature, pressure, and the type of fluid flowing through the pipe. These conditions can greatly affect the maximum allowable stress as high temperatures or corrosive fluids may weaken the steel and reduce its strength. To determine the maximum allowable stress, engineers typically refer to industry standards and codes such as the American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel Code and the American Petroleum Institute (API) standards. These standards provide guidelines and formulas for calculating the maximum allowable stress based on the material properties, dimensions, and operating conditions of the pipe. It is important to note that determining the maximum allowable stress is a critical step in ensuring the structural integrity and safety of the steel pipe. It requires a thorough understanding of the materials, design considerations, and industry standards. Therefore, it is recommended to consult with experienced engineers or professionals who specialize in piping design and analysis to accurately determine the maximum allowable stress for a steel pipe.

Q: Are steel pipes suitable for underground drainage systems?: Yes, steel pipes are suitable for underground drainage systems. They are commonly used in such systems due to their durability, strength, and resistance to corrosion. Steel pipes can effectively handle the pressure and flow of water and other fluids, making them a reliable choice for underground drainage.

Q: How are steel pipes used in power plants?: Power plants rely heavily on the extensive use of steel pipes for a variety of purposes. When it comes to transporting fluids and gases, steel pipes are the go-to choice. They effectively carry water, steam, and fuel (like oil or gas) throughout the power plant. The reason steel pipes are so widely used for this purpose is because of their exceptional strength and durability. They can withstand the high pressures and temperatures found in power plants without faltering. Another crucial role steel pipes play in power plants is in the boilers. They are an integral part of the boiler system, responsible for the transportation of hot gases and steam. These pipes are specifically designed to endure extreme heat and pressure, ensuring the safe and efficient operation of the boiler. Moreover, steel pipes are utilized in the cooling systems of power plants. They facilitate the circulation of water to cool down essential equipment such as turbines and condensers. These pipes are built to withstand corrosion caused by the cooling water, all while maintaining the required flow rate and pressure. Additionally, steel pipes find their place in the construction of power plant structures. They are extensively used for fabricating support structures like frames, platforms, and walkways. Steel pipes possess excellent structural integrity and can bear heavy loads, making them the perfect choice for these applications. In conclusion, steel pipes fulfill a crucial role in power plants by efficiently transporting fluids and gases, serving as an essential component of the boiler system, facilitating cooling processes, and providing structural support. Their strength, durability, and resistance to extreme conditions make them indispensable in the operation of power plants.

Q: What is a valve and how is it used in steel pipes?: A valve is a device used to control the flow of fluid or gas within a system. In steel pipes, valves are used to regulate and control the flow of liquids or gases by opening, closing, or partially obstructing the passage within the pipe. They are essential for redirecting or stopping the flow, ensuring the safe and efficient operation of the steel pipe system.

Q: What is the purpose of galvanizing steel pipes?: The purpose of galvanizing steel pipes is to protect them from corrosion and increase their lifespan.

Q: What are the factors affecting the durability of steel pipes?: There are several factors that can affect the durability of steel pipes, including the quality of the steel used, the manufacturing process, the environment in which the pipes are installed, and the maintenance and care given to the pipes.

Q: How are steel pipes classified according to their use?: Steel pipes can be classified according to their use into various categories such as structural pipes, plumbing pipes, oil and gas pipes, water supply pipes, and industrial pipes.

Q: How are steel pipes inspected for quality?: Steel pipes are inspected for quality through a rigorous process that involves various techniques and standards. One common method is visual inspection, where trained professionals examine the pipes for any visible defects such as cracks, dents, or surface irregularities. This visual inspection ensures that the pipes meet the required specifications and are free from any visible flaws. Additionally, non-destructive testing (NDT) methods are employed to evaluate the internal and external quality of the steel pipes. One widely used NDT technique is ultrasonic testing, which involves sending ultrasonic waves through the pipes to detect any internal defects or inconsistencies in the material. This method can identify issues like wall thickness variations, inclusions, or weld defects that may compromise the pipe's integrity. Another popular NDT technique is magnetic particle inspection, which uses magnetic fields and iron particles to identify surface cracks or flaws in the steel pipes. This method is particularly effective for detecting defects in ferromagnetic materials and can be performed on both the outside and inside surfaces of the pipes. Furthermore, hydrostatic testing is often conducted to evaluate the pipes' strength and resistance to pressure. In this process, the pipes are filled with water or another suitable fluid and subjected to a specified pressure to check for leaks or structural weaknesses. This test helps ensure that the pipes are capable of withstanding the intended operational conditions without failure. In addition to these techniques, various quality control measures are implemented throughout the manufacturing process, including material traceability, dimensional checks, and chemical composition analysis. These measures help guarantee that the steel pipes meet the required standards and specifications, ensuring their quality and reliability. Overall, the inspection of steel pipes for quality involves a combination of visual inspection, non-destructive testing methods, and quality control measures. These comprehensive procedures help identify any defects, inconsistencies, or weaknesses, ensuring that the pipes meet the necessary quality standards and are fit for their intended purpose.

Q: How are steel pipes used in the manufacturing of shipbuilding?: Steel pipes are used in the manufacturing of shipbuilding primarily for their strength, durability, and corrosion resistance. They are commonly used in various applications such as the construction of hulls, decks, bulkheads, and piping systems within the ship. The pipes are used for carrying fluids, gases, and other materials throughout the vessel, ensuring efficient operation and safety. Additionally, steel pipes are crucial for the installation of essential systems like water supply, fire-fighting, heating, and ventilation, contributing to the overall functionality and structural integrity of the ship.

Q: How do you prevent steel pipes from freezing?: To avoid freezing of steel pipes, there are several actions that can be taken: 1. Insulate the pipes: Utilize foam insulation sleeves or wrap the pipes with insulation tape. This will help maintain the temperature of the pipes and prevent freezing. 2. Seal any gaps or cracks: Examine the area surrounding the pipes and seal any gaps or cracks using caulk or expanding foam. This will prevent cold air from entering and causing freezing. 3. Install heat cables: Wrap heat cables around the steel pipes to provide a constant source of warmth. These cables can be controlled by a thermostat, ensuring that the pipes remain above freezing temperature. 4. Maintain above-freezing temperature: In regions with severe cold weather, it is recommended to keep the indoor temperature above freezing, even if the property is unoccupied. This will help maintain a suitable temperature for the pipes and prevent freezing. 5. Open cabinets and faucets: During extremely cold weather, open cabinet doors in kitchens and bathrooms to allow warm air to circulate around the pipes. Additionally, allowing faucets to drip slightly can keep water flowing and prevent freezing. 6. Drain the pipes: If the property will be vacant during freezing weather, it is advisable to completely drain the pipes. This can be achieved by shutting off the main water supply and opening all faucets until no water remains. This minimizes the risk of freezing and potential damage. Remember, taking preventive measures is vital in safeguarding steel pipes against freezing. By implementing these actions, you can significantly reduce the chances of frozen pipes and costly repairs.

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