Seamless steel tube for transmission of fluids

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Standard：
GB／T8163 Chinese national standard
Application：
General seamless steel tubes for conveying fluids
Models of major steel tubes：
10．20，Q345，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	Tensite strength（MPa）	Yield strength（MPa）	Elongation（％）
GB/T8163	10	335～475	≥205	≥24
	20	410～550	≥245	≥20
	Q345	490～665	≥325	≥21

Chemical composition:

Standard codes	Models of steel tubes	Chemical compositions（％）
Standard codes	Models of steel tubes	C	Si	Mn	P	S	Cr	Ni	Cu
GB/T8163	10	0.07～0.14	0.17～0.37	0.35～0.65	≤0.035	≤0.035	≤0.15	≤0.25	≤0.25
	20	0.17～0.24	0.17～0.37	0.35～0.65	≤0.035	≤0.035	≤0.25	≤0.25	≤0.25
	Q345	0.12～0.20	0.20～0.55	1.20～1.60	≤0.045	≤0.045	/	/	/

Q: What is the maximum length of steel pipes available?: The maximum length of steel pipes available can vary depending on the specific manufacturer and supplier. However, in general, steel pipes can be found in lengths ranging from 18 feet to 40 feet or even longer.

Q: How are steel pipes used in the manufacturing of chemical processing equipment?: Steel pipes are commonly used in the manufacturing of chemical processing equipment due to their durability, resistance to corrosion, and ability to handle high-pressure and high-temperature conditions. These pipes are used to transport various chemicals, gases, and liquids within the equipment, ensuring safe and efficient operations. They are also utilized for the distribution of heat transfer fluids, such as steam or hot water, to maintain optimal temperatures during chemical reactions.

Q: What is the purpose of steel pipes?: The purpose of steel pipes is to provide a reliable and efficient means of transporting fluids and gases, such as water, oil, and natural gas, over long distances. They are also used in various industries for structural support, as well as in plumbing and construction projects.

Q: What are the different types of coatings applied to steel pipes?: There are several types of coatings that can be applied to steel pipes. Some common ones include fusion-bonded epoxy (FBE) coating, polyethylene (PE) coating, polypropylene (PP) coating, and zinc coating. These coatings serve various purposes such as corrosion protection, insulation, and enhancing the pipe's durability.

Q: What are the different types of steel pipe supports for high-temperature applications?: Some different types of steel pipe supports for high-temperature applications include hangers, clamps, brackets, and anchors. These supports are designed to withstand the elevated temperatures and provide stability and proper alignment to the piping system.

Q: What is the difference between galvanized iron pipe and galvanized steel pipe? Or called different, in fact, is referred to as galvanized pipe?: Just name different, all refers to GB/T 3091-2015 "low pressure fluid transport welding pipe" contained in the galvanized pipe.Galvanized pipe means zinc plated, suitable for water, air, heating, steam and gas and other low pressure fluid conveying straight welded steel pipe, longitudinal submerged arc welding (SAWL) steel pipe and spiral seam submerged arc welding (SAWH) steel pipe.

Q: Can steel pipes be used for conveying oil?: Yes, steel pipes can be used for conveying oil. Steel pipes are commonly used in the oil and gas industry for transporting oil due to their strength, durability, and resistance to corrosion. The high strength of steel pipes allows them to withstand the high pressure and temperature conditions that are often associated with oil transportation. Additionally, steel pipes are less prone to leakage and damage compared to other materials, making them a reliable choice for conveying oil over long distances. Moreover, the smooth interior surface of steel pipes helps to minimize friction and enhance the flow of oil. Overall, steel pipes are a preferred option for oil transportation due to their superior mechanical properties and long-term performance.

Q: What are the advantages of using stainless steel pipes?: There are several advantages of using stainless steel pipes. Firstly, stainless steel pipes have excellent corrosion resistance, making them suitable for various industries, including water supply, chemical processing, and oil and gas. Secondly, they have high strength and durability, allowing them to withstand extreme temperatures and pressure. Additionally, stainless steel pipes are hygienic and easy to clean, making them ideal for applications in the food and beverage industry. Lastly, they have a long lifespan and require minimal maintenance, resulting in cost savings in the long run.

Q: Galvanized steel pipe in addition to good rust resistance, what are the advantages?: First, the surface of the steel pipe is treated by embroidery, which is more durable, not faster than the rapid oxidation, and will not form white rust on the steel tube;Two. The steel pipe is fully protected. After heating, each part of the steel pipe is plated with zinc, and the concave convex part is protected;

Q: How are steel pipes protected against soil movement or settlement?: Steel pipes can be protected against soil movement or settlement through the use of various measures such as proper design and installation techniques, including the use of appropriate bedding materials, backfilling with compacted soil, and the addition of protective coatings or linings. Additionally, the implementation of geotechnical investigations and monitoring systems can help identify potential soil movement or settlement issues in advance, allowing for proactive measures to be taken to mitigate any potential damage to the steel pipes.

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