seamless steel tubes for construction System 1

seamless steel tubes for construction

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Loading Port:: Shanghai

Payment Terms:: TT OR LC

Min Order Qty:: 2000 m.t.

Supply Capability:: 10000 m.t./month

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Product Description:

Standards：
GB，_r81 62 Chinese national standard
ASTM A53 Standard of American Society of Testing Materials
ASME SA53 Boiler and pressure vessel--c-Ojrde of ASME
Application：
Seamless steel tubes for manufacturing pipelines。vessels，equipment and mechanical structures
Models of major steeI tubes：
1 O，20，35、45，Q345，1 5CrMo，1 2Crl MoV,A53A，A53B，SA53A，SA53B, 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/T8162	10	≥335	≥205	≥24
	20	≥390	≥245	≥20
	35	≥510	≥305	≥17
	45	≥590	≥335	≥14
	Q345	≥490	≥325	≥21
	15CrMo	≥440	≥295	≥22
	12Cr1MoV	≥490	≥245	≥22
ASTM A53 ASME SA53	A	≥330	≥205	Check the table in ASTM A 53 Check the table in ASME SA53
ASTM A53 ASME SA53	B	≥415	≥240	Check the table in ASTM A 53 Check the table in ASME SA53

Chemical composition:

Standard codes	Models of steel tubes	Chemical compositions（％）
Standard codes	Models of steel tubes	C	Si	Mn	P	S	Cu	Ni	Mo	Cr	V
GB/T8162	10	0.07～0.14	0.17～0.37	0.35～0.65	≤0.035	≤0.035	≤0.25	≤0.25	/	≤0.15	/
	20	0.17～0.24	0.17～0.37	0.35～0.65	≤0.035	≤0.035	≤0.25	≤0.25	/	≤0.25	/
	35	0.32～0.40	0.17～0.37	0.50～0.80	≤0.035	≤0.035	≤0.25	≤0.25	/	≤0.25	/
	45	0.42～0.50	0.17～0.37	0.50～0.80	≤0.035	≤0.035	≤0.25	≤0.25	/	≤0.25	/
	Q345	0.12～0.20	0.20～0.55	1.20～1.60	≤0.035	≤0.035	≤0.25	≤0.25	/	≤0.25	/
	15CrMo	0.12～0.18	0.17～0.37	0.40～0.70	≤0.035	≤0.035	≤0.25	≤0.30	0.40～0.55	0.80～1.10	/
	12Cr1MoV	0.08～0.15	0.17～0.37	0.40～0.70	≤0.035	≤0.035	≤0.25	≤0.30	0.25～0.35	0.90～1.20	0.15～0.30
ASTMA53 ASMESA53	A	≤0.25	/	≤0.95	≤0.05	≤0.06	≤0.40	≤0.40	≤0.15	≤0.40	≤0.08
ASTMA53 ASMESA53	B	≤0.30	/	≤1.20	≤0.05	≤0.06	≤0.40	≤0.40	≤0.15	≤0.40	≤0.08

Q:How do steel pipes perform in high-altitude applications?: Steel pipes perform well in high-altitude applications due to their strength, durability, and resistance to extreme weather conditions. They can withstand the low temperatures and high winds typically found at high altitudes, making them a reliable choice for various industries such as oil and gas, construction, and infrastructure development. Additionally, steel pipes have the ability to maintain their structural integrity under high pressure, making them suitable for transporting fluids and gases at high altitudes.

Q:What are the different types of steel pipe end connections?: Some of the different types of steel pipe end connections include threaded connections, socket weld connections, butt weld connections, and flanged connections.

Q:How are steel pipes used in the agricultural irrigation systems?: Steel pipes are commonly used in agricultural irrigation systems due to their durability and strength. These pipes are used to transport water from a water source, such as a well or a reservoir, to the fields where crops are grown. One of the main advantages of using steel pipes in agricultural irrigation systems is their ability to withstand high pressure and heavy loads. This makes them suitable for transporting large volumes of water over long distances without the risk of bursting or breaking. Steel pipes also have a high resistance to corrosion, which is important in agricultural settings where the pipes may come into contact with fertilizers or other chemicals. In addition to their durability, steel pipes provide a smooth interior surface that helps to minimize friction and maintain a consistent water flow. This is crucial in irrigation systems as it ensures that the water is evenly distributed across the fields, promoting optimal crop growth. Furthermore, steel pipes can be easily connected and configured to match the specific layout and requirements of the irrigation system. Overall, steel pipes play a vital role in agricultural irrigation systems by facilitating the efficient and reliable transport of water to crops. Their strength, durability, resistance to corrosion, and smooth interior surface make them an ideal choice for these applications.

Q:How are steel pipes used in the construction of stadiums and arenas?: Steel pipes are commonly used in the construction of stadiums and arenas for various purposes such as structural support, plumbing, and HVAC systems. They provide a strong and durable framework for the building, allowing for large spans and open spaces. Additionally, steel pipes are used for the distribution of water, gas, and waste, as well as for ventilation and air conditioning systems. Overall, steel pipes play a crucial role in ensuring the safety, functionality, and longevity of stadiums and arenas.

Q:What is the process of spiral steel tube production?: X ray flaw detection: 100% X ray industrial television inspection of internal and external weld seams, and image processing system is adopted to ensure the sensitivity of flaw detection.8. press test: the steel pipe is tested by root test on the water pressure test machine to ensure the test pressure of the steel pipe to meet the standard requirement.9. chamfering flat head: the qualified steel pipe is processed at the end of the pipe to achieve the required size of the end of the pipe10. final inspection: ultrasonic and X ray inspection, and magnetic particle inspection at the end of pipe to check for welding problems and pipe end defects.11., marking: qualified steel pipe for oil, in order to prevent corrosion, and according to user requirements for marking.

Q:Can steel pipes be used for pharmaceutical manufacturing plants?: Yes, steel pipes can be used for pharmaceutical manufacturing plants. Steel pipes are known for their durability, strength, and resistance to corrosion, making them suitable for transporting various fluids and chemicals used in pharmaceutical production. Additionally, steel pipes can be easily sanitized and meet industry standards for cleanliness, making them a reliable choice for pharmaceutical manufacturing facilities.

Q:Can steel pipes be used for transporting chemicals?: Yes, steel pipes can be used for transporting chemicals. Steel pipes are known for their high strength and durability, making them suitable for handling various chemicals, including corrosive substances. Additionally, steel pipes can withstand high pressure and temperature conditions, ensuring the safe transportation of chemicals. However, it is essential to select the appropriate grade of steel and implement proper coating or lining to prevent chemical reactions or corrosion that may compromise the integrity of the pipes.

Q:What are the different types of steel pipe supports for thermal expansion?: There are several types of steel pipe supports for thermal expansion, including fixed supports, sliding supports, and variable spring supports. Fixed supports are rigid and do not allow for movement, while sliding supports allow for limited axial movement. Variable spring supports use mechanical springs to accommodate thermal expansion and contraction, providing continuous support while allowing for movement.

Q:What are the different types of joints used to connect steel pipes?: There are several types of joints commonly used to connect steel pipes, including threaded joints, flanged joints, welded joints, and mechanical joints. Each type of joint has its own advantages and is chosen based on factors such as the application, pipe size, and pressure requirements.

Q:Can steel pipes be insulated for thermal efficiency?: Steel pipes can indeed be insulated to enhance their thermal efficiency. By insulating steel pipes, heat loss or gain can be minimized, depending on the specific purpose. Typically, the insulation material is wrapped around the pipes, creating a protective barrier. This barrier effectively prevents heat transfer between the pipes and the surrounding environment. As a result, the energy required to heat or cool the fluid flowing through the pipes is significantly reduced, leading to improved energy efficiency. This practice is widely employed in industries such as HVAC, oil and gas, and industrial processes, where precise temperature control is crucial. Moreover, insulation also serves to prevent condensation and corrosion on the outer surface of the pipes. All in all, insulating steel pipes is a cost-effective measure that enhances thermal efficiency and reduces energy consumption.

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