Seamless steeI tubes for structures

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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:What is an electric welded pipe (EFW)? Seek help！: According to the operation requirements of the electric welding machine, connect the lead wire and set up the proper welding parameter of the electric welding machine, which can be operated by manual or automatic two input methods.After checking, start the electric welding machine and enter the welding process. When the welding time is reached, the machine will automatically enter the cooling state.When the pipe completely removed after cooling, electric fusion welding machine.Cutting the pipe with the cutting tool of plastic pipe or fine toothed saw with cutting guide device, and making its end face perpendicular to the axis of pipe. Remove the edges of the edges with a knife, scrape the weld area in the pipe or spigot end and clean the weld area.Should use the special fixture as far as possible to secure the components to be connected, and the roundness of the pipe shall not exceed 1.5% of the outer diameter of the pipe, or it should be corrected on the corresponding fixture.

Q:Can steel pipes be used for nuclear power plants?: Yes, steel pipes can be used for nuclear power plants. Steel is commonly used in the construction of nuclear power plants due to its strength, durability, and resistance to high temperatures and pressures. However, the specific type of steel and its properties must meet the rigorous safety and quality standards set by regulatory bodies to ensure the integrity and reliability of the nuclear power plant.

Q:How are steel pipes used in the mining industry?: Steel pipes are commonly used in the mining industry for various purposes such as transporting minerals, water, and gases underground, as well as for constructing mine shafts, tunnels, and mine infrastructure due to their durability, strength, and resistance to corrosion.

Q:What is the difference between steel pipes and copper pipes?: The main difference between steel pipes and copper pipes lies in their material composition. Steel pipes are made of iron and carbon, while copper pipes are composed of copper metal. Additionally, steel pipes are generally more durable and can withstand higher pressure and temperature levels, making them suitable for industrial applications. On the other hand, copper pipes are more malleable and easily bent, making them ideal for residential plumbing systems. Moreover, copper pipes have better corrosion resistance compared to steel pipes, which may require coatings or treatments to prevent rusting.

Q:DN80 seamless steel tube, what is the standard thickness?: The DN80 specification is 89*6 seamless steel management formula = (outside diameter wall thickness) * wall thickness *0.02466= per meter weight

Q:What are the safety precautions to follow while working with steel pipes?: When working with steel pipes, it is important to follow several safety precautions to ensure a safe working environment. These precautions include wearing appropriate personal protective equipment (PPE), such as gloves, steel-toed boots, and safety glasses, to protect against potential hazards. It is also crucial to inspect the pipes for any defects or damage before use to avoid accidents. Additionally, workers should be trained on proper handling and lifting techniques to prevent strains or injuries. Finally, it is essential to establish clear communication and adhere to safety protocols, such as using caution signs and barriers, to promote a safe work area for everyone involved.

Q:What are the typical lengths of steel pipes?: The typical lengths of steel pipes vary depending on their intended use and application. However, common lengths for steel pipes range from 18 to 24 feet (5.5 to 7.3 meters).

Q:What are the potential health hazards associated with steel pipe installation?: Some potential health hazards associated with steel pipe installation include exposure to hazardous chemicals used in the coating or treatment of the pipes, inhalation of dust or fumes generated during cutting or welding, and physical injuries due to accidents or mishandling of heavy equipment. Additionally, improper handling or disposal of waste materials and contaminated water can pose environmental health risks. It is important to follow proper safety protocols, use personal protective equipment, and ensure proper ventilation and waste management to mitigate these hazards.

Q:Can steel pipes be used for transporting chemicals?: Yes, steel pipes can be used for transporting chemicals. Steel pipes are known for their strength and durability, making them suitable for various applications, including the transportation of chemicals. Additionally, steel pipes are resistant to corrosion, which is crucial when dealing with potentially corrosive substances. However, it is important to ensure that the specific type of steel used in the pipes is compatible with the chemicals being transported to prevent any reactions or contamination.

Q:Can steel pipes be used for underground stormwater systems?: Yes, steel pipes can be used for underground stormwater systems. Steel pipes are durable and resistant to corrosion, making them a suitable choice for underground applications. Additionally, steel pipes can handle high volumes of stormwater, making them ideal for stormwater management systems.

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