Carbon black seamless steel pipe DIN17175 ST35

Carbon black seamless steel pipe DIN17175 ST35

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Loading Port:: Tianjin

Payment Terms:: TT OR LC

Min Order Qty:: 10 m.t.

Supply Capability:: 10000 m.t./month

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1. Commodity Name: Seamless steel pipe

2. Standard: API,GB,ASTM,ASME,DIN

3. Quality grade: 10#, 20#, A106B, A53B, API 5L B, Q235, Q345, ST37-2, ST 45, ST52.etc.

4. Dimension:

OD: 1/2"-24"

WT: 2.5-80mm, SCH10~SCH40~XXL

length: 5.8m,6m,8m,9m,12m

5. Technique: Hot Rolled/Cold Rolled/ Cold Drawn

6. application

carbon seamless steel pipes are widely used in gas, water and oil, transpotation;constructions;Bridge,highway,windows of model steel door; building materials;fences;heating facilities Fluid Pipe;conduit pipe,scaffolding pipe.etc.

7. Payment Terms: L/C D/A D/P T/T

8.packing and shipment

Packaged in bundles,as per customers' requirements, it can also bepackagesd as beveled ends, typed marking, black painting, plastic caps protection,woven bags packing

For 20" container the max length is 5.8m; For 40" container the max length is 12m. other options are available based on customer requests. Please discuss when placing orders.

9. Surface: painted with varnish;

10. Plastic caps at ends.

11. Tolerance: OD +1%/-1%

WT +12.5%/-10%

12. Chemical composition:

Models of Steel Pipes	Chemical Component
Steel 20 (ASTM A106B)	C	Si	Mn	P	S	Cu	Ni	Cr
Steel 20 (ASTM A106B)	0.17~0.24	0.17~0.37	0.35~0.65	0.035max	0.035max	0.25max	0.25max	0.25max
Steel45 (ASTM 1045)	0.42~0.50	0.17~0.37	0.50~0.80	0.035max	0.035max	0.25max	0.25max	0.25max
16Mn(Q345B)	0.12~0.20	0.20~0.55	1.20~1.60	0.035max	0.035max	0.25max	0.25max	0.25max
45Mn2 ( ASTM1345)	0.42~0.49	0.17~0.37	1.40~1.80	0.035max	0.035max	0.3max	0.3max	0.30max

Q:What are the different methods of repairing damaged steel pipes?: There are several methods for repairing damaged steel pipes, including welding, pipe lining, pipe bursting, and pipe patching. Welding involves cutting out the damaged section and replacing it with a new piece of pipe, which is then welded into place. Pipe lining is a method where a new pipe is inserted into the damaged one, creating a seamless and corrosion-resistant inner lining. Pipe bursting involves fracturing the damaged pipe while simultaneously pulling a new pipe through the old one, effectively replacing it. Pipe patching is a temporary fix that involves applying a patch over the damaged area using epoxy or other materials. The choice of method depends on the extent and location of the damage, as well as the desired durability and cost-effectiveness of the repair.

Q:How do steel pipes perform in high-altitude applications?: Steel pipes perform well in high-altitude applications due to their inherent strength and durability. The high tensile strength of steel allows it to withstand the harsh conditions and extreme temperature variations experienced at high altitudes. Furthermore, steel pipes are resistant to corrosion, making them suitable for use in high-altitude environments where exposure to moisture and atmospheric gases is common. Overall, steel pipes are a reliable choice for various high-altitude applications, including oil and gas transportation, construction, and infrastructure development.

Q:What is the buckling type thin-wall steel pipe? What is a tight set of thin-walled steel tubes? What's the difference between the two?: The thread of the tightening (JDG) joint is unified with an outer thread, a wall thickness of 1.5mm, and a button (KBG). The thread of the joint is an internal thread, and the wall thickness is 1.0mm. Withholding type joint for the use of the same company and pipe connection to matching products with complete connection clamp buckle. Fastening and pressing type correctly connected and locked after no need to do a cross ground.

Q:Can steel pipes be used in earthquake-prone areas?: Indeed, in areas prone to earthquakes, steel pipes have the potential to be employed. Steel, as a durable and sturdy material, possesses the capacity to endure the forces generated during an earthquake. The malleability and pliability of steel facilitate the absorption and dissipation of seismic wave energy, thereby decreasing the likelihood of structural failure. Furthermore, the ability to weld steel pipes enables the construction of resilient and earthquake-resistant edifices. Nevertheless, it is crucial to adhere to appropriate engineering and construction practices to guarantee the proper installation and connection of steel pipes, thereby maximizing their capacity to withstand earthquakes. Additionally, it is imperative to consider local building codes and regulations to ensure compliance and safety in earthquake-prone regions.

Q:What are the common methods for inspecting the condition of steel pipes?: Steel pipes can be inspected using a variety of methods to ensure their condition and integrity. These methods aim to identify any issues or defects that could potentially affect the pipes. 1. Visual Inspection: Inspectors thoroughly examine the pipes visually to spot any visible signs of damage such as corrosion, cracks, or leaks. They may employ tools like flashlights, mirrors, or borescopes to reach difficult areas. 2. Ultrasonic Testing: This method utilizes high-frequency sound waves to detect defects within the steel pipes. A transducer emits sound waves, and disruptions or reflections in these waves can indicate potential issues like cracks or thinning of the pipe walls. 3. Magnetic Particle Testing: Primarily used to detect surface cracks or defects, this technique applies a magnetic field to the pipe. Fine iron particles are then applied to the surface, and they accumulate at areas with surface defects, making them clearly visible. 4. Eddy Current Testing: This non-destructive testing method detects surface and near-surface defects in steel pipes. It involves passing an alternating current through a coil, inducing eddy currents in the pipe. Disruptions or changes in these eddy currents can indicate defects like corrosion or cracks. 5. Radiographic Testing: X-rays or gamma rays are used in this method to inspect the internal structure of steel pipes. X-ray film or a digital detector is placed on one side of the pipe, while the X-ray source is positioned on the other side. The rays penetrate the steel, and any irregularities or defects can be identified on the film or through digital imaging. 6. Dye Penetrant Inspection: This technique is employed to detect surface-breaking defects in steel pipes. A dye penetrant is applied to the pipe's surface, and after a specified time, a developer is used to draw out the dye from any defects, making them easily visible. Whether used individually or in combination, these methods provide a comprehensive inspection of steel pipes, ensuring their reliability and safety in industries like oil and gas, construction, and manufacturing.

Q:Can steel pipes be used for underground power transmission?: Yes, steel pipes can be used for underground power transmission. Steel pipes are commonly used in underground power transmission systems due to their durability, strength, and resistance to corrosion. They provide a protective casing for the power cables, ensuring their safety and preventing damage from external factors such as moisture, soil movements, and potential impacts. Steel pipes also allow for easy installation, maintenance, and repair of the power transmission system. Additionally, their ability to withstand high pressure and temperature makes them suitable for carrying the high voltage electricity required for power transmission. Overall, steel pipes are a reliable and efficient choice for underground power transmission.

Q:What is the difference between nominal and actual pipe size?: Nominal pipe size refers to the designation used to identify the approximate inside diameter of a pipe, while actual pipe size refers to the measured inside diameter of a pipe. The nominal size is a standardized value, whereas the actual size may vary slightly due to manufacturing tolerances.

Q:Can steel pipes be used for transporting sewage?: Yes, steel pipes can be used for transporting sewage. Steel pipes are strong, durable, and resistant to corrosion, making them suitable for sewage transportation systems.

Q:Is there any difference between thermal expansion seamless steel pipe and seamless steel pipe?: Differ,Thermal expansion seamless steel tube is what we often call "thermal expansion tube", the density is relatively low, but a strong contraction of the steel pipe, (seamless steel pipe) can be referred to as "heat expansion.". A finishing rolling process for pipe rolling by using oblique rolling or drawing method to enlarge pipe diameter. In a relatively short period of time, the outer diameter of the steel pipe becomes larger, and the seamless tube with nonstandard and special type can be produced, and the cost is lower and the production efficiency is high, which is the development trend of the international rolling tube field at present.

Q:What is the difference between hot-dip galvanizing and electroplating for steel pipes?: Hot-dip galvanizing and electroplating are two common methods used to provide corrosion protection for steel pipes, but there are key differences between the two processes. Hot-dip galvanizing involves immersing the steel pipes into a bath of molten zinc, which forms a metallurgical bond with the steel. This results in a thick and durable zinc coating that provides excellent corrosion resistance. The process of hot-dip galvanizing creates a uniform coating that covers the entire surface of the steel pipe, including both the external and internal surfaces. This makes hot-dip galvanizing particularly effective for protecting both the inside and outside of the pipes. On the other hand, electroplating is a process that involves the deposition of a thin layer of metal onto the surface of the steel pipes using an electric current. In the case of electroplating for steel pipes, typically a layer of zinc is applied. Unlike hot-dip galvanizing, electroplating does not provide a metallurgical bond between the zinc and the steel. Instead, it creates a mechanical bond, which is not as strong or durable as the bond formed through hot-dip galvanizing. The electroplated zinc layer is thinner compared to hot-dip galvanizing, which means it may not provide the same level of corrosion protection. Another difference between hot-dip galvanizing and electroplating is the application process. Hot-dip galvanizing requires immersing the steel pipes into a bath of molten zinc, which can be a time-consuming process. Electroplating, on the other hand, involves applying the zinc coating through an electrolytic cell, which can be faster and more efficient. In summary, the main difference between hot-dip galvanizing and electroplating for steel pipes lies in the thickness and durability of the coating, as well as the bonding mechanism between the zinc and the steel. Hot-dip galvanizing provides a thicker and more durable coating with a metallurgical bond, making it more effective for long-term corrosion protection. Electroplating, on the other hand, creates a thinner coating with a mechanical bond, which may be suitable for applications requiring a less robust level of corrosion resistance.

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