Seamless hot rolled black steel pipe Gr.B

Seamless hot rolled black steel pipe Gr.B

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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: How do steel pipes compare to other materials like PVC or copper pipes?: Steel pipes are known for their durability and strength, making them highly preferable for applications that require high pressure and extreme temperatures. In comparison to PVC pipes, steel pipes offer superior resistance to impact, corrosion, and fire, making them suitable for harsh environments. Copper pipes, on the other hand, are primarily used for plumbing and heating systems due to their excellent heat conductivity. While steel pipes may be more expensive than PVC or copper, their robustness and longevity make them a reliable choice for various industrial and infrastructure projects.

Q: How are steel pipes protected against mechanical damage during transportation?: Steel pipes are protected against mechanical damage during transportation through various measures. One common method is the use of protective coating or wrapping materials. These coatings are usually made of materials like plastic, rubber, or epoxy, which provide a physical barrier to protect the pipes from scratches, dents, or other forms of mechanical damage. Another method is the use of padding or cushioning materials such as foam inserts or rubber gaskets. These materials are placed inside the pipes or around them to absorb any impact or shock during transportation. This helps prevent any potential damage caused by bumps or vibrations. In addition, steel pipes are often secured and immobilized within transportation containers using straps, braces, or other securing devices. These measures ensure that the pipes remain stable and do not move or collide with each other, reducing the risk of mechanical damage. Furthermore, proper handling and loading techniques are crucial in protecting steel pipes during transportation. This includes using appropriate lifting equipment, such as cranes or forklifts, to avoid dropping or mishandling the pipes. Additionally, pipes are often stored or stacked in a way that minimizes the risk of deformation or bending. Overall, a combination of protective coatings, cushioning materials, securement devices, and proper handling techniques are employed to safeguard steel pipes against mechanical damage during transportation. These measures help ensure that the pipes arrive at their destination in optimal condition, ready for use in various applications.

Q: Can steel pipes be used for geothermal heating systems?: Yes, steel pipes can be used for geothermal heating systems. Steel pipes are commonly used for their durability and ability to withstand high temperatures and pressures. They are suitable for transferring geothermal heat from the ground to the heating system within a building. However, it is important to consider the specific requirements of the geothermal system and consult with professionals to ensure proper installation and compatibility with the system components.

Q: How are steel pipes used in the construction of offshore oil rigs?: Steel pipes are commonly used in the construction of offshore oil rigs for various purposes. They are primarily utilized for drilling operations, transporting oil and gas from the seabed to the surface, and for the installation of pipelines and risers. These pipes are known for their strength, durability, and ability to withstand harsh offshore environments, making them an essential component in ensuring the safe and efficient extraction of oil and gas from deep-sea reserves.

Q: How are steel pipes used in the transportation industry?: Steel pipes are used in the transportation industry for various purposes, including the construction of pipelines for transporting oil, gas, and other fluids. They are also used in the manufacturing of vehicles, such as cars, trucks, and trains, where they are commonly used for exhaust systems and structural components. Additionally, steel pipes are utilized in the construction of bridges, tunnels, and other infrastructure projects that support transportation networks.

Q: Is there a weld on the outer wall of seamless steel tube?: As you have said this, you have to fake goods is seamless, commonly known as to seamless steel pipe, seamless steel pipe is welded pipe weld reinforcement, and then go inside and outside the weld is worn away, and then burn side is that you say is that, after you can see the wall friction of a weld, is not too obvious. Like a polished, but no wall bulge, can not see the seam,

Q: Are steel pipes suitable for underground installations in areas with high moisture content?: In areas with high moisture content, steel pipes are commonly used for underground installations. However, it is important to consider certain factors when utilizing steel pipes in such conditions. Prolonged exposure to moisture can lead to corrosion, which is a significant concern. To mitigate this risk, it is crucial to employ steel pipes that are specifically designed for underground installations and are coated with protective materials like epoxy or polyethylene. These protective coatings act as a barrier between the steel and the surrounding moisture, preventing corrosion and prolonging the lifespan of the pipes. Furthermore, proper installation techniques, including sufficient pipe bedding and backfilling, must be adhered to in order to ensure that the pipes are adequately supported and shielded from external forces. Regular inspection and maintenance are also advisable to promptly identify any signs of corrosion or damage and address them accordingly. Overall, by taking the appropriate precautions and conducting regular maintenance, steel pipes can be a viable choice for underground installations in areas with high moisture content.

Q: How to make the steel pipe spray paint is not easy to fall off?: First, clean the surface of the object to be sprayed (pay attention to whether or not to paint off, which is the key):Remove rust stains, oil and so on, when spraying, the nozzle and spray the best distance is 20cm, should be two times forming, first thin spray again, dry, and then spray second times, this is more uniform, and not easy to hang

Q: What are the disadvantages of using steel pipes?: One major disadvantage of using steel pipes is their susceptibility to corrosion. Over time, exposure to moisture and certain chemicals can cause the pipes to rust and weaken, leading to leaks or structural damage. Additionally, steel pipes are generally heavier and more expensive than alternative materials, making them less suitable for certain applications where weight and cost are crucial factors.

Q: How are steel pipes protected against microbial corrosion?: Steel pipes are protected against microbial corrosion through various methods. One common method is the use of coatings on the pipe's surface. These coatings act as a barrier between the steel and the surrounding environment, preventing the entry of microbes and their corrosive byproducts. Coatings such as epoxy, polyethylene, and fusion bonded epoxy are often applied to the pipes to provide this protection. Another method is the use of corrosion inhibitors. These inhibitors are added to the fluid flowing through the pipe to inhibit microbial growth and prevent corrosion. These inhibitors can be organic or inorganic compounds that work by either killing the microbes or inhibiting their metabolic activity. Additionally, proper maintenance and cleaning of the pipes are crucial in preventing microbial corrosion. Regular inspections and cleaning can help remove any biofilms or microbial deposits that may have formed on the pipe's surface. This reduces the potential for microbial corrosion and extends the lifespan of the pipes. In some cases, cathodic protection may also be employed. This involves the use of sacrificial anodes or impressed current systems to provide a protective electrical current to the pipe. This current helps to prevent the formation of corrosive microorganisms and protects the steel from corrosion. Overall, a combination of coatings, corrosion inhibitors, regular maintenance, and cathodic protection techniques are used to protect steel pipes against microbial corrosion. These strategies help to ensure the longevity and integrity of the pipes in various industries, such as oil and gas, water supply, and sewage systems.

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