20# Seamless steel black pipe ASTM A106/API 5L/ASTM A106 GR.B

20# Seamless steel black pipe ASTM A106/API 5L/ASTM A106 GR.B

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Loading Port:: Tianjin

Payment Terms:: TT OR LC

Min Order Qty:: 10 m.t.

Supply Capability:: 1000 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 is the impact toughness of steel pipes?: The ability of steel pipes to withstand sudden or high-velocity impacts without fracturing or breaking is referred to as their impact toughness. This property measures the material's resistance to cracking when subjected to dynamic loading conditions. The impact toughness of steel pipes is highly significant as it determines their capacity to endure accidental impacts or external forces during transportation, installation, and operation. To evaluate the impact toughness of steel pipes, standardized tests such as the Charpy V-notch test or the Izod test are commonly utilized. These tests involve striking a notched sample of the steel pipe with a pendulum or a falling weight and measuring the amount of energy absorbed by the material until it fractures. The impact toughness is then calculated based on this energy absorption. A high impact toughness is desirable in steel pipes as it signifies a greater ability to absorb energy and resist fracture, making them more resilient to sudden impacts or loading conditions. This characteristic is particularly crucial in applications where steel pipes are exposed to high-stress environments, such as in oil and gas pipelines, automotive components, or structural applications. Several factors can influence the impact toughness of steel pipes, including their chemical composition, heat treatment, and microstructure. For instance, alloying elements like manganese, chromium, and nickel can enhance the impact toughness by promoting the formation of fine-grained microstructures and preventing crack propagation. Similarly, appropriate heat treatment processes like quenching and tempering can optimize the material's microstructure and mechanical properties, thereby improving its impact toughness. In conclusion, the impact toughness of steel pipes is a vital property that determines their ability to withstand sudden or high-velocity impacts. It is evaluated through standardized tests and can be influenced by factors such as chemical composition, heat treatment, and microstructure. A high impact toughness is desirable in steel pipes to ensure their structural integrity and resistance to fracture when subjected to dynamic loading conditions.

Q: What are the common sizes of steel pipes available?: The common sizes of steel pipes available vary depending on the specific industry or application. However, there are several standard sizes that are commonly used across different industries. These sizes are typically referred to by their nominal pipe size (NPS) or their outside diameter (OD). Some of the most common sizes of steel pipes include 1/8 inch, ¼ inch, ½ inch, ¾ inch, 1 inch, 1 ¼ inch, 1 ½ inch, 2 inch, 2 ½ inch, 3 inch, 3 ½ inch, 4 inch, 5 inch, 6 inch, 8 inch, 10 inch, 12 inch, 14 inch, 16 inch, 18 inch, 20 inch, 24 inch, 26 inch, 30 inch, 36 inch, 42 inch, 48 inch, and 54 inch. These sizes are commonly used in various applications such as plumbing, construction, oil and gas pipelines, structural supports, and industrial processes. It is important to note that these sizes may vary slightly depending on the specific industry standards or requirements. Additionally, steel pipes are available in different wall thicknesses, which are commonly referred to as schedules. The most common schedules include schedule 40, schedule 80, schedule 160, and schedule XXS (extra extra strong). The schedule number indicates the wall thickness of the pipe, with higher numbers indicating thicker walls. In conclusion, the common sizes of steel pipes available range from 1/8 inch to 54 inches in diameter. These sizes are commonly used across various industries and applications, and they can vary in wall thickness based on the specific schedule.

Q: How do steel pipes handle pressure surges?: Steel pipes are designed to handle pressure surges effectively due to their inherent strength and durability. The high tensile strength of steel allows it to withstand significant pressure fluctuations without deforming or bursting. Additionally, the seamless construction of steel pipes ensures a smooth and continuous flow, minimizing the impact of pressure surges. Furthermore, steel pipes can be reinforced with additional support structures, such as braces or anchors, to further enhance their ability to handle pressure surges.

Q: What is the difference between steel pipe and copper pipe?: The composition and properties of steel pipe and copper pipe are what set them apart. Steel pipe is made from carbon steel, an alloy of iron and carbon, while copper pipe is made from naturally occurring copper. Durability is a key distinction. Steel pipe is renowned for its strength and resilience, making it suitable for high-pressure situations and harsh environments. It is highly resistant to corrosion, ensuring its longevity. On the other hand, copper pipe is prized for its malleability and ease of installation. It is not as durable as steel and can corrode over time, particularly when exposed to certain chemicals or aggressive water conditions. Another difference lies in thermal conductivity. Copper pipe is an exceptional heat conductor, making it perfect for applications requiring efficient heat transfer, such as plumbing systems for hot water supply. Conversely, steel pipe has lower thermal conductivity compared to copper, which may affect its performance in specific applications. Cost is also an important factor. Copper pipe tends to be pricier due to the higher cost of copper as a raw material. Moreover, installing copper pipe necessitates specialized tools and techniques, which can increase overall expenses. Conversely, steel pipe is often more cost-effective and easier to work with, making it a popular choice for various applications. In conclusion, the primary discrepancies between steel pipe and copper pipe encompass their composition, durability, thermal conductivity, and cost. Each type possesses its own advantages and disadvantages, and the selection between them hinges on the specific requirements of the given application.

Q: Can steel pipes be used for hydraulic systems?: Yes, steel pipes can be used for hydraulic systems. Steel pipes are commonly used in hydraulic systems due to their high strength, durability, and resistance to high pressure and temperature. They provide reliable performance and are suitable for a wide range of hydraulic applications.

Q: What are the different grades of steel used for pipes?: Pipes are manufactured using various grades of steel, each possessing unique properties and applications. Some commonly utilized grades include: 1. Carbon Steel: This type of steel is widely employed in pipe manufacturing, particularly for low-pressure purposes. It contains a low carbon content, typically less than 0.30%, facilitating easy welding and forming. Carbon steel pipes are known for their durability and cost-effectiveness, making them suitable for diverse industries. 2. Stainless Steel: Stainless steel pipes are renowned for their corrosion resistance and high strength. They consist of an alloy of iron and chromium, with additional elements like nickel and molybdenum enhancing their properties. These pipes find extensive usage in industries such as chemical processing, food production, and oil and gas, where corrosion resistance is vital. 3. Alloy Steel: Alloy steel pipes are created by incorporating elements like manganese, chromium, or nickel into carbon steel. This enhances their strength, hardness, and wear resistance, rendering them appropriate for high-pressure and high-temperature applications. Industries such as power generation, petrochemical, and aerospace frequently employ alloy steel pipes. 4. Duplex Steel: Duplex steel represents a type of stainless steel that combines austenite and ferrite phases. This results in a material possessing exceptional strength, corrosion resistance, and toughness. Duplex steel pipes are commonly utilized in offshore oil and gas platforms, as well as in chemical and petrochemical industries. 5. Low-Temperature Steel: Low-temperature steel is specifically designed to withstand extremely cold temperatures without becoming brittle. These pipes find significant use in industries such as cryogenic storage, LNG transportation, and refrigeration. Choosing the appropriate grade of steel is crucial to ensure optimal pipe performance and longevity. Factors such as temperature, pressure, corrosion resistance, and cost should be taken into account when selecting the steel grade for pipes.

Q: What are the main components of a steel pipe?: The main components of a steel pipe are the base metal, which is typically made of carbon steel or alloy steel, and the protective coating, which is applied to prevent corrosion and enhance durability. Additionally, joints or connections are important components that allow for the seamless connection of multiple pipes.

Q: How do steel pipes differ from other types of pipes?: Steel pipes possess several distinct characteristics that set them apart from other pipe types. Primarily, their strength and durability are well-known. They exhibit remarkable resistance to heat, pressure, and corrosion, rendering them suitable for numerous applications. Additionally, their robustness allows them to bear heavy loads and offer an extended service life. One distinguishing feature of steel pipes lies in their versatility. They can be manufactured in various shapes and sizes to fulfill specific project requirements. This adaptability has contributed to their popularity across a diverse range of industries, including construction, oil and gas, water treatment, and manufacturing. Moreover, steel pipes exhibit exceptional thermal conductivity, facilitating efficient heat transfer between different areas. Consequently, they prove suitable for applications involving heating and cooling systems, as well as the transportation of hot fluids or gases. Furthermore, steel pipes are renowned for their resistance to fire. They possess a high melting point and are not easily ignited or conducive to the spread of flames. This characteristic is particularly critical in applications where fire safety is a concern, such as buildings or industrial facilities. Lastly, although steel pipes may entail a higher initial cost compared to other pipe types, their long-term benefits, such as durability and low maintenance requirements, often outweigh the initial investment. Additionally, steel pipes are highly recyclable, making them an environmentally friendly choice. In summary, steel pipes stand out due to their strength, durability, versatility, excellent thermal conductivity, fire resistance, and recyclability. These remarkable qualities establish steel pipes as the preferred option for a wide range of applications across various industries.

Q: What are the common challenges faced during steel pipe installation?: During steel pipe installation, there are several common challenges that may arise. One challenge is ensuring proper alignment and fit between pipe sections. Steel pipes are typically joined together using welding or threading, and if the alignment is not precise, it can result in leaks or weak points in the pipeline. To overcome this challenge, careful measurements and alignment techniques must be used to ensure a secure and tight fit between pipe sections. Another challenge is dealing with corrosion and rust. Steel pipes are susceptible to corrosion, especially when exposed to moisture or corrosive substances. This can lead to degradation of the pipe over time, compromising its structural integrity and increasing the likelihood of leaks. To address this challenge, protective coatings or linings can be applied to the steel pipes to prevent corrosion and extend their lifespan. Additionally, the weight and size of steel pipes can pose a challenge during installation. Steel pipes are heavy, and maneuvering and positioning them can be physically demanding. Moreover, the large diameter of some steel pipes makes it difficult to transport and handle them in tight spaces or through narrow pathways. Overcoming this challenge often requires the use of heavy machinery, such as cranes or forklifts, to lift and position the pipes properly. Lastly, environmental factors can also present challenges during steel pipe installation. Extreme temperatures, harsh weather conditions, or unstable soil conditions can impact the installation process. For example, freezing temperatures can make it challenging to weld the pipes, while unstable soil may require additional reinforcement or stabilization measures to ensure the durability of the pipeline. In conclusion, the common challenges faced during steel pipe installation include ensuring proper alignment, dealing with corrosion and rust, handling the weight and size of the pipes, and addressing environmental factors. Overcoming these challenges requires careful planning, attention to detail, and the use of appropriate techniques and equipment.

Q: What are the advantages of using steel pipes over other materials like PVC or copper?: There are several advantages of using steel pipes over other materials like PVC or copper. Firstly, steel pipes are extremely durable and can withstand high pressure and extreme temperatures, making them ideal for various applications including industrial and underground use. Secondly, steel pipes have a longer lifespan compared to PVC or copper, reducing the need for frequent replacements and maintenance. Additionally, steel pipes are more resistant to corrosion and are not prone to cracking or leaking, ensuring a reliable and leak-free plumbing system. Lastly, steel pipes have a higher fire resistance rating compared to PVC, making them a safer option for certain environments.

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