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:What are the different types of steel pipe coatings for underground applications?: There are several types of steel pipe coatings used for underground applications, including fusion bonded epoxy (FBE), coal tar enamel (CTE), polyethylene (PE), and polyurethane (PU). These coatings provide corrosion protection and increase the lifespan of the steel pipes in underground environments.

Q:What are the different testing methods for steel pipes?: Some of the different testing methods for steel pipes include visual inspection, ultrasonic testing, magnetic particle testing, radiographic testing, and hydrostatic testing.

Q:How do you determine the required support spacing for steel pipes?: Various factors, including the diameter of the pipe, the strength of the material, the operating conditions, and local building codes and regulations, determine the required support spacing for steel pipes. When considering the diameter of the pipe, it is crucial to note that larger pipes generally need more frequent support to prevent excessive deflection and sagging compared to smaller pipes. The strength of the material is also a significant consideration, as pipes with greater strength can span longer distances without requiring additional support. The operating conditions of the pipe, such as the type of fluid being transported and the temperature, also play a role in determining the necessary support spacing. For instance, pipes carrying heavy or corrosive fluids may require more frequent support to prevent excessive stress and potential failure. Local building codes and regulations often provide specific guidelines for the minimum support spacing of steel pipes. These regulations take into account factors such as the diameter of the pipe, the strength of the material, the operating conditions, as well as safety and structural requirements. To accurately determine the required support spacing for steel pipes, it is essential to consult relevant codes, standards, and engineering guidelines. Additionally, working with qualified engineers and professionals experienced in pipe design and installation will ensure that the support spacing meets all necessary requirements, ensuring the safe and efficient operation of the piping system.

Q:What are the different types of steel pipe caps?: There are several different types of steel pipe caps, each designed for specific purposes and applications. Some common types include: 1. Threaded Caps: These caps have internal threads that allow them to be screwed onto the end of a threaded pipe, providing a secure seal. They are commonly used in plumbing and gas applications. 2. Socket Weld Caps: These caps are designed to be welded onto the end of a pipe using a socket weld connection. They provide a strong and permanent seal, making them suitable for high-pressure and high-temperature applications. 3. Butt Weld Caps: Similar to socket weld caps, butt weld caps are also used for welding onto the end of a pipe. However, they are specifically designed for butt welding, which involves welding the cap directly to the pipe without any additional fittings. 4. Domed Caps: These caps have a domed or rounded shape on the upper surface, providing a smooth and aesthetically pleasing finish. They are commonly used in architectural and decorative applications, such as handrails or fence posts. 5. Flat Caps: As the name suggests, flat caps have a flat surface on the upper side. They are often used when a simple and low-profile cap is required, such as for protecting the ends of pipes in industrial applications. 6. Blind Caps: Blind caps are used to seal off the end of a pipe permanently. They are solid caps without any openings or threads, ensuring a complete closure. They are commonly used in piping systems where a section of the pipeline is not in use or needs to be closed off temporarily. These are just a few examples of the different types of steel pipe caps available. The choice of cap depends on the specific requirements of the application, such as the type of connection, pressure, temperature, and the need for structural or decorative finishes. It is important to select the appropriate cap to ensure a secure and reliable seal for the pipe.

Q:What are the different types of steel pipes available in the market?: In the market, one can find a variety of steel pipes, each designed for specific purposes and applications. Some of the commonly used types are as follows: 1. Carbon Steel Pipes: These pipes are widely utilized due to their strength and durability. They are primarily employed in industries like oil and gas, construction, and plumbing for fluid and gas transportation. 2. Alloy Steel Pipes: By combining carbon steel with different metals like chromium, nickel, or molybdenum, alloy steel pipes offer enhanced strength, corrosion resistance, and heat resistance. They find applications in high-pressure environments such as power plants and chemical plants. 3. Stainless Steel Pipes: Highly resistant to corrosion and oxidation, stainless steel pipes are suitable for applications requiring hygiene and durability. Industries like food processing, pharmaceuticals, and water treatment commonly use them. 4. Galvanized Steel Pipes: These pipes are coated with a layer of zinc to protect against rust and corrosion. They are commonly found in plumbing systems and structures like fences and handrails. 5. Seamless Steel Pipes: These pipes are manufactured without any welding or joints, resulting in a smooth and continuous surface. They are known for their high strength and are often used in high-pressure applications. 6. Welded Steel Pipes: Made by rolling or bending a flat steel plate into a cylindrical shape and welding the edges together, welded pipes find common usage in construction, oil and gas, and automotive industries. 7. ERW (Electric Resistance Welded) Steel Pipes: ERW pipes are produced by passing a high-frequency electrical current through a steel strip, causing it to heat and form a weld. They are widely utilized in plumbing, water wells, and structural support. 8. LSAW (Longitudinal Submerged Arc Welded) Steel Pipes: LSAW pipes are created by bending and welding steel plates into a cylindrical shape. They are commonly employed for long-distance transportation of large volumes of oil, gas, or water. These examples represent only a fraction of the diverse range of steel pipes available in the market. The choice of the appropriate pipe type depends on factors such as the intended application, environmental conditions, and budget constraints. Consulting with experts or professionals is crucial in determining the most suitable steel pipe for a specific project or application.

Q:How are steel pipes used in the electronics industry?: Steel pipes are commonly used in the electronics industry for various purposes such as cable management, structural support, and conduit systems. They provide a strong and durable solution for organizing and protecting electrical wires and cables. Additionally, steel pipes are utilized in the construction of electronic equipment enclosures and racks, ensuring stability and efficient cooling.

Q:What are the different types of expansion joints used with steel pipes?: There are several types of expansion joints commonly used with steel pipes, including bellows expansion joints, slip expansion joints, and flanged expansion joints. Bellows expansion joints are flexible connectors made of a series of convolutions that allow for axial, lateral, and angular movement. Slip expansion joints consist of two pipe sections with a sliding sleeve in between, allowing for limited axial movement. Flanged expansion joints are designed with flanged ends to provide flexibility and accommodate movement in all directions. These various types of expansion joints are used to absorb thermal expansion, vibration, and misalignment in steel pipe systems.

Q:How do you calculate the deflection of a steel pipe?: To calculate the deflection of a steel pipe, you can use the formula for beam deflection, which takes into account the pipe's dimensions, material properties, and applied load. The specific equation you would use depends on the type of loading and support conditions. However, generally, you would need to determine the moment of inertia of the pipe cross-section, the modulus of elasticity of the steel, and the applied load to calculate the deflection.

Q:How are steel pipes used in irrigation systems?: Steel pipes are commonly used in irrigation systems to transport water from a water source, such as a well or reservoir, to the fields or crops that need to be irrigated. These pipes are durable, strong, and resistant to weathering and corrosion, making them ideal for outdoor use. They can be laid underground or above ground, and their flexibility allows for easy installation and maintenance. Steel pipes in irrigation systems ensure a reliable and efficient water supply to promote healthy plant growth and maximize crop yields.

Q:What are the future trends in steel pipe manufacturing?: Some of the future trends in steel pipe manufacturing include the use of advanced automation and robotics, the development of high-strength and lightweight steel materials, the implementation of sustainable and environmentally friendly manufacturing processes, and the integration of digital technologies for improved quality control and efficiency. Additionally, there is a growing focus on developing steel pipes with enhanced corrosion resistance and durability to meet the demands of various industries such as oil and gas, construction, and automotive.

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