Cold draw black seamless steel tube made in China

Cold draw black seamless steel tube made in China

Ref Price:

Loading Port:: Tianjin

Payment Terms:: TT OR LC

Min Order Qty:: 10 m.t.

Supply Capability:: 10000 m.t./month

Inquire Now

Add to My Favorites

OKorder Service Pledge

Quality Product, Order Online Tracking, Timely Delivery

OKorder Financial Service

Credit Rating, Credit Services, Credit Purchasing

You Might Also Like

High Quality Hollow Section-Square Tubes

Seamless Carbon And Alloy Steel Mechanical Tubing

High Quality ASTM A53 ERW Welded Steel Pipe

ERW Welded Pipes

API 5L Seamless Line Pipe

Seamless steel pipe ASTM A106/API 5L/ASTM A53 grade B high quality

Seamless Steel Pipe Cold Rolled/ Cold Drawn

Galvanized pipe ASTM A53 100g/200g hot dipped / pre galvanized pipe

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: 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: How are steel pipes used in the manufacturing of scaffolding?: Steel pipes are commonly used in the manufacturing of scaffolding as they provide a strong and durable framework. They are used to create the main structure of the scaffolding, providing support and stability for workers and materials. The pipes are typically joined together using fittings, allowing for easy assembly and disassembly of the scaffolding system. Additionally, steel pipes can be easily adjusted to different heights and configurations, making them a versatile choice for scaffolding construction.

Q: How are steel pipes used in high-rise buildings?: Steel pipes are commonly used in high-rise buildings for various purposes. They are primarily used for structural support as they provide strength and durability, allowing the building to withstand the vertical loads and forces that occur due to its height. Steel pipes are also used for plumbing systems, carrying water and other fluids throughout the building. Additionally, they can be used for HVAC systems, providing ventilation and air conditioning to each floor. Overall, steel pipes are integral components in high-rise buildings, ensuring the safety, functionality, and comfort of the occupants.

Q: How do you protect steel pipes from fire?: There are several measures available to protect steel pipes from fire. One commonly used approach involves applying fire-resistant coatings or paints to the surface of the pipes. These coatings or paints are specifically designed to endure high temperatures and create a barrier that prevents heat from reaching the steel. Another effective method is to wrap the steel pipes with fire-resistant insulation materials. These materials serve as a buffer, reducing heat transfer and slowing down the spread of fire. Mineral wool or ceramic fiber blankets are commonly utilized for this purpose. It is also crucial to ensure proper installation and support for the steel pipes. This includes maintaining adequate clearance from other flammable substances and avoiding overcrowding or obstructions that could hinder the flow of air around the pipes. Sufficient spacing between pipes is also essential to prevent heat transfer between them. Moreover, incorporating firestop systems is recommended when steel pipes pass through fire-rated walls or floors. These systems consist of fire-resistant materials and seals that prevent the spread of fire and smoke through openings or penetrations in fire-rated barriers. Regular maintenance and inspections are essential to uphold the ongoing effectiveness of the fire protection measures. Any damage or deterioration of the coatings, insulation, or firestop systems should be promptly addressed to maintain the fire resistance of the steel pipes. In conclusion, a combination of fire-resistant coatings, insulation, proper installation, and maintenance practices is imperative for safeguarding steel pipes against fire hazards. These measures play a crucial role in minimizing the risk of fire-related damage and ensuring the safety of both the pipes and the surrounding environment.

Q: What is the difference between hot-dipped galvanized and electro-galvanized steel pipes?: Both hot-dipped galvanized and electro-galvanized steel pipes undergo a galvanization process to protect them from corrosion. However, there are distinct differences between the two methods. Hot-dipped galvanized steel pipes are immersed in molten zinc, resulting in a thick zinc coating on the steel's surface. This creates a durable and long-lasting barrier against corrosion. The thickness of the zinc coating varies, but it is generally thicker than that of electro-galvanized steel pipes. In contrast, electro-galvanized steel pipes are coated with a thin layer of zinc through an electroplating process. This involves passing an electric current through the pipes while they are submerged in a zinc solution. The zinc particles are then deposited onto the steel's surface, creating a thin and uniform protective layer. One key difference is the thickness of the zinc coating. Hot-dipped galvanized steel pipes have a thicker and more robust coating, making them suitable for harsh environments or exposure to corrosive materials. Another distinction is the appearance of the pipes. Hot-dipped galvanized steel pipes typically have a dull grayish finish, while electro-galvanized steel pipes have a smoother and more polished look. In terms of cost, electro-galvanized steel pipes are generally more economical because the electroplating process requires less labor and zinc. Ultimately, the choice between hot-dipped galvanized and electro-galvanized steel pipes depends on the specific application and desired level of corrosion resistance. Hot-dipped galvanized steel pipes are typically used in demanding environments, while electro-galvanized steel pipes are suitable for less corrosive applications where cost-efficiency is important.

Q: How do steel pipes withstand high pressure and temperature?: Steel pipes are able to withstand high pressure and temperature due to their inherent properties and construction. Steel is known for its strength and durability, making it an ideal material for pipes used in demanding applications. Firstly, steel pipes are made from high-quality steel alloys that have been specifically designed to withstand extreme conditions. These alloys are chosen for their high tensile strength, which allows the pipes to withstand the internal pressure exerted by fluids or gases flowing through them. The steel used in these pipes is often alloyed with other elements such as chromium, molybdenum, or nickel to enhance its resistance to corrosion and high temperatures. Secondly, the construction of steel pipes plays a crucial role in their ability to withstand high pressure and temperature. Steel pipes are typically manufactured using a seamless or welded process. Seamless pipes are made by piercing a solid steel billet, resulting in a continuous and uniform pipe with no seams or joints. This seamless construction eliminates weak points and ensures that the pipe can handle high pressure without any risk of leakage. Welded pipes, on the other hand, are made by joining two or more pieces of steel together using a welding process. The welds are carefully inspected and tested to ensure their integrity and strength. Although welded pipes may have seams, they are equally capable of withstanding high pressure and temperature when manufactured to the appropriate standards. Additionally, steel pipes can be further reinforced to enhance their resistance to pressure and temperature. For instance, pipes used in extremely high-pressure applications may be thicker or have additional layers of protective coatings. These measures help to increase the strength and durability of the pipes, allowing them to withstand even higher pressures and temperatures. In summary, steel pipes are able to withstand high pressure and temperature due to the strength and durability of the steel alloys used in their construction. The seamless or welded construction of these pipes eliminates weak points and ensures their ability to handle extreme conditions. Additional reinforcement and protective coatings can be applied to further enhance their resistance to pressure and temperature.

Q: How are steel pipes used in underground drainage systems?: Steel pipes are commonly used in underground drainage systems due to their durability and strength. They are typically used to carry and transport wastewater and stormwater away from buildings and structures to a designated disposal area or treatment facility. The corrosion-resistant nature of steel pipes ensures a long lifespan, making them a reliable choice for underground drainage applications. Additionally, steel pipes can withstand high water pressure and are often used in larger diameter pipes to handle a higher volume of water flow.

Q: How are steel pipes marked for identification?: Steel pipes are typically marked for identification using various methods such as color coding, stenciling, engraving, or applying tags with relevant information such as size, grade, manufacturer, and specifications.

Q: What are the different types of steel pipe connections for fire sprinkler systems?: There are several types of steel pipe connections commonly used in fire sprinkler systems, including threaded connections, grooved connections, and welded connections. Threaded connections involve screwing the pipes together using tapered threads and are commonly used for smaller pipe sizes. Grooved connections use a coupling and gasket system to join the pipes, creating a secure and flexible connection. Welded connections involve permanently joining the pipes together using heat and are typically used for larger pipe sizes or in situations where maximum strength is required.

Q: What is the lifespan of a steel pipe?: The lifespan of a steel pipe can vary depending on various factors such as its quality, maintenance, and usage conditions. However, with proper care and maintenance, a well-made steel pipe can last for several decades or even more.

Send your message to us

*Email

*TEL

*Quantity

*Unit