Hot rolled black seamless steel tube Gr.B

Hot rolled black seamless steel tube Gr.B

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

Seamless Carbon And Alloy Steel Mechanical Tubing

Hot-rolled seamless steel tubes for hydraulic pillar service

ERW Welded Pipes

API 5L Seamless line Pipe J55

Seamless Steel Alloy Pipe with Factory Price

Rectangular steel tube from cnbm okorder.com

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

Galvanized Pipe America Standard A53 200g Hot Dipped or 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?: Generally speaking, the diameter of the pipe can be divided into outer diameter, inner diameter and nominal diameter. Tubes are made of seamless steel tubes. The outer diameter of the tubes is indicated by the letter D, followed by additional outer diameter dimensions and wall thicknesses such as seamless steel tubes with an outer diameter of 108.

Q: How do you determine the required wall thickness for steel pipes?: The determination of the necessary wall thickness for steel pipes involves the consideration of multiple factors and calculations. One of the main factors to be taken into account is the pressure to which the pipe will be exposed. As the pressure increases, a thicker wall is required to guarantee that the pipe can endure the internal forces. The material strength of the steel used for the pipe is also a significant factor. Different steel grades possess varying tensile strengths, which directly impact the required wall thickness. Tensile strength refers to the maximum stress a material can withstand before failing, making it crucial to select a steel grade capable of withstanding the expected pressure. Furthermore, the pipe's diameter is influential in determining the necessary wall thickness. Pipes with larger diameters typically necessitate thicker walls to maintain their structural integrity and prevent deformation under pressure. Engineers employ industry standards and formulas to calculate the required wall thickness. The American Society of Mechanical Engineers (ASME) B31 code is the most widely used standard, offering guidelines for designing pressure piping systems. The ASME code integrates safety margins, material properties, and pressure ratings to determine the appropriate wall thickness. Other factors, such as temperature, corrosion, and external loads, can also influence the necessary wall thickness. For instance, applications involving high temperatures may require thicker walls to prevent buckling or softening of the pipe. In conclusion, the determination of the required wall thickness for steel pipes involves the consideration of pressure, material strength, diameter, temperature, and other external forces. Engineers rely on industry standards and calculations to ensure the pipe's ability to safely withstand the intended operating conditions.

Q: Can steel pipes be used for underground stormwater systems?: Yes, steel pipes can be used for underground stormwater systems. Steel pipes are known for their durability and strength, making them suitable for withstanding the pressure and weight of underground stormwater systems. Additionally, steel pipes have a high resistance to corrosion, which is important when dealing with stormwater that may contain various contaminants. However, it is important to properly coat and protect the steel pipes to prevent any potential corrosion or damage over time. Regular maintenance and inspections should also be carried out to ensure the integrity of the steel pipes and the overall performance of the underground stormwater system.

Q: How are steel pipes used in the manufacturing of scaffolding?: Steel pipes are commonly used in the manufacturing of scaffolding as they provide structural support and stability. These pipes are used to create the framework of the scaffolding structure, allowing workers to safely access and work at heights. The steel pipes are connected and secured together using couplers, providing a strong and reliable base for the scaffolding system.

Q: What are the industries that commonly use steel pipes?: Some of the industries that commonly use steel pipes include oil and gas, construction, manufacturing, automotive, infrastructure, water treatment, and plumbing.

Q: How are steel pipes used in power plants?: Steel pipes are extensively used in power plants for various applications. One of the primary uses of steel pipes in power plants is for transporting fluids and gases. These pipes are used to carry water, steam, and fuel (such as oil or gas) throughout the power plant. The high strength and durability of steel make it an ideal material for these pipes, as they can withstand high pressure and temperature conditions. Steel pipes are also used in power plant boilers. They form an integral part of the boiler system, where they carry hot gases and steam. These pipes are designed to withstand extreme heat and pressure, ensuring the safe and efficient operation of the boiler. Additionally, steel pipes are used in the cooling systems of power plants. Water is circulated through these pipes to cool down the equipment, such as turbines and condensers. The pipes are designed to withstand corrosion from the cooling water and maintain the required flow rate and pressure. Furthermore, steel pipes are used in the construction of power plant structures. They are used for the fabrication of support structures, such as frames, platforms, and walkways. Steel pipes provide excellent structural integrity and can withstand heavy loads, making them suitable for such applications. In summary, steel pipes play a vital role in power plants by transporting fluids and gases, serving as a part of the boiler system, facilitating cooling processes, and providing structural support. Their strength, durability, and resistance to extreme conditions make them an essential component in the operation of power plants.

Q: Can steel pipes be used for structural supports in buildings?: Yes, steel pipes can be used for structural supports in buildings. Steel pipes are known for their strength, durability, and ability to withstand heavy loads. They have high tensile strength, which means they can withstand large amounts of tension and compression without breaking or deforming. This makes them ideal for structural applications in buildings where strong and stable supports are required. Steel pipes can be used for various purposes such as columns, beams, trusses, and even as the main support for the entire building. They are also versatile and can be easily fabricated and customized to fit specific design requirements. Additionally, steel pipes are resistant to fire, corrosion, and pests, making them a reliable choice for long-term structural support in buildings.

Q: What are the factors to consider when selecting steel pipes for a specific application?: When selecting steel pipes for a specific application, several factors need to be considered. The key factors include the required strength and durability, corrosion resistance, temperature and pressure requirements, size and dimensions, cost considerations, and compatibility with other materials or systems. Additionally, factors such as the intended environment, installation requirements, and regulatory compliance should also be taken into account to ensure the optimal selection of steel pipes for the particular application.

Q: Can steel pipes be used for bridge piling?: Yes, steel pipes can be used for bridge piling. Steel pipes provide several advantages for bridge piling, such as high strength, durability, and resistance to corrosion. They can be driven deep into the ground to provide a stable foundation for the bridge structure, making them a suitable choice for bridge piling applications.

Q: Is the diameter of the steel tube indicated by the outer diameter by the wall thickness or by the inside diameter by the wall thickness?: Seamless steel pipe specifications are: outer diameter, wall thickness, material. Three of these reflect its main features.Welding pipe specifications are: nominal diameter (internal diameter), galvanized or non plated

Send your message to us

*Email

*TEL

*Quantity

*Unit