Cold draw black seamless steel pipe made in China

Cold draw black seamless steel pipe made in China

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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 are steel pipes sized and classified?: Steel pipes are sized and classified based on their outer diameter, wall thickness, and length. The sizing is done using standard measurements such as nominal pipe size (NPS) or nominal diameter (DN). Classification is determined by factors such as the pipe's pressure rating, material composition, and intended use. This helps ensure compatibility and proper installation in various applications such as plumbing, construction, and industrial processes.

Q:Seamless steel pipe and welded pipe what is the difference?: Identification method: see the inside of the pipe, because the external, will deal with the welded pipe is inside a gap, you can see some, some, is not easy to see, you can slowly by hand touch, or see the specifications are relatively thin, welded pipe

Q:How are steel pipes used in industrial manufacturing processes?: Steel pipes are commonly used in industrial manufacturing processes for various purposes such as transporting fluids, gases, and solids, providing structural support, and facilitating heat transfer. They are used in industries like oil and gas, construction, automotive, and manufacturing, where they are utilized for plumbing systems, conveyance of materials, and as a durable and reliable medium for handling high-pressure and high-temperature applications.

Q:Theoretical weight of 25*25*1.5 square steel tubes: The theoretical weight of 25*25*1.5 square steel tubes is 1.075kg/m.

Q:How do steel pipes handle seismic expansion joints?: Steel pipes handle seismic expansion joints by incorporating flexible joints or bellows in the pipeline system. These flexible joints are designed to absorb and accommodate the movement caused by seismic activity, allowing the steel pipes to expand and contract without causing damage or failure to the overall pipeline system.

Q:What are the factors to consider when selecting pipe materials for corrosive environments?: When selecting pipe materials for corrosive environments, there are several factors to consider. Firstly, the chemical composition and concentration of the corrosive substances must be evaluated, as different materials have varying resistance to specific chemicals. The temperature and pressure conditions in the environment also play a crucial role in material selection, as some materials may degrade or become brittle under extreme conditions. Additionally, the pipe's mechanical properties, such as strength and flexibility, should be assessed to ensure it can withstand the corrosive environment. The cost and availability of the chosen material, as well as its compatibility with other components in the system, should also be taken into account. Overall, a comprehensive understanding of the corrosive environment and thorough research on material properties are essential for selecting the most suitable pipe material.

Q:What are the common applications of steel pipes in the oil and gas industry?: Steel pipes are commonly used in the oil and gas industry for various applications such as drilling, production, transportation, and distribution of oil and gas. They are utilized for casing and tubing in oil wells, conveying fluids in pipelines, and supporting infrastructure for refineries and processing plants. Additionally, steel pipes are crucial for offshore drilling operations and are employed in the construction of platforms and subsea pipelines.

Q:What are the different types of steel pipe coatings?: There are several different types of steel pipe coatings, including epoxy coatings, polyethylene coatings, zinc coatings, and galvanized coatings. These coatings are applied to steel pipes to protect them from corrosion and extend their lifespan.

Q:What are the common methods for cleaning the inner surface of steel pipes?: Cleaning the inner surface of steel pipes can be done using different methods. Some commonly used methods include: 1. Mechanical Cleaning: Debris, rust, or scale on the inner surface of the steel pipe can be physically removed using mechanical tools like wire brushes, scrapers, or abrasive pads. This method is effective for removing loose or loosely adhered contaminants. 2. Chemical Cleaning: Stubborn deposits, rust, or scale can be dissolved or loosened using acidic or alkaline solutions. These solutions are circulated through the pipe for a specific period, allowing the chemical to react and break down the contaminants. Chemical cleaning is used when mechanical cleaning is not enough. 3. High-Pressure Water Jetting: High-pressure water is directed through a nozzle into the steel pipe to remove debris, rust, or scale from the inner surface. The force of the water jet dislodges and flushes out the contaminants. This method is efficient for cleaning pipes with complex geometries or hard-to-reach areas. 4. Shot Blasting: High-speed abrasive particles are propelled against the inner surface of the steel pipe to remove rust, scale, or other contaminants. Shot blasting is commonly used for larger pipes or pipes with heavy deposits. It provides a thorough and uniform cleaning by removing the surface layer of the steel along with the contaminants. 5. Ultrasonic Cleaning: High-frequency sound waves are used to create microscopic bubbles in a cleaning solution. These bubbles implode upon contact with the inner surface of the steel pipe, effectively loosening and removing contaminants. Ultrasonic cleaning is particularly effective for cleaning small-diameter pipes or pipes with intricate details. It's important to consider factors such as the type and extent of contamination, pipe size and geometry, and desired level of cleanliness when choosing a cleaning method. Safety measures should always be taken to protect workers and maintain the integrity of the steel pipes.

Q:What are the safety regulations for working with steel pipes?: The safety regulations for working with steel pipes vary depending on the specific tasks involved, but some common regulations include wearing appropriate personal protective equipment (PPE) such as gloves, safety glasses, and steel-toed boots, ensuring proper ventilation in enclosed spaces, following proper lifting techniques to prevent back injuries, implementing proper fall protection measures when working at heights, and using caution when handling tools and equipment to prevent accidents and injuries. It is important to consult the relevant guidelines and regulations specific to your jurisdiction and industry to ensure compliance and promote a safe working environment.

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