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 are the different types of pipe coatings used for corrosion protection?: For corrosion protection, various pipe coatings are utilized to safeguard the exterior surface of pipes, ensuring their durability and integrity. Some commonly employed coatings for this purpose are as follows: 1. Fusion-Bonded Epoxy (FBE) Coatings: Renowned for their remarkable adhesion and resistance to chemicals, moisture, and abrasion, FBE coatings are extensively used. These coatings are applied by heating the pipe and subsequently spraying it with epoxy powder, which solidifies upon cooling, forming a protective layer. 2. Polyethylene (PE) Coatings: PE coatings are highly flexible and exhibit excellent resistance against impact and chemicals. Common application methods for these coatings include extrusion and wrapping, providing exceptional protection against water, soil, and other corrosive substances. 3. Polyurethane (PU) Coatings: PU coatings possess commendable resistance to chemicals, moisture, and mechanical damage. Spraying or brush coating methods are typically employed to apply these coatings, which find frequent usage in underground pipelines. 4. Coal-Tar Enamel Coatings: Coal-tar enamel coatings are suitable for safeguarding pipes exposed to highly corrosive environments like marine conditions or underground settings. Application techniques like hot or cold wrapping are commonly employed, granting exceptional resistance against water, acids, and alkalis. 5. Metallic Coatings: Metallic coatings, including zinc, aluminum, or zinc-aluminum alloys, are frequently adopted as sacrificial coatings to protect the underlying steel pipes. These coatings corrode preferentially, sacrificing themselves to shield the pipe from corrosion. 6. Asphalt Coatings: Asphalt coatings serve as robust barriers against moisture, chemicals, and soil. Typically applied using hot or cold wrapping methods, they are commonly utilized for underground pipelines. To determine the appropriate pipe coating for corrosion protection, it is crucial to consider factors such as the specific environment, temperature, and expected lifespan of the pipes.

Q:What are the different types of steel pipe tees?: There are several different types of steel pipe tees that are commonly used in various plumbing and piping applications. 1. Equal tee: This type of tee has all three branches of the same size, resulting in equal flow of fluid or gas through each branch. 2. Unequal tee: As the name suggests, an unequal tee has branches of different sizes. This allows for the merging or diversion of flows with different volumes or pressures. 3. Reducing tee: This type of tee is used when the branch size is smaller than the main pipe size. It allows for a reduction in size while maintaining the flow in the main line. 4. Barred tee: A barred tee is used in situations where a pig (a device used for cleaning and inspecting pipelines) needs to be inserted or removed from the line. It has a bar welded across one or two of the branches to create a bypass for the pig. 5. Lateral tee: A lateral tee has a 45-degree or 90-degree branch angle, allowing for the branch line to run perpendicular to the main line. It is commonly used in fire sprinkler systems or in situations where a change in direction is required. 6. Compression tee: This type of tee is used in gas or hydraulic systems, where the branches are connected using compression fittings instead of welding or threading. 7. Butt-weld tee: A butt-weld tee is used in high-pressure and high-temperature applications. It is welded to the main pipe using butt-welding techniques, ensuring a strong and leak-proof connection. These are some of the most common types of steel pipe tees used in various industries. The selection of the appropriate tee depends on the specific requirements of the project, including the size of the pipes, the flow rates, and the materials being transported.

Q:What is the role of steel pipes in the chemical manufacturing industry?: Steel pipes play a crucial role in the chemical manufacturing industry as they are widely used for transporting various chemicals, gases, and liquids. These pipes are highly durable, resistant to corrosion, and can withstand high temperatures and pressures, making them ideal for handling hazardous substances. Additionally, steel pipes ensure the integrity and safety of the chemical manufacturing process by preventing leaks, contamination, and loss of product.

Q:How does galvanization protect steel pipes from corrosion?: Galvanization protects steel pipes from corrosion by forming a protective zinc coating on the surface of the pipes. This zinc coating acts as a barrier between the steel and the surrounding environment, preventing moisture and corrosive elements from reaching the steel. Additionally, if the zinc coating is damaged, it sacrificially corrodes before the steel, further protecting the pipes from rust and corrosion.

Q:What is DN50 for welded pipe?: Refers to the use of welded steel pipe made of DN50 steel pipe, refers to the inside diameter is 50mm, the market of common DN50 pipe also refers to the 2 inch pipe, standard pipe: 3.5mm thickness, pipe diameter 60mm, the weight of 4.88kg/m theory. DN50 seamless steel pipe, commonly used in the market, has two specifications: 57mm, 60mm, and if no special instructions, 57mm is commonly used. The outer diameter of the welded pipe is only 60mm this specification.

Q:Can steel pipes be used for conveying chemicals?: Steel pipes are capable of conveying chemicals. Steel, being a robust and long-lasting material, can endure high pressure and temperature conditions. This makes it suitable for the transportation of diverse chemicals. Moreover, steel pipes possess exceptional resistance against corrosion, which is particularly crucial when handling corrosive substances. They find common usage in industries such as oil and gas, chemical processing, and water treatment, where the secure and efficient conveyance of chemicals is indispensable. However, it is essential to consider the specific requirements of the chemical being transported and ensure compatibility with the steel pipe. It may be necessary to select the appropriate material, including the utilization of corrosion-resistant coatings or linings, to prevent any adverse reactions between the chemicals and the steel pipe.

Q:The plastic pipe and steel pipe difference: In the plastic coated galvanized steel pipe inside the plastic coated manufacturing method. The thickness of the internal plastic is thin, which is equal to a plastic skin.

Q:How are steel pipes used in the food processing industry?: Steel pipes are commonly used in the food processing industry for various applications such as transporting liquids, gases, and solids. They are utilized for moving ingredients, process water, and cleaning solutions within the production line. Additionally, steel pipes are used for steam and heating systems, allowing for efficient cooking and sterilization processes. They possess excellent corrosion resistance and durability, ensuring food safety and maintaining hygienic standards in the industry.

Q:How do you calculate the flow velocity in a steel pipe?: The flow velocity in a steel pipe can be calculated using the equation: velocity = (flow rate) / (cross-sectional area of the pipe).

Q:Are steel pipes resistant to corrosion?: Yes, steel pipes are generally resistant to corrosion due to the protective layer of oxide that forms on their surface, but their resistance can vary depending on the specific grade of steel and the environment they are exposed to.

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