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 is the maximum length of steel pipes available?: The maximum length of steel pipes available can vary depending on the specific manufacturer and supplier. However, in general, steel pipes can be found in lengths ranging from 18 feet to 40 feet or even longer.

Q:How to make the internal tooth of the steel pipe?: At present, in our country, 300MW or 600MW or more large capacity sub critical and supercritical thermal power boilers are designed or imported abroad. Membrane internal wall tubes are widely used in membrane water wall.

Q:How do steel pipes handle vibrations?: The effectiveness of handling vibrations is a well-known attribute of steel pipes. Their strong and rigid nature enables them to withstand various types of vibrations, including mechanical vibrations and seismic activities. The structural integrity and strength of steel pipes are responsible for their resilience. Steel pipes possess high tensile strength, which allows them to resist deformation or breakage when exposed to vibrations. They also exhibit resistance to fatigue, meaning they can endure repeated vibrations without suffering significant damage. This quality makes steel pipes ideal for applications involving constant or cyclic vibrations, such as in industrial settings or for fluid transportation through pipelines. Furthermore, steel pipes have the added advantage of being able to dampen vibrations due to their mass. The weight of the steel pipe aids in absorbing and dissipating the energy generated by vibrations, preventing excessive movement or oscillation. This damping effect contributes to the overall stability and durability of the pipe system. Various measures can be taken to further enhance the ability of steel pipes to handle vibrations. These measures may include the utilization of vibration isolators or dampers, which are devices designed to reduce the transmission of vibrations from the surrounding environment. Additionally, proper installation techniques and regular maintenance can help ensure that steel pipes continue to function optimally under conditions prone to vibrations. In conclusion, steel pipes possess the necessary attributes to effectively handle vibrations, including strength, resistance to fatigue, and the ability to dampen vibrations. Their robustness and durability make them a reliable choice for applications where vibrations are a concern, guaranteeing the safe and efficient transportation of fluids or materials.

Q:How are steel pipes protected against UV radiation?: Steel pipes are typically protected against UV radiation through the application of coatings or paints that contain UV inhibitors. These coatings act as a barrier between the steel surface and the harmful UV rays, preventing damage and degradation of the pipes over time. Additionally, some steel pipes may be treated with zinc or other metals, which offer inherent UV protection and enhance the overall durability of the pipes.

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, transportation of crude oil and natural gas, and for constructing pipelines and storage tanks. They provide strength, durability, and resistance to corrosion, making them ideal for these critical operations.

Q:What are the different methods of joining steel pipes for oil and gas pipelines?: There are several different methods of joining steel pipes for oil and gas pipelines, including welding, threading, and flange connections. Welding involves heating the ends of the pipes and fusing them together, creating a strong and durable joint. Threading is a process where the ends of the pipes are threaded and screwed together, providing a secure connection. Flange connections involve using flanges, which are flat, circular discs with holes in the center, to connect the pipes. The flanges are bolted together, creating a tight seal. These methods are commonly used in the construction of oil and gas pipelines to ensure reliable and leak-free connections.

Q:How are steel pipes used in the petrochemical industry?: Steel pipes are commonly used in the petrochemical industry for various purposes such as transporting and distributing fluids and gases, as well as providing structural support for equipment. They are particularly preferred due to their high strength, durability, and resistance to corrosion, making them suitable for handling harsh and corrosive substances.

Q:How do steel pipes compare to other types of piping materials?: Steel pipes are known for their exceptional strength, durability, and resistance to corrosion, making them superior to many other types of piping materials. They can withstand high pressure and temperature, making them suitable for a wide range of applications. Additionally, steel pipes are cost-effective, readily available, and easily recyclable, making them a preferred choice in various industries.

Q:How are steel pipes threaded for connection?: Steel pipes are threaded for connection using a threading machine that cuts grooves into the pipe's outer surface. The machine rotates the pipe while a die cuts the threads, creating a spiral pattern. This threading allows pipes to be securely connected by screwing them together, providing a tight and leak-free joint.

Q:Can steel pipes be used for scaffolding and support structures?: Yes, steel pipes can be used for scaffolding and support structures. Steel pipes are commonly used in construction due to their strength, durability, and ability to withstand heavy loads. They provide a stable and secure framework for scaffolding and support structures, ensuring the safety of workers and the stability of the construction project. Steel pipes are also versatile and can be easily assembled and disassembled, making them an ideal choice for temporary structures like scaffolding. Additionally, steel pipes are resistant to corrosion, making them suitable for outdoor applications and ensuring the longevity of the scaffolding and support structures.

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