seamless steel tubes for construction System 1

seamless steel tubes for construction

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Loading Port:: Shanghai

Payment Terms:: TT OR LC

Min Order Qty:: 2000 m.t.

Supply Capability:: 10000 m.t./month

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Product Description:

Standards：
GB，_r81 62 Chinese national standard
ASTM A53 Standard of American Society of Testing Materials
ASME SA53 Boiler and pressure vessel--c-Ojrde of ASME
Application：
Seamless steel tubes for manufacturing pipelines。vessels，equipment and mechanical structures
Models of major steeI tubes：
1 O，20，35、45，Q345，1 5CrMo，1 2Crl MoV,A53A，A53B，SA53A，SA53B, etc．

Diamensional tolerances:

Types of steel tubes	Outer diameter		Wall thickness
Cold-rolled tubes	Tube sizes(mm)	Tolerances(mm)	Tube sizes (mm)	Tolerances(mm)
	＞30～50	±0.3	≤30	±10％
	＞50～219	±0.8％	≤30	±10％
Hot-rolled tubes	＞219	±1.0％	＞20	±10％

Mechanical properties：

Standard codes	Models of steel tubes	Tensite strength（MPa）	Yield strength（MPa）	Elongation（％）
GB/T8162	10	≥335	≥205	≥24
	20	≥390	≥245	≥20
	35	≥510	≥305	≥17
	45	≥590	≥335	≥14
	Q345	≥490	≥325	≥21
	15CrMo	≥440	≥295	≥22
	12Cr1MoV	≥490	≥245	≥22
ASTM A53 ASME SA53	A	≥330	≥205	Check the table in ASTM A 53 Check the table in ASME SA53
ASTM A53 ASME SA53	B	≥415	≥240	Check the table in ASTM A 53 Check the table in ASME SA53

Chemical composition:

Standard codes	Models of steel tubes	Chemical compositions（％）
Standard codes	Models of steel tubes	C	Si	Mn	P	S	Cu	Ni	Mo	Cr	V
GB/T8162	10	0.07～0.14	0.17～0.37	0.35～0.65	≤0.035	≤0.035	≤0.25	≤0.25	/	≤0.15	/
	20	0.17～0.24	0.17～0.37	0.35～0.65	≤0.035	≤0.035	≤0.25	≤0.25	/	≤0.25	/
	35	0.32～0.40	0.17～0.37	0.50～0.80	≤0.035	≤0.035	≤0.25	≤0.25	/	≤0.25	/
	45	0.42～0.50	0.17～0.37	0.50～0.80	≤0.035	≤0.035	≤0.25	≤0.25	/	≤0.25	/
	Q345	0.12～0.20	0.20～0.55	1.20～1.60	≤0.035	≤0.035	≤0.25	≤0.25	/	≤0.25	/
	15CrMo	0.12～0.18	0.17～0.37	0.40～0.70	≤0.035	≤0.035	≤0.25	≤0.30	0.40～0.55	0.80～1.10	/
	12Cr1MoV	0.08～0.15	0.17～0.37	0.40～0.70	≤0.035	≤0.035	≤0.25	≤0.30	0.25～0.35	0.90～1.20	0.15～0.30
ASTMA53 ASMESA53	A	≤0.25	/	≤0.95	≤0.05	≤0.06	≤0.40	≤0.40	≤0.15	≤0.40	≤0.08
ASTMA53 ASMESA53	B	≤0.30	/	≤1.20	≤0.05	≤0.06	≤0.40	≤0.40	≤0.15	≤0.40	≤0.08

Q: Can steel pipes be used for stadium construction?: Certainly, stadium construction can utilize steel pipes. Steel pipes possess several benefits that render them suitable for this purpose. Primarily, steel pipes exhibit immense strength and durability, enabling them to withstand heavy loads and provide structural stability to large structures such as stadiums. Their high tensile strength ensures they can resist bending or breaking under pressure. Moreover, steel pipes possess resistance to corrosion, a crucial characteristic for outdoor structures like stadiums that are exposed to diverse weather conditions. This resistance to rust and other forms of degradation guarantees the stadium's longevity. Additionally, steel pipes are highly versatile and can be easily fabricated into various shapes and sizes, allowing for customized designs and efficient installation. Furthermore, in terms of cost-effectiveness, steel pipes prove advantageous in stadium construction. They can be produced in large quantities with ease, making them readily available and affordable. The simplicity of transportation and installation also contributes to their cost-effectiveness. Another advantage of employing steel pipes in stadium construction lies in their sustainability. Steel is a recyclable material, and utilizing steel pipes promotes environmental responsibility. The recyclability of steel reduces the demand for new materials and minimizes waste. To summarize, due to their strength, durability, resistance to corrosion, versatility, cost-effectiveness, and sustainability, steel pipes can indeed be utilized for stadium construction.

Q: Can steel pipes be coated for additional protection?: Yes, steel pipes can be coated with various materials to provide additional protection against corrosion, abrasion, and other environmental factors. Coatings such as epoxy, polyethylene, and zinc can be applied to enhance the durability and lifespan of steel pipes, making them suitable for diverse applications in different industries.

Q: How big is the seamless steel tube of DN50?: Domestic steel pipe diameter is generally divided into A series and B series, DN50 pipe diameter of 60mm and 57mm respectively, the wall thickness should be based on your design pressure, temperature, pipe material to calculate.

Q: How are steel pipes used in the construction of railways and transportation systems?: Steel pipes are commonly used in the construction of railways and transportation systems for various purposes. One major use of steel pipes in these applications is for the construction of bridges and tunnels. Steel pipes are often used as structural components in the construction of bridges, providing support and stability to the overall structure. In tunnels, steel pipes are used as ventilation shafts, allowing for the circulation of air and removal of fumes, thus ensuring the safety of passengers and workers. Additionally, steel pipes are used for the construction of railway tracks. They are used as supports for the tracks, providing a stable base for the trains to travel on. Steel pipes used in railway tracks are typically coated or galvanized to protect them from corrosion and ensure their longevity. Moreover, steel pipes are used for drainage systems in railway stations and transport hubs, ensuring proper water management and preventing flooding. Another important application of steel pipes in transportation systems is for the construction of signposts and streetlights. Steel pipes are often used as the main structural element in these structures, providing strength and durability. They can be easily fabricated and shaped to meet the specific design requirements, making them a popular choice for these applications. Overall, steel pipes play a crucial role in the construction of railways and transportation systems by providing structural support, ensuring proper ventilation, facilitating drainage, and serving as the main components in various structures. Their strength, durability, and versatility make them an ideal choice for these applications, contributing to the safe and efficient operation of transportation networks.

Q: How are steel pipes used in the wastewater treatment industry?: Steel pipes are commonly used in the wastewater treatment industry for various purposes, including the transportation of wastewater from one area to another, the distribution of treated water to different locations, and the construction of infrastructure such as pumping stations and treatment plants. Due to their durability, resistance to corrosion, and ability to withstand high pressure, steel pipes are essential components in the efficient and reliable operation of wastewater treatment systems.

Q: How do you protect steel pipes from external damage?: To protect steel pipes from external damage, several measures can be taken. 1. Coating: Applying a protective coating on the surface of the steel pipes can help prevent external damage. Common coating options include epoxy, polyethylene, and fusion bonded epoxy (FBE) coatings. These coatings act as a barrier between the pipes and the surrounding environment, shielding them from corrosion, abrasion, and other external factors. 2. Cathodic Protection: This method involves using a sacrificial anode or impressed current to protect the steel pipes from corrosion. By connecting a less noble metal to the pipes, it attracts the corrosive elements, sacrificing itself instead of the pipes. This process helps extend the lifespan of the pipes and prevents external damage. 3. Wrapping and Taping: Wrapping the steel pipes with materials such as polyethylene or polypropylene tapes provides an extra layer of protection. These tapes act as a barrier against moisture, chemicals, and physical impact, safeguarding the pipes from external damage. Additionally, heat shrink sleeves can be used to provide insulation and protection against corrosion. 4. Underground Installation: Proper installation of steel pipes underground is crucial to protect them from external damage. This includes ensuring suitable trench depth, backfilling with appropriate materials, and avoiding excessive bending or stress on the pipes during installation. Proper bedding and padding techniques also contribute to the pipes' protection from external factors. 5. Regular Inspection and Maintenance: Periodic inspection and maintenance are essential to detect any signs of external damage early on. This can involve visual inspections, non-destructive testing, or even utilizing advanced technologies like pipeline integrity management systems. Timely repairs and maintenance can help prevent further damage and extend the lifespan of the steel pipes. Overall, protecting steel pipes from external damage requires a combination of preventative measures, proper installation techniques, and regular maintenance. By implementing these strategies, the pipes can be safeguarded against corrosion, abrasion, impact, and other factors that may compromise their integrity.

Q: What are the different methods of pipe support for steel pipes?: Various methods exist for supporting steel pipes, each aimed at guaranteeing pipe stability, alignment, and protection. Some frequently employed techniques are as follows: 1. Pipe Hangers: These devices suspend or bear the weight of the pipe from above. Typically crafted from metal, they can be adjustable or fixed, allowing for easy installation and maintenance. Depending on the application, pipe hangers can take the form of clevis hangers, beam clamps, or pipe rollers. 2. Pipe Shoes: These supports attach directly to the underside of the pipe, providing a stable resting surface. Usually made from steel or other durable materials, pipe shoes prevent pipe movement, absorb vibrations, and distribute weight evenly. They find common use in applications involving high temperatures or requiring thermal expansion. 3. Pipe Clamps: These devices fasten pipes together or secure them to structures. Constructed primarily of metal, pipe clamps come in various sizes and designs to accommodate different pipe diameters and configurations. They provide support and prevent sagging or movement, particularly in areas with directional or elevation changes. 4. Pipe Racks: These structures are custom-designed to support multiple pipes in an organized and secure manner. Commonly found in industrial settings like refineries or power plants, pipe racks store or support large quantities of pipes. Typically made of steel, they can be tailored to suit different pipe sizes and layouts. 5. Pipe Guides: These devices facilitate pipe movement control, especially during thermal expansion or contraction. Fixed to the structure, pipe guides offer a sliding surface that accommodates longitudinal pipe movement. They are frequently utilized in applications involving temperature variations, such as steam or hot water systems. These represent just a few examples of the numerous methods available for supporting steel pipes. The choice of support method depends on factors such as pipe size, weight, temperature, and specific application requirements. Selecting the appropriate support method is crucial to ensure pipe longevity and integrity while preventing issues like sagging, misalignment, or failure.

Q: What's the difference between hot-rolled seamless steel tube and cold-rolled seamless steel tube?: Cold rolled seamless steel pipe (DIAL) in general, steel pipe for low and medium pressure boiler tube, high-pressure boiler steel pipe, alloy steel pipe, stainless steel pipe, oil cracking tube and other steel tube, including carbon thin-walled steel, alloy thin-walled steel, stainless steel, thin steel tube.

Q: Where is the difference between seamless steel pipe and welded pipe?: Seamless pipe pressure is higher, welded pipe is generally in 10 or so MPa, now welded pipe to do seamless processing.

Q: How are steel pipes used in the manufacturing of telecommunications infrastructure?: Steel pipes are commonly used in the manufacturing of telecommunications infrastructure for various purposes such as underground cable protection, overhead cable support, and antenna mounting. They provide durability, strength, and corrosion resistance, ensuring the longevity and reliability of the infrastructure. Additionally, steel pipes allow for easy installation and maintenance of telecommunications equipment, making them an essential component in the industry.

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