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Wholesale Astm Carbon Steel Seamless Steel Pipe For Construction Seamless Tube Seamless Pipe Manufacturer, Suppliers
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Wholesale Astm Carbon Steel Seamless Steel Pipe For Construction Seamless Tube Seamless Pipe Manufacturer, Suppliers
Seamless steel pipe is a circular pipe having a hollow section and no seams around it. The seamless steel pipe is made of carbon steel, alloy steel, stainless steel ingot or solid tube blank, and then is made by hot rolling, cold rolling or cold drawing. Seamless pipes are considered superior to welded pipes as they are built using monolithic steel billets, with intrinsic mechanical strength, without seam welds.
The production processes of seamless steel pipes mainly include hot rolling and cold drawing (rolling).
1. Hot-Rolled Seamless Steel Pipes
Hot-rolled seamless steel pipes are made from round pipe billets, which are heated and pierced through a piercing machine, followed by multiple passes of rolling, cooling, and straightening, ultimately forming seamless steel pipes. The main advantages of hot rolling are the ability to produce large diameter and thick-walled seamless steel pipes, high production efficiency, and relatively low costs.
2. Cold-Drawn (Rolled) Seamless Steel Pipes
Cold-drawn (rolled) seamless steel pipes are formed through multiple cold drawing (rolling) processes at room temperature. The cold drawing (rolling) process can produce seamless steel pipes with high dimensional accuracy and smooth surface finish, and their mechanical properties and microstructure are more uniform. However, the production efficiency of cold-drawn (rolled) seamless steel pipes is lower, and the production costs are higher, making them suitable for applications requiring high precision and surface finish.
Product Parameters
Standard
API 5L: ASTM, BS, JIS, DIN
Steel Grade
API 5L Grade B/ASTM A 106B/A53; ASME B36, 10N-1996; GB8163-1999
O.D.
10MM-920MM
W.T.
2MM-40MM
Length
5m—12m or as per customer’s requirements
End protection
Plastic caps
Outside Coating
black painting, anti-corrosion oil, galvanized or as per required by customer
Packing
in bundles tied with steel stripes
Certificates
API 5L; ISO9001;2000
Production Capacity
Three factories with full production capacity, 200,000 tons per year
Delivery time
Within 30-60 days after signing the contract or as your requirement
Application
Seamless steel pipes for low and medium pressure boiler, high pressure boiler, and ship building, liquid service, petroleum cracking, chemical fertilizer equipment, drawing-oil-equipment and structure purposes.
Qualification
Independent import and export qualifications
Classification of Seamless Steel Pipes
Seamless steel pipes can be classified based on different standards and purposes.
1. Classification by Material
• Carbon Steel Seamless Steel Pipes: Primarily used for fluid transportation pipelines and structural components. They offer good mechanical properties and lower costs.
• Alloy Steel Seamless Steel Pipes: Mainly used under high-temperature and high-pressure conditions, suitable for petroleum and chemical industries.
• Stainless Steel Seamless Steel Pipes: Excellent corrosion resistance, widely used in food, pharmaceutical, and chemical fields.
2. Classification by Production Process
• Hot-Rolled: Suitable for large-diameter and thick-walled pipes used in mechanical parts manufacturing.
• Cold-Drawn: Suitable for small-diameter and thin-walled pipes used in precision machinery.
3. Classification by Application
• Structural: For general and mechanical structures.
• Fluid Transportation: For water, oil, gas, and other fluids.
• Boiler: For manufacturing superheaters and steam pipes in high-pressure boilers.
• Fertilizer Equipment: For high-pressure transmission pipelines.
Application Fields of Seamless Steel Pipes
Due to their excellent mechanical properties and corrosion resistance, seamless steel pipes are widely used in the following fields:
1. Oil and Gas Industry: Used in drilling, extraction, and refining. High strength and pressure resistance ensure safety in harsh environments.
2. Chemical and Power Industries: Used for high-temperature pipelines, heat exchangers, and chemical reactors.
3. Machinery Manufacturing: Ideal for key components such as bearings, gears, and drive shafts.
4. Construction and Infrastructure: Used for structural support in bridges, tunnels, and large buildings.
Frequently Asked Questions (FAQ)
Q1: What is the main difference between hot-rolled and cold-drawn seamless pipes?Hot-rolled pipes are produced at high temperatures, making them ideal for large diameters and thick walls at lower costs. Cold-drawn pipes are processed at room temperature, offering higher dimensional precision and a smoother surface finish for precision applications.
Q2: Which standards do your seamless steel pipes comply with?Our products meet several international standards, including API 5L, ASTM A106/A53, BS, JIS, and DIN, ensuring global compatibility and quality.
Q3: What materials are available for seamless steel pipes?We offer a wide range of materials, including carbon steel for general fluid transportation, alloy steel for high-temperature/pressure environments, and stainless steel for maximum corrosion resistance.
Q4: What size ranges do you provide for seamless steel pipes?We offer Outer Diameters (O.D.) ranging from 10MM to 920MM and Wall Thicknesses (W.T.) from 2MM to 40MM, with lengths customizable up to 12 meters.
Q5: How are the pipes protected during shipping?The pipes are typically packed in bundles tied with steel stripes. The ends are protected with plastic caps, and the exterior can be coated with black paint, anti-corrosion oil, or galvanization as per customer requirements.
Q6: What are the primary applications for these pipes?They are extensively used in boiler systems, shipbuilding, liquid service, petroleum cracking, chemical fertilizer equipment, and various structural engineering projects.
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