TIANJIN BO YI DA IMPORT AND EXPORT CO.,LTD is a modern production and exporting enterprise funded in 2014 with rich-full exporting experiences.
Our Product: ROOFING, BLACK PIPE, GALVANIZED PIPE, HOLLOW SECTION, GALVANIZED WIRE, STEEL COIL, etc have been exported to Africa: West Africa, East Africa, South east Asia: Philippines, Vietnam, Singapore, South America etc. Products are widely used in building and constructions.
We firmly believe in "Quality first, Service first" and to add value to our corporation. Looking forward win win business with global customers!

Products Description

why choose our products
Anti-corrosion coating seamless steel pipe refers to the use of paint to uniformly and densely coat the surface of the rust-removed steel pipe to isolate it from various corrosive media. It is one of the most basic methods for anti-corrosion of seamless pipes. There are many kinds of anti-corrosion coatings, and their properties and uses are different. Among them, the coating technology is to form a continuous covering layer of insulating material on the metal surface to insulate the metal and the electrolyte in direct contact with it. That is to set a high resistance so that the electrochemical reaction cannot occur normally. Seamless steel pipes means pipes with hollow sections and are used in large quantities for conveying fluids. When transporting oil, natural gas, gas, water and some solid materials, seamless pipes are often affected by external factors such as geological conditions and weather conditions and corrode. Therefore, it is necessary to carry out anti-corrosion of seamless pipes.
Anti-corrosion seamless steel pipe is a type of circular pipe that is hollow on the inside and contains no seams, joints, or welds on its exterior. This type of pipe is generally made of a type of steel, most commonly carbon steel or alloy steel. It may also be made of stainless-steel ingot. Manufactured using a process of hot rolling, cold rolling, or cold drawing, the result of its production, as mentioned, is a smooth, tough exterior. Seamless steel pipe is often considered the superior choice to an alternative like welded pipe because it can resist a greater degree of working pressure and is more resistant to damage and corrosion. It is, however, more expensive than welded pipe but can be worth the extra price for certain applications.
Products Specifications
Thickness | 2-30mm |
Length | 5.8-12m |
Standard | GB, DIN, JIS, ASTM |
Alloy or Not | Non-Alloy |
Grade | X52QO X56QO X60QO L360QO L390QO |
Applications | Fluid Pipe, Boiler Pipe, Drill Pipe, Hydraulic Pipe, Gas Pipe, OIL PIPE, Chemical Fertilizer Pipe, Structure Pipe, Other |
Shape | Round Section |
Type | Seamless Steel Pipe |
Products Advantages
Anti-corrosion seamless steel pipes have many advantages, including:
● Corrosion resistance: Seamless steel pipes are more resistant to corrosion than welded pipes. This can help prevent corrosion failures in HVAC systems and extend their service life.
● Strength: Seamless steel pipes are a better option for strength while being loaded.
● Cost-effective: Seamless black steel pipe is cost-effective and comes in many sizes.
● Scratch resistance: The outer wall coating of anti-corrosion steel pipes is 5 mm thick and resistant to scratches and bumps.
● Other advantages: Anti-corrosion steel pipes have a combination of the corrosion resistance of plastic and the mechanical strength of steel. They are also strong in adhesion, have high toughness, and are resistant to stress cracking and high impact.
Products Details

No Welded Seams: Eliminates weak points, providing higher burst pressure resistance
Uniform Material Structure: Homogeneous grain flow enhances mechanical performance
Better Stress Distribution: Ideal for high-pressure applications (hydraulic systems, boilers)
Leak-proof: No weld defects that could cause failure
Consistent Wall Thickness: Precision manufacturing ensures reliable performance
High Temperature Resistance: Maintains integrity under extreme thermal conditions (up to 750°F/400°C)
Smooth Inner Surface: Reduces scaling and improves fluid flow
Material Composition (%)
Element | ASTM A106 Gr.B | API 5L Gr.B | ASTM A335 P11 |
---|---|---|---|
C | ≤0.30 | ≤0.28 | 0.05-0.15 |
Mn | 0.29-1.06 | ≤1.20 | 0.30-0.60 |
Si | ≥0.10 | ≥0.10 | 0.50-1.00 |
Cr | ≤0.40 | ≤0.50 | 1.00-1.50 |
Mo | ≤0.15 | ≤0.15 | 0.44-0.65 |
Mechanical Properties
Grade | Tensile (MPa) | Yield (MPa) | Elongation (%) | Hardness (HB) |
---|---|---|---|---|
A106 Gr.B | ≥415 | ≥240 | ≥30 | ≤187 |
API 5L X42 | ≥415 | ≥290 | ≥21 | ≤225 |
A335 P11 | ≥415 | ≥205 | ≥30 | ≤179 |
Surface Treatment Options
Black/Bare: Mill scale surface
Varnished: Anti-rust oil coating
Galvanized: Hot-dip (80-100μm zinc)
3PE Coating: For corrosion protection
Packaging delivery
FAQ
Q1:What's your terms of payment?
the transportation fee is borne by buyer.
Our Service Processes
Phone/wechat/whatspp: 0086-15822491526
Pre-sales Consultancy
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Confirmation of order
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Production
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Multi-Channel Shipping
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Confirmation of recei
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After-sale Services
6
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