3-inch Seamless Pipe
OD: 88.9 mm / 3.5 Inch
WT: SCH 40, SCH 80, SCH 160, XS, XXS
Standard: ASTM A106 Gr.B, API 5L PSL1 Gr.B, ASTM A53 Gr.B
Our 3-inch seamless pipe is the ultimate choice for high-pressure, high-temperature, and heavy-duty industrial applications. With superior mechanical properties and seamless construction, our pipes deliver unmatched reliability and safety in oil and gas, energy, and construction projects. Get competitive factory pricing today!
Product information
| Item | Specification |
|---|---|
| Nominal Pipe Size (NPS) | 3 Inch |
| Outside Diameter (OD) | 88.9 mm / 3.5 Inch |
| Common Wall Thickness (Schedule) | SCH 40, SCH 80, SCH 160, XS, XXS |
| Common Material Standards | ASTM A106 Gr.B, API 5L PSL1 Gr.B, ASTM A53 Gr.B |
Technical Data
| Property | ASTM A106 Gr.B | API 5L PSL1 Gr.B |
|---|---|---|
| Yield Strength (min) | 240 MPa | 241 MPa |
| Tensile Strength (min) | 415 MPa | 414 MPa |
| Elongation (min) | As per the standard | As per the standard |
| Chemical Composition | C, Mn, P, S, Si, Cu, Ni, Cr, Mo, V, etc. (Compliant with standard) | C, Mn, P, S, etc. (Compliant with standard) |
| Delivery Condition | Hot-Rolled or Normalized | Hot-Rolled |
Common Material Standards
3-inch seamless pipes are manufactured to different material standards based on their intended applications:
For structural and mechanical purposes:
ASTM A53: The most versatile carbon steel pipe, available in seamless and welded types (Type S denotes seamless).
API 5L: Oil and gas transmission line pipe, available in PSL1 and PSL2 grades.
For high-pressure, high-temperature applications (boilers, heat exchangers):
ASTM A106: Seamless carbon steel pipe for high-temperature service, commonly used for boiler and superheater tubes.
ASTM A335: Seamless ferritic alloy steel pipes for high-temperature service (e.g., P11, P22).
For stainless steel corrosion-resistant environments:
ASTM A312: Seamless and welded austenitic stainless steel pipes (e.g., 304/304L, 316/316L).
FAQ
Q1: What is the actual outside diameter of a 3-inch seamless pipe?
A: The standard outside diameter for a 3-inch (NPS 3) seamless pipe is 88.9 millimeters or 3.5 inches.
Q2: What is the difference between SCH 40 and SCH 80?
A: SCH 80 has a thicker wall than SCH 40, giving it a higher pressure rating. However, it has a smaller inside diameter and is heavier. Please choose based on your system's design pressure.
Q3: Can you provide material certification?
A: Absolutely. We can provide a full EN 10204 3.1 Mill Test Certificate, which includes chemical analysis and mechanical property test results.
Q4: What is the Minimum Order Quantity (MOQ)?
A: We offer flexible order quantities. Typically, the 3-inch seamless pipe MOQ starts from 1 metric ton, depending on the specification and stock availability.
Production Process Characteristics
1. Hot Rolling Process: Suitable for producing large-diameter thick-walled pipes, where solid pipe billets are rolled into hollow rough tubes via a piercing machine.
2. Cold Drawing Process: Capable of producing high-precision thin-walled pipes with surface roughness below Ra0.8μm.
3. Quality Advantages: The seamless, monolithic structure enhances pressure resistance by over 30% compared to welded pipes.
Application of a 3-inch seamless pipe
1. Energy Transmission: Main pipelines for oil and natural gas, high-pressure lines for shale gas extraction.
2. Chemical Equipment: Reactor heat exchange tubes, corrosion-resistant medium transport pipelines.
3. Power Generation: Superheater tubes for power plant boilers, turbine condenser tubes.
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