4 Inch SS Pipe
The 4 inch SS pipe achieves a perfect balance between flow capacity and structural stability.Kaysuns is committed to providing precision piping solutions that meet global standards.We supply 4 inch stainless steel pipes directly from the factory,eliminating markups from intermediaries.With over a decade of experience in manufacturing stainless steel pipes and fittings and international trade,we offer customized manufacturing solutions.
The standard specifications for 4 inch SS pipe are defined by ASTM A312 / ASTM SA312 for seamless,straight seam welded,and heavily cold-worked austenitic stainless steel pipe intended for high-temperature and generally corrosive environments. Meanwhile,ASME B36.19M specifies dimensional standards,including wall thicknesses such as SCH 10S,40S,and 80S.ASME B36.10M,on the other hand,serves as the dimensional standard for carbon steel.
- High Quality
- Corrosion Resistant
- High Toughness
- Food Grade
- Factory Direct Sales
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Dimensions of a 4 Inch SS Pipe
The actual outer diameter of a 4-inch stainless steel pipe is slightly larger than 4 inches.Specifically,the standard outer diameter of this pipe is 4.5 inches.However,the inner diameter varies depending on the “grade” or wall thickness you select.
Common wall thicknesses for this grade include: 10S grade for light-duty applications and 40S grade for standard pressure.For projects involving extreme pressure environments,80S grade may even be required.
Dimensions of a 4 Inch SS Pipe
| Pipe Schedule | Outside Diameter (inch) | Wall Thickness (inch) | Inside Diameter (inch) | Weight per Foot (lb) |
|---|---|---|---|---|
| SCH 10S | 4.5 | 0.120 | 4.260 | 5.61 |
| SCH 40S | 0.237 | 4.026 | 10.79 | |
| SCH 80S | 0.337 | 3.826 | 14.98 |
4 Inch SS Pipe Material Grades for Superior Performance
The performance of piping systems is largely dependent on the steel grade.We utilize multiple austenitic and duplex stainless steel grades to manufacture piping,addressing diverse corrosive environments.
- Grade 304/304L:
The most popular choice for general applications,offering excellent cost-effectiveness and reliable corrosion resistance. - Grade 316/316L:
Contains molybdenum to effectively prevent chloride pitting corrosion in pipelines.Recommended for marine environments or chemical plants. - Duplex 2205:
Twice the strength of standard stainless steel, making it ideal for high-pressure systems in the oil and gas industry.
Seamless vs. Welded 4 Inch SS Pipe
| Feature | Seamless 4 inch SS Pipe | Welded 4 inch SS Pipe |
|---|---|---|
| Pressure Limit | Higher (No seam) | Moderate |
| Surface Finish | Smooth And Uniform | Visible Weld Bead (Unless Polished) |
| Cost | More Expensive | More Affordable |
| Availability | Harder To Find in Long Lengths | Readily Available |
Manufacturing Excellence: Seamless vs. Welded
Seamless 4 inch stainless steel pipes are manufactured through an extrusion process,featuring no longitudinal seams.This construction is suitable for high-pressure,high-temperature applications where safety is paramount.
In contrast,welded pipes are produced from cold-rolled strip steel,offering superior wall thickness uniformity and greater cost-effectiveness for large-scale infrastructure projects.
Surface Finishes for 4 Inch SS Pipe
- Mill Finish (Standard):
Typically a 2B finish (lightly reflective,cold-rolled) or 2D (dull),providing maximum corrosion resistance for industrial applications. - #4 Brushed/Satin Finish:
A polished finish created with 120-180 grit abrasives,often used where the pipe is visible and a consistent,non-reflective,satin look is desired. - Sanitary/Polished Finish:
Polished OD and ID for food,beverage,or pharmaceutical applications,meeting high-purity standards. - Bright Annealed (BA):
Produced in a controlled atmosphere furnace for a shiny,reflective finish.
4 Inch SS Pipe Applications
- Industrial & Chemical Processing
- Food & Beverage Industry
- Oil & Gas Industry
- Water & Wastewater Treatment
- Construction & Structural
- Automotive & Marine
- HVAC & Venting
- Medical & Pharmaceutical
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- RM901 No.22 Tangjiaqiao Road Wenzhou China
- +86 577 8551 1171
- [email protected]
- https://www.kaysuns.com/
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