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304 stainless steel pipe wall thickness refers to the radial thickness of the pipe wall, typically measured in millimeters or inches. It varies by pipe type and application:
Ordinary pipes: 0.3mm–4mm
High-pressure pipes: 1.5mm–30mm
Transmission pipes: 1.5mm–20mm
These are general working ranges. In practice, the exact wall thickness for a given project is specified through the pipe's Schedule (SCH) designation, paired with its Nominal Pipe Size (NPS) — covered in the next section.
Common 304 Stainless Steel Pipe Wall Thickness
Rather than a single fixed number, 304 stainless steel pipe wall thickness follows the ASME B36.19M stainless pipe schedule system (SCH 5S / 10S / 40S / 80S). The table below lists commonly used sizes and their wall thickness across the four most-used schedules, drawn from our stainless steel pipe schedule chart.
| Pipe Size (NPS) | SCH 5S (mm) | SCH 10S (mm) | SCH 40S (mm) | SCH 80S (mm) |
| 1/2" | 1.65 | 2.11 | 2.77 | 3.73 |
| 1" | 1.65 | 2.77 | 2.87 | 4.55 |
| 2" | 1.65 | 2.77 | 3.91 | 5.54 |
| 4" | 2.11 | 3.05 | 6.02 | 8.56 |
| 6" | 2.77 | 3.40 | 7.11 | 10.97 |
| 8" | 2.77 | 3.76 | 8.18 | 12.70 |
Values converted from ASME B36.19M inch dimensions. For the full size range (up to NPS 12 and beyond) plus inside diameter and unit weight, see the stainless steel pipe dimensions and weight chart.
As the table shows, the same schedule does not mean the same wall thickness — a 2" SCH 40S pipe and an 8" SCH 40S pipe carry very different wall thicknesses. This is why any 304 stainless steel pipe wall thickness chart is organized by both NPS and schedule together, never by schedule alone.
Read a full guide：304 Stainless Steel Pipe Wall Thickness: Specifications & Chart
Article source: https://article-realm.com/article/Business/84585-304-Stainless-Steel-Pipe-Wall-Thickness-Specifications-and-Chart.html
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https://www.permanentsteel.com/Permanent Steel Manufacturing Co.,Ltd (PMC) have years of experience in manufacturing of carbon steel pipe, stainless steel tube, hollow section, pipe fittings.(Fluid Pipe/Boiler Tube/Fire Pipe/Line Pipe/Structure Tube) Please refer to: https://www.permanentsteel.com
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