EN 10312, GB/T 19228.1, and ASTM A312 are three different standards for stainless steel pipes, used primarily for different regions or industries. Here's a detailed comparison among these standards:
Here is a detailed comparison table of the three standards-EN 10312, GB/T 19228.1, and ASTM A312-focusing on outside diameter (OD), wall thickness, and applications.
| Standard | Outside Diameter (OD) | Wall Thickness | Application |
|---|---|---|---|
| EN 10312 | 6 mm to 267 mm | 0.4 mm to 3.0 mm | Used mainly for conveying water and aqueous liquids, such as potable water, heating, and cooling systems. Suitable for low to medium pressure applications (e.g., PN6, PN10, PN16). |
| GB/T 19228.1 | 15 mm to 108 mm | 0.8 mm to 2.0 mm | Primarily used in domestic and commercial plumbing, water supply systems, heating systems, and fire protection systems. Designed for press-fitting systems with pressure classes up to PN16. |
| ASTM A312 | 3.2 mm (1/8 inch) to 762 mm (30 inches) | Schedule-based: ranges from Sch 5S (0.5 mm) to Sch XXS (about 20 mm, varies by size) | Used in high-temperature and high-pressure applications, including oil and gas, chemical, petrochemical, and power generation industries. Suitable for corrosive environments and high-stress conditions. |
Detailed Data for Each Standard
1. EN 10312: Stainless Steel Tubes for the Conveyance of Water and Other Aqueous Liquids
| OD (mm) | Wall Thickness (mm) | Application |
|---|---|---|
| 6 | 0.4 - 1.0 | Small diameter piping for potable water |
| 10 - 28 | 0.6 - 1.2 | Domestic plumbing systems |
| 35 - 54 | 1.0 - 1.5 | Heating and cooling systems |
| 76 - 108 | 1.2 - 2.0 | Large water conveyance systems |
| 133 - 267 | 1.5 - 3.0 | Industrial water and liquid transfer |
2. GB/T 19228.1: Stainless Steel Press-Fitting Systems for Water Supply
| OD (mm) | Wall Thickness (mm) | Application |
|---|---|---|
| 15 - 22 | 0.8 - 1.0 | Domestic water supply and small plumbing systems |
| 28 - 35 | 1.0 - 1.2 | Commercial plumbing and heating systems |
| 42 - 54 | 1.2 - 1.5 | Central heating systems, medium-sized water distribution |
| 76 - 108 | 1.5 - 2.0 | Fire protection, large-scale water supply systems |
3. ASTM A312: Standard Specification for Seamless, Welded, and Heavily Cold Worked Austenitic Stainless Steel Pipes
| OD (inches) | Schedule | Wall Thickness (mm) | Application |
|---|---|---|---|
| 1/8 - 3/8 | Sch 5S, Sch 10S | 0.5 - 1.6 mm | General piping, instrumentation, and low-pressure applications in chemical plants. |
| 1/2 - 4 | Sch 40, Sch 80 | 2.8 - 6.0 mm | Medium-pressure applications such as boiler pipes, power plant pipelines, and petrochemical lines. |
| 6 - 12 | Sch 40, Sch 80, Sch 160 | 3.9 - 11.1 mm | High-pressure applications, including refinery, petrochemical, and oil & gas pipelines. |
| 14 - 24 | Sch 40, Sch XXS | 7.9 - 19.1 mm | High-temperature, high-pressure systems in industrial and power generation plants. |
| 26 - 30 | Sch XXS | Up to 20 mm (varies by size) | Heavy-duty, high-stress applications in highly corrosive environments. |
Key Notes:
EN 10312 pipes are optimized for water distribution, potable water systems, and heating/cooling applications in buildings.
GB/T 19228.1 focuses on stainless steel press-fitting systems, typically for residential and commercial water supply systems, designed to operate under lower to medium pressure.
ASTM A312 pipes cover a wide range of applications, including extreme conditions with high temperatures and pressures, often in industrial, petrochemical, and power generation sectors.