ASTM A795, A53 and A135 pipe are all steel pipes produced in accordance with the standards of the American Society for Testing and Materials (ASTM International). These three types of pipes can all be suitable for firefighting pipes and can also be produced by electric resistance welding, but they are slightly different.
Electric-Resistance-Welding is a manufacturing process and technology that uses heating to join metal or other thermoplastic materials such as plastics. After the workpieces are combined, pressure is applied through electrodes and the resistance heat generated by current passing through the contact surface of the joint and adjacent areas is used for welding. Methods.
Each of these three steel pipe standards has unique characteristics. The main difference is that ASTM A135 steel pipe is produced using the resistance welding process only. In contrast, the ASTM A795 standard applies to both welded and seamless steel pipes. As for the ASTM A53 standard, it covers three different manufacturing technologies: continuous butt welding (Type F), resistance welding (Type E), and seamless steel pipe (Type S).
In addition, ASTM A53 standard welded steel pipe needs to be hydrostatically tested to ensure its integrity. The ASTM A795 and A135 standards provide alternatives, allowing non-destructive testing methods, such as eddy current testing or ultrasonic testing, to replace traditional hydrostatic testing.
Electric-Resistance-Welding is a manufacturing process and technology that uses heating to join metal or other thermoplastic materials such as plastics. After the workpieces are combined, pressure is applied through electrodes and the resistance heat generated by current passing through the contact surface of the joint and adjacent areas is used for welding. Methods.
Each of these three steel pipe standards has unique characteristics. The main difference is that ASTM A135 steel pipe is produced using the resistance welding process only. In contrast, the ASTM A795 standard applies to both welded and seamless steel pipes. As for the ASTM A53 standard, it covers three different manufacturing technologies: continuous butt welding (Type F), resistance welding (Type E), and seamless steel pipe (Type S).
In addition, ASTM A53 standard welded steel pipe needs to be hydrostatically tested to ensure its integrity. The ASTM A795 and A135 standards provide alternatives, allowing non-destructive testing methods, such as eddy current testing or ultrasonic testing, to replace traditional hydrostatic testing.
1.A795 Pipe
ASTM A795/A795M-21 is a standard specification for black and hot-dipped zinc-coated (galvanized) welded and seamless steel pipe for fire protection use.
2.A53 Pipe
ASTM A53/A53M-22 is a standard specification for pipe, steel, black and hot-dipped, zinc-coated, welded and seamless variations. This metal pipe is suitable for mechanical and pressure applications and can also be used for steam, water, gas and Common uses of air ducts.3.A135 Pipe
ASTM A135/A135M-21 is a standard specification for Electric-Resistance-Welded(ERW) steel pipe.4.ASTM A795 vs A53 Pipe
| Feature | ASTM A795 | ASTM A53 |
|---|---|---|
| Application | Fire sprinkler systems | General purpose (pressure piping, structural, mechanical) |
| Material | Black and hot-dipped galvanized steel | Steel (may or may not be coated) |
| Strength | Narrower range of grades | Wider range of grades (potentially higher strengths) |
| Corrosion Resistance | Typically hot-dip galvanized | May or may not be coated |
| Cost | Slightly more expensive (due to galvanizing) | Less expensive (uncoated) |
5.ASTM A795 vs A135 Pipe
| Feature | ASTM A795 | ASTM A135 |
|---|---|---|
| Application | Fire protection service | Fire protection service (common), other welded pipe applications (HVAC, light structural) |
| Material | Black and hot-dipped galvanized steel (seamless and welded) | Electric resistance welded (ERW) steel (usually not galvanized) |
| Strength | Wider range (depending on grade and seamless/welded) | Narrower range |
| Corrosion Resistance | Typically hot-dip galvanized | Usually black steel with zinc-rich primer (galvanized option available) |
| Availability | Less readily available | Widely available |
| Cost | More expensive | Less expensive |
