UNS S31803 Tubes are produced to provide high strength, corrosion resistance and durability in challenging industrial applications. These pipes possess a duplex microstructure consisting of about 22 percent chromium, 5-6 percent nickel, and 3 percent molybdenum. They possess double the yield strength of 316 stainless steel with good pitting, crevice, and stress corrosion cracking resistance due to chlorides. The OD range is from 6mm to 630mm and the thickness of the wall ranges from 0.3mm to 50mm, as per the requirements of the project. The high mechanical properties, dimension stability and durability are suitable for critical process systems. USA Piping Solution is one of the leading trusted S31803 Tubes Manufacturer and Supplier in the USA and provides precision engineered tubes with international quality standards and customer specifications.
Specifications of UNS S31803 Tubes
| Specification Parameter | Technical Details |
|---|---|
| Tube Size Range | 1/2" NB - 8" NB |
| Outer Diameter (OD) | 6.0 mm - 630 mm |
| Wall Thickness (WT) | 0.3 mm - 50 mm |
| Available Schedules | SCH 20, SCH 30, SCH 40, STD, SCH 80, XS, SCH 60, SCH 120, SCH 140, SCH 160, XXS |
| Length Options | Single Random, Double Random, and Custom Required Length |
| Standard Specifications | ASTM A789 / ASME SA789 |
| Manufacturing Types | Seamless / Fabricated |
Applications and Industrial Uses of UNS S31803 Tubes
- Heat Exchanger Tubing
- Seawater Cooling Systems
- Chemical Process Equipment
- Offshore Oil & Gas Platforms
- Desalination Plants
- Hydraulic & Instrumentation Systems
- Pulp & Paper Processing Plants
- Pressure Vessel & Boiler Tubing
Frequently Asked Questions
What is the difference between UNS S31803 and UNS S32205 tubes?
UNS S32205 is an improved version of UNS S31803 with tighter chemical composition limits for better corrosion resistance. It is commonly supplied as a replacement for UNS S31803.
What is the equivalent grade of UNS S31803 tubes?
The equivalent grade of UNS S31803 is EN 1.4462, which is widely used under European standards.
Can UNS S31803 tubes be used in seawater applications?
Yes. UNS S31803 tubes offer excellent resistance to pitting, crevice corrosion, and chloride attack, making them suitable for seawater and marine applications.
What is the maximum operating temperature of UNS S31803 tubes?
UNS S31803 tubes are generally recommended for continuous service up to 300 °C (572 °F). Above this temperature, the risk of embrittlement increases.
Can UNS S31803 tubes replace 316L stainless steel tubes?
Yes. UNS S31803 tubes can replace 316L stainless steel tubes in many applications where higher strength and better corrosion resistance are required.