Seamless U Bend Heat Exchanger Tube for Chemical Petrochemical Oil Gas and Power Plants with Minimum Wall Thickness A213 TP317L
Seamless U Bend Heat Exchanger Tube for Chemical Petrochemical Oil Gas and Power Plants with Minimum Wall Thickness A213 TP317L
U bend tubes for heat exchangers applied mostly in Oil & Gas plants, Chemical & Petrochemical plants, Refineries, Power plants, Renewable energy plants.
Applications The common application fields are:
- Heat exchangers (condensers, evaporators, sea water desalinators)
- Chemical and petrochemical industries
- Food processing and refrigeration industries
Steel Grade:
| Ferrite | Austenite | Duplex | Super Duplex | Ni-Alloys | Titanium |
|
TP410 TP409 TP409S |
TP304/304L TP347 HFG TP347 |
S31803 S31500 S31254 253MA |
S32750 S32760 |
N06600 N06601 N06625 N08810 NO8811 |
Gr.2 |
Chemical Composition of 317 / 317L Tube
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | Fe |
| SS 317 | 0.08 max | 2.0 max | 1.0 max | 0.045 max | 0.030 max | 18.00 – 20.00 | 3.00 – 4.00 | 11.00 – 15.00 | 57.845 min |
| SS 317L | 0.035 max | 2.0 max | 1.0 max | 0.045 max | 0.030 max | 18.00 – 20.00 | 3.00 – 4.00 | 11.00 – 15.00 | 57.89 min |
he unique properties of TP317L make it the material of choice for specific, demanding industrial applications where other steels would fail prematurely .
Exceptional Chemical Resistance: The higher percentage of molybdenum (3-4%) is the key. It gives TP317L outstanding resistance to attack from sulfuric, phosphoric, and formic acids. For example, in boiling 10% sulfuric acid, TP317L corrodes at a rate of 298.28 mils per year (mmpy), while 316L corrodes at a much higher rate of 635.7 mmpy . This makes it ideal for chemical processing equipment .
Superior Performance in Chloride-Rich Environments: The combination of molybdenum and nitrogen in some variants provides a high "Pitting Resistance Equivalent" (PRE) number, making TP317L significantly more resistant to the pitting and crevice corrosion caused by chlorides (e.g., saltwater) . This is critical for applications in marine environments, pollution control (flue-gas desulfurization), and pulp and paper manufacturing .
Reliability in High-Temperature Service: TP317L offers higher creep, stress-to-rupture, and tensile strength at elevated temperatures compared to conventional stainless steels . It also resists scaling up to about 1650°F (899°C) . This reliability is essential for components in power generation, such as condensers, and in refinery operations .
U-Bend Tubes:
-TEMA RCB 2.31 Standard Of The Tubular Exchanger Manufacturers Association (9th Edition).
-ASTM A688/ASME SA688 Standard Specification For Welded Tubes Of Austenitic Corrosion Resistant
Steel Grade Designed For Feed Water Boilers.
-ASTM B163/ASME SA163 Standard Techinical Requirements For Tubes Of Nickel And Nickel Alloy For
Condensers And Heat Exchangers.
-Customer Specifications.
Bending Radius: From 1.5*OD(Outside Diameter) To 1500mm
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