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Utilizing 26 high-precision cold rolling mills and 6 cold drawing machines, we ensure dimensional accuracy and superior mechanical properties.
ASTM A213 TP317L Heat Exchanger Tube
High-Molybdenum Low-Carbon | UNS S31703 | Superior Pitting Resistance
ASME SA213 | TEMA Compliant | 100% ET TestedRelated Products
Introduction
ASTM A213 TP317L Heat Exchanger Tube extends the 316 family's molybdenum-driven corrosion resistance a step further, raising molybdenum content to 3.0-4.0% compared to 316L's 2.0-3.0%. This additional molybdenum meaningfully increases the pitting resistance equivalent number (PREN), giving TP317L a real advantage in applications where chloride-bearing condensates, bleach liquors, or flue gas scrubber solutions would otherwise attack standard 316L tube bundles prematurely. Carbon is held to 0.03% maximum, the same low-carbon philosophy applied across the '-L' grades, so field-welded tube-to-tubesheet joints remain resistant to sensitization and intergranular attack without requiring post-weld heat treatment.
As a heat exchanger tube, TP317L is manufactured to the tighter dimensional and surface-finish tolerances that shell-and-tube and U-tube bundle designs demand, since even small out-of-roundness or wall eccentricity affects tube-to-tubesheet rolling and expansion quality. Tubes are supplied seamless and fully annealed, with eddy current testing performed on essentially every length to screen for surface and near-surface defects that could compromise pressure boundary integrity in service. U-bending is available in-house, allowing single-pass bundle designs that reduce the number of tubesheet penetrations and associated leak paths compared to straight-tube designs.
Typical service includes flue gas desulfurization (FGD) reheaters and coolers, pulp and paper bleach plant heat exchangers, brackish and mildly saline cooling water systems, and chemical process condensers handling sulfuric or phosphoric acid mixtures at moderate concentration. Where chloride stress corrosion cracking risk is severe or acid concentrations exceed what 317L tolerates, engineers typically step up to 904L or a duplex grade; TP317L represents the practical mid-point between standard 316L economy and full super-austenitic cost.
Specifications
| Material Grade | TP317L (UNS S31703) |
| Standard | ASTM A213, ASME SA213 |
| Outer Diameter | 9.5mm - 76.2mm |
| Wall Thickness | 0.9mm - 7.0mm |
| Length | Up to 20000mm / U-Bend |
| Finish | Bright Annealed |
Chemical Composition
| C | Cr | Ni | Mo | Mn |
| ≤.03 | 18-20 | 11-15 | 3.0-4.0 | ≤2.0 |
High PREN TEMA Grade
Mechanical Strength
Comprehensive Info
| MOQ | 500kg |
| Lead Time | 25 - 35 Days |
| Testing | 100% Eddy Current & Hydro |
| Bundle Service | U-Bending Available |
Key Applications
Flue Gas Desulfurization FGD reheaters and gas-gas coolers
Pulp & Paper Bleach plant heat exchangers
Saline Cooling Water Brackish and coastal condenser tube
Advantages
Higher PREN
Extra molybdenum outperforms 316L against chloride pitting.
U-Bend Capable
Single-pass bundles reduce tubesheet leak paths.
100% ET Inspected
Eddy current testing screens every production length.
Cost/Performance Balance
Mid-point option between 316L economy and 904L cost.
About Jiangsu Jend Tube Co.,Ltd.
As China ASTM A213 TP317L Heat Exchanger Tube Manufacturers and Wholesale ASTM A213 TP317L Heat Exchanger Tube Factory, Established in 2011 and is a manufacturing enterprise with a complete manufacturing cycle from raw material selection to finished product delivery. The company currently has more than 100 employees, covers an area of 30015 square meters, and has a registered capital of 48 million yuan, annual production capacity of 3800 tons.
The company has passed ISO9001:2015 quality certification, domestic pressure vessel TS certification, and foreign pressure vessel PED certification. With rich experience and mature technology, we have been expanding our market internationally. At present, our products are exported to more than 50 countries and regions including Europe, America, Southeast Asia, and the Middle East.
The company adheres to different production norms and standards such as the American standard (ASTM), the European standard (EN), the German standard (DIN), the Japanese standard (JIS), the Russian standard (GOST), and the Chinese standard (GB).
Our company specializes in and customizes various specifications of Martensite TP410 (0Cr13, 1Cr13), Ferrite TP405 (1Cr13Al), TP430 (1Cr17), TP444 (0Cr18Mo2), TP439, TP409 (0Cr11Ti), It is also proficient in manufacturing Austenitic seamless stainless steel pipes of series such as TP304(L/H), TP316(L/H/Ti), TP310S, TP317, TP321(H) and TP347(H). Duplex such as S31803, S2205, S32750, S32304, and Nickel-based alloys Monel400, Monel600, Monel800, GH3030, 904L, Inconel 625, etc.
The company mainly produces seamless steel pipes with the following specifications: outer diameter: 3.18mm to 406.4mm, wall thickness: 0.3mm to 20mm, and the longest length is 25000mm. Additionally, it can customize seamless steel pipes with special materials and specifications according to customer requirements. The company attaches great importance to scientific innovation. The staff of the company vigorously develop technological research and development.
Jiangsu Jend Tube Co.,Ltd. will continuously accumulate professional knowledge and capabilities, striving to become a leader in the domestic market and even the world market. Strive to be the most reassuring pipe manufacturing enterprise for customers.
Precision Manufacturing and Process Optimization
We rely on precision equipment and optimized production technologies to achieve outstanding mechanical performance and consistent product quality.
Cold Rolling and Cold Drawing
Solution Heat Treatment
Natural gas solution treatment furnaces and BA solution treatment furnaces optimize the material's grain structure, enhancing corrosion resistance.
Precision Straightening and Polishing
10 straightening machines and 8 finishing polishing machines guarantee product surface smoothness and dimensional accuracy.
Automated Inspection and Quality Assurance
Real-time monitoring systems ensure the stable quality of every batch of products.
Usage Tips
Tubesheet Rolling
Confirm hardness and wall tolerance match your expander settings before bulk rolling to avoid over-thinning at the joint.
Chloride Threshold
For chloride levels beyond 317L's practical limit, evaluate 904L or a duplex tube before committing to bundle design.
Services
U-Bending
Custom radius bends for single-pass bundles.
Eddy Current Testing
100% inspection per ASTM E426/E571.
Tubesheet Fit-Up
Length and end-finish matched to your drawing.
Logistics
30% T/T Deposit / L/C at sight. Tubes bundled with plastic end caps and desiccant wrap, shipped in fumigated wooden crates for export.
Standards
ASME SA213
TEMA Class R/C/B
ASTM E213 UT
ISO 9001
Frequently Asked Questions
How does TP317L differ from TP316L?
TP317L contains 3.0-4.0% molybdenum versus 2.0-3.0% in TP316L, giving it a higher pitting resistance equivalent number and better performance in chloride-bearing process streams.
Can TP317L tube be U-bent for exchanger bundles?
Yes, in-house U-bending is available, allowing single-pass bundle designs that reduce the number of tubesheet penetrations.
What inspection is standard on heat exchanger tube?
Eddy current testing is performed on essentially every length, supplemented by hydrostatic testing per ASTM A213 requirements.
Is TP317L suitable for FGD service?
Yes, it is a common choice for flue gas desulfurization reheaters and coolers where condensed chlorides would attack 316L prematurely.
Does the low-carbon content affect strength?
Minimum mechanical properties for TP317L match TP317, since the carbon reduction targets weld corrosion resistance rather than strength.
When should I choose 904L instead of TP317L?
If process chloride concentration or acid strength exceeds 317L's practical service limits, 904L's higher alloy content provides a meaningful additional margin.
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