Stainless Steel Welded Tube ASTM A249 TP316L Bright Annealed Tube For Beverage Industry
ASTM A249/ASME SA249 TP316L is a stainless steel welded tube which is made from a 316L low-carbon austenitic alloy steel material due to its excellent corrosion resistance, particularly in high-temperature and chloride environments. The ASTM A249 TP316L Bright Annealed Stainless Steel Tube is an ideal choice for applications requiring a combination of high corrosion resistance, mechanical reliability, and surface cleanliness. The bright annealing process ensures a defect-free, reflective surface that maximizes the material’s inherent corrosion resistance, making it the standard specification for critical industries ranging from petrochemical heat exchangers to semiconductor manufacturing. YUHONG GROUP manufactures and provides ASTM A249 TP304/304L, TP316/316L, TP321/321H, TP310S, TP347H stainless steel welded tubes with excellent quality and competitive prices. Our tubes are widely applied in heat exchangers, boilers, evaporators, distillers, food and beverage industry, sugar refinery, and so on.
Surface Finish Options:
1. Bright Annealed (BA):
Process: Annealed in a controlled atmosphere furnace (hydrogen) after final cold work.
Characteristics: Smooth, reflective, scale-free finish with a bright metallic luster.
2. Electropolished (EP):
Process: An electrochemical process that removes a microscopic layer of material.
Characteristics: Mirror-like finish, reduces surface micro-roughness, enhances corrosion resistance, and improves cleanability. Ideal for semiconductor and pharmaceutical applications.
3. Mechanical Polished (MP):
Process: Polishing using abrasive belts or wheels (e.g., 180 grit, 320 grit, 400 grit).
Characteristics: Satin or mirror finish depending on grit level. Used for architectural or food-grade applications where aesthetics are required.
4. Pickled (AP - Acid Pickled):
Process: Annealed and then chemically cleaned to remove scale.
Characteristics: Matte, dull grey finish. Suitable for high-temperature industrial applications where aesthetics are not critical.
Mechanical Properties:
| Grade |
Tensile Strength, min, ksi
[MPa]
|
Yield Strength, min, ksi
[MPa]
|
Elongation in 2 in. or 50 mm,
min, %
|
| TP316L |
70[485] |
25[170] |
35 |
Chemical Composition(%):
| Grade |
C |
Mn |
P |
S |
Si |
Cr |
Ni |
Mo |
| TP316L |
0.030 |
2.00 |
0.045 |
0.030 |
1.00 |
16.0-18.0 |
10.0-15.0 |
2.00-3.00 |
Key Advantages and Features:
- Superior Corrosion Resistance: The addition of Molybdenum provides excellent resistance to pitting and crevice corrosion, particularly against chlorides, acids, and sulfates.
- Low Carbon Content: Prevents sensitization and intergranular corrosion, especially in welded conditions. No post-weld annealing is typically required for thin wall sections.
- Oxide-Free Surface (BA): chloride High Strength and Toughness: Maintains excellent mechanical properties across a wide temperature range (cryogenic to elevated temperatures).
- Weldability: Excellent weldability using standard fusion welding techniques. The low carbon content ensures stable welds without compromising corrosion resistance.
- Dimensional Accuracy: Cold drawing combined with bright annealing ensures tight tolerances suitable for precision instrumentation.
Different Applications:
A. Heat Exchangers & Condensers
- Shell and tube heat exchangers
- U-tube bundles for chemical processing
- Feedwater heaters in power generation
B. Ultra-High Purity & Semiconductor
- High-purity gas distribution systems
- Chemical vapor deposition equipment
- Pharmaceutical processing lines
C. Food, Beverage & Dairy (Sanitary)
- High-pressure sanitary lines
- Fermenters and storage tanks
D. Instrumentation & Hydraulics
- Control lines for pneumatic systems
- High-pressure hydraulic tubing
- Thermowells and sensor protection sheaths
E. Medical & Biotechnology
- Surgical instrument tubing
- Bio-reactor components
F. Marine & Chemical Processing
- Evaporators and crystallizers
- Offshore platform process piping
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