ASTM A213 TP347 SS Heat Exchanger Tube
Grade: TP347
Manufacturing Process: Cold Drawn or Cold Rolled
Tube Type: Straight Tubes or U-Bent Tubes
Outside Diameter (OD): 1/2" (12.7 mm) to 5" (127 mm)
Schedule/Wall: BWG 14, 16, 18 or specified decimal thickness
Length: 6 meters, 12 meters, or customized Single/Double Random Length.
Heat Treatment: Solution Annealed at min. 1900°F (1040°C) followed by rapid quenching.
Surface Finish:Pickled & Annealed ,Bright Annealed
Ends: Plain Ends , Deburred
Sample：Available
Transport Package：Standard Sea-Worthy Packing
SS 347 Tube Supplier, ASTM A213 TP347 Tubes
As one of the leading manufacturers, suppliers, and exporters of ASTM A213 stainless steel seamless tubes, GNEE Stainless Steel provides high-quality A213 TP347 stainless steel heat exchanger tubes. Through solution annealing at 1060°C–1080°C, we guarantee a stable grain size number of 7 or coarser. The creep-rupture strength exceeds 60 MPa in a 700°C environment, providing a solid safety factor for high-pressure boiler operations.
We also strictly control the niobium-to-carbon ratio above 10×C, ensuring that the tubes pass the ASTM A262 Practice E corrosion test with a 100% success rate. Featuring excellent oxidation and corrosion resistance, particularly in high-temperature environments up to 1500°F, its performance outperforms grade 321 stainless steel, extending equipment service life by 25%.
Additionally, the Bright Annealing (BA) process performed on A213 TP347 stainless steel tubes in a pure hydrogen atmosphere ensures an inner surface roughness (Ra) of less than 0.8 μm. This mirror-grade cleanliness effectively prevents carbon deposition and reduces fluid pressure drop by approximately 8–10% compared to standard pickled tubes. The outer diameter (OD) tolerance of our supplied ASTM A213 TP347 stainless steel round tubes is ±0.08 mm (superior to the standard ±0.15 mm), and the wall thickness eccentricity is controlled within 5%. This ensures a 100% smooth fit with the tube sheet, reducing your welding preparation time by 15–20%.
For 347 SS U-tubes, we perform localized electrical resistance stress-relief heat treatment on the bent portion and the 300 mm straight tube segments. Hardness testing ensures that the maximum hardness in the transition zone does not exceed 190 HV, effectively neutralizing the risk of stress corrosion cracking (SCC) under high-temperature operating conditions.
Specification
ASTM A213 ASME SA-213 TP347 Stainless Steel Tubes Quick Details
Country/Region: China
Product Name：ASTM A213 ASME SA-213 TP347 Stainless Steel Tubes
FOB Price: US $4000-5000 / Ton | 1 Ton/Tons (Min. Order)
Specifications: 57mm*8mm; 60mm*9mm; 45mm*11mm, 51mm*12mm etc.
Payment：L/C or T/T
Package：Standard export package,suit for all kinds of transport, or as required
ASTM A213 SS 347 Seamless Tube Chemical Composition
| UNS No | Grade | C | Si | Mn | P | S | Cr | Mo | Ni | N | Other |
| S34700 | 347 | 0.08 | 0.75 | 2.00 | 0.045 | 0.030 | 17.00/19.00 | – | 9.00/13.00 | – | Cb:10xC1.00 |
ASTM A213 TP347 Stainless Steel Seamless Tube Mechanical Properties
| Element | TP 347 |
|---|---|
| Density | 8.0 g/cm3 |
| Melting Range | 1454 °C (2650 °F) |
| Tensile Stress | Psi – 75000 , MPa – 515 |
| Yield Stress (0.2%Offset) | Psi – 30000 , MPa – 205 |
| Elongation | 35 % |
| Hardness (Brinell) | 201 |
SS 347 Tube ASTM A213 Tolerances
| Specification | Allowable Outside Diameter Variation in mm | Allowable Wall Thickness Variation | Exact Length Tolerance in mm | Testing | ||||
| Nominal Diameter | Over | Under | %Over | %Under | Over | Under | ||
| ASTM-A213 TP347 Seamless Boiler Superheater and Heat Exchanger Tubes |
Under 25.4 | .1016 | .1016 | +20 | -0 | 3.175 | 0 | Flattening Test |
| 25.4-38.1 incl | .1524 | .1524 | +22 | -0 | 3.175 | 0 | Tension Test | |
| 38.1-50.8 excl | .2032 | .2032 | +22 | -0 | 3.176 | 0 | Flare Test | |
| 50.8-63.5 excl | .254 | .254 | +2 | -0 | 4.46 | 0 | Hardness Test | |
| 63.5-76.2 excl | .3478 | .3478 | +22 | -0 | 4.76 | 0 | 100% Hydrostatic test | |
| 76.2-101.6 incl | .381 | .381 | +22 | -0 | 4.76 | 0 | Refer to ASTM A-450 | |
Surface Condition
ASTM A213 ASME SA-213 TP347 Stainless steel tubes shall be pickled free of scale.
When bright annealing is used, pickling is not necessary.
Any special finish requirement shall be subject to agreement between the supplier and the purchaser.
Click to get free sample
What is the maximum service temperature of TP347 tube?
The maximum service temperature for a standard TP347 (and TP347H) stainless steel tube is 1650°F (899°C) for continuous service in oxidizing environments.However, for prolonged code applications (such as in boilers or pressure vessels under the ASME Boiler and Pressure Vessel Code), the recommended maximum continuous use temperature is typically limited to 1500°F (816°C) to maintain optimal mechanical and anti-sensitization properties.
What is the difference between TP347 and TP347H?
The primary difference between TP347 and TP347H is their carbon content. TP347 contains a maximum of 0.08% carbon, while TP347H (where "H" denotes high carbon) contains between 0.04% and 0.10% carbon. This higher carbon content grants TP347H superior creep resistance and high-temperature strength.
TP347 Stainless Steel Boiler Tube Application
TP347 seamless tubes are used in demanding environments where both corrosion resistance and high-temperature strength are required:
Power Generation Boilers: Superheater and reheater tubes, where steam temperatures can exceed 600°C (1112°F).
Heat Exchangers: In chemical processing, petrochemical, and oil & gas industries for handling corrosive process streams at elevated temperatures.
Fossil Fuel and Nuclear Power Plants: For critical components exposed to high-pressure steam.
ASTM A213 TP347 Tube Price Per Kg
ASTM A213 TP347 tube prices typically range from $4.00 to $6.50 per kg (or $4,000 to $6,500 per metric ton) for bulk orders. Retail, customized, or smaller domestic quantities can run between $6.00 and $9.00 per kg, depending on wall thickness, outer diameter (OD), and manufacturing volume.
Click to get TP347/347H FOB prices
Quality Control
We perform 100% handheld spectroscopic PMI testing on every tube, rather than relying on random sampling.
In addition to standard hydrostatic testing, our tubing undergoes 100% Eddy Current Testing (ECT) and Ultrasonic Testing (UT). We are capable of detecting internal defects as small as 5% of the wall thickness, ensuring zero-defect integrity under high-pressure boiler operating conditions.
hydrostatic test
347 SS Pipe PMI Test
high quality packaging
Our pipes are packed in fumigated wooden crates reinforced with steel frames, featuring internal separators to prevent contact and impact between pipes. We utilize high-strength, inset plastic end caps capable of withstanding 50kg impacts; these ensure the beveled pipe ends maintain perfect roundness, allowing for immediate welding upon arrival.
Each bundle is secured with dual high-strength nylon lifting straps to prevent surface scratches caused by wire ropes. Additionally, every pipe is laser-marked with a unique QR code linked to its digital Mill Test Certificate (MTC), enabling your on-site team to instantly verify heat numbers and test data via mobile phone.
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