SA213 TP347 SS Boiler Tube is a seamless, ferritic and austenitic alloy stainless steel boiler tube. It is used in superheaters and heat exchanger tubes.
It is a modified version of SA213 TP347 with the addition of higher carbon content and an increased amount of niobium. This modification improves the high-temperature strength and corrosion resistance of the steel.
SA213 TP347H is a coarse grain stainless steel. It is widely used for the superheater and reheater tube in USC (ultra-supercritical) coal boilers. It is also used in high temperature operation.
SA213 TP347 stainless steel boiler tubes are high-quality, seamless tubes designed for use in high-temperature boiler and heat-exchanger applications. They are known for their resistance to corrosion and their ability to withstand high temperatures, making them suitable for demanding industrial processes, particularly in power generation and petrochemical industries. These tubes are often used in applications where corrosion resistance and high-temperature strength are critical.
347H is the higher carbon version of 347 plate. Due to the additional carbon present in 347H plate, it is tougher and generally more durable than 347 plate. These grades of stainless steel plate is available in a wide range of sizes at Penn Stainless Products.
This grade of stainless steel has an elongation of 40%. On the Brinell hardness scale 347 and 347H stainless steel plate has hardness of 201 and on the Rockwell B scale, both 347 and 347H have a hardness of 95.
Both contain between 17.0% and 20.0% chromium, and no more than 2.0% manganese. They are made of between 9.0% and 13.0% nickel. 347 stainless steel plate contains at most 0.04% phosphorous while 347H stainless steel can only contain up to 0.03% phosphorous.
| Grade | UNS | Composition, % | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Design | C | Mn | P | S | Si | Cr | Ni | Mb | Ti | Nb | N | Cu | Ce | B | Al | |
| TP347 | S34700 | 0.08 | 2 | 0.045 | 0.03 | 1 | 17.0–19 | 9.0–13 | ... | ... | See Spec | . | . | |||
| TP347H | S34709 | 0.04 – 0.1 | 2 | 0.045 | 0.03 | 1 | 17.0–19 | 9.0–13 | ... | ... | See Spec | . | . | .. | ||
Positive Material Identification (PMI) testing for TP347H involves the analysis of the chemical composition of the material to verify its alloy content and ensure it meets the required specifications.
TP347H is a high-temperature stainless steel alloy often used in applications like boiler tubes and heat exchangers. PMI testing is crucial to confirm that the material is indeed TP347H and that it meets the necessary alloy composition standards.
| Grade | UNS | Heat Treat Type | Austenitizing/ Solutioning Temperature, min or range °F [°C] | Cooling Media | ASTM Grain Size No. B |
|---|---|---|---|---|---|
| Designation | |||||
| TP347 | S34700 | Solution treatment | 1900 °F [1040 °C] | water or another rapid cool | ... |
| TP347H | S34709 | Solution treatment | cold worked:2000 | water or another rapid cool | 7 |
| [1100] hot rolled: 1925 [1050]H |
| Grade | UNS | Tensile Strength, Min ksi [MPa] | Yield strength, min ksi [MPa] | Elongation in 2 in. or 50 mm, min, %A, B | Hardness, Max | |
|---|---|---|---|---|---|---|
| Designation | Brinell/Vickers | Rockwell | ||||
| TP347 | S34700 | 75 [515] | 30 [205] | 35 | 192HBW/200Hv | 90HB |
| TP347H | S34709 | 75 [515] | 30 [205] | 35 | 192HBW/200Hv | 90HB |
| Grade | UNS No | Euronorm | |
|---|---|---|---|
| No | |||
| 347H | S34709 | 1.4961 | |
| Allowable Outside Diameter Variation in mm | Allowable Wall Thickness Variation | Exact Length Tolerance in mm | Testing | ||||
|---|---|---|---|---|---|---|---|
| Nominal Diameter | Over | Under | %Over | %Under | Over | Under | |
| 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 | .347H8 | .347H8 | +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 |
Flattening tests shall be made on specimens from each end of one finished tube, not the one used for the flaring test, from each lot.
Flaring tests shall be made on specimens from each end of one finished tube, not the one used for the flattening test, from each lot.
Each TP347H Stainless Steel Seamless pipe shall be subjected to the nondestructive electric test or the hydrostatic test. The type of test to be used shall be at the manufacturer’s option unless otherwise specified in the purchase order.
347 and 316 stainless steel both fall into the 300-series family and are known for their stability. While 316 is a standard alloy that offers superior weldability, 347 offers superior corrosion resistance and mechanical strength.
Markings will adhere to prescribed specifications in A999/A999M. They shall include the NPS or OD and schedule number or average wall thickness, heat number, and NH (when hydro testing is not performed) and ET (when eddy-current testing is performed) or UT (when ultrasonic testing is performed). The marking shall also include the manufacturer’s private identifying mark, the marking requirement of section 12.3 on Hydrostatic or Nondestructive Electric Test, if applicable, and whether seamless (SML), welded (WLD), or heavily cold-worked (HCW). For Grades TP347 and TP347H Stainless Tubes, the marking shall also include the heat number and heat-treatment lot identification.
SA213 TP347 boiler tubes can withstand temperatures up to 1500°C (2732°F).
Yes, it is suitable for welding, and proper procedures should be followed to maintain its corrosion resistance.
They are commonly used in power generation, petrochemical, chemical processing, and aerospace industries.
SA213 TP347 offers a unique balance of high-temperature strength and corrosion resistance, making it suitable for specific boiler applications.
They are typically available in seamless form, ensuring uniformity and reliability.
Ceramic lined pipe is made through self-propagating high-temperature synthesis (SHS) technique.
Cast basalt lined steel pipe is composed by lined with cast basalt pipe, outside steel pipe and cement mortar filling between the two layers.
Ceramic tile lined pipes have very uniform coating of specially formulated ceramic material that is affixed to the inner of the pipe.
The material of the rare earth alloy wear-resistant pipe is ZG40CrMnMoNiSiRe, which is also the grade of rare earth alloy steel.
Tubes Erosion Shields are used to protect boiler tubing from the highly erosive effects of high temperatures and pressures thereby greatly extending tube life.
The ASTM A213 T91 seamless tubes are primarily used for boiler, superheater, and heat-exchanger.
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