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ASTM A376 TP347H Seamless Austenitic Steel Pipe for Power Plant High Temperature Service​

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ASTM A376 TP347H Seamless Austenitic Steel Pipe for Power Plant High Temperature Service​

Brand Name : YUHONG

Model Number : ASTM A376 TP347H

Certification : ABS, GL, DNV, NK, PED, AD2000, GOST9941-81, CCS, ISO 9001-2008

Place of Origin : CHINA

MOQ : 500KGS

Price : Negotiable

Payment Terms : L/C, T/T

Supply Ability : 1500 tons per month

Delivery Time : 15-30days

Packaging Details : Plywooden Case /Iron Case

Standard : ASTM A376/ASME SA376

Material Grade​ : TP347H (UNS S34709)

Product Type : Stainless Steel Seamless Boiler Tube

Application​ : Power Plant Boiler Superheater/Reheater

Surface Treatment​ : Pickled & Passivated

NDT Methods​ : Eddy Current + Ultrasonic Test

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ASTM A376 TP347H Seamless Austenitic Steel Pipe for Power Plant High Temperature Service​

YUHONG GROUP​​ specializes in manufacturing ​​high-temperature resistant steel products​​ for critical power generation applications. With over 35 years of expertise in seamless steel pipe production, our ​​ASTM A376 TP347H Seamless Austenitic Steel Pipes​​ deliver exceptional performance in power plant boiler systems.


Chemical Composition of TP347H (UNS S34709)​

Element ​Requirement (%)​ ​Notes​
​Carbon (C)​ 0.04–0.10 Controlled for high-temperature stability
​Manganese (Mn)​ 2.00 max
​Phosphorus (P)​ 0.045 max
​Sulfur (S)​ 0.030 max
​Silicon (Si)​ 1.00 max
​Nickel (Ni)​ 9.0–13.0 Austenite stabilizer
​Chromium (Cr)​ 17.0–19.0 Oxidation resistance

​​Mechanical Properties of TP347H (UNS S34709)​

Property ​Requirement
​Grade​ TP347H
​UNS Designation​ S34709
​Tensile Strength, min​ 75 ksi [515 MPa]
​Yield Strength, min​ 30 ksi [205 MPa]
​Elongation in 2 in.., min​ 35% (Longitudinal)

TP347H Testing Requirements Summary​

Category​ Test Type​ Key Requirements​
Pressure/NDE​​ Hydrostatic Test Each pipe tested per A999/A999M (except NPS≥24 with NH marking)
NDE (UT/ET) Mandatory for all pipes (manufacturer's method selection)
Mechanical​​ Tensile Test 1 test per lot (≤100 pipes); 2 tests for >100 pipes
Flattening Test 5% of batch furnace pipes; min. 2 pipes for continuous process
Chemical​​ Product Analysis Required for each pipe length (individual rejection)
Special Tests​​ Transverse Tension Mandatory for NPS≥8 pipes (each end)
Etching Test Checks homogeneity per Method E381
Ultrasonic Test Full-length scanning with calibration notches
Intergranular Corrosion Practice A262 (as-shipped/sensitized condition)

​​ASTM A376 TP347H Seamless Austenitic Steel Pipe - Application Advantages​

1. Superior High-Temperature Performance for Power Plants​​

​​Excellent creep resistance​​ at temperatures up to 750°C (1382°F) - ideal for superheater and reheater applications
​​Outstanding oxidation resistance​​ ensures long-term stability in high-temperature flue gas environments

​​2. Enhanced Safety and Reliability in Critical Systems​​

​​Seamless construction​​ provides uniform wall thickness, eliminating weak points under extreme pressure conditions
​​Nb-stabilized composition​​ prevents intergranular corrosion in continuous high-temperature service

​​3. Cost-Efficient Power Generation Solution​​

​​Extended service life​​ reduces maintenance frequency and replacement costs
​​Optimized thermal efficiency​​ helps power plants maintain optimal operating parameters

​​4. Material Characteristics Supporting Power Applications​​

​​High temperature strength​​ maintains structural integrity under thermal cycling conditions
​​Corrosion resistance​​ suitable for various fuel types, including coal, gas, and biomass

​​5. YUHONG Quality Assurance​​

​​Full compliance​​ with ASTM A376/ASME SA376 specifications
​​Comprehensive testing,​​ including hydrostatic, ultrasonic, and eddy current examinations
​​Custom sizing​​ available from OD 1/2" to 24" with various schedule thicknesses


ASTM A376 TP347H Seamless Austenitic Steel Pipe for Power Plant High Temperature Service​


Product Tags:

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Quality ASTM A376 TP347H Seamless Austenitic Steel Pipe for Power Plant High Temperature Service​ for sale

ASTM A376 TP347H Seamless Austenitic Steel Pipe for Power Plant High Temperature Service​ Images

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