ASTM A312 TP347 Seamless Steel Pipe
Material：Stainless Steel
Surface Treatment：Polished
Section Shape：Round
Od：1/8"-20"
Delivery Condition：Solution Annealed and Pickled
Pipe End：Plain End/Beveled End/Threaded End
Transport Package：Both Side with End Caps
ASTM A312 TP347 Stainless Steel Pipe Manufacturer
GNEE specializes in the production of high-quality ASTM A312 TP347 stainless steel pipes, with operations spanning more than 60 countries worldwide. Its key overseas markets include Southeast Asia, the Middle East, and Latin America. The facility frequently hosts clients from countries such as Vietnam, Bangladesh, and Russia for on-site visits to discuss the establishment of long-term partnerships.
Our factory's ASTM A312 TP347H stainless steel pipes can operate continuously and stably within 427–816 ℃, with a maximum oxidation resistance temperature of 800 ℃ in atmospheric environments. They feature a tensile strength of ≥515 MPa and a yield strength of ≥205 MPa, delivering excellent high‑temperature resistance and creep resistance. Meanwhile, TP347H stainless steel pipes contain niobium at Nb≥10×C%. Batches subjected to stabilization heat treatment show zero intergranular corrosion cracks in tests, boasting outstanding corrosion resistance for demanding applications such as boiler superheaters, catalytic reforming units and high‑temperature chemical pipelines.
Our seamless ASTM A312 TP347H stainless steel pipes are produced via hot piercing to eliminate weld seams and mitigate leakage risks at the source. The cold rolling process enables precise control over wall thickness and outer diameter, while solution annealing stabilizes the material's microstructure. These processes effectively boost creep resistance and reduce performance degradation during long‑term high‑temperature service.
ASTM A312 TP 347 Stainless Steel Seamless Pipe Value Added Service:
Polishing,Beveling,Honing/Turning,Heatreating & Annealing,Positive Material Identification (PMI),UT Testing,ect.
ASTM A312 TP347 Pickled Stainless Steel Pipe
ASTM A312 TP347 Stainless Steel Round Pipe
ASTM A312 TP347 Stainless Steel Seamless Pipe
For more product details or customization service information, please click the link below, and our professional staff will provide you with replies.
ASTM A312 TP 347 sS Pipe Specification
| Specifications | : | ASTM A312 |
| Size | : | 1/8″NB TO 30″NB IN |
| ERW 347 Pipes & Tubes | : | 1/2" NB - 24" NB |
| Schedule | : | SCH20, SCH30, SCH40, STD, SCH80, XS, SCH60, SCH80, SCH120, SCH140, SCH160, XXS |
| Specialized in | : | Large Diameter Size |
| Length | : | Single Random, Double Random & Cut Length. |
| End | : | Plain End, Beveled End, Treade |
ASME A312 TP347 Seamless Pipes Composition Analysis
| ASTM A312 | Mn | Si | C | Ni | P | S | Cr | Mo | N | |
| TP347 | min. | - | - | - | 9.0 | - | - | 17.0 | 2.00 | - |
| max. | 2.0 | 1.00 | 0.08 | 13.0 | 0.045 | 0.030 | 20.0 | 3.00 | - | |
Mechanical Properties of ASTM A312 TP 347 Stainless Steel Seamless Pipe
|
Elongation at break ( % ) |
<60 |
|
Hardness - Brinell |
160-190 |
|
Izod impact strength ( J.m-1 ) |
20-136 |
|
Modulus of elasticity ( GPa ) |
190-210 |
|
Tensile strength ( MPa ) |
520-1100 |
Physical Properties of ASTM A312 TP 347 Stainless Steel Seamless Pipe
|
Density ( g.cm-3 ) |
7.93 |
|
Melting point (°C ) |
1400-1425 |
Thermal Properties of ASTM A312 TP 347 Stainless Steel Seamless Pipe
|
Coefficient of thermal expansion ( x10-6 K-1 ) |
16-18 @ 20-100°C |
|
Maximum use temperature in air ( °C ) |
800 |
Dimensional tolerance
Outer diameter tolerance
| 10.3≤D≤48.3 | +0.4/−0.8 |
| 48.3 | ±0.8 |
| 114.3 | +1.6/−0.8 |
Wall thickness tolerance
| 10.3mm ≤ D ≤ 73.0mm | Entire section | +20% / -12.5% |
| 88.9mm ≤ D ≤ 457.2mm | t/D ≤ 5% | +22.5% / -12.5% |
| 88.9mm ≤ D ≤ 457.2mm | t/D > 5% | +15% / -12.5% |
Stainless Steel 347 Pipes Application
1.Petrochemical Industry
2.Chemical Industry
3.Oil and Gas Industry
4.Pulp & Paper Indusry
If you are planning a project, let me know:
Do you need seamless or welded pipe?
What are the required size, schedule, and length dimensions?
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Quality Control
We provide product quality reports, EN 10204 3.1 and EN 10204 3.2 Material Test Certificates (MTC), and third-party inspection reports, while also supporting on-site testing for outer diameter, chemical composition, and surface roughness.
Outer diameter measurement
roughness test
composition detection
To learn more about our quality control process, please click the link below to view our product inspection videos, testing procedures, and inspection reports.
High-quality product packaging
For steel pipe packaging, high‑density solid end caps or rubber protective caps are installed at both ends to tightly seal the pipe orifices. Afterwards, the pipes are wrapped with plastic films and secured by strapping or packed in laminated wooden crates, so as to meet seaworthiness requirements during transportation or special packaging demands specified by clients.
Customer Cases
GNEE exports batches of customized precision seamless pipes to the United Arab Emirates for fluid transmission pipelines of industrial projects in the Middle East.
Customer feedback: The outer diameter tolerance is steadily controlled within ±0.05–±0.1 mm. The anti‑rust wooden crate packaging remains intact upon arrival. Complete third‑party nondestructive testing reports are provided, and the client has placed a repeat order for pipes of the same specifications.
FAQ
1.Is 347 stainless steel magnetic?
Grade 347 stainless steel is non-magnetic in its standard annealed condition, but it can become slightly magnetic after cold working.
2.What is the difference between 321 and 347 stainless steel pipe?
Type 321 uses titanium stabilization, making it cost-effective for general high-heat use. Type 347 uses niobium, offering superior high-temperature strength, better oxidation resistance, and easier arc-welding behavior.
3.What are the applications of 347 stainless steel pipe?
TP347 stainless steel is suitable for applications requiring intermittent heating between 800ºF (427ºC) and 1650ºF (899ºC), as well as for aircraft collector rings and exhaust manifolds, expansion joints, and high-temperature chemical processing equipment.
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