Zhejiang Yuhao Stainless Steel Co., Ltd
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Stainless Steel Seamless Pipe, ASTM A312 / ASME SA312 TP321H 100% ET / UT /HT
►Products Description
The Stainless Steel Seamless Pipe (ASTM A312 / ASME SA312 TP321H) is engineered for extreme industrial applications requiring superior corrosion resistance and high-temperature stability. Manufactured from TP321H austenitic stainless steel with titanium stabilization, it prevents carbide precipitation and ensures exceptional resistance to intergranular corrosion. Compliant with ASTM A312/ASME SA312 standards, the pipe undergoes 100% Eddy Current Testing (ET), Ultrasonic Testing (UT), and Heat Treatment (HT) to guarantee defect-free integrity, precise dimensional accuracy, and optimized mechanical properties. Ideal for chemical processing, power plants, and high-temperature oil & gas systems, it delivers unmatched durability, longevity, and reliability in harsh environments.
►Products Size
| STAINLESS STEEL(KS/JIS) | ||||||||
| A | O.D | SCH 5S | SCH 10S | SCH 20S | SCH 40 | SCH 80 | SCH 120 | SCH 160 |
| 6A | 10.5 | 1 | 1.2 | 1.5 | 1.7 | 2.4 | - | - |
| 8A | 13.8 | 1.2 | 1.65 | 2 | 2.2 | 3 | - | - |
| 10A | 17.3 | 1.2 | 1.65 | 2 | 2.3 | 3.2 | - | - |
| 15A | 21.7 | 1.65 | 2.1 | 2.5 | 2.8 | 3.7 | - | 4.7 |
| 20A | 27.2 | 1.65 | 2.1 | 2.5 | 2.9 | 3.9 | - | 5.5 |
| 25A | 34 | 1.65 | 2.8 | 3 | 3.4 | 4.5 | - | 6.4 |
| 32A | 42.7 | 1.65 | 2.8 | 3 | 3.6 | 4.9 | - | 6.4 |
| 40A | 48.6 | 1.65 | 2.8 | 3 | 3.7 | 5.1 | - | 7.1 |
| 50A | 60.5 | 1.65 | 2.8 | 3.5 | 3.9 | 5.5 | - | 8.7 |
| 65A | 76.3 | 2.1 | 3 | 3.5 | 5.2 | 7 | - | 9.5 |
| 80A | 89.1 | 2.1 | 3 | 4 | 5.5 | 7.6 | - | 11.1 |
| 90A | 101.6 | 2.1 | 3 | 4 | 5.7 | 8.1 | - | 12.7 |
| 100A | 114.3 | 2.1 | 3 | 4 | 6 | 8.6 | 11.1 | 13.5 |
| 125A | 139.8 | 2.8 | 3.4 | 5 | 6.6 | 9.5 | 12.7 | 15.9 |
| 150A | 165.2 | 2.8 | 3.4 | 5 | 7.1 | 11 | 14.3 | 18.2 |
| 200A | 216.3 | 2.8 | 4 | 6.5 | 8.2 | 12.7 | 18.2 | 23 |
| 250A | 267.4 | 3.4 | 4 | 6.5 | 9.3 | 15.1 | 21.4 | 28.6 |
| 300A | 318.5 | 4 | 4.5 | 6.5 | 10.3 | 17.4 | 25.4 | 33.3 |
| 350A | 355.6 | - | - | - | 11.1 | 19 | 27.8 | 35.7 |
| 400A | 406.4 | - | - | - | 12.7 | 21.4 | 30.9 | 40.5 |
| 450A | 457.2 | - | - | - | 14.3 | 23.8 | 34.9 | 45.2 |
| 500A | 508 | - | - | - | 15.1 | 26.2 | 38.1 | 50 |
| 550A | 558.8 | - | - | - | 15.9 | 28.6 | 41.3 | 54 |
| 600A | 609.6 | - | - | - | 17.5 | 31 | 46 | 59.5 |
| 650A | 660.4 | - | - | - | 18.9 | 34 | 49.1 | 64.2 |
►Factory Shoot
►FAQ
Q1: What is product can you buy from YUHAO?
A: Various sizes and models of flanges and pipe fittings, and we accept customized.
Q2: Can you provide samples?
A: Sure, we don't want there to be any mistakes in mass production. And we are pleasure to show our quality for you.
Q6: Do you have any Certification ?
A: Yes we have TUV ISO9001-2015 and Presure Equipment Directive 2014/68/EU(EN-10204 3.1/3.1B)
Q6: Can we visit your factory?
A: Sure, we welcome you to visit our factory , check our production lines and know more about our strength and quality.
Q6: Do you have quality control system?
A: Yes, we have ISO certifications and our own quality control laboratory.