Hot Rolled Seamless Carbon Steel Pipe API 5L Grade B X65 PSL2 for Oil and Gas Transmission Pipeline
Hot Rolled Seamless: This refers to the manufacturing process. The steel is formed at high temperatures without any seams or welds, creating a uniform structure that excels in high-pressure environments. This is a key differentiator from welded pipes.
Grade B & X65: These are material grades indicating the minimum Yield Strength.
●Grade B: The standard grade with a minimum yield strength of 245 MPa (35,500 psi).
●X65: A higher-strength grade with a minimum yield strength of 448 MPa (65,000 psi). The "X" denotes a higher performance category.
PSL2 (Product Specification Level 2): This is a crucial differentiator. PSL2 mandates stricter chemical composition controls, superior toughness (e.g., Charpy V-Notch impact testing), enhanced non-destructive testing, and higher mechanical property requirements compared to the more basic PSL1.
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API 5L Grade B (PSL2) |
API 5L X65 (PSL2) |
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Min. Yield Strength |
245 MPa |
448 MPa |
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Chemical Composition
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Standard controls
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Stricter controls on Carbon, Manganese, Micro-alloying elements |
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Typical Application
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Lower-pressure gathering lines, water injection lines, structural pilings |
High-pressure transmission trunk lines, offshore pipelines, demanding onshore routes |
While many suppliers meet the basic API 5L standard, YTDR engineers excellence into every meter of our seamless steel pipe. Here’s how our commitment translates into tangible benefits for your pipeline project:
1. Uncompromising Material Integrity & Superior Toughness
Our hot-rolled seamless pipes are produced from continuously cast, fine-grain steel billets. The seamless manufacturing process, devoid of welds, eliminates the weak points inherent in welded pipes. For PSL2 grade, we guarantee enhanced Charpy V-Notch impact toughness at temperatures as low as -20°C or lower, ensuring fracture resistance even in harsh environments. This makes YTDR pipes the ideal choice for:
●High-Pressure Transmission Lines
●Offshore & Submarine Pipelines
●Arctic and Cold Climate Operations
2. Full Traceability & Certified Peace of Mind
Every length of YTDR carbon steel pipe comes with a complete suite of documentation, including a 3.1 Mill Test Certificate that is fully traceable to the heat and batch number. This isn't just paperwork—it's your guarantee that the chemical composition, mechanical properties (yield strength, tensile strength), and non-destructive test results meet the most stringent requirements of API 5L PSL2. Our API Monogram license is your assurance of third-party verified quality.
3. Precision Dimensional Control for Flawless Installation
The hot rolling process for seamless tubing is meticulously controlled to ensure exceptional dimensional accuracy in outer diameter (OD) and wall thickness (WT). This consistency minimizes issues during welding and installation, reducing field-fit problems and keeping your project on schedule and within budget. We offer a comprehensive range of standard and non-standard sizes to meet your specific design requirements.
4. Enhanced Performance for Demanding Applications
YTDR's API 5L X65 seamless pipe offers a higher minimum yield strength (448 MPa) compared to Grade B (245 MPa). This allows for:
●Higher Operating Pressures: Transport more product with greater efficiency.
●Thinner Wall Design: Reduce the total tonnage and cost of your project without compromising safety or performance.
●Superior Deformation Resistance: Better withstand external loads and geotechnical stresses.
Raw Material (Billet) → Heating → Piercing → Elongation → Sizing → Cooling → Heat Treatment → Straightening → NDT Testing → Hydrostatic Test → End Finishing → Inspection → Coating → Packaging
Certification: API 5L/API 5CT, ASTM A106, ISO 9001.
●Steel Grade Customization:
●American Standard (ASTM): Gr. A, B, C, etc.
●European Standard (EN): S235, S275, S355, S420, S460, etc.
●Japanese Standard (JIS): SS400, STKR400, STKR490, etc.
●Chinese Standard (GB): Q195, Q235, Q355, etc.
●Canadian Standard (CSA): 300W, 350W, etc.
Testing: Full compliance with PSL2 requirements (Charpy impact test, hardness test).
From raw material sourcing to finished products, Yuantai Derun implements rigorous quality control at every step. We exclusively use traceable raw materials from reputable manufacturers, subjecting them to comprehensive inspections, including but not limited to:
●Dimensional & Visual Checks (appearance, size, straightness)
●Mechanical Testing (impact resistance, yield & tensile strength, hardness)
●Material Analysis (chemical composition, metallographic examination)
●Non-Destructive & Corrosion Testing (UT inspection, salt spray testing)
Contact us today to discuss your specific testing requirements—we ensure precision and reliability in every pipe.
At Yuantai Derun, we take pride in delivering premium square steel pipes. To let you experience our excellence firsthand, we’re pleased to provide free samples (up to 20 cm in length), shipped directly to you via express air freight—with only the shipping cost on your end.
Why hesitate? Put our materials to the test and discover why Yuantai Derun stands out in quality and reliability. Request your sample today!
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Product Description |
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Outer Diameter |
DN15-DN600
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Wall Thickness |
4-40 mm |
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Length |
1-12m according to client requirement |
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Tolerance |
±1% |
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Brand |
Yuantai Derun Steel Pipe Manufacturing Group |
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Grade |
C20,ST52,SAE1026,CK45,25MN |
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Surface Treatment |
Anti-Rust Oil Painted |
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Processing Service |
Welding, Punching, Cutting, Bending, Decoiling |
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Alloy Or Not |
Non-Alloy |
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Certificate |
CE,LEED,BV,PHD&EPD,BC1,EN10210/10219, ISO9000/14001/45001,DNV,ABS,JIS G3466 |
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MOQ |
2-5 Tons or No minimum order |
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Delivery Time |
7-30 days |
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Samples |
Free Samples Get Free Sample Now! |
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inch size |
DN |
OD |
SCH20 |
SCH30 |
SCH40 |
SCH 80 |
SCH 100 |
SCH 120 |
SCH 140 |
SCH 160 |
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1/4 |
DN8 |
13.7 |
- |
- |
2.24 |
3.02 |
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- |
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3/8 |
DN10 |
17.1 |
- |
- |
2.31 |
3.2 |
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- |
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1/2 |
DN15 |
21.3 |
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|
2.77 |
3.73 |
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|
4.78 |
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3/4 |
DN20 |
26.7 |
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|
2.87 |
3.91 |
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|
5.56 |
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1 |
DN25 |
33.4 |
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|
3.38 |
4.55 |
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|
|
6.35 |
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1-1/4 |
DN32 |
42.2 |
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3.56 |
4.85 |
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|
6.35 |
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1-1/2 |
DN40 |
48.3 |
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|
3.68 |
5.08 |
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|
7.14 |
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2 |
DN50 |
60.3 |
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3.91 |
5.54 |
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|
8.74 |
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2-1/2 |
DN65 |
73.0 |
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5.16 |
7.01 |
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|
9.53 |
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3 |
DN80 |
88.9 |
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5.49 |
7.62 |
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11.13 |
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DN100 |
101.6 |
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5.74 |
8.08 |
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4 |
DN100 |
114.3 |
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6.02 |
8.58 |
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11.13 |
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13.49 |
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5 |
DN125 |
141.3 |
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6.55 |
9.53 |
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12.7 |
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15.88 |
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6 |
DN150 |
168.3 |
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|
7.11 |
10.97 |
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14.27 |
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18.26 |
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8 |
DN200 |
219.1 |
6.35 |
7.04 |
8.18 |
12.70 |
15.09 |
18.26 |
20.26 |
23.01 |
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10 |
DN250 |
273.1 |
6.5 |
7.8 |
9.27 |
15.09 |
18.26 |
21.44 |
25.4 |
28.58 |
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12 |
DN300 |
323.9 |
7 |
9.53 |
10.31 |
17.48 |
21.44 |
25.4 |
28.58 |
33.32 |
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14 |
DN350 |
355.6 |
7.92 |
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11.13 |
19.05 |
23.83 |
27.79 |
31.75 |
35.71 |
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16 |
DN400 |
406.4 |
7.92 |
9.53 |
12.70 |
21.44 |
26.19 |
30.96 |
36.53 |
40.49 |
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18 |
DN450 |
457 |
7.92 |
11.13 |
14.27 |
23.83 |
29.36 |
34.93 |
39.67 |
45.24 |
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20 |
DN500 |
508 |
9.53 |
12.70 |
15.09 |
26.19 |
32.54 |
38.1 |
44.45 |
50.01 |
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24 |
DN600 |
610 |
9.53 |
14.27 |
17.48 |
30.96 |
38.89 |
46.02 |
52.37 |
59.54 |

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