When it comes to their chemical makeup, API 5L X65 PSL2 pipes typically have carbon (C) capped at ≤ 0.18%, silicon (Si) at ≤ 0.45%, manganese (Mn) at ≤ 1.70%, phosphorus (P) at ≤ 0.025%, and sulfur (S) at ≤ 0.015%. They also include micro-alloying elements like vanadium (V), niobium (Nb), and titanium (Ti) within controlled limits. The carbon equivalent (CEq) is generally kept to around 0.43 max to ensure good weldability and toughness. ([Ashapura Steel][1])
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What is High Carbon Steel API 5L X65 PSL 2 Pipes?
On the mechanical side, these pipes boast a minimum yield strength of about 450 MPa (approximately 65,300 psi) and, depending on the specifications, can reach tensile strengths of up to around 600 MPa (about 87,000 psi). They typically have a minimum elongation of about 23%, which helps ensure ductility and toughness when under stress. ([filizsteel.com][2])
Carbon Steel API 5L X65 PSL 2 Pipes Specification
| Standard | ISO 3183 L450/ API 5L X65 |
| Grade of material | X65 / L450 (N, M, Q, R) |
| PSL Level | |
| API 5L X65 PSL2 Seamless Pipe (OD) | 21.3 – 660mm ( Inch 1/2” – 26”) |
| X65 Steel LSAW / DSAW | 16’OD TO 54″ OD (8 MM TO 50 MM THK) |
| X65 Carbon Steel SAW | 16″ – 100″ NB |
| API 5L X65 PSL1 ERW and HFW | 1/2” NB – 24” NB |
| Coating for API 5L X65 PSL2 Line Pipe | 3PP, Anti-Rust Oil, CRA clad, FBE, lined pipe, Varnished, Black Painting, 3PE, 3LPE, Galvanized, |
| API 5L Grade X65 Pipe end | Cut Grooves, Square Cut, Grooved, Vibrator Grinding, Plain end (PE), Chamfering, Coupling, Screwed, Pub Joints, Deburring, Thread Cutting, Flanged Ends, Socket, Squared Ends, Threaded Ends (Male & Female), Buttweld, Beveled End (BE) |
| Cutting Facility | Laser Cutting, Sawing, Tapping, Water Jet Cutting |
| Equivalent Standards | JIS, DIN, NFA, BS, CSA, GOST, AWWA, KS, UNI, AISI, IS, EN, API, SAE, ANSI, ISO, ASTM, GB, SS |
| Grade X65 PSL2 Pipe Length | DRL, SRL, 20FT, 40FT, Single Random Length (SRL), Double Random Length (DRL), and Fixed Length 5.8 Meter, 12.0 Meters (40FT), 6.0 Meters (20FT), 11.8 Meters, |
| API 5L X65 Wall Thickness | SCH-STD, SCH160, SCH80, SCH-XXS, SCH-XS, SCH40 |
| Manufacturing process | Welded, Seamless, Electro Fusion Seam Welded (EFSW), Hot Finish Seamless (HFS), Longitudinally Submerged Arc Welded (LSAW), Cold Drawn Seamless (CDS), Electric Resistance Welded (ERW), Horizontal Submerged Arc Welded (HSAW), Extrusion, Submerged Arc Welded (SAW) |
Carbon Steel API 5L X65 PSL 2 Pipes Chemical Composition
| Element | Seamless & Welded (X65Q) | Welded Pipe Only (X65M) |
|---|---|---|
| Carbon (C) | 0.18% max | 0.12% max |
| Silicon (Si) | 0.45% max | 0.45% max |
| Manganese (Mn) | 1.70% max | 1.60% max |
| Phosphorus (P) | 0.025% max | 0.025% max |
| Sulfur (S) | 0.015% max | 0.015% max |
| Vanadium (V) | as agreed (micro-alloying) | as agreed |
| Niobium (Nb) | as agreed | as agreed |
| Titanium (Ti) | as agreed | as agreed |
| Other elements (Cu, Ni, Cr, Mo) | limits usually specified by agreement (e.g., Cu ≤ 0.50%, Ni ≤ 0.30%, Cr ≤ 0.30%, Mo ≤ 0.15%) | similar limits by agreement |
| Carbon Equivalent (CE) | CE IIW ≤ 0.43 | CE IIW ≤ 0.43 |
| CEPcm ≤ 0.25 | CEPcm ≤ 0.25 |
Carbon Steel API 5L X65 PSL 2 Pipes Mechanical Properties
| Property | Requirement |
|---|---|
| Minimum Yield Strength | 450 MPa (65,300 psi) |
| Maximum Yield Strength | 570 MPa (82,700 psi) |
| Minimum Tensile Strength | 535 MPa (77,600 psi) |
| Maximum Tensile Strength | 760 MPa (110,200 psi) |
| Yield to Tensile Ratio | ≤ 0.93 |
| Elongation | As per API 5L formula (depends on size & thickness) |
| Impact Test (CVN) | Mandatory for PSL 2 |
| Test Temperature | As specified (commonly −10°C to −30°C) |
| Hardness (Base Metal / HAZ / Weld) | ≤ 250 HV (typical limit) |
If You Are Looking To Buy High Quality Pipes, Sheet, Fittings and Flanges
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
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Stolt Steels is the largest stockist of Carbon Steel API 5L X65 PSL 2 Pipes in Dubai, UAE.
Stolt Steels is a trusted stockist, stockist, and supplier of premium-quality steel products in Dubai, UAE, serving diverse industrial sectors with reliable materials and timely delivery. With a strong commitment to excellence, we offer a wide range of pipes,sheets, plates, and other metal solutions designed to meet global standards. Our extensive inventory, expert support, and customer-focused approach make us a preferred partner for companies seeking durable and high-performance steel products. For inquiries or orders, contact us at sales@stoltsteels.com.
Types of Carbon Steel API 5L X65 PSL 2 Pipes
Uses of Carbon Steel API 5L X65 PSL 2 Pipes
API 5L X65 PSL2 pipes are commonly used for transporting oil, natural gas, water, and other industrial fluids across upstream, midstream, and downstream pipeline networks. Their strength, toughness, weldability, and adherence to rigorous inspection and testing protocols (including non-destructive testing and impact/toughness assessments) make them ideal for long-distance transmission pipelines, offshore and onshore energy infrastructure, and industrial fluid distribution systems where durability and safety are paramount. ([ferropipe.com][3])
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