Linepipe API SPEC 5L / ASTM A106 / A53
Linepipe API SPEC 5L / ASTM A106 / A53
| A53 Chemical Composition | ||||||||||||||||||
| Requirements | composition，%,≤ | |||||||||||||||||
| C | Mn | P | S | Cu① | Ni① | Cr① | Mo① | V① | ||||||||||
| Type S (Seamless Pipe) | ||||||||||||||||||
| Steelmaking Process: Open-hearth furnace, electric furnace, or basic oxygen converter Grade A Grade B |
0.25 0.30 |
0.95 1.20 |
0.05 0.05 |
0.045 0.045 |
0.40 0.40 |
0.40 0.40 |
0.40 0.40 |
0.15 0.15 |
0.08 0.08 |
|||||||||
| Type E (Electric-Resistance-Welded Pipe) | ||||||||||||||||||
| Steelmaking Process: Open-hearth furnace, electric furnace, or basic oxygen converter Grade A Grade B |
0.25 0.30 |
0.95 1.20 |
0.05 0.05 |
0.045 0.045 |
0.40 0.40 |
0.40 0.40 |
0.40 0.40 |
0.15 0.15 |
0.08 0.08 |
|||||||||
| Type F (Furnace-Welded Pipe) | ||||||||||||||||||
| Steelmaking Process: Open-hearth furnace, electric furnace, or basic oxygen converter Grade A |
0.30 |
1.2 |
0.05 |
0.045 |
0.40 |
0.40 |
0.40 |
0.15 |
0.08 |
|||||||||
| Note ①: The sum of these 5 elements shall not exceed 1.00%. | ||||||||||||||||||
| A106 Chemical Composition | |||||||
| Element | composition ,% | Element | composition ,% | ||||
| Grade A | Grade B | Grade C | Grade A | Grade B | Grade C | ||
| C, ≤① | 0.25 | 0.30 | 0.35 | Cr,≤② | 0.40 | 0.40 | 0.40 |
| Mn, | 0.27～0.93 | 0.29～1.06 | 0.29～1.06 | Cu,≤② | 0.40 | 0.40 | 0.40 |
| P,≤ | 0.035 | 0.035 | 0.035 | Mo,≤② | 0.15 | 0.15 | 0.15 |
| S,≤ | 0.035 | 0.035 | 0.035 | Ni, ≤② | 0.40 | 0.40 | 0.40 |
| Si,≥ | 0.10 | 0.10 | 0.10 | V, ≤② | 0.08 | 0.08 | 0.08 |
| ① For each 0.01% decrease in carbon content below the specified maximum, the manganese content may be increased by 0.06% above the specified maximum, up to a maximum of 1.35%. | |||||||
| ② The sum of these five elements shall not exceed 1.00%. | |||||||
Linepipe as per API SPEC 5L/ASTM A106/A53
| Product | Line Pipe, API Line Pipe, Seamless Line Pipe, Carbon Steel Line Pipe |
| Application | For Transportation of petroleum and natural gas |
| Pipe Standard | API SPEC 5L |
| Size | OD: 21.3mm-630mm |
| WT: 1.5mm-35mm | |
| Grade | Gr.A,Gr.B,X42,X46,X52,X56,X60,X65,X70, X80,X100 |
| Length | 5.8m/6.1m/11.8m/12m |
| Connection Type | Plain End, Bevelded Ends |
| Coating: | Black Varnish, 3PE, 3PP |
| Packing: | Plastic protection caps in Both Ends, Hexagonal packaging, Two Tags |
Product Advantages
Packaging & Delivery
Process Flow Chart
Product Overview Seamless carbon steel (CS) pipe—commonly called SMLS pipe—is manufactured from solid steel billets without any welded seam. This single-piece construction delivers superior strength, uniform pressure resistance, and exceptional reliability for the most demanding industrial applications. Produced through hot rolling or cold drawing processes, our seamless pipes meet the highest international standards for quality and performance. Key Features & Benefits Seamless Strength: No weld line eliminates weak points, ensuring uniform pressure handling capability High Performance: Withstands extreme pressures and temperatures without deformation or failure Clean Interior: Smooth bore reduces friction and prevents buildup for optimal flow efficiency Full Size Range: From small-diameter precision tubing to large transmission pipe Multiple Grades: Standard, high-strength, and special chemistry options available Applications Oil & gas transmission pipelines High-pressure boiler systems Power generation steam lines Chemical processing equipment Refinery process piping Structural and mechanical construction Manufacturing Standards API 5L: Grade B, X42, X52, X60, X65, X70 for line pipe ASTM A106: Grade B/C for high-temperature service ASTM A53: Grade A/B for general and pressure applications DIN/EN: European standards compliance available Quality Assurance Every pipe undergoes 100% hydrostatic testing, ultrasonic inspection, and dimensional verification. Full material traceability with EN 10204 3.1 mill test certificates provided.
Details
Linepipe API SPEC 5L / ASTM A106 / A53 Product Overview High-performance carbon steel linepipe manufactured to API 5L, ASTM A106, and A53 specifications for seamless and welded transmission systems. Standards & Grades API 5L: Grade B, X42, X46, X52, X60, X65, X70 ASTM A106: Grade B, C (high-temperature seamless) ASTM A53: Grade A, B (black/hot-dipped galvanized) Key Features Superior pressure rating for hydrocarbon transport High-temperature resistance up to 750°F (A106) Available in PSL1/PSL2 compliance (API 5L) Multiple coating options: 3LPE, FBE, black varnish Applications Crude oil & natural gas pipelines Refinery & petrochemical process piping Water & steam transmission Offshore platform risers Specifications Size: 1/8"–48" OD, SCH 10–XXS Type: Seamless Testing: Hydrostatic, Ultrasonic, X-Ray Certification: API 5L Monogram, ISO 9001, PED Engineered for reliable fluid transmission in demanding energy and industrial infrastructure projects.
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