High-strength Welded Pipe For Critical Applications
Efw pipe offers robust, corrosion-resistant solutions for high-pressure applications in oil, gas, and chemical industries, ensuring durability and precision.
High-strength Welded Pipe For Critical Applications
Efw pipe offers robust, corrosion-resistant solutions for high-pressure applications in oil, gas, and chemical industries, ensuring durability and precision.
EFW Pipe (Electric Fusion Welded Pipe) is a high-quality welded steel pipe produced using electric fusion welding, a process that employs electric arcs or electron beams to create strong, reliable welds. Designed for high-pressure and corrosive environments, EFW pipes are widely used in industries like oil and gas, petrochemical, and power generation, meeting standards such as ASTM A312, ASME B36.10, and API 5L.
The manufacturing process involves forming steel plates or coils into a cylindrical shape, followed by welding the longitudinal seam using electric fusion techniques, often with filler material. The weld is smoothed using scarfing blades, and post-weld heat treatment may be applied to enhance strength and reduce residual stresses. EFW pipes are available in diameters from 6 inches to 100 inches (152 mm to 2540 mm) and wall thicknesses from Schedule 10 to Schedule 160, offering versatility for various project requirements.
EFW pipes undergo rigorous quality control, including ultrasonic, hydrostatic, and X-ray testing, to ensure defect-free welds and compliance with industry standards. Protective coatings such as 3LPE, Fusion Bonded Epoxy (FBE), or galvanizing enhance corrosion-resistant EFW pipe performance in harsh environments like offshore pipelines or chemical processing plants. Their ability to handle high pressures and corrosive fluids makes them a cost-effective alternative to seamless pipes.
Compared to Electric Resistance Welded (ERW) or Double Submerged Arc Welded (DSAW) pipes, EFW pipes excel in applications requiring thick walls and corrosion resistance, particularly when made from stainless steel (e.g., 304, 316L) or high-nickel alloys. The precise welding process ensures minimal deformation, maintaining dimensional accuracy and structural integrity for critical piping systems.
EFW pipes address challenges like corrosion, high pressure, and thermal stress, making them a reliable choice for engineers seeking durable industrial piping solutions. Their high weld quality and material versatility ensure long-term performance in demanding applications across oil, gas, and chemical industries.
| Grade | C (% max) | Si (% max) | Mn (% max) | P (% max) | S (% max) | Cr (%) | Ni (%) |
|---|---|---|---|---|---|---|---|
| API 5L Grade B | 0.28 | 0.45 | 1.20 | 0.03 | 0.03 | - | - |
| ASTM A312 Grade 304 | 0.08 | 1.00 | 2.00 | 0.045 | 0.03 | 18.0-20.0 | 8.0-11.0 |
| ASTM A671 | 0.24 | 0.13-0.45 | 0.98 | 0.035 | 0.035 | - | - |
The chemical composition ensures weldability, strength, and corrosion resistance for EFW pipe in demanding applications.
| Grade | Tensile Strength (MPa min) | Yield Strength (MPa min) | Elongation (% min) |
|---|---|---|---|
| API 5L Grade B | 415 | 245 | 23 |
| ASTM A312 Grade 304 | 515 | 205 | 40 |
| ASTM A671 | 450 | 240 | 22 |
These properties ensure EFW pipes provide reliable performance in high-pressure and corrosive environments.
EFW Pipes offer distinct advantages over ERW and DSAW pipes, particularly in high-pressure and corrosive applications. Below is a comparison of key features.
| Feature | EFW Pipe | ERW Pipe | DSAW Pipe |
|---|---|---|---|
| Welding Process | Electric Fusion Welding (arc/electron beam) | Electric Resistance Welding | Double Submerged Arc Welding |
| Diameter Range | 6–100 inches | 1/8–24 inches | 4–167 inches |
| Wall Thickness | Sch 10–160 | 1.5–20 mm | 2.1–100 mm |
| Applications | High-pressure, corrosive environments | Low to medium-pressure systems | Oil/gas pipelines, structural piles |
| Weld Quality | High (deep penetration) | Moderate | High (100% penetration) |
| Cost | Moderate to high | Lower | Higher |
Why Choose EFW Pipes? Their high weld strength, corrosion resistance, and suitability for thick-walled applications make them ideal for critical industries compared to ERW or DSAW pipes.
| Standard | Grades | Applications | Characteristics |
|---|---|---|---|
| ASTM A358 | 304, 304L, 316, 316L, and other stainless steel grades. | Chemical processing, food processing, marine environments. | High corrosion resistance for welded stainless steel pipes. |
| ASTM A671 | CA55, CB60, CB65, CB70, and other carbon steel grades. | Low-temperature environments like cryogenic systems. | Toughness and reliability in sub-zero conditions. |
| ASTM A672 | A45, A50, B60, B65, B70, and other carbon/alloy steel grades. | Medium-temperature systems like power generation. | Balances strength and ductility for moderate temperatures. |
| ASTM A691 | CM65, CM70, CM75, and other alloy steel grades. | High-pressure systems like boilers and pressure vessels. | Enhanced strength for high-pressure conditions. |
| API 5L | Grade B, X42, X52, X60, X65, X70, and other carbon steel grades. | Long-distance oil and gas pipelines. | High strength and durability, with increasing yield strength by grade. |
Electric fusion welding ensures robust, reliable joints.
Available from 6 to 100 inches for diverse projects.
Enhanced by 3LPE, FBE, or stainless steel materials.
Ideal for high-pressure pipelines and systems.
Precise manufacturing for seamless installation.
Meets ASTM A312, ASME B36.10, and API 5L standards.
EFW Pipe Manufacturing Process
Electric Fusion Welding (EFW) steel pipes are manufactured using electron beam welding, delivering strong, high-quality welds for demanding industrial applications.
EFW steel pipes are produced by directing a high-speed electron beam at the workpiece, converting kinetic energy into heat to melt and form a weld. This process creates a seamless, robust joint without filler material, ensuring high strength and uniformity. EFW pipes are commonly used in industries like oil and gas, petrochemicals, and power generation, where reliable welds are critical.
Meeting standards such as ASTM A671, ASTM A672, and API 5L, EFW pipes are ideal for high-pressure and high-temperature applications, including pipelines and structural systems. The electron beam welding process ensures precise control, resulting in pipes with excellent durability and resistance to stress, suitable for large-diameter and thick-walled configurations.
The EFW process produces pipes with superior weld quality, making them a preferred choice for critical piping systems requiring strength and reliability.
Explore EFW pipes with targeted long-tail keywords for specifications, applications, and materials.
Note: EFW pipes meet international standards, ensuring high performance and reliability. Contact suppliers for detailed specifications.
EFW Pipes deliver robust, corrosion-resistant solutions for critical applications on a global scale, serving industries such as oil, gas, filtration, refrigeration, refining, petrochemical, and offshore, ensuring reliability in high-pressure and corrosive environments.
Transports crude oil and refined products in high-pressure pipelines.
Supports natural gas transportation in pipelines.
Used in filtration systems for fluid processing.
Facilitates coolant transport in refrigeration systems.
Handles refined products in processing plants.
Transports chemicals in petrochemical facilities.
Supports offshore pipelines and structural applications.
Transports steam and water in power plants.
Conveys sludge and waste products.
Why Choose EFW Pipes? Their superior weld strength, corrosion resistance, and versatility make them ideal for critical applications in oil, gas, petrochemical, and power generation industries.
Hfi pipe offers high-quality, cost-effective solut...
Anti-corrosion steel pipes provide robust protecti...
Jcoe pipe offers high-strength, large-diameter sol...
Dsaw pipe offers high-strength, durable solutions ...
Erw pipe offers cost-effective, high-quality solut...
special welded tubes are engineered to meet specif...