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EFW Pipes

EFW Pipes

Metal Yard produces EFW pipes in stainless steel, duplex, super duplex, carbon steel, alloy steel, nickel alloy, and copper nickel grades. The process fuses a formed plate or coil along the seam using electric welding, with no filler added. That single-seam construction lets manufacturers produce large diameters and heavier walls that the seamless construction struggles with.

Stainless grades cover TP-304, TP-316, TP-321, TP-347, and several variants in between. Plain or beveled ends, depending on what the installation needs. Duplex and super duplex pipes go through controlled hot or cold working to achieve the target mechanical properties. Copper nickel EFW pipes in C70600 and C71500 run through automatic welding setups that hold wall thickness and ovality tight.

Nickel alloy grades including Inconel 625, Hastelloy C276, and Monel 400 go into corrosive service in oil and gas, offshore structures, and chemical plants. Every pipe batch clears PMI, hydrostatic testing, hardness checks, and flattening or flaring tests before it leaves the facility. Mill test certificates and third-party inspection reports are available on request.

Specifications of EFW Pipes

Metal Yard stocks standard and non-standard EFW pipe dimensions. Below are the full dimensional and supply parameters.

Parameter Details
Size (NB) 1/8" NB to 24" NB
Size (OD) 1/4" OD to 24" OD
Wall Thickness 4.0 mm to 100 mm
Length Cut length, fixed length, single random, double random, required length
Form Round, square, rectangular
End Finish Plain end, beveled end, threaded end
Applicable Standards ASTM, ASME, API, DIN, BS
Tests Conducted PMI/IGC, hardness, hydrostatic, radiography, flattening/flaring, macro/micro, chemical/mechanical
Documents on Request Mill test certificate, QAP, fumigation certificate, heat treatment chart, commercial invoice, packing list
Surface Options As-welded, pickled, passivated, polished

EFW Pipes Material and Grades

Metal Yard covers six material families for EFW pipes. Each carries its own applicable standards and grade range.

Material

Standards and Grades

Stainless Steel

ASTM A358, A790 TP-304/L/LN/H/N, TP-316/L/LN/H/N/Ti, TP-317L, TP-317LM, TP-321/H, TP-347/H; ASTM A213/A269/A270/A632 TP series: 201, 202, 304, 304H, 304L, 304N, 304LN, 309, 310, 310S, 316, 316H, 316L, 316LN, 316Ti, 317, 317L, 321, 321H, 347, 347H, 348, 348H, 904L, XM10, XM11, XM15, XM19, XM29

Duplex and Super Duplex Steel

ASTM A240/ASME SA240; UNS S31803, S32205; Werkstoff No. 1.4462

Carbon Steel

ASTM A53, A106 Gr. A/B/C; API 5L Gr. A/B, X42, X52, X60; ASTM A333 Gr. 1/6; ASTM A179; ASTM A192; DIN 17175/2391; BS 3059 Gr. 1 and Gr. 2; ASTM A334 Gr. 1/6/8

Alloy Steel

ASTM A530/A530M; ASTM A335 Gr. P1, P5, P9, P11, P22, P91

Nickel Alloy

ASTM/ASME B163, B161, B725, B730; UNS 2200 (Nickel 200), UNS 2201 (Nickel 201), UNS 4400 (Monel 400), UNS 8020 (Alloy 20/20CB3), UNS 8825 (Incoloy 825), UNS 6600 (Inconel 600), UNS 6601 (Inconel 601), UNS 6625 (Inconel 625), UNS 10276 (Hastelloy C276)

Copper Alloy

ASTM SB467, SB468, SB608, SB543, SB552; UNS C70600 (Cu-Ni 90/10), C71500 (Cu-Ni 70/30); UNS C10100, C10200, C10300, C10800, C12000, C12200

Other Types of EFW Pipes

Metal Yard supplies EFW pipes across alloys, grades, and configurations. Commonly requested variants are listed below.

Stainless Steel EFW Pipes

SS Electro Fusion Welded Pipes

ASTM A358 TP304 EFW Pipes

ASTM A358 TP304L EFW Pipes

ASTM A358 TP316 EFW Pipes

SS TP316L EFW Pipes

Inconel 600 EFW Pipes

Inconel 625 EFW Pipes

Hastelloy C276 EFW Pipes

Hastelloy C22 EFW Pipes

Monel 400 EFW Pipes

Incoloy 825 EFW Pipes

Alloy 20 EFW Pipes

Nickel Alloy 200 EFW Pipes

Duplex Steel 2205 EFW Pipes

Super Duplex Steel EFW Pipes

Carbon Steel EFW Pipes

Titanium Grade 2 EFW Pipes

Titanium Grade 5 EFW Pipes

Copper Nickel 90/10 EFW Pipes

Cu-Ni 70/30 EFW Pipes

Incoloy 800 EFW Pipes

Applications of EFW Pipes

Oil and gas transmission pipelines account for a large share of EFW pipe demand, particularly in larger diameters where seamless production becomes uneconomical. Carbon steel and API 5L grades do most of that work.

Petrochemical and chemical processing plants pull stainless and nickel alloy grades for acid lines, reactor feed circuits, and chloride-heavy environments where carbon steel corrodes within months. Power plants, both thermal and gas-fired, use alloy steel EFW pipes in boiler circuits and superheater lines running above 500°C.

Offshore structures need seawater resistance without coating dependence. Copper, nickel and super duplex EFW pipes cover that. On shore, water treatment and desalination plants use stainless steel EFW pipes for distribution lines where cleanliness and corrosion life both matter.

Heat exchangers and condensers use EFW pipes as pressure boundary components around tube bundles. Pressure vessel nozzle connections and boiler shell circuits also rely on EFW pipes, where weld seam integrity directly affects the pressure certification outcome.

Manufacturing Process of EFW Pipes

Production starts with plate or coil selection against the target grade's chemical and mechanical requirements. Incoming material clears physical and chemical checks before anything moves to forming.

Edge preparation trims and aligns both strip edges so the fusion line forms without gaps or misalignment. The plate or strip then gets roll-formed or press-bent into a cylinder, depending on the diameter and wall thickness in question.

Welding joins the seam by electric fusion. No filler material enters the joint. Localised heat at the interface fuses both edges under controlled pressure. For alloy steel and thick-wall stainless grades, post-weld heat treatment follows to relieve residual stress.

Sizing and straightening brings the pipe within dimensional tolerance. Surface finishing, pickling, passivation or polishing, depends on the end use and buyer specification. Final inspection runs hydrostatic pressure tests, radiographic examination of the weld seam and full dimensional checks. Pipes that pass get marked, stenciled, and packed for dispatch.

Why Choose Metal Yard's EFW Pipes?

All EFW pipes at Metal Yard are manufactured to ASTM, ASME, and API standards. That applies across every material group, not just the common grades.

Custom sizes, wall thicknesses, and cut lengths are available. Standard dimensions go out from stock. Non-standard orders run against confirmed lead times. Weld integrity and dimensional checks are carried out at several points in production, not only at the end. Each batch undergoes PMI, hardness, hydrostatic and flattening tests.

Third party inspection can be arranged for the buyer. Export grade packaging consists of wooden crating, end caps, and moisture protection where necessary. Mill certificates, QAP, and heat treatment records are included with the material shipment.

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We are Experts in Exporting EFW Pipes worldwide

We are Exporter of EFW Pipes in Worldwide Such as Ghana, India, Australia, Oman, Lebanon, Belgium, Afghanistan, South Korea, United Arab Emirates, Finland, Zimbabwe, Argentina, Mexico, China, Trinidad & Tobago,Tunisia, Bulgaria, Poland, Ireland, Nepal, Bhutan, Croatia, Yemen, Greece, Macau, Lithuania, Mongolia, South Africa, Chile, Nigeria, Austria, Turkey, Jordan, Ecuador, Namibia, Gambia, France, Qatar, Kazakhstan, Costa Rica, Sweden, Estonia, Azerbaijan, Iraq, Kuwait, Romania, United Kingdom, Spain, Indonesia, Vietnam, Tibet, Iran, Russia, Ukraine, Portugal, Denmark, Nigeria, Slovakia, Puerto Rico, Kenya, Morocco, Czech Republic, Netherlands, Taiwan, Poland, Gabon, Iran, Germany, Libya, Philippines, Italy, Colombia, Saudi Arabia, United States, Belarus, Switzerland, Hong Kong, Brazil, Bolivia, Peru, Sri Lanka, Algeria, Bahrain, Israel, Singapore, Egypt, Chile, Malaysia, Thailand, Mexico, Bangladesh, Canada, Hungary, Norway, Angola, Pakistan, Venezuela, Japan, Serbia, New Zealand.

We are Supplier of EFW Pipes in India

We are Suppliers of EFW Pipes in India Such as Navi Mumbai, Istanbul, Singapore, Hanoi, Montreal, Ho Chi Minh City, Bangkok, Al Jubail, Pimpri-Chinchwad, Howrah, New Delhi, Visakhapatnam, Karachi, Hyderabad, Jakarta, Granada, Ahmedabad, Cairo, Mumbai, Bhopal, Manama, Dammam, Seoul, Gurgaon, Edmonton, Baroda, Ernakulam, Sydney, Lahore, Thiruvananthapuram, Port-of-Spain, Thane, Noida, Faridabad, Kanpur, Secunderabad, Geoje-si, Jeddah, Sharjah, Indore, Algiers, Perth, Nashik, Ranchi, Rajkot, New York, Busan, La Victoria, Dubai, Vadodara, Milan, Calgary, Bengaluru, Kolkata, Hong Kong, Mexico City, Chandigarh, Ahvaz, Chennai, Kuwait City, Courbevoie, Ankara, Madrid, Lagos, Abu Dhabi, Doha, Haryana, Houston, Caracas, Chiyoda, Brisbane, Tehran, Toronto, Los Angeles, Muscat, London, Nagpur, Kuala Lumpur, Gimhae-si, Coimbatore, Atyrau, Al Khobar, Vung Tau, Petaling Jaya, Colombo, Rio de Janeiro, Moscow, Pune, Surat, Bogota, Riyadh, Ludhiana, Aberdeen, Jaipur, Santiago, Melbourne, Dallas, Jamshedpur, Ulsan.

ERW uses high-frequency resistance to create weld heat at the seam edges, whereas EFW employs electric arc fusion. EFW is more consistent for thicker walls and larger diameters compared to ERW.

EFW pipes are utilized in oil and gas pipelines, petrochemical plants, boiler circuits, offshore structures, desalination systems, heat exchangers, and nozzle connections for pressure vessels.

Pipes produced to ASTM A358 or API 5L and tested to the hydrostatic requirement carry pressure ratings on par with seamless pipes at the same schedule and diameter.

Stainless steel, duplex, super duplex, carbon steel, alloy steel, Inconel, Hastelloy, Monel, Incoloy, and copper nickel grades are all available.

Metal Yard supplies 1/8" NB to 24" NB, with OD up to 24" and wall thickness from 4.0 mm to 100 mm, in round, square, and rectangular forms.

Seamless production above 16" NB gets expensive and lead times stretch. EFW reaches those diameters at lower cost with equivalent pressure performance when produced to standard.

Yes. Cut lengths, fix lengths, single random, and double random are all available. Non-standard wall thickness and OD get manufactured against confirmed orders.