Welded Tubes

Petrosadid: Welded Tubes

PETROSADID is a leading supplier of welded tubes providing an extensive selection of all grades and dimensions to the oil & gas, petrochemical, chemical and power industries. We work closely together with certified tube manufacturers from around the world ranging from Electric Resistance Welded (ERW) to Fusion Welded (EFW) tubes.

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ERW

ERW steel tube is manufactured through low or high frequency resistances Electric Resistance. Welding seam is in longitudinal. During the ERW tube welding processes, the electric current will make the heat when flow through the contact surface of the welding area. It will heat the two edges of the steel to a point that the edges can form a bond. Meanwhile with the combined pressure, the edge of the tube billet steel melted and extruded together.

Major applications

• Water pipelines

• Agriculture & irrigation (Water mains, industrial water pipe lines, plant piping, deep tube-wells & casing pipes, sewerage piping)

• Gas pipe lines

• LPG and other non-toxic gas lines

Petrosadid: Welded Tubes

EFW

Processing of Electric Fusion Welding, also called Continuous Welding begins as coiled steel with appropriate thickness, width and weight is made. To form a continuous ribbon of steel several coils are welded together. Then the steel ribbon is heated to the necessary temperature and formed into an oval. In the next step the edges of the tube strip are permanently pressed together by rolls in order to receive a forged weld. In the last stage sizing rolls convert the welded tube into specific dimensions.

Petrosadid: Welded Tubes

Highlights of the ERW/ EFW Pipe

Materials

• ASTM A 178,

• ASTM A 214,

• ASTM A 226,

• ASTM A 423

• ASTM A 519

• ASTM A 249,

• ASTM A268/A268M

• ASTM A269/A269M

• ASTM A 312,

• ASTM A 358,

• ASTM A409,

• ASTM B 673,

• ASTM B 674,

• ASTM A 731,

• ASTM A789/A789M

• ASTM A790

• ASTM B 464,

• ASTM B 468,

• ASTM B 514,

• ASTM B 515,

• ASTM B 516,

• ASTM B 517,

• ASTM B 619,

• ASTM B 626,

• ASTM B 704,

• ASTM B 705,

• ASTM B 725,

• ASTM B 730,

• ASTM B 775

• ASTM B 338,

• ASTM B 862

• ASTM B 467,

• ASTM B 543,

• ASTM B 608

Standard

ASME 36.10, ASME 36.19 are the key specifications covering the standardization of dimensions of welded and seamless wrought steel pipe. ASME B16.25 covers the preparation of butt weld connections between pipes and fittings and ASME B16.49 covers the marking details.

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