S235JRH High Toughness High Frequency Welded Pipe EN10219

S235JRH High Toughness High Frequency Welded Pipe (EN 10219)

Raw Material PreparationHigh-quality hot rolled steel coil conforming to EN 10219 standard, with strict control on chemical composition and mechanical properties to ensure high toughness and weldability for S235JRH grade.

Uncoiling & LevelingSteel coil is uncoiled, leveled and cut to the required length to eliminate surface defects and ensure flatness.

Cold Roll FormingThe steel strip is continuously formed into a circular open shell through a multi‑stand roll forming line, ensuring uniform deformation and stable cross‑section shape.

High Frequency Welding (HFW)High frequency induction heating is applied to the two edges of the open shell to reach welding temperature rapidly. Under high pressure extrusion, the edges are fused together to form a solid weld line without filler metal.

Weld Bead TrimmingInside and outside weld beads are removed smoothly by special trimming tools to maintain consistent wall thickness and surface quality.

Sizing & StraighteningThe welded pipe is sized to achieve accurate outer diameter and roundness, then straightened to meet straightness tolerance required by EN 10219.

Cutting to LengthAutomatic flying saw cuts the pipe into fixed lengths according to customer requirements.

Non‑Destructive & Mechanical TestingIncluding online weld inspection, flattening test, bending test, impact test at +20℃ and tensile test to verify compliance with S235JRH toughness and structural performance.

Surface Treatment & Final InspectionSurface is cleaned, oiled or treated as required. Final inspection covers dimension, appearance, mechanical properties and marking before packaging and delivery.