Q355B Precision Welded Steel Pipe

Precision Welded Pipe Product Introduction

Q355B precision welded steel pipe is a high-precision steel pipe made from Q355B low-alloy high-strength structural steel using advanced high-frequency welding technology and precision cold rolling process. This product features high dimensional accuracy, good surface quality, and excellent mechanical properties, and is widely used in fields requiring high pipe precision and surface finish.

Main Application Areas

Q355B precision welded steel pipe, with its superior dimensional accuracy (outer diameter tolerance ±0.15mm) and excellent surface quality (roughness Ra≤0.8μm), is irreplaceable in high-end industrial fields. This product is mainly used in the manufacture of core mechanical components such as hydraulic system cylinders and precision drive shafts, and is also widely used in automotive chassis structural components, robot articulated arms, and high-end furniture load-bearing frames. Its uniform mechanical properties and good cold bending characteristics make it the preferred material for precision instrument support components and automated equipment guide rails, fully meeting the stringent requirements of modern industry for lightweight, high-precision structural components.

Non-destructive Testing

The non-destructive testing of Q355B precision welded steel pipes employs a multi-technology integrated testing system. Ultrasonic testing performs a full-length scan of the weld area, accurately identifying internal incomplete fusion and porosity defects with a depth ≥0.5mm. Simultaneously, eddy current testing technology provides full-coverage testing of the pipe surface, effectively capturing micron-level cracks and inclusions. For critical pressure-bearing areas, industrial CT is used for three-dimensional tomographic scanning, enabling three-dimensional analysis of defect morphology.

About us

GNEE STEEL Group's main products, Q355B precision welded pipes and high-end special steel pipes, have all passed international system certifications such as ISO and ASTM. We can provide customers with a full-chain service from procurement and production quality control to international logistics (sea freight, shipping, and logistics transportation).

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