Q345B Large Diameter Spiral Welded Pipe

Q345B Equivalents: Meeting International Standards

• Europe: EN10025 S355JR / S355JO

• USA: ASTM A572 Grade 50

• International: ISO E355B

Technical Specifications & Manufacturing Range

Rigorous Quality Control: Your Safety, Our Priority

• 100% Ultrasonic Testing (UT): Continuous online monitoring of the weld seam.

• X-Ray Inspection: Final verification of all T-joints and critical weld sections.

• Hydrostatic Pressure Test: Every pipe is tested to ensure it meets the design pressure requirements of API 5L or ASTM standards.

• PMI & Mechanical Testing: Verification of chemical composition (C, Mn, Si) and tensile properties before the pipe leaves the factory.

Optimized Logistics for Oversized Pipes

• The Nesting Strategy: We save our clients up to 30% in freight costs by nesting smaller pipes inside larger ones (e.g., placing an 800mm pipe inside a 1600mm pipe).

• Pipe End Protection: Heavy-duty steel or plastic end protectors prevent "out-of-roundness" during crane handling.

• Bulk Carrier Coordination: For large project orders, we utilize break-bulk vessels with specialized lashing to prevent surface damage.

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