Zhejiang Seamless Pipe Co., Ltd. Quality Control

Quality Certifications

SMLSCO has a complete and strict quality management system, and all production and storage facilities have passed the following international authoritative certifications:

ISO Certification

All our factories have obtained ISO international quality management system certification, strictly implement international standards, and ensure stable and reliable product quality.

PED / AD 2000 Certification (European Pressure Equipment Directive)

Our seamless pipes, seamless tubes, flanges, and pipe fittings products all comply with PED / AD 2000 standards, meet the safety and quality requirements of the EU market, and are widely used in high-standard industrial engineering fields.

NORSOK M-650 Certification

Our flanges and pipe fittings products have passed the strict NORSOK M-650 standard certification, which is particularly suitable for extreme working conditions such as marine engineering, oil and gas, energy, and electricity, ensuring the long-term safe operation of products under harsh conditions.

Full-Process Quality Inspection System:

• Raw Material Inspection:
  A spectrometer (PMI) is used for chemical composition analysis to ensure that the quality of raw materials meets the standards.

• Process Quality Control:
  Strict wall thickness measurement, dimensional inspection, appearance inspection, and non-destructive testing (NDT) are implemented in the production process.

• 100% Pre-shipment Inspection:

  • Seamless Pipe & Tube:
    100% eddy current inspection, surface inspection, and photographing of each pipe for archiving.

  • Welded Fittings:
    100% radiographic inspection (RT) to ensure that the welds are intact and free of defects.

  • Forged Flanges & Fittings:
    Comprehensive dimensional inspection, hardness inspection, penetration inspection, PMI material re-inspection, NDT non-destructive testing, etc., complete records and full traceability.

All inspection processes and results are recorded, equipped with detailed quality inspection reports and inspection image data to ensure product traceability, so that customers can purchase with confidence and use with peace of mind.