Sino East Steel Quality Control Process
At Sino East Steel, quality is not just a department—it is our core philosophy. We implement a multi-stage Quality Management System (QMS) to ensure 100% compliance with international standards and customer specifications.
1. Raw Material Inspection
Before production begins, all incoming steel strips and coils undergo comprehensive testing:
- Chemical Analysis: Verification of Carbon, Manganese, Sulfur, and Phosphorus content using optical emission spectrometers.
- Mechanical Testing: Tensile strength and yield strength testing to ensure the base material meets grade requirements (e.g., Q235, Q355, Grade B).
- Dimensional Accuracy: High-precision measurement of strip thickness and width.
2. In-Process Quality Control (IPQC)
Our technicians monitor the production line 24/7 to catch potential issues early:
Welding Integrity: For ERW pipes, we perform continuous ultrasonic testing on the weld seam to detect any internal defects.
Surface Finish: Visual and manual inspection for scratches, pits, or uneven coating during the galvanizing process.
Zinc Coating Measurement: Use of magnetic gauges to verify that zinc coating thickness meets the required g/m² specification.
3. Laboratory Testing Methods
Our in-house lab is equipped with state-of-the-art testing equipment to conduct the following:
- Hydrostatic Testing: Every pressure pipe is tested to ensure it can withstand specified internal pressures without leakage.
- Tensile & Bend Tests: Destructive testing to confirm the ductility and structural integrity of the finished product.
- Impact Testing: Ensuring the steel maintains performance in low-temperature environments.
- Eddy Current Testing: Non-destructive testing to find surface and near-surface irregularities.
4. Pre-Shipment Inspection
Final inspection covers packaging, marking, and loading. We provide Mill Test Certificates (MTC) according to EN 10204 3.1 for every shipment. We also welcome third-party inspections from SGS, BV, TUV, and Intertek to provide additional peace of mind for our international clients.
Our Quality Commitment
Our "Zero-Defect" policy ensures that every piece of steel leaving our factory is ready for immediate use in construction, infrastructure, or industrial projects.
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