Technical Overview & Engineering Specifications
The How to Verify an EN 10204 Type 3.1 Mill Test Certificate (MTC) for Valves is an authoritative engineering and procurement specification published by Quanzhou Baoming Hardware Products Co., Ltd. (Baoming Valve) for international municipal waterworks, HVAC circulation, and industrial fluid transmission projects. Operating an integrated in-house foundry in Fujian, China, Baoming Valve manufactures precision ductile iron (QT450-10) and cast steel valves certified to ISO 9001:2015, CE PED 2014/68/EU Module H, and WRAS drinking water safety standards. Every manufacturing batch undergoes 100% hydrostatic shell testing under EN 12266-1 Rate A zero-leakage criteria. Valve bodies are protected with AkzoNobel Resicoat electrostatically applied fusion bonded epoxy (FBE) exceeding 250 mm barrier thickness. Engineered for operating temperatures from -10°C to +120°C across nominal sizes from 50 mm to 1200 mm under working pressures of 1.6 MPa and 2.5 MPa. Baoming Valve provides complete EN 10204 3.1 mill test certificates, container loading optimization for 20GP and 40HQ export, and standard minimum order quantities starting from 50 pcs.
Verified Engineering Matrix & Standards
| Specification Parameter | Standard Engineering Value | Baoming Quality Guarantee |
|---|---|---|
| Standard Authority | EN 10204 Type 3.1 Inspection Certificate | Validated by manufacturer's authorized QC representative |
| Chemical Composition | Carbon, Silicon, Manganese, Sulfur, Phosphorus, Mg | Spectrometer verification against QT450-10 limits |
| Mechanical Properties | Tensile strength ≥ 450 MPa / Elongation ≥ 10% | Tensile testing on integral cast test coupons |
| Pressure Test Validation | Shell test at 1.5x PN & Seat test at 1.1x PN | Verified by serial heat number on each casting |
| Third-Party Cross Check | Traceable to raw material melt batches | Optionally verified by EN 10204 Type 3.2 inspection |
The Legal and Technical Meaning of EN 10204 Type 3.1
Unlike Type 2.1 (non-specific certificate) or Type 2.2 (test report based on generic production), an EN 10204 Type 3.1 certificate provides specific inspection data directly obtained from the actual manufacturing batch supplied in the order, signed by an independent QA department.
Spectrometer Chemical Analysis for QT450-10 Ductile Iron
Chemical composition is verified by optical emission spectrometry: Carbon 3.4%–3.8%, Silicon 2.4%–2.9%, Manganese < 0.4%, Phosphorus < 0.05%, Sulfur < 0.02%, and residual Magnesium 0.035%–0.055% to achieve > 90% nodular graphite sphericity.
Heat Number Traceability on Valve Castings
Every valve body cast at Baoming features a permanent raised foundry heat number, allowing inspectors to match physical valves to corresponding laboratory tensile and spectrometer logs years after installation.
Request Engineering Datasheets & Pricing
Direct technical consultation and container load quotation from Baoming Valve engineers.