EN 10204 Type 3.1 Inspection Certificate
A legally binding document validated by the manufacturer’s authorized inspection representative, completely independent of the manufacturing shopfloor. It confirms that delivered products meet all purchase order technical requirements based on specific inspection trials on the actual heat lot.
- Melt Heat Chemical Analysis: C, Si, Mn, P, S, Cr, Ni, Mo, Cu, V, N concentrations verified against ASTM/ASME specifications.
- Mechanical Properties: Tensile strength, 0.2% offset yield strength, elongation, and reduction of area per ASTM A370.
- Hardness Testing: Brinell (HBW) and Rockwell (HRC) values ensuring compliance with NACE MR0175 (≤ 22 HRC).
- Charpy V-Notch Impact: Full sub-zero impact joules report at -29°C, -46°C, or -196°C.
EN 10204 Type 3.2 Third-Party Certificate
The highest level of metallurgical assurance in European and international piping standards. Validated jointly by the manufacturer’s authorized inspection representative AND an independent third-party inspection agency (TPI) appointed by the purchaser or an official regulatory authority.
- Third-Party Witness: Accredited surveyors from DNV GL, Lloyd's Register, TÜV Rheinland, Bureau Veritas (BV), or SGS witness testing in person.
- Specimen Stamping: TPI inspects test coupons attached to raw castings/forgings and applies physical hard stamps before destructive testing.
- Hydrostatic Witness: TPI witnesses shell and seat pressure testing, stamping the valve body upon successful conclusion.
- Dual Endorsement: Both TSV QA Chief and TPI Surveyor sign and stamp the final MTR dossier.
Mechanical, Chemical & Metallurgical Examination
TSV’s internal physical and chemical testing laboratory is equipped with calibrated XRF alloy analyzers, optical emission spectrometers (OES), and ultrasonic flaw detectors verified annually by certified metrology institutes.
Direct-reading spectrometry and portable XRF analyzers ensure 100% Positive Material Identification (PMI) on raw castings, forgings, welding consumables, and machined stems.
ASTM E415 / E1086Equipped with liquid nitrogen immersion cooling chambers capable of testing impact toughness down to -196°C for LNG and cryogenic valve service.
ASTM E23 / ISO 148-1Full in-house ASNT Level II & Level III personnel for Radiographic Testing (RT), Ultrasonic Testing (UT), Magnetic Particle (MT), and Liquid Penetrant (PT).
ASME B16.34 App I-IVHuey, Strauss, and Streicher test protocols verifying that austenitic stainless and duplex stainless alloys are completely free from carbide precipitation.
ASTM A262 Practice EUnbroken Physical Traceability from Foundry to Jobsite
Casting heat number cast directly into valve body; forgings stamped at raw billet stage.
100% spectrometry verification against mill certificate before issuing to CNC machining line.
Low-stress round-nosed steel stamps transfer heat numbers onto machined flanges and bonnets.
Valve serial number linked to digital MTR, pressure chart, and NDE records in permanent archive.
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