Approved Manufacturer List Inclusion (OMN-QAC-862-002 Rev R, Section 4)
Occidental Petroleum Corporation (OXY) operates some of the most critical upstream, pipeline gathering, and enhanced oil recovery (EOR) infrastructure in the United States, Oman, and worldwide. Qualifying for OXY’s corporate AVL requires meeting stringent metallurgical, zero-leakage, and traceability thresholds beyond standard industry requirements.
Audit Evaluation Result: TSV demonstrated 100% material compliance to NACE MR0175 / ISO 15156, digital chart recording for 100% hydrostatic shell and seat tests, and ISO 15848-1 Class AH low fugitive emission capability across ball and gate valve lines.
Four Key Audit Criteria Satisfied by TSV
Metallurgical Traceability
Full EN 10204 3.1 heat traceability back to primary foundry melt batches. Optical emission spectrometry (OES) chemical analysis and cryogenic Charpy impact verification on pressure boundaries.
Pressure Testing Integrity
Hydrostatic shell, seat, and low-pressure air tests monitored by computerized data loggers with dual pressure-transducer cross-validation to eliminate human measurement error.
NACE Sour-Service Control
Dedicated hardness testing protocol ensuring all wetted and bolting components remain below 22 HRC per NACE MR0175, preventing sulfide stress cracking (SSC) in high-H2S wells.
Capacity & Machining Power
Over 50,000 m2 of combined manufacturing space across Wenzhou and Qingtian bases equipped with heavy CNC vertical lathes, horizontal boring mills, and automated welding lines.
Approved Valve Product Scope Under OXY Specification
| Valve Type | Design Standard | Size Scope | Pressure Class | Approved Body Metallurgy |
|---|---|---|---|---|
| Trunnion Mounted Ball Valves | API 6D, ASME B16.34 | NPS 2" to 48" | Class 150 - 2500 | A216 WCB/WCC, A352 LCC/LCB, A105N, A350 LF2, F51 Duplex |
| Through-Conduit Slab Gate Valves | API 6D | NPS 2" to 36" | Class 150 - 1500 | WCB, LCC, A105N, LF2 (Piggable Full-Bore) |
| Dual Plate Wafer Check Valves | API 594 | NPS 2" to 36" | Class 150 - 2500 | WCB, CF8M, Duplex F51, Inconel 625 Spring |
| High-Pressure Forged Gate/Globe/Check | API 602, ASME B16.34 | NPS 1/2" to 2" | Class 800 - 2500 | A105N, A350 LF2, F316/F316L, F11, F22 |
Request Official Certifications, Test Records, or Audit Review
Need certified copies of API 6D licenses, OXY vendor approval records, hydrostatic test charts, or an EN 10204 3.1/3.2 MTR sample? Submit your specification or inquiry below. Our quality engineering team responds within 24 hours.
Occidental Petroleum Oman Delegation Factory Assessment
During formal qualification, Occidental Oman technical auditors visited TSV manufacturing bays in person. The assessment encompassed deep verification of CNC turning accuracy, raw material chemical spectroscopy (OES), non-destructive testing (NDT), and computerized hydrostatic shell testing under API Spec 6D.