third party inspection
3 in-depth engineering guides on third party inspection — specification, selection, testing and procurement.
Everything on third party inspection
Vajra's engineering team has published 3 technical guides covering third party inspection for industrial valve selection, specification, testing and procurement. Browse the full set below.
Factory Acceptance Testing (FAT) for Industrial Valves - API 598, ISO 5208 and Witness Testing Guide
Factory Acceptance Testing (FAT) verifies that every valve meets its specified pressure-temperature rating and leakage class before leaving the manufacturer's facility. API 598, ISO 5208, and EN 12266 define the test procedures - this guide covers what is tested, acceptable leakage limits, and how third-party witness inspection works.
Valve Testing and Inspection: API 598, ISO 5208, Hydrostatic & Seat Tests
Every industrial valve must pass mandatory pressure tests before despatch - but the test pressures, durations, and acceptance criteria differ significantly between API 598 and ISO 5208. This guide explains hydrostatic shell tests, seat leakage tests, backseat tests, TPI (third-party inspection) requirements, and the full documentation package expected for critical service valves.
Valve Certification and Material Traceability for Critical Service Applications
When a valve fails in a critical service - high-pressure steam, sour oil and gas, nuclear, or toxic chemical service - the consequences extend far beyond the cost of replacement. Proper material certification and end-to-end traceability from mill certificate to installed component is the foundation of process safety. This guide explains the complete certification chain, what documents to demand from suppliers, and how to verify them.
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