LDAR (Leak Detection and Repair)
A regulatory programme (EPA Method 21 in the USA; EU IED in Europe) requiring periodic monitoring of valves, pumps, and flanges for fugitive hydrocarbon emissions, followed by repair when emissions exceed thresholds. Low-emission valves (ISO 15848 Class A) minimise LDAR repair frequency.
Related Terms
Applicable Standards
Industrial Valves - Measurement, Test and Qualification Procedures for Fugitive Emissions - Part 1
ISO 15848-1 specifies measurement, test, and qualification procedures for fugitive emissions from industrial valves.
API 624 - Type Testing of Rising and Setting Stem Valves Equipped with Graphite Packing for Fugitive Emissions
API 624 extends API 622 by specifying complete valve-level fugitive emissions type testing for gate and globe valves equipped with graphite packing - a valve-level certification complementing the packing-level API 622 test.
Frequently Asked Questions
What is LDAR (Leak Detection and Repair)?
A regulatory programme (EPA Method 21 in the USA; EU IED in Europe) requiring periodic monitoring of valves, pumps, and flanges for fugitive hydrocarbon emissions, followed by repair when emissions exceed thresholds. Low-emission valves (ISO 15848 Class A) minimise LDAR repair frequency.
What are the acceptance criteria for LDAR (Leak Detection and Repair)?
Acceptance criteria depend on the applicable standard. API 598 and ISO 5208 define leakage rate classes from zero (Rate A) to defined allowable drops (Rate D/F) based on valve size and test type. For dimensional and visual inspections, ASME B16.34 and the applicable valve standard define tolerances. Vajra Industrial Solutions provides full inspection documentation including shell test, seat leakage test, and dimensional check records.
What documents does Vajra provide for valve quality?
Vajra Industrial Solutions supplies valves with: (1) Material Test Certificates (MTC) per EN 10204 Type 3.1 for all pressure-retaining components, (2) Hydrostatic test reports to API 598 or ISO 5208, (3) Dimensional inspection certificates, (4) PMI (positive material identification) reports for alloy valves, and (5) Third-party inspection (TPI) by SGS, Bureau Veritas, Intertek, or TPIA as required. Contact sales@vajravyuh.com for a sample documentation package.
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