Manufacturers and end users should consider how this standard will affect their business.
04/22/2015
Many industries are interested in reducing fugitive emissions. Several standards and end user efforts work toward this goal:
- International Organization for Standardization (ISO) 15848 Measurement, test and qualification procedures for fugitive emissions
- Part I – Classification system and qualification procedures for testing of valve types
- Part II – Production acceptance test of valves
- American Petroleum Institute (API) 622 Type Testing of Process Valve Packing for Fugitive Emissions
- API 624 Type Testing of Rising Stem Valves Equipped with Graphite Packing for Fugitive Emissions
- End user defined fugitive emission reduction requirements
![Results of an anonymous survey of end users concerning their adoption of API 624](/sites/default/files/0415/Fluor-Table1.jpg)
- The number of cycles on some valves could damage packing, because some smaller valves do not include grease ports to keep the stem consistently lubricated.
- Failures of valve stem threads, yokes and glands can occur during testing.
- Grease is sometimes trapped in the packing, causing leakage.
- A few greases create volatile organic compounds and burn-off at higher temperatures.
- Testing in vertical orientation generates more heat in the yoke area.