{"id":6584,"date":"2019-11-21T14:30:50","date_gmt":"2019-11-21T19:30:50","guid":{"rendered":"https:\/\/assuredautomation.com\/news-and-training\/?p=6584"},"modified":"2023-02-15T14:22:43","modified_gmt":"2023-02-15T19:22:43","slug":"fugitive-emissions-valve-regulations","status":"publish","type":"post","link":"https:\/\/assuredautomation.com\/news-and-training\/fugitive-emissions-valve-regulations\/","title":{"rendered":"Fugitive Emissions & Valve Regulations"},"content":{"rendered":"\n

What are Fugitive Emissions?<\/h2>\n\n\n\n

Fugitive emissions or FEs refer to the unintended release of environmentally harmful gases or vapors from industrial activities or facilities. It is estimated that 51% of these fugitive emissions have been attributed to valves. <\/p>\n\n\n\n

In a typical facility most emissions are from valves and connectors, the most prevalent components, which often number in the thousands. Seal or gasket failure due to normal wear or improper maintenance is the major cause of these valve emissions. <\/p>\n\n\n\n

Besides contributing to the loss of salable product, fugitive emissions pose a risk to the health and safety of workers as well as to the surrounding communities. <\/p>\n\n\n\n

A Short Overview of Fugitive Emission Regulations<\/h2>\n\n\n\n

In October 1948, the mill town\nof Donora, Pennsylvania was covered by a toxic smog unintentionally released by\nthe local steel manufacturing facilities. <\/p>\n\n\n\n

After 5 days, the toxic gases\nresulted in the sickening of thousands and death of 20 in the community. Now\nconsidered one of the worst air pollution disasters in the nation\u2019s history, the\n\u201cDonora Incident\u201d demonstrated the need for air pollution control and lead to\nthe creation of the first clean air programs in the US. <\/p>\n\n\n\n

In response to worsening\nindustrial pollution the Environmental Protection agency<\/a> (EPA) introduced the US Clean Air Act, the first federal\nlegislation regarding air pollution control. Since that time increasingly stricter\nair pollution policies have been implemented at the US Federal and State\nlevels. <\/p>\n\n\n\n

Germany also began instituting\nair pollution control regulations in 1964 titled “Technical Instructions\non Air Quality Control” (Technische Anleitung zur Reinhaltung der Luft<\/em>)\ncommonly referred to as the TA Luft<\/strong>.\n<\/p>\n\n\n\n

During\nthe late 1980s, EPA legislation was amended to include petroleum refineries and\nchemical processing plants that emit volatile organic compounds (VOC\u2019s) and\nhazardous air pollutants (HAPs). The agency began conducting audits in hopes that\ncompanies would willingly implement emissions reductions.<\/p>\n\n\n\n

In order to\nreduce the emission of fugitive VOCs and HAPs, the EPA instituted Leak\nDetection and Repair (LDAR) regulations<\/a>, a system of procedures a facility\nutilizes to locate and repair leaking components which includes EPA\nMethod 21<\/a>, a method for determining VOC leaks from process equipment in\nparts per million. EPA Method 21 pertains to valves, flanges and other\nconnections, pumps and compressors, pressure relief devices, process drains,\nopen-ended valves, pump and compressor seal system degassing vents, accumulator\nvessel vents, agitator seals, and access door seals.<\/p>\n\n\n\n

By the late 1990\u2019s, the EPA determined that\nmany facilities were under-reporting emissions, failing to implement Method 21\nsufficiently to meet emission reduction targets. <\/p>\n\n\n\n

It was estimated that 40,000 tons of VOCs were being emitted annually from valves of petroleum refineries alone. By the early 2000\u2019s many refineries agreed to implement official LDAR Programs to avoid litigation. <\/p>\n\n\n\n

Fugitive Emissions Valve Standards<\/h2>\n\n\n\n

When facilities\ndo not meet the EPA\u2019s Clean air requirements, consent decrees are negotiated with\nthe manufacturing facility, typically resulting in the implementation of a formal\nLeak Detection and Repair (LDAR) program which implements Method 21 valve VOC monitoring.\n<\/p>\n\n\n\n

Currently, It\nis believed that 80% of fugitive emissions from valves are emitted through the\nvalve stem of linear valves (gates and globes) due to the rising\/rotating of\nthe stem through the packing system and the difficulty of proper sealing. <\/p>\n\n\n\n

As the EPA continues to refine its standards for the LDAR process there is a push that new valves used in refineries to be certified as \u201cLow E Technology\u201d. The EPA defines a Low E Valve as:<\/p>\n\n\n\n

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A valve (including its specific packing assembly) or valve packing for which the manufacturer has issued a written warranty that it will not emit fugitives at greater than 100 ppm, and that, if it does so emit at any time in the first five years, the manufacturer will replace the valve<\/em><\/p>\n<\/blockquote>\n\n\n\n

The push for \u201clow Emissions Valves\u201d and \u201clow Emissions Packing\u201d has prompted many standards organizations such as API, ANSI, ISO, MESC, ANSI and TA-Luft to establish valve and packing test standards which assess fugitive emission performance.  <\/p>\n\n\n\n

Examples of Fugitive Emissions valve standards:<\/strong><\/h3>\n\n\n\n

American Petroleum Institute Standards (API)\ncurrently has three valve\/packing emissions standards tests. <\/strong><\/p>\n\n\n\n