Fugitive Emission Control (FEC)
Improperly sealed valves are responsible for hundreds of tonnes of fugitive emissions each year. This has significant implications for the environment, but there are also major legislative and cost-saving pressures on controlling fugitive emissions more effectively.
FTL braided packing and gasket solutions are at the cutting-edge of material technology in this field, offering the optimal combinations of sealing components to cut fugitive emissions to an absolute minimum, whatever your specific operating environment may be.
FTL have engineered a combination of sealing elements as part of an custom FEC kit. These FEC kits combine the extrusion resistance of mechanical packing with the advantages of a high performance elastomer seal. Our FEC kits are customised to the precise requirements of your application.
Applications for FEC kits include valve OEMs and MRO for oil and gas, as well as food, pharmaceuticals and chemical processing.
FEC Sealing Sets: The Benefits
- Meet safety obligations and regulations more efficiently
- Minimise economic losses due to gas or other product leaks
- Increased environmental responsibility
Tailored Sealing Solutions
FTL positions itself as the partner of choice for fully customised, engineered sealing solutions using the latest sealing technologies. Following onsite technical surveys to determine the scope and scale of your requirements, FTL will create a fugitive emission control sealing system which is both technically and commercially viable.
All FTL fugitive emission control products conform to TA Luft legislature, and are compliant with ISO 15848, API 589 and API 622.
*FTL Packings comply with the above certifications. For specific grades, contact an application engineer.
| Product | Product Reference | Pressure [Bar] | Speed [m/s] | Temperature [°C] | pH Resistance | Approvals | Material |
|---|---|---|---|---|---|---|---|
 |
0090 | NBR PUR |
1 | 1 | 1 | 1 | -30 to +100 -40 to +110 |
 |
0090 | NBR PUR |
1 | 1 | 1 | 1 | -30 to +100 -40 to +110 |
 |
0090 | NBR PUR |
1 | 1 | 1 | 1 | -30 to +100 -40 to +110 |
 |
0090 | NBR PUR |
1 | 1 | 1 | 1 | -30 to +100 -40 to +110 |
 |
0090 | NBR PUR |
1 | 1 | 1 | 1 | -30 to +100 -40 to +110 |
Fugitive Emissions Standards
ISO 15848
ISO 15848 regulation describes measurement, test and qualification procedures for fugitive emissions of industrial valves. The regulation is separated into ISO 15848-1 and ISO 15848-2. ISO 15848-1 is a classification system and a qualification procedures for type testing of valves. ISO 15848-2 specifies production acceptance test of valves for valve manufacturer.
ISO 15848 Tightness Classes
Grade A (Helium only) | Measured leakage rate: ≤ 10− mg / (s × m) | Typically achieved with bellow seals or equivalent spindle / shaft gasket system for swivel valves
Grade B | Measured leakage rate: ≤ 10− mg / (s × m) | Typically achieved with packing system based on PTFE or elastomer materials
Grade C | Measured leakage rate: ≤ 10− mg / (s × m) | Typically achieved with packing on flexible graphite basis
TA-LUFT (VDI 2440)
The German Fugitive Emission Control Legislation refers in TA-Luft regulation to VDI 2440 for defining leakage rates, test and measuring methods.
Flange Connections - According to TA-Luft and VDI 2440 flange connections must comply with maximum leakage rate of 10- mbar × l (s × m) at test pressure of 1 bar. VDI 2200 defines the selection, calculation, design and assembly of bolted flange connections as well as test procedures and refers to VDI 2440 regarding permissible leak rates. VDI 2200 also defines criteria for “Blowout” safety test for gaskets. The aim of this Blow-out test is to avoid a sudden leakage through seal burst.
Maximum leak rates according to VDI 2440*
Temperature: < 250°C | Measured leakage rate: ≤ 10- mbar × l / (s × m)
Temperature: ≥ 250°C | Measured leakage rate: ≤ 10- mbar × l / (s × m)
*for harmful VOC’s (Volatile Organic Compounds) for valves
API 622
API 622, 2nd Edition is an international performance test for packing materials considering several factors such as temperature, pressure, thermal and mechanical cycling. 2nd Edition of API 622 defines 1510 mechanical cycles and 5 thermal cycles. High temperature tests shall be performed from ambient temperature to 260°C (500 °F) and pressures from 0 to 600 psig (0 – 41 barg). Permissible leakage level is 100 ppm with test medium methane.
API 624
First edition of API 624 is a type testing of rising stem valves equipped with graphite packing for Fugitive Emissions. The standard covers rising and rising-rotating stem valves up to 24“ diameter and has to be performed at original valves. The test procedure requires 310 mechanical cycles and three thermal cycles to 260°C (500 °F). Allowable leakage is 100 ppm maximum. It requires that the tested valve packing be previously tested according to API 622 and be suitable for use at service temperatures –29°C to +538°C (–20 °F to 1000 °F).
API 589 (fire safe)
Not a FEC standard, API 589 covers the requirements for testing valve stem packing and evaluating its performance when exposed to specifically defined fire conditions. Packing may be a combination or an arrangement of more than one material. The test procedure in this standard simulates circumstances that impose severe demands on valve stem packing.