ISO 15848 : Guichon Qualifies its Valves for Fugitive Emissions

1/ The Context

According to CETIM : « In the petrochemical industry, industrial valves are considered as the primary source of VOC fugitive emissions. Over the past several years, standards, user specifications or regulations have proposed procedures (type tests and production test) aiming to characterise and qualify the performance of valves or tightness systems of the valve stem (gland/stuffing-box tightness).»

With tougher environmental regulations targeted to measure VOC atmospheric emissions in the industrial sector, and the observation that industrial valves are considered as the main source of fugitive emissions, measures must be taken by valve manufacturers.
Guichon, in the interest of both performance and environmental protection, has decided to qualify their valves so that they can offer highly leak-proof process/atmosphere products to their customers.

2/ The Approach

Standards taken into account : EN ISO 15848-1 & 2 and the SHELL 77/300 (2008) procedure
Product group : piston valves type 606 – 6’’ – Cl600

The ISO standard concerns the qualification of shut-off valves and control valves with respect to fugitive emissions. It defines the Tightness Class and endurance class (thermal and mechanical cycling). The recommended leakage measurement for the gland packing in the type testing is a measurement of the total leakage rate using the vacuum method. The test fluid is primarily helium.


Valve Design Qualification of a Prototype (ISO 15848-1 Standard) : Helium tests – February 2017

  1. Testing the prototype at operating pressures and temperatures
  2. Valve cycling (opening /closing manoeuvers)
  3. Vacuum measurements of the leakage rate of helium at the gland/stuffing-box

For this prototype, the test conditions were 205 operating cycles at 20°C, with leakage rate measurements taken every 50 cycles.

Results :

Leakage rate of 2.10-9 mbar.l.s-1.mm-1 which qualifies the piston valve as “rate A”
(the lowest leakage rate imposed by the standard).
= Leakage equivalent to the volume of a thimble of 1 cm3 over a total period of 16 years

 

Qualification of Piston Valves DN 3’’ to 12’’, Class 600 & lower.

Success Factors :

  • Accompaniment by Cetim : tests carried out in their laboratory
  • Preliminary engineering study of the choice of gland packing rings (composition, quality, impact on the design)
  • Synergy with SNRI (Valco Group), for test recommendations and design

fugitive-emissions-guichon-valves-iso-15848

fugitive emission test guichon valves industrial valves

fugitive emission test guichon valves industrial

Qualification of Production Valves (ISO 15848-2 Standard) – March 2017

  1. The valve is subjected to 6 bars of hélium
  2. Sniffing at the gland level
  3. The valve is opened and closed 5 times
  4. Stiffing at the gland level
Validated with success !

fugitive-emission-helium-sniffing-guichon-valves

3/ Customer Advantages :

Guichon’s piston type 606 valves guarantees quality against fugitive emissions:

  • respect the environment ;
  • improve health and safety problems ;
  • improve productivity of installations ;
  • reduce the impact of ageing on industrial installations ;
  • reduction of product loss (economic advantage).

 

Sources :

  • « Fugitive Emissions of Industrial Valves : “Update on standardisation and testing methods” », Cetim
  • « Directive n° 2010/75/UE relative to industrial emissions », European Union