The main environmental factors which may affect the equipment intended for use in explosive atmospheres at the ambient temperatures below −20 °C include, individually or in combination are:
• temperature;
• humidity;
• corrosive media;
• powder snow;
• precipitations, including snow;
• spray from waves;
• high winds;
• solar radiation; and
• mechanical effects.
If operational condition below -20C is met, better to be aware and check documentation.
Keep up good work!
My Ex personnel competence as an Ex manufacturer shall be measured by
The issue of hand-operated valves: Given that these will move slowly, with
Who is he / she? First a designer shall be a designer
Whenever you get delivered with a solution using Ex v, it can only be considered as an installation, assembly, project (other definitions I leave to you), and there shall be a design, installation, commissioning, Ex inspection, etc. all similar to normal project conditions.
#exprofessional
arpadveress 
