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Subject: WET LAYUP PROCEDURE tech. Пожалуйста, помогите перевести.WET LAYUP Выражение встречается в следующем контексте: If extensive oxygen-related corrosion during outage conditions is to be avoided, proper layup methods are essential. The interior surfaces of HRSG components must be kept free of moisture (water) or oxygen since the simultaneous presence of both moisture and oxygen is required for this corrosion to occur. Layup has been defined for two conditions; wet and dry, and for two durations, short and long. A short outage is defined as any period where the HRSG is out of service for up to four days. A long outage is defined as any period where the HRSG is out of service for more than four days. For dry layup, the most effective and practical means for excluding oxygen is to maintain an overpressure of nitrogen. For wet layup, protection against corrosion is provided by an amine (e.g. ammonia) for pH control. A nitrogen overpressure is also established and maintained to preclude oxygen ingress. Tables 1 and 2 below summarize the Company’s recommended layup procedures for drum-type HRSGs. These layup procedures are intended to be general guidelines for minimizing corrosion of HRSG components under outage conditions. Plant-specific circumstances may dictate alternative layup measures. Заранее спасибо |
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