Vent gas water seal drum
Vent gas water seal drum
(OP)
We need to provide a water seal drum for a cold vent system. The drum size is 750 mm. Is it required to provide the manhole/ hand hole for the drum?
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RE: Vent gas water seal drum
API 521 (section 5.9) recommends handholes [DN 100 to DN 200 (NPS 4 to NPS 8) nozzles] to be present on the bottom of the drum to permit thorough cleaning. These nozzles should have DN 40 (NPS 1 1/2) or DN 50 (NPS 2) valves in the blind flange to permit complete draining of the vessels before opening. Read entire section 5.9 (API 521 6th edition) for complete information on other facilities that might be required (removal of hydrocarbons, drain, freezing protection etc.).
Also see https://law.resource.org/pub/in/bis/S08/is.3133.19...
Dejan IVANOVIC
Process Engineer, MSChE
RE: Vent gas water seal drum
RE: Vent gas water seal drum