Appurt

Module from the Storage Tank Engineering Curriculum curriculum.

Module 5 - Appurtenances · Learning Objectives · 1. Size shell nozzles per API 650 Table 5-6a/b reinforcement · 2. Specify gauging hatch, sample hatch, level gauges (servo, radar, displacer) · 3. Install roof vents: conservation vent (PVRV) + emergency pressure/vacuum · 4. Apply auto-gauging per IPE-EP-12-9-1 (tank gauging instrumentation) · 5. Provide manways per API 650 Sec 5.7 (shell manway, roof manway, 24 in typical) · Required Roof Vent Capacity (API 2000)

Flow Scenario	Formula	Value	Notes	Ref	Period
Normal outbreathing (fill)	B rate in/out	165 ft3/hr/ft3 flash	Thermal + filling	API 2000 4.1	Continuous
Normal inbreathing (empty)	B rate in/out	94 ft3/hr/ft3 flash	Thermal	API 2000 4.1	Continuous
Thermal breathing	f(D,H)	Proportional tank volume	Sun/nightfall	API 2000 Table 2	Continuous
Emergency venting (fire)	Q = 27,000 * A^0.82	Based on wetted area	Fire exposure	API 2000 Sec 5	Rare

Source: Storage_Tank_Engineering_Curriculum_v1.xlsx · Sheet: Appurt

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