Vent Function

Storage tanks, process vessels, and relief systems generate vapors requiring safe atmospheric discharge. Cold vents handle non-combustible or below-flammable-limit gases at ambient or reduced temperatures. Stack elevation disperses vapors above grade preventing ground-level accumulation and meeting air quality setback requirements from property lines and personnel areas.

Stack Design

Vertical pipe construction with appropriate height based on dispersion modeling typically 3-15 meters. Weather cap prevents rain ingress while allowing vapor discharge. Flame arresters on hydrocarbon service prevent external ignition sources from flashback. Condensate drains at base remove moisture accumulation. ERGIL sizes stacks for vapor flow rate, dispersion requirements, and wind loading.

Material Selection

Carbon steel or stainless steel construction suitable for vapor composition and atmospheric exposure. Materials resist corrosion from moisture, acids, or trace contaminants. Coatings protect against weather. Design accommodates thermal contraction from cold vapor discharge and ambient temperature cycling.

Applications

Storage tank normal breathing vents, process vessel atmospheric vents, safety relief valve tailpipes, glycol regenerator overhead discharge, compressor blowdown vents, and nitrogen purge discharge. Serves facilities requiring safe low-temperature vapor disposal across refineries, terminals, chemical plants, and gas processing operations.

Safety Features

Flame arresters prevent external fire propagation into flammable vapor systems. Weather caps exclude rain and debris. Drainage prevents liquid accumulation and freeze damage. Guy wires or structural supports resist wind loads. Proper elevation ensures vapor dispersion above occupied areas.

Design Considerations

Height determination through dispersion modeling ensures ground-level concentrations meet regulations. Diameter sizing prevents excessive backpressure affecting upstream equipment. Structural design for wind, ice, and seismic loads. Foundation requirements based on soil conditions and stack height.

Performance Benefits

Safe atmospheric vapor discharge protecting personnel from ground-level exposure. Prevents vapor accumulation in equipment areas. Weather protection maintains system integrity. Simple passive operation requires no utilities or controls. Proven technology meeting environmental and safety requirements.

Construction Standards

Design per applicable building codes and API 2000 for tank venting. Flame arresters per API 2028 or ISO standards. Structural calculations for wind and seismic per ASCE. Materials suitable for atmospheric exposure. Complete documentation with dispersion analysis supporting air permit compliance.

ERGIL cold vent stacks deliver dependable atmospheric vapor discharge ensuring safe dispersion and regulatory compliance in storage and process venting applications.