Product Overview

Pressure reduction in a gas station lowers temperature by roughly 0.5 to 0.6 C per bar, so first-stage stations need preheating to keep the gas above the hydrate point. CN and CF exchangers use a U-tube bundle with the gas inside the tubes and hot water in the shell, arranged for vertical installation.

Key Features

• Duty range 60 to 2000 MJ/h (14500 to 485000 kcal/h)

• Gas side maximum inlet pressure 90 bar, ANSI CL600 flanged connections

• Water side design pressure 5 bar, PN6 connections, maximum water temperature 90 C

• U-tube (BEU) bundle with inspection facility, gas in tubes, water in shell

• CN natural circulation and CF forced circulation configurations

Typical Applications

Preheating before first-stage reduction in city gate and transmission stations, LNG and LPG vaporizer outlet heating, and any gas station where the expanded gas would otherwise fall below the hydrate point.

Selection Guide

Size the exchanger from the gas flow, the pressure drop across the station and the required outlet temperature, keeping the gas above 5 C after reduction. Choose CF forced circulation when the water circuit cannot deliver the natural circulation head required by a CN unit.