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214 Gas Purification

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Table 3-5
Recommended Maximum Amine Solution Piping Velocities
for Rich and Lean Amine Solutions

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Velocity, dsec (fthec) (Note 1)
I Amine Rich Solution Lean Solution Reference
All 1.8 (6) 1.8 (6) API, 1990
All 0.9 (3) 0.9 (3) Campbell, 1981
MEA 0.9 (3) 0.9 (3) Dingman et al., 1966
All 1.5 (5) - Dupart et al., 1993B
DEA (Note2) 1.0 (3.3) - Dailey, 1970
DEA (Note 2) 0.9 (3.0) - Smith and Younger, 1972
DGA 1.5 (5) 1.5 (5) Seubert and Wallace, 1985
All 0.6-1.5 (2-5) 0.6-1.5 (2-5) Manning and Thompson, 1991
Notes:
I. Figures also generally apply to heat exchanger tubing. However, Manning and Thompson (1991)
recommend a maximum tubeside velocity of 2 to 4ft/sec for leadrich exchangers where rich amine
is on the tubeside.
2. Recommended velocity applies only to rich DEAJowing through the tubeside of a leadrich
exchanger. Dailey (1970) and Smith and Younger (1972) report that severe corrosion occurred in
the tubes of a leadrich exchanger when the tubeside velocity exceeded 5.25ft/ec.

VAPOR VAPOR

STEAM

Figure 3-1 2. Recommended kettle reboiler dimensions and inlet and outlet piping
configuration to minimize carbon steel corrosion. Reproduced with permission from
Hydmaaon PmessinQ, April 1966. (Ballard, 1966)