Acid gas sweetening plants use various amine solvents (namely primary secondary and tertiary) to selectively remove impurities such as Hydrogen Sulfide (H2S) and or Carbon Dioxide (CO2) from natural gas.The most economical material is carbon steel with the exception of stainless steels and its cladding in areas where high severity of corrosion anticipated in amine treating plants. Change in feed composition operational upsets are not uncommon to amine plants will likely result abnormal corrosion rates in plant equipment and piping.Amine stress cracking in addition to wet H2S damage mechanisms is a known cracking degradation in the amine treaters. Often its detectability is questionable even with advance NDE techniques. The paper describes cracking phenomenon in Lean amine (DEA) exchangers made of carbon steel with post weld heat treatment and challenges to detect mitigate repair of defects and remedial measures.Key words: Gas sweetening amine solvent DEA carbon steel material amine stress corrosion cracking challenges crack detectability.