Situation Analysis
MONITORING EXAMPLES

As producing zones deplete and secondary recovery methods such as water injection are used, there is a greater probability of increased corrosion activity. At normal temperatures, corrosion occurs where water is in contact with metal surfaces. Corrosion localizes where water drops out of the flowing stream because of flow conditions and system geometry.

Top Mounted Top of Line, Half in Flow, Half in Dead Product Area
	Single Coupon or Probe -Used in Low Flow, Low Pressure systems -Measures Condensation- Related Corrosion -Product Sample Valves may be used
	Coupon and Probe -Probe allows Data Collection In Situ -Coupons provide Physical Evidence of Corrosion Mechanism -Two Techniques used for Comparison / Validation

Bottom Mounted Bottom of Line
	Single Coupon or Probe -Coupon/probe mounted flush with inner wall -Location where most Failures originate -Product Sample Valves may be used
	Coupon and Probe -Probe allows Continuous Undisturbed monitoring -Coupons provide Physical Evidence of Corrosion Mechanism -Two Techniques used for Comparison / Validation

3-Phase Monitoring with Trap Top, Middle and Bottom of Line Areas
	Multiple Coupons or Probe -Coupons in Dead, Flowing and Water Trap Areas -Probe monitors One area/phase -Trap is “Worst Possible Case” monitoring -Product Sample Valves may be used
	Multiple Coupons and Probe -Probe allows Data Collection In Situ -Coupons provide Physical Evidence of Corrosion Mechanism -Two Techniques used for Comparison / Validation

Specialized Traps (New Projects) Bottom of Line
	Single Coupon or Probe -Non Hot-Tapable “L” Trap -Liquid / Sludge Trap -Worst Case monitoring -Product Sample Valves may be used
	Coupon and Probe -Non Hot-Tapable Cross Trap -Probe allows Continuous Undisturbed monitoring -Coupons provide Physical Evidence of Corrosion Mechanism -Two Techniques used for Comparison / Validation

Specialized Traps (Existing Installations) Bottom of Line
	Single Coupon or Probe -Hot-Tapable “L” Trap -Liquid / Sludge Trap -Worst Case monitoring -Product Sample Valves may be used
	Coupon and Probe -Hot-Tapable Cross Trap -Probe allows Data Collection In Situ -Coupons provide Physical Evidence of Corrosion Mechanism -Two Techniques used for Comparison / Validation