Predict®Pipe 3.0

PredictPipe 3.0 addresses one of the most significant issues in pipeline corrosion evaluation - assessment of corrosion rates in dry gas transmission pipeline systems. These pipelines are exposed to corrosive environments due to water accumulation. The software package is instrumental in enabling easy and accurate Dry Gas ICDA procedures.

PredictPipe 3.0 is a by-product of years of corrosion research and modeling and provides access to a comprehensive knowledge base of corrosion decision-making. It is an easy-to-use graphical tool that integrates the effects of a complex set of environmental parameters to provide a corrosion rate assessment based on extensive literature data, lab testing and field experience.

PredictPipe 3.0: Identification of critical segments

Internal Corrosion Direct Assessment (ICDA)

Gas transmission pipelines under normal operating conditions carry under saturated gas processed by upstream dehydrating units. These pipelines are generally operated with no protection or inhibition and rely on the performance of the dehydrating units to process gas within acceptable standards. It is not unusual for some instability or other process perturbations to result in near saturated gas or some liquid water carryover in such pipelines. These upsets lead to water accumulation in some parts of the pipeline further downstream or cause water condensation due to pressure and temperature changes along the length of the pipeline.

Internal corrosion in pipelines is difficult to locate and measure due to a number of factors. Most internal corrosion detection measures require access to the inside of a pipe for inline inspection and visualization tools such as inline pigs with substantial portions of many pipelines not configured to allow inline inspection.

The ICDA approach to evaluate the likelihood of water accumulation and internal corrosion and identify critical zones, can enhance the actual measurement techniques and ensure safe operation of natural gas pipelines.

One identified by PredictPipe 3.0, a detailed inspection of critical locations where water would most likely accumulate provides the basis that integrity decisions for the remainder of the line can be made. If on inspection no corrosion is found, it is concluded that downstream corrosion is unlikely.

Benefits

• Using PredictPipe’s Advanced-ICDA technology, users can address internal corrosion in pipelines in a preemptive, proactive basis, and prevent costly failures
• Advanced-ICDA analysis for gas transmission pipelines through hilly terrain to identify problem zones and view predicted corrosion rate profile throughout the pipeline
• Determine segment critical angles and identify hot spots where water hold-up can occur
• Evaluate various glycol injection scenarios and assess effectiveness glycol injection
• State-of-the-art pH computation module that accounts for the effects of over 16 different anions and cations
• Ability to accurately model momentum transfer effects (flow regimes, void fractions, pressure drops and shear stresses) en-route to improved corrosion prediction
• Ability to accurately determine scaling effects due to formation of Iron carbonate and Iron sulfide scales as a function of temperature and pH
• Ability to accurately characterize role of oxygen concentration in corrosive systems
• Ability to handle different types of hydrocarbons and persistence effects
• Updated economic analysis for integrating economic factors into corrosion analysis

Source : http://hpsweb.honeywell.com/HPSWebII/SiteNavigator.aspx?Definition=InterCorr