Important: AMPP System Update February 27 - March 11 – Limited Access to AMPP Digital Services. Act Now to Avoid Disruptions! - Learn More
Corrosion Under Insulation (CUI) is a very serious problem impacting the oil and gas, petrochemical, power and heavy industries. Due to the high costs associated with CUI, many industries have begun abandoning conventional jacket insulation. Recent advancements in trade association standards have helped engineers select, apply and inspect different types of insulative coatings in lieu of conventional jacket insulation.
We are unable to complete this action. Please try again at a later time.
If this error continues to occur, please contact AMPP Customer Support for assistance.
Error Message:
Please login to use Standards Credits*
* AMPP Members receive Standards Credits in order to redeem eligible Standards and Reports in the Store
You are not a Member.
AMPP Members enjoy many benefits, including Standards Credits which can be used to redeem eligible Standards and Reports in the Store.
You can visit the Membership Page to learn about the benefits of membership.
You have previously purchased this item.
Go to Downloadable Products in your AMPP Store profile to find this item.
You do not have sufficient Standards Credits to claim this item.
Click on 'ADD TO CART' to purchase this item.
Your Standards Credit(s)
1
Remaining Credits
0
Please review your transaction.
Click on 'REDEEM' to use your Standards Credits to claim this item.
You have successfully redeemed:
Go to Downloadable Products in your AMPP Store Profile to find and download this item.
CUI (corrosion under insulation) is a pervasive, difficult and high-liability issue for petrochemical, power, shipping, and other industries. Situational variations (meteorological, geographical, seasonal, etc.) can confound conventionally specified surface preparation attempts to achieve perfect or near-perfect metal hygiene, thus reducing expected coating life by 30 to 75 percent. Because conventional surface preparation processes have historically been unable to adequately relieve microcontamination of metal surfaces, organizations have settled for an uneasy balance between economic and physical feasibilities that exclude the possibility of achieving ideal surface preparation outcomes and rely more heavily upon barrier coatings to supply needed corrosion control.
It is fair to say that maintenance in the worldwide oil and gas industry has changed dramatically over the past ten years. Facility owners are more than ever looking to reduce shutdown times, to improve plant efficiency and to extend plant lifetimes. With this comes the increased industry understanding about corrosion under insulation (CUI) with its deleterious impact and the ongoing desire for pragmatic high performance and cost-effective coating solutions.
A laboratory investigation of corrosion under insulation (CUI) using methods given in ASTM G189 for cyclic temperature, wet/dry conditions. Two long term exposure tests of three material conditions and two insulative materials (mineral wool and calcium silicate insulations).
Case studies of corrosion under insulation (CUI), identifying the key contributory factors within each example and discussing the limitations of the first pass desktop approach. Experience has verified that intimate knowledge of the system in question can greatly increase the probability of success and reduce risks.
Electrochemical and slow strain rate tests were done to demonstrate the protective ability of a thermal sprayed aluminum coating to prevent chloride stress corrosion cracking of TP304L SS in aqueous chloride solutions. Mitigation methods.
The paper will present measurements of water repellency properties of different mineral wool products, with different types of treatment, as well as the effect on corrosion, when the different insulation materials are employed in a simple corrosion test.
Polysiloxane is an inorganic compound with stability vs. organic compounds. Inorganic formulation, elevated temperature polysiloxane coatings for CUI mitigation, true air dry, weather resistance without baking, ultra-high-build spray-on insulation.
Laboratory testing of polysiloxane based materials confirms much higher temperature tolerances than acrylic spray-on products and insulation performance nearly equal to traditional block, batt and mat-type insulation materials.
In industrial plants such as oil & gas and chemical plants, the plant piping is covered with insulative materials such as mineral wools and metal cladding for thermal insulation. The piping under insulation is subject to more severe corrosive environment than that exposed to the outdoor, due to rainwater entering through the cladding joints and condensation caused by temperature fluctuation. In addition, since the piping is covered with the insulation materials, it is impossible to identify the corrosion from the outside, increasing the risk of leakage accidents due to delays in corrosion mitigations.
Integrity management of corrosion under insulation (CUI) has historically and continues to be one of the biggest corrosion related challenges within the oil & gas, maritime, chemical and petrochemical industries.2 Corrosion of piping, associated flanges, pressure vessels and structural components from CUI is a commonly found phenomenon and if left undetected or not stringently managed can result in catastrophic leaks or explosions, equipment failure and periods of prolonged downtime due to repair or replacement. It is estimated around 40% to 60% of an operator’s pipeline maintenance budget is a result of CUI.3
This AMPP standard test method provides a comprehensive methodology to evaluate the relative performance of coatings in accelerated and simulated field conditions under insulation. This test method is intended for use by corrosion control personnel, design engineers, project managers, purchasing personnel, and construction engineers and managers. It is applicable to insulated piping and equipment in the oil and gas gathering, distribution, transmission, refining, and chemical industries.