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51313-02212-Chemical Compatibility of Composite Repairs in Refineries and Petrochemical Processing Facilities

Product Number: 51313-02212-SG
ISBN: 02212 2013 CP
Author: Larry Deaton
Publication Date: 2013
$0.00
$20.00
$20.00

Glass fiber reinforcements play a critical role in the implementation of a Fiber Reinforced Polymer (FRP) piping repair in a hostile environment. In a corrosive environment gaseous or liquid chemicals can penetrate the fibers through the resin matrix and cause premature failure by multiple means including poor curing diffusion osmosis embrittlement micro-cracking and swelling of the repair or reinforcement. As a result the choice of glass fiber type as well as the binding epoxy resin is critical to provide the longest life ensure the best corrosion performance and minimize the risk of repair failure. This paper presents the findings of a series of experiments that was conducted to identify the resistance of novalac based epoxy and E-glass fabric commonly used in FRP repairs and reinforcements of steel pipes transporting an array of chemicals used in the petrochemical refining industry. Coupons were tested in a variety of chemicals acids and solvents commonly used in the oil refining industry to evaluate their resistance to attack. Pre- and post-soak tensile tests are compared to evaluate the effect of the chemicals on the repair strength. Recommendations are made on the suitability of utilizing novalac based epoxy for the selected applications. Chemical resistance testing was performed per ASTM 543 standards and tensile testing was performed in accordance with ASTM 3039.

Presented by: NRI - Larry Deaton Ph.D. P.E.

Glass fiber reinforcements play a critical role in the implementation of a Fiber Reinforced Polymer (FRP) piping repair in a hostile environment. In a corrosive environment gaseous or liquid chemicals can penetrate the fibers through the resin matrix and cause premature failure by multiple means including poor curing diffusion osmosis embrittlement micro-cracking and swelling of the repair or reinforcement. As a result the choice of glass fiber type as well as the binding epoxy resin is critical to provide the longest life ensure the best corrosion performance and minimize the risk of repair failure. This paper presents the findings of a series of experiments that was conducted to identify the resistance of novalac based epoxy and E-glass fabric commonly used in FRP repairs and reinforcements of steel pipes transporting an array of chemicals used in the petrochemical refining industry. Coupons were tested in a variety of chemicals acids and solvents commonly used in the oil refining industry to evaluate their resistance to attack. Pre- and post-soak tensile tests are compared to evaluate the effect of the chemicals on the repair strength. Recommendations are made on the suitability of utilizing novalac based epoxy for the selected applications. Chemical resistance testing was performed per ASTM 543 standards and tensile testing was performed in accordance with ASTM 3039.

Presented by: NRI - Larry Deaton Ph.D. P.E.

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