Materials Performance Supplements

Corrosion Management for Pipeline Integrity 2018

Materials Performance is the world's most widely circulated magazine dedicated to corrosion prevention and control. MP provides information about the latest corrosion control technologies and practical applications for every industry and environment.

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10 JUNE 2018 W W W.MATERIALSPERFORMANCE.COM CORROSION MANAGEMENT FOR PIPELINE INTEGRIT Y SUPPLEMENT TO MP GPT Industries 4990 Iris St. Wheat Ridge, CO 80033 Tel: +1 303-988-1242 Web site: Conditions have been changing in the oil and gas industry over the last 50 years, and this has had a significant effect on pipelines. Isolation products have also struggled to keep up with the changing conditions. The "go to" isolation products were almost always based on a glass-reinforced epoxy (GRE) isolation system. However, increasing pressures and temperatures, as well as rising levels of hydrogen sulfide (H 2 S) and carbon dioxide (CO 2 ) from deeper and more aggressive drilling, are causing traditional GRE products to become vulnerable over time. GRE isolation gaskets also tend to be two to three times thicker than traditional ⅛-in (3-mm) gaskets used in piping systems, which has made installation challenging when flange gaps are less than desired. Fire safety is now a highly desired attribute in isolation products, but because GRE perishes in a fire, expensive work-arounds from a design standpoint have been the only option up to this point. GRE also has significant perme- ation issues that have plagued these gaskets and presented addi- tional challenges in regards to achieving tighter emissions require- ments. Although GRE was once an excellent material choice for isolation, it has become very apparent that an innovative new prod- uct is needed to help protect the world's aging oil and gas pipeline infrastructure. Consequently, GPT engineers set about designing an isolation system that would be chemically compatible with H 2 S, CO 2 , and steam mediums (among others); would be resistant to higher pres- sures; would eliminate permeation; would be ⅛-in thick; and would be fire safe. The engineering team was highly successful with the development of EVOLUTION™, a fully encapsulated Type 316L stainless steel isolating gasket that has the highest level of dielectric strength on the market. EVOLUTION™ has abrasion and impact resistance unlike any coated product seen in the piping industry thanks to a proprietary coating that has been specifically modified to address the changing conditions in the oil and gas industry. The total encapsulation, in addition to GPT's proprietary ID seal, allows the gasket to be installed prior to hydrotesting and then left in place with no loss in isolation properties. EVOLUTION™ is only ⅛-in thick and is fire safe thanks to a unique C-ring design. The product also has a handle to ease installation and removal as well as provide traceability through a laser-etched numbering system. In addition to all of these attributes, the gasket also is the highest pressure capa- ble isolating gasket that has been tested to date, and it is approxi- mately 100 °F (38 °C) higher in operating temperature than G11 GRE products. EVOLUTION™ represents the best available technology for isolating oil and gas pipelines, and incorporates all of the bene- fits of predecessor products into one complete and robust package. EVOLUTION™: The Future of Flange Isolation

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