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by Swagelok Northern California
by Jeff Hopkins, on 8/14/18 9:00 AM
Intertek specialists have finally identified the damage mechanism long suspected in Grade-91 tubing (T-91). They presented their findings at the February 2018 HRSG (heat recovery steam generator) User’s Group Conference.
If reheater tubes reach a high enough temperature (1,150F), spinel oxide scale begins to build up on the interior surfaces. When the scale reaches sufficient thickness, layers of it break off, a process dubbed “exfoliation.” The spinel then travels downstream and forms deposits on steam turbine stop valves or other components that experience high steam velocities. The process repeats over and over, and is accelerated by flow abnormalities. Intertek recommends employing a continuous monitoring system just upstream of duct burners, to ensure they are not raising the temperature of the tubing.
Your fluid systems can't fail—and they can't leak. That's why Swagelok Northern California offers mission critical solutions for the petrochem, semi, power, and oil and gas industries around the Bay Area and into NW Nevada. We manufacture and assemble reliable, customizable components that get the job done. Contact our team today to learn about custom solutions for your plant or refinery.
3393 W Warren Ave
Fremont, CA 94538
Main tel: 510-933-6200
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*If you are not located in our service area, we route your request to your local Swagelok Sales and Service Center as soon as possible.
*If you are not located in our service area (northern California and northwestern Nevada), we will route your request to your local Swagelok Sales and Service Center as soon as possible. You can locate the contact information for your local Swagelok Sales and Service center at http://www.swagelok.com/en/locate-a-sales-service-center.
Swagelok Northern California
Swagelok Northern California is a locally owned sales and service center of Swagelok, a company celebrating 75 years in business. We have locations in Fremont, Sunnyvale, and Concord, CA (USA). Phone: 510-933-6200.