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HEAT TREATING
When the extrusion process is complete, the headers
are either normalized, normalized and tempered, or quench and tempered
heat treated. After heat treatment, in-house destructive or nondestructive
tests can be performed.
RADIOGRAPHY
All longitudinal seams are completely radiographed
in-house to verify weld integrity.
STRESS RELIEF
Headers may be stress relieved. Where scraper bars
are required, outlets are machined and bars installed prior to
stress relief.
BLASTING
Headers are either shot or sand blasted to a commercial
finish.
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