ASTM A387 grade 91
Sources: this site Click: Date: 2015-12-22 22:30:3
ASTM A387 grade 91 specification covers chromium-molybdenum alloy steel plates intended primarily for welded boilers and pressure vessels designed for elevated temperature service.
A387 grade91 welded pipe/tube dimension
ERW outer diameter:21.3-660mm thickness:6-25mm
LSAW outer diameter:325-1524mm thickness:6-50mm
SSAW outer diameter:219-3200mm thickness:5-25mm
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