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Black ERW steel pipe
Black ERW steel pipes are used in various engineering purposes, fencing, scaffolding, line pipes etc. These tubes & pipes are available in varying qualities, wall thickness, diameters and finishes depending on the requirement of the end-users.
ERW pipe cold formed from a ribbon of steel pulled through a series of rollers and formed into a tube which is fused through a electric charge.
DSAW pipe (Double Submerged arc welded pipe) Double Submerged Arc Welded (DSAW) steel pipe is available in straight and spiral welded formats and used in a variety of applications.
ERW pipe cold formed from a ribbon of steel pulled through a series of rollers and formed into a tube which is fused through a electric charge.
Common sizes for ERW Steel Pipe range from 2 3/8 inch OD to 24 inch OD in a variety of lengths to over 100 feet.
Surface finishes are available in bare and coated formats and ERW steel pipe processing can be handled on site to customer specifications.
Segregation
Segregation is the uneven distribution of chemical composition in the steel, in particular harmful elements such as sulfur, phosphorus enrichment in the ingot.
Non-metallic inclusions
Non-metallic inclusions refers to non-metallic inclusions in steel containing impurities such as sulfides and oxides.
Stomata
Stomata refers iron and carbon monoxide gas effect generated in the pouring can not fully escape and stay in the tiny pores in the ingot.
Shrinkage
Shrinkage is due to the liquid steel ingot mold from outside to inside, the volume contraction during solidification bottom-up, because the level drops, the final solidification of liquid steel parts can not be added to form.
Crack
Solidification of liquid steel in the order due to different causes stress, tension cracks may appear larger parts.
What Is Black Steel Pipe?
Black steel pipe is made of steel that has not been galvanized. Its name comes from the scaly, dark-colored iron oxide coating on its surface. It's used in applications that don't require galvanized steel
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