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GB/T 18248 seamless gas cylinder tube is a kind of seamless steel tube for gas cylinders.

ASTM A778 stainless steel pipe is used in low to moderate temperature applications. The specification is for unannealed, welded stainless steel materials.

SSAW steel pipe is also known as the Spiral Submerged- Arc Welded Steel Pipe that is a type of spirally welded steel pipe produced by using the double-sided submerged arc welding method.

A335 P5 P9 alloy steel pipe is an alloy structural steel made by hot rolling process.