Cold Drawn Welded (CDW) Pipes

Description

CDW (Cold Drawn Welded) steel pipes are manufactured by forming a longitudinally welded steel tube and then cold drawing it through a die to achieve a precise and uniform diameter and wall thickness. This process results in a high-quality pipe with a smooth surface finish.

Standards and Grades:

• ASTM A53 – Welded and Seamless Steel Pipe
• ASTM A1065 – Electric-Resistance-Welded Steel Tubing for Mechanical Applications

CDW pipes can have various wall thicknesses, often expressed in inches or millimeters. Unlike some welded pipe standards (e.g., Schedule 40, Schedule 80), there isn’t a pre-defined set of schedules for CDW pipes. The specific wall thickness will depend on factors like:

• Pressure Rating: The pipe needs to withstand the intended pressure of the application. Thicker walls can handle higher pressures.
• Structural Requirements: In some applications, the pipe might need a specific wall thickness for structural integrity, independent of pressure.
• Manufacturer’s Offerings: Manufacturers might offer specific wall thickness options within their CDW pipe product line.

Since CDW pipes are often used in niche applications, some manufacturers might offer custom sizes beyond standard NPS diameters and wall thicknesses.