The Specification of Q235B Spiral Welded Carbon Steel Pipe

Q235B Galvanized Pipe Overview

Q235B Galvanized Pipes are low-alloy, highly adaptable steel pipes designed for structural applications across multiple industries. The zinc coating, typically ranging from 46–80 microns, provides excellent corrosion resistance, making these pipes highly durable under harsh weather conditions.

The base material consists of approximately 0.22% carbon, which ensures superior weldability. Additional elements include phosphorus (0.045%), manganese (1.4%), aluminum and sulfur (0.05%), and silicon (0.35%), all contributing to the pipe's mechanical performance.

In terms of physical characteristics, Q235B galvanized pipes have a Brinell hardness of 130–160 HB and elongation ranging from 20% to 25%, although thicker pipes exhibit slightly reduced elongation.

This combination of strength, flexibility, and corrosion resistance makes Q235B galvanized pipes a reliable choice for construction, machinery, liquid transportation, and various engineering applications.

Material
10#, 20#, 35#, 45#, Q235, 16Mn, etc.; A106B, A53B

Wall Thickness
2.5–90 mm

Length
6 meters

Standards
ASTM A106B, A53B; DIN ST44, ST35, ST37, ST52; API 5L B, X42; GB 8162, GB 8163

Surface Finish
Painted, oiled, galvanized, or customized per request

Outer Diameter (OD)
21.3–813 mm

Packing
Bundled or bulk shipment

Reference Steel Pipe Sizes