NEWS-Zhishang Steel

Tube and Pipe Are Not the Same Word on an Order2026-10-19

Pipe and tube come off the same mill, but they are sold in two languages: nominal size with a schedule for pipe, outside diameter against wall in millimetres fo···

Heat Exchanger Tube: The Thermal Sum Behind the Alloy Choice2026-10-19

The tube wall is the smallest resistance in a heat exchanger, and a fouling film on either side usually costs more than the whole alloy wall. What each grade ac···

The Beam Is the Easy Part: Plates, Connections and Processing in a Steel Frame Order2026-10-19

A frame is quoted as a beam schedule and built from plates, bolts and welds. How to read a section by its five dimensions, why an IPE 450 is not a 450 mm H-sect···

Sizing the Wall: Working Pressure, Temperature and the Tolerance That Eats It2026-10-19

A schedule number describes a wall series, not a pressure rating. How hoop stress, allowable stress and design temperature actually set the wall, why P91 loses ···

Batch Hot-Dip Galvanizing of Fabricated Steel: Design, Sequence and Coating Numbers2026-10-16

Continuous galvanized coil and batch-dipped fabrications are different products with different rules. Why the coating grows out of the steel, how to convert Z d···

Joining Stainless to Carbon Steel: Why the Transition Joint Is a Third Material2026-10-16

What actually changes when the two sides of a weld are different metals: no datasheet covers the fusion zone, expansion and conductivity pull against each other···