NEWS-Zhishang Steel

Air Separation Cold Boxes: Piping for a 216 K Drop2026-11-05

Inside an air separation cold box every line is stainless and none of it can be inspected after the box is closed. Why 304L, how a 216 K drop moves 90 mm of pip···

Surgical Instruments: The Order Is a Hardness Range, Not a Grade2026-11-05

A surgical instrument purchase order carries a grade, a condition and a hardness range, never the word surgical. Why 420 stops near 48 HRC, what 416HT, 17-4PH a···

Molten Salt Tank Plate: Specifying for the Anneal That Never Happens2026-11-04

A 20 metre molten salt tank never sees a furnace after it is welded, so the grade has to survive the heat affected zone as-welded. Why 347H and 321H earn their ···

Penstock Steel: Head, Surge and the Wall That Has to Hold Both2026-11-04

A penstock arrives as pipe, gets welded in a trench and disappears for the life of the scheme. How static head and surge set the wall, why the can length decide···

A Data Hall Is Built Before the Racks Are Chosen2026-11-02

A 42U rack puts 1,390 to 2,080 kg per square metre on a floor designed for a few hundred, and the racks are chosen after the frame. How the load assumption, the···

What a Sugar Mill Buys Before the Cane Is Cut2026-11-02

A sugar mill runs a 150 to 200 day campaign in which nothing can be replaced, so the steel order is written in the off-season, station by station. What each sta···