News & Technical Articles

November 13, 2026 • 17 min read

Headed shear studs for composite beams: EN ISO 13918 sizes, stud steel, EN 1994-1-1 design resistance, through-deck welding, testing and ordering.

November 12, 2026 • 16 min read

Railway rails explained: flat-bottom (Vignoles), bullhead and double-headed rails, EN 13674 profiles such as 60E1, steel grades, welding and ordering.

November 11, 2026 • 16 min read

How to specify manholes and covers: EN 124 classes A15 to F900 and where each goes, clear opening, concrete vs HDPE chambers, buoyancy and installation.

November 11, 2026 • 16 min read

What geocomposites are: drainage cores and filters, GCLs, paving interlayers, in-plane flow tests, reduction factors and how to size a drainage layer.

November 10, 2026 • 16 min read

Blast cleaning for coatings: ISO 8501-1 Sa grades vs SSPC/NACE, rust grades, surface profile, salts and dew point, blast media and compressor air demand.

November 09, 2026 • 16 min read

How progressive cavity pumps work: rotor and stator geometry, pressure per stage, stator elastomers, speed for abrasive duty, sizing and selection.

November 08, 2026 • 16 min read

How external and internal gear pumps work: slip and viscosity, speed limits, relief valves, materials, gear vs lobe vs vane, and a worked sizing example.

November 08, 2026 • 16 min read

How dosing and metering pumps work: diaphragm, plunger and peristaltic types, API 675 accuracy, turndown, materials, accessories and dose-rate sizing.

November 07, 2026 • 16 min read

How sprinkler system valves work: alarm check, dry pipe, deluge and pre-action valves, OS&Y and supervised control valves, approvals and NFPA 25 tests.