Reference
The things we end up explaining anyway
Written out properly so you do not have to phone us to find out. Formulas, specification guidance and material selection — the same answers we would give on a call.
Open area formulas for perforated sheet
Every pattern reduces to one idea: hole area divided by the area of the cell that contains it. Here is that model, the formulas it produces, and how to check your own numbers.
6 min read· has a calculator
How to write a perforation spec that can be quoted
Most enquiries arrive missing the same four things. Here is what to include, and the three rules that quietly decide whether a drawing can be made at all.
5 min read· has a calculator
Sizing a demister pad with Souders–Brown
A mist eliminator is a simple object with an unforgiving specification. Size it above its capacity and it floods; below, and it is money spent on pressure drop.
7 min read· has a calculator
SS 304 or SS 316: choosing without overspending
316 costs meaningfully more than 304 and is specified far more often than it is needed — and occasionally not specified when it is essential.
4 min read
Open area, daylight and privacy in perforated facades
A perforated facade does four things at once — shades, screens, ventilates and is seen. Open area is the single number that trades them against each other.
5 min read· has a calculator