Perforated metal sheet
Sheet thickness: 0.2 – 6.0 mmHole size: 0.5 – 30 mm
Sheet thickness
0.2 – 6.0 mm
Anping County, Hebei — perforated sheet and expanded mesh
Holes, diamonds, and a surface you can stand on.
Four lines out of the Anping cluster: perforated sheet, aluminium expanded mesh, steel expanded mesh, and anti-slip step treads. Quoted by hole, mesh, thickness and finish — plus the weight per square metre, so offers can be compared.
Hole size
0.5 – 30 mm
Expanded mesh
SWM 5 – 75 mm
Tread width
200 – 300 mm
Four lines, one inspection bench
A punched sheet, an expanded sheet and a finished tread are three different processes, measured the same way: against a drawing, before it is loaded.
Aluminium expanded mesh
Alloy: AA 1100 / 3003 / 5052Sheet thickness: 0.5 – 3.0 mm
Steel expanded mesh
Base thickness: 0.5 – 8.0 mmStrand width: 1.0 – 12 mm
Anti-slip step treads
Tread width: 200 / 250 / 300 mmBase thickness: 2.0 – 5.0 mm
What gets checked, and how
A price is only comparable when both offers were measured the same way. These are the four checks behind every quotation.
Hole and pitch
Pin gauges and a caliper at three points across the sheet, measured against the drawing rather than against the last run.
Mesh and strand
SWM, LWM and strand width on every expanded lot — the four numbers that decide weight and stiffness.
Thickness and flatness
Micrometer on the base sheet, plus a camber check: a panel that will not sit flat is a rejected panel.
Finish
Zinc coating weight on galvanized sheet, anodise or coating thickness on aluminium, adhesion on powder coat.
From inquiry to bill of lading
01
Inquiry and spec sheet
Six numbers, a drawing or a photo. We come back with open area, weight per square metre, price and lead time — and the questions the drawing did not answer.
02
Sample or drawing approval
Stock patterns ship from stock samples. Custom dies, finishes and formed parts are approved on a sample panel before the line starts.
03
Production and in-line checks
Hole, mesh, strand width, thickness and panel size are measured during the run, not only at the end.
04
Pre-shipment inspection
Third-party inspection on request — SGS, BV or the buyer's own agent. Container loading photographs come as standard.
05
Documents and loading
Invoice, packing list, bill of lading, material certificate, certificate of origin (CO, Form E for ASEAN, Form F for Chile). Fumigated crates carry the ISPM 15 mark.
Documents that travel with the container
Paperwork is part of the product. These arrive before the vessel does, and any of them can be arranged on request.
Commercial invoice and packing list
Per container, with the weight and the number of sheets or panels on each line.
Material certificate
Alloy and temper for aluminium; steel grade, thickness and coating weight for galvanized sheet.
Certificate of origin
CO, Form E for ASEAN destinations, Form F for Chile.
Third-party inspection
SGS, BV, TUV or the buyer's nominated agent, arranged before loading on request.
Fumigation and ISPM 15
Wooden crates and pallets carry the ISPM 15 mark; phytosanitary paperwork on request.
Loading photographs
Container number, seal and the loaded stow, sent before the vessel sails.
Notes from the technical desk
All notesReading a perforated metal spec: hole, pitch and open area
Three numbers describe a perforated sheet completely. Once you can turn them into open area, you can price and compare without asking anyone.
Aluminium or steel expanded mesh: which surface for which job
Both are made the same way and behave very differently. The choice comes down to whether the panel has to carry weight or simply hang there.