What is PPGI?
PPGI stands for pre-painted galvanized iron (steel): a hot-dip galvanized coil that is cleaned, chromate- or chromate-free-pretreated, primed (5–8 µm epoxy or polyurethane) and top-coated (15–35 µm) on a continuous coil-coating line, with a backing coat (5–12 µm) on the reverse. The paint is cured in seconds at 230–250 °C and the coil is rewound, film-protected if required, and shipped colour-finished. PPGL is the same process on an aluzinc (AZ150) substrate. The product replaces post-painting: a roofing sheet, a sandwich-panel skin, a refrigerator door or a roller shutter is formed from PPGI and needs no further finishing.
Coating systems: PE, SMP, PVDF, plastisol
| System | Dry film | Gloss | UV / colour retention (RUV) | Corrosion (RC) | Formability (T-bend) | Life outdoors* | Price index | Use |
|---|---|---|---|---|---|---|---|---|
| Polyester (PE / SP) | 25 µm | 20–60% | RUV2–3 | RC3 | 2–3T | 10–15 yr | 1.00 | Standard roofing, cladding, panels, appliances |
| Silicone-modified polyester (SMP) | 25 µm | 20–40% | RUV3 | RC3 | 3T | 15–20 yr | 1.05–1.08 | Roofing in strong sun (Gulf, Africa) |
| Polyurethane (PUR / PU-PA) | 35–50 µm | 30–40% | RUV4 | RC4 | 2T | 20–30 yr | 1.12–1.18 | Architectural, coastal |
| PVDF (Kynar 500-type, 70/30) | 25–35 µm | 25–35% | RUV4 | RC4 | 2T | 25–35 yr | 1.15–1.25 | Architectural façades, Gulf sun, colour stability |
| Plastisol (PVC) | 200 µm | Leather-grain | RUV3 | RC5 | 0T | 25–40 yr | 1.30–1.40 | Coastal, industrial, agricultural roofing |
| Polyester matt / textured | 30 µm | ≤ 10% | RUV3 | RC3 | 3T | 15–20 yr | 1.08 | Low-glare roofs, villas |
* to first maintenance, rural/urban; halve for coastal. RUV/RC categories per EN 10169; test methods EN 13523.
Colours and stock
| RAL | Colour | Typical use | Availability |
|---|---|---|---|
| 9002 | Grey white | Roofing, panels — most ordered | Stock |
| 9010 | Pure white | Cold rooms, panels, ceilings | Stock |
| 9006 | White aluminium | Cladding, industrial | Stock |
| 3009 | Oxide red | Roofing (Gulf, Africa, Balkans) | Stock |
| 5010 | Gentian blue | Roofing, sheds | Stock |
| 6005 | Moss green | Roofing, agricultural | Stock |
| 7016 | Anthracite grey | Architectural cladding, villas | Stock |
| 8017 | Chocolate brown | Tile-profile roofs | Stock |
| Any RAL / BS / custom | Matched | Projects | 5 t per shade, 2–4 weeks |
| Wood-grain, brick, camouflage print | Printed | Doors, panels, cladding | 10 t, 3–5 weeks |
Colour pages
The six stock colours each have a page with colour data, the right coating system for that shade, gauges, kg/m² and the month's band: RAL 9002 grey white (the roofing standard), RAL 9010 pure white (food and cold-store), RAL 3009 oxide red (tile-profile red), RAL 7016 anthracite (façades and fences), RAL 6005 moss green (agricultural and landscape) and RAL 1018 zinc yellow (safety and branding). Any other RAL is made to order from 10 t.
Substrate: galvanized or aluzinc, zinc class, grade
| Substrate | Coating mass | Grade | Thickness | Choose for |
|---|---|---|---|---|
| Galvanized DX51D+Z (PPGI) | Z100 / Z140 / Z200 / Z275 | DX51D (forming), S250–S350GD (structural) | 0.30–1.20 mm | Standard; Z200+ coastal |
| Aluzinc AZ150 (PPGL) | AZ150 | DX51D+AZ, S280GD+AZ | 0.40–0.80 mm | Humid tropics, longer life, heat reflection |
| Zinc-magnesium ZM (PPZM) | ZM120–ZM175 | DX51D+ZM | 0.50–1.00 mm | Cut-edge protection, 25+ yr |
| Electro-galvanized (PPEG) | EG 2.5–5 µm | DC01 | 0.40–1.00 mm | Indoor appliances, best surface |
Thickness, width and weight
| Base thickness | TCT (approx.) | kg/m² (Z140) | m² per ton | Typical use |
|---|---|---|---|---|
| 0.30 mm | 0.35 | 2.55 | 392 | Corrugated sheet (Africa), fences |
| 0.35 mm | 0.40 | 2.95 | 339 | Corrugated / trapezoidal, budget |
| 0.40 mm | 0.45 | 3.34 | 299 | Trapezoidal, tile profile, panels |
| 0.45 mm | 0.50 | 3.73 | 268 | Roofing, sandwich skins |
| 0.50 mm | 0.55 | 4.12 | 243 | Roofing export standard, panel skins |
| 0.60 mm | 0.65 | 4.91 | 204 | Cladding, long-span roofs |
| 0.70 mm | 0.75 | 5.70 | 175 | Heavy roofing, deck |
| 0.80 – 1.20 mm | 0.85–1.25 | 6.5–9.6 | 154–104 | Doors, shutters, appliances, purlins |
Widths 1 000, 1 200, 1 250 mm (914 and 1 219 on request); coils 3–10 t, ID 508 mm; sheets 2 000–6 000 mm cut.
Forming, cutting and protective film
PPGI is roll-formed (our trapezoidal, corrugated and tile lines), press-braked (bend radius ≥ 1–2T at 20 °C for PE, 0T for plastisol), slit and cut-to-length, and laser-cut with the film on; guillotine cut edges are protected by the zinc and primer. A 40–80 µm PE protective film (clear or printed) is applied on request for shutters, doors and appliance panels; remove within 30 days of forming. Do not form below 10 °C for PE coatings.
Applications
- Trapezoidal, corrugated and tile-profile roofing and cladding (see roofing pages)
- Sandwich-panel skins (RAL 9002/9010, PE or PVDF)
- Roller shutters, garage and steel doors, door frames
- Appliances: refrigerators, washing machines, water heaters, AC casings
- Ceiling panels, partitions, cable trays, furniture, shelving
- Gutters, downpipes, flashings, ductwork
PPGI price per ton
Indicative FOB Istanbul bands from our weekly export list, PE 25 µm on Z140 DX51D, full-container quantities: stock colours 0.50 mm and the all-colour band 0.35–0.70 mm. PVDF adds 15–25%, plastisol 30–40%, AZ150 substrate 8–12%, dark or metallic colours 3–8%, protective film 2–3%.
Bands from our weekly export list (September 2026), FOB Istanbul, full-container quantities, excluding freight and certificates. Firm price per project on RFQ within one working day.
Export and packing
Coils eye-to-sky on cradles, paper and PE film, edge protectors; sheets on pallets with paper interleaving. HS code 7210.70 (flat-rolled, painted, varnished or coated with plastics). Colour certificates and paint-system data sheets travel with the shipment.
| Term | Detail |
|---|---|
| MOQ | 1 × 20' (3 coils ≈ 21 t); special colours 5 t per shade |
| Incoterms | FOB Istanbul · CIF / CFR Gulf, Red Sea, West and East Africa · DAP EU, Balkans, Iraq, Caucasus · DAP Aktau / Almaty |
| Lead time | Stock colours 5–10 working days; special RAL 2–4 weeks; PVDF / plastisol 3–5 weeks |
| Packing | Coils eye-to-sky, paper + PE, edge protectors; sheets on pallets, interleaved |
| Container / truck | 20' ≈ 21 t · 40' HC ≈ 24–25 t · truck 22–24 t |
| Documents | Invoice, packing list, EN 10204 3.1, coating certificate, certificate of origin; SASO / SONCAP / EAC on request |
| Payment | 30% advance, balance against B/L copy; L/C at sight via London office |
Certificates
EN 10204 3.1 for the substrate, coil-coating certificate (system, dry film, gloss, colour ΔE, T-bend, MEK, salt-spray), certificate of origin; SASO, SONCAP, EAC on request; fire reaction class A1 (EN 13501-1) statement for PE ≤ 25 µm.
How to order
Send thickness, width, substrate and zinc class, coating system and colour (RAL or sample), film yes/no, quantity and port. Reply within one working day; stock colours load in 5–10 working days.
Standards
- EN 10169 (continuously organic-coated (coil-coated) steel flat products)
- EN 10346 (galvanized substrate)
- EN 13523 (coil-coating test methods)
- ASTM A755 (pre-painted), A653 substrate
- JIS G3312 (CGCC)
- ECCA guidelines
Grades
Grade data sheets (chemistry, mechanicals, equivalents) are on our reference site: DX51D+Z (substrate) · S250GD · S280GD · S350GD
Frequently asked questions
What is PPGI?
Pre-painted galvanized iron (steel): hot-dip galvanized coil coated on a continuous line with primer and a polyester, PVDF or plastisol top coat in RAL colours, delivered ready to form. PPGL is the same on an aluzinc substrate.
What is the full form of PPGI and PPGL?
PPGI = pre-painted galvanized iron; PPGL = pre-painted galvalume (aluzinc). Both are colour-coated steel to EN 10169 / ASTM A755.
Which coating: polyester or PVDF?
Polyester (PE 25 µm) for standard roofing, cladding and panels — 10–15 years; PVDF (35 µm) for architectural façades, Gulf sun and colour stability — 25–35 years at 15–25% more. Plastisol (200 µm) for coastal, industrial and agricultural roofs.
What colours are in stock?
RAL 9002, 9010, 9006, 3009, 5010, 6005, 7016 and 8017 in 0.35–0.70 mm; any other RAL from 5 t per shade in 2–4 weeks.
What thickness is PPGI roofing sheet?
0.40–0.50 mm base metal for most roofs (0.45–0.55 mm total coated thickness), 0.30–0.35 mm for budget corrugated sheet, 0.60–0.70 mm for long spans. Always specify base-metal thickness (BMT).
Can PPGI be bent and roll-formed?
Yes — PE coatings take a 1–2T bend, plastisol 0T; roll-forming into trapezoidal, corrugated and tile profiles is done on our own lines from the same coil. Avoid forming below 10 °C.
What is the price of PPGI per ton?
See the indicative FOB Istanbul bands above for PE on Z140; PVDF, plastisol, aluzinc substrate and dark colours add 3–40%. Firm price within one working day.
Do you supply PPGI cut to sheets or as roofing profiles?
Both: coils, cut-to-length flat sheets, slit strip, and roll-formed trapezoidal, corrugated and tile-profile sheets with matching flashings.