Purchasing PPGI & PPGL coils or sheets.
Contents |
[edit] Introduction
Pre-Painted Galvanised Iron (PPGI) or pre-coated steel, colour coated steel etc, is made of galvanized steel and then coated with organic coatings. Normally this hot dip zinc coated steel substrate comes in different forms such as coils or sheets. Pre-painted galvalume steel (PPGL) is a colour-coated steel with galvalume steel as a substrate. It combines the strength of steel with excellent anti-corrosion of Zn-Al coating so performs better than PPGI in this regard, it also comes in different forms.
[edit] Quality
When purchasing a PPGI coil, attention needs to be paid to the quality of the base metal, the galvanized steel sheet, the zinc coating, the thickness, and also the coating types. Experienced manufacturers apply the coating on both sides of the steel coils to provide a high-quality, consistent finish in texture, performance, thickness, and colour. Third party inspections might also be advisable.
[edit] Safety
PPGI steel coils may have environmental benefits over general colour-coated coils that pre-painted galvanized steel coils offer to the manufacturing plants. They also eliminate various manufacturing imperfections, such as uneven applications of dirt residue and oil.
[edit] Versatility
One of the reasons some people are now using pre-painted steel coils is because of their versatility. It is a tried and tested product in the manufacturing industry. Any business involved in the production of metal roofing, automotive parts, beverage cans, garage doors, wall panels, HVAC ductwork, food service equipment, office furniture, and home appliances could switch to pre-painted steel coils.
[edit] Longevity
A PPGI steel coil manufacturer will highlight the longevity of pre-painted steel coils. Galvanized steel coils for different manufacturing processes ensure uniform treatment of metal parts with two coats of paint. This process provides a tight bond that not only enhances long-term durability but also resists corrosion. According to research studies, comparing pre-painted metal parts with raw metals treated in manufacturing plants - pre-painted steel coils provide a superior, corrosion-resistant product that outperforms metal product painted or treated in the plant.
The alloy of zinc and aluminium makes PPGL steel coils resistant to environmental damage, especially if used in coastal areas. Most importantly, aluminium creates a mechanical barrier from environmental impacts and prevents scratches on the steel sheet surfaces. Zinc keeps the coils safe by creating a protective compound for the coils' base steel layers.
[edit] Related articles on Designing Buildings
Featured articles and news
The UK's Modern Industrial Strategy: A 10 year plan
Previous consultation criticism, current key elements and general support with some persisting reservations.
Building Safety Regulator reforms
New roles, new staff and a new fast track service pave the way for a single construction regulator.
Architectural Technologist CPDs and Communications
CIAT CPD… and how you can do it!
Cooling centres and cool spaces
Managing extreme heat in cities by directing the public to places for heat stress relief and water sources.
Winter gardens: A brief history and warm variations
Extending the season with glass in different forms and terms.
Restoring Great Yarmouth's Winter Gardens
Transforming one of the least sustainable constructions imaginable.
Construction Skills Mission Board launch sector drive
Newly formed government and industry collaboration set strategy for recruiting an additional 100,000 construction workers a year.
New Architects Code comes into effect in September 2025
ARB Architects Code of Conduct and Practice available with ongoing consultation regarding guidance.
Welsh Skills Body (Medr) launches ambitious plan
The new skills body brings together funding and regulation of tertiary education and research for the devolved nation.
Paul Gandy FCIOB announced as next CIOB President
Former Tilbury Douglas CEO takes helm.
UK Infrastructure: A 10 Year Strategy. In brief with reactions
With the National Infrastructure and Service Transformation Authority (NISTA).
Ebenezer Howard: inventor of the garden city. Book review.
The Grenfell Tower fire, eight years on
A time to pause and reflect as Dubai tower block fire reported just before anniversary.
Airtightness Topic Guide BSRIA TG 27/2025
Explaining the basics of airtightness, what it is, why it's important, when it's required and how it's carried out.
Construction contract awards hit lowest point of 2025
Plummeting for second consecutive month, intensifying concerns for housing and infrastructure goals.
Understanding Mental Health in the Built Environment 2025
Examining the state of mental health in construction, shedding light on levels of stress, anxiety and depression.