Pulp & Paper
Why Pulp & Paper Needs FRP
Pulp and paper mills are chemical battlegrounds: chlorine dioxide, caustic soda and sulfuric acid attack every surface. FRP has been the standard for bleach plant platforms for decades — and ZeAllgrate builds to that standard.- Chlorine dioxide corrosion of steel
- Caustic and acid process exposure
- Wet, chemical-rich atmosphere throughout the mill
- Walkways over process vessels and chests
ZeAllgrate Solutions for Pulp & Paper
ZeAllgrate vinyl ester molded grating and structural profiles are specified for bleach plants and chemical recovery areas where chlorine dioxide would destroy conventional materials.
Typical Applications
Bleach plant platforms
Chemical recovery walkways
Digester access decks
Paper machine mezzanines
Chemical storage areas
Wet-end maintenance platforms
Project Gallery
Real ZeAllgrate FRP grating products and installations in service across this industry.
FRP walkway over bleach plant process chests
Vinyl ester FRP platform in a chemical recovery area
Grit-top FRP grating for wet-end paper machine walkways
Solutions for Every Process Area
Engineered FRP solutions mapped to each stage of your facility — from corrosive process zones to high-traffic access routes.
Vinyl-ester grating resisting chlorine dioxide and bleaching chemicals.
Long-span walkways along paper machines with vibration resistance.
Secondary containment and platforms for pulping chemicals.
H₂S-resistant walkways and covers in effluent treatment areas.
Technical Specifications & Compliance
Application-specific engineering reference for Pulp & Paper — corrosion rating, load criteria, governing codes and the recommended ZeAllgrate configuration. Use this as the specification starting point; final design must be verified against certified load/span charts and the project's governing codes.
| Parameter | Specification for Pulp & Paper |
|---|---|
| Corrosion Level | Severe Chlorine dioxide (ClO₂), caustic soda and digester chemistry in a perpetually wet, chemical-rich atmosphere. |
| Typical Load Requirements | Bleach-plant & chemical-recovery walkways 75 psf (3.6 kN/m²) pedestrian; paper-machine mezzanines 100 psf (4.8 kN/m²) with vibration cycling; roll-storage decks for high point loads. |
| Applicable Standards & Regulations | OSHA 1910.29, ISO 14122, ASTM E84, TAPPI (pulp & paper engineering practice), NFPA 85 (boiler/recall if adjacent to recovery boilers). |
| Recommended Resin System | ZeAll VE is mandatory in bleach plant (ClO₂) and white-liquor areas; ZeAll ISO for machine hall & general mill walkways; ZeAll FR where fire code applies. |
| Recommended Grating Type | Molded 38.1/50.8 mm for bleach-plant & chemical storage platforms; Pultruded I5020/I6015 for long paper-machine walkways with vibration; solid covers under chemical chests. |
Resin systems: ZeAll VE (vinyl ester — severe corrosion), ZeAll ISO (isophthalic polyester — general service), ZeAll FDA (food/potable grade), ZeAll FR (extra flame-retardant), Phenolic (fire/smoke-critical). Grating types: Molded (bi-directional), Pultruded (long-span), Mini-Mesh (fine openings), HLC (high-load capacity).
Pulp & Paper Service Requirements
| Condition | ZeAllgrate Response |
|---|---|
| Bleach plant chemistry | Vinyl ester / novolac for chlorine dioxide zones |
| Humidity & washdown | Corrosion-proof; no paint programme |
| Chemical recovery | Resin matched to the chemical list |
| Wet traffic | Grit-top surfaces on machine decks |
Specification Guidance
Bleach and recovery areas concentrate the corrosive load — chlorine dioxide, caustic and acid service — so resin selection is the specification: vinyl ester covers most bleach-plant zones, novolac extends into the hottest strong-acid service, and the chemical list is confirmed at actual concentration and temperature. Grit-top decks handle the wet traffic; pultruded framing and SS316 hardware complete the package. The case library documents a bleach plant platform installation.
Bleach and recovery areas concentrate the corrosive load — chlorine dioxide, caustic and acid service — so resin selection is the specification: vinyl ester covers most bleach-plant zones, novolac extends into the hottest strong-acid service, and the chemical list is confirmed at actual concentration and temperature. Grit-top decks handle the wet traffic; pultruded framing and SS316 hardware complete the package. The case library documents a bleach plant platform installation.Go Deeper with the ZeAllgrate Knowledge Base
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