FRP fan

  Material: FRP
Type: FRP axial flow fan FRP centrifugal fan
Model: t35-11 type axial flow fan T30 type axial fan BWT series FRP centrifugal roof fan gbf4-72-12 series FRP centrifugal fan
Performance parameters: see the above product related introduction

Lining Processes and Application Limits

A steel lining is not a single coating. The process chain runs from grit blasting to Sa2.5, adhesive application, sheet or hot pressing, vulcanisation (autoclave or ambient), spark testing, thickness measurement, to flange turn-up and weld treatment. A failure at any step shows up later as blistering, debonding or a local perforation.

For ambient corrosive gas, PP-lined, PE-lined and rubber lining can complement an FRP design; strongly oxidising media call for PTFE-lined construction.

Lining type	Base and lining	Typical temperature	Media and process notes
Rubber lining	Steel + natural or butyl rubber	Usually up to 80 C	Dilute acids and abrasion; sheet applied after blasting, autoclave cured
Plastic lining	Steel + PP, PE or PVDF	Commonly 60 to 120 C	Acids, alkalis and salts; hot pressed or loose lined, flanged seal
PP-lined	Carbon steel + polypropylene	Commonly up to 100 C	Acids, alkalis and salts; sheet or roll lining, double welded seams
PE-lined	Carbon steel + polyethylene	Commonly 60 to 70 C	Abrasion and low temperature; ambient solids bearing media
PTFE-lined	Carbon steel + PTFE	Commonly -180 to 260 C	Strong acids, alkalis and oxidisers; isostatic or loose lining, flanged seal
Natural rubber lining	Carbon steel + natural rubber	Commonly up to 70 C	Dilute acids and solids; bond strength checked after cure
Butyl rubber lining	Carbon steel + butyl rubber	Commonly up to 90 C	Good gas tightness and weathering; suitable for gas bearing media

Concentration, temperature, solids content and oxidising components should be written into the technical agreement. After lining, the fan is performance tested to GB/T 1236, balanced to GB/T 9239.1, and the lining is spark tested and thickness checked.