Method Statement for GRP Lining in Water Tank.
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Method Statement for GRP Lining in Water Tank.

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Method Statement for GRP Lining in Water Tank.


 PURPOSE AND SCOPE OF WORK.

The purpose of this method of statement is to define the specific procedure for the sequence of GRP lining works in a confined space considering all safety and quality requirements for this project. 

The scope of this method statement is to provide the specific work procedures for the complete application and handing over of GRP lining in a confined space for concrete surfaces including water tanks in accordance with the material approval and specifications.

This document defines Methodology, Application, Materials, Inspection, Final Approvals, Quality & Safety requirements and equipment intended to be used in performing the works as established in the project specifications and Method statement details the procedure for GRP lining for concrete surfaces on a confined space. 

REFERENCE.

  • Project Specification                       
  • Approved project drawings and specifications. 
  • Relevant local and international construction standards. 
  • This Method of Statement is to be reviewed and approved by the relevant project stakeholders and authorities before commencing any construction activities 
  • Material Submittal Approval 

MATERIALS, TOOLS & EQUIPMENTS.

  • Materials 
  • Polychem Resin
  • J&C Fibre mat
  • Catalyst  
  • Acetone 
  • Gelcoat (Polygel-2106) 
  • Tools & Equipment.  
  • Drill Machine 
  • Mixing Machine 
  • Grinder 
  • Exhaust Fan 
  • Duct Hose 
  • Handle 
  • Roller 
  • Brushes 
  • Scraper 
  • Grinder 

WORK PROCEDURE.

Preliminary: - 

1. Before commencing GRP works, materials will be submitted and approval 

will be taken. 

2. Proper coordination with other services and MEP, incorporating wall 

opening, sleeves or any other Architectural and Electrical/Mechanical 

services opening will be subject to approval of Engineer. 

3. Ensure approval of this Method Statement prior to starting GRP lining works. 

Material Delivery, Handling & Storage: - 

1. Upon receiving all the approved material on site related to GRP lining 

works. The storekeeper shall inform the QA/QC Engineer and provide him 

with a copy of the delivery note. The QC Engineer shall inspect the 

delivery and if acceptable raise a “material inspection request" for 

Engineer approval. Ensure you to protect the products during delivery, 

handling and storage from weather, damage or staining with suitable 

packing and wrapping.  

2. The materials shall store in a clear ground, concrete or damp surfaces on 

suitable packers spaced to prevent distortion. 

3. The materials shall be stored in a clear ground, concrete or damp surfaces on 

suitable packers spaced to prevent distortion. 

4. The storage area shall be kept secure from unauthorized access. Keep 

other combustible products out of liquid storage area. Keep suitable fire 

extinguishers in accessible adjacent locations. 

Execution & Application: - 

1. The concrete surface must be minimum 30 days of age before receiving 

the GRP lining system. 

2. Concrete surface grinding, repairing must be done to remove all 

irregularities to become the surface linear. Moreover, the grinded surface 

has more porosity which will ensure a stronger bonding with resin. 

3. After grinding, accumulated concrete powder and debris must be removed properly. The surface should be rough and dry. 

4. The surface shall be free from standing water. 

5. Pipes/Sleeves, Conduits, drains or any other penetrations shall be in 

place, secure and protected prior to the application. 

6. Application of the GRP lining system shall be carried out by Image Fibre 

glass Industry LLC professional supervisor along its team and shall visit 

the site to ensure that the concrete surface is ready to receive GRP works 

and is properly prepared as per manufacture's requirement. 

7. WIR will be raised to the Engineer for approval after the completion of 

surface preparation. 

Application of GRP Lamination.  

  • GRP Angle fillet should be provided with all corners of U/G Water Tank. 
  • Extra Stiffeners will be provided for all joints. 
  • Minimum 10-20cm Overlapping for each joint. 
  • The working area of the concrete wall surface will be primed with one coat of G.P resin. 
  • Apply Five Layers of Chopped Strand mat above the primed Surface with Orthophthalic resin.
  • The Two Coat of Orthophthalic Gel Coat will be applied on the lining to cover The Exposed Fiber/ Pinholes. 
  • All work done is to be protected from dust & sunlight and allow for drying & curing for 24 hrs. 
  • This procedure is adopted for the walls, Floors & Ceiling. 
  • The Maximum Total Thickness of 5 mm of GRP lamination will be achieved. 
  • After completing all the work allow for drying then inspect the area of lining. 
  • The water test will be conducted once the GRP Lamination is fully cured for 48 hrs. 
  •  Adequate ventilation shall be provided inside the water tank. 
  • Safe Access shall be provided during the GRP application.  

Method Statement for GRP Lining & Ladder in Water Tank  

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