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Wednesday, December 23, 2020

Method Statement for Installation of Sleeves and Puddle Flanges

1. Scope of Work

This method statement is applicable for Installation of Sleeves & Puddle Flange for [Project/Facility Name] in accordance with the specified standards and regulations in project specifications.

The Scope of activity includes the delivery to Worksite, installation, pre-commissioning, testing, commissioning and guarantee of the system as described in the specification/contract documents and drawings.

2. References

  • Approved Shop drawing
  • Specification (V: xyz)
  • Approved inspection of material delivered on site. 

3. Responsibility

The Project engineer shall be overall accountable for arranging the materials/substances as per worksite stipulation.

Site supervisor shall ensure workmanship and will also make sure that all the work is done by the skilled workforce.

QA/QC engineer shall ensure that all work is done as per approved drawings and material used is approved and coordinate with [Organization MEP] Coordinator for internal checking prior to final inspection to consultant.

4. Equipments / Tools

Following equipment/devices and or tools shall be organized before starting the activity.

  1. Tool box 
  2. Welding machine
  3. Welding cable
  4. Welding helmet
  5. Chipping hammer
  6. Welding holder & earthing holder
  7. Spanner
  8. Portable grinder
  9. Gloves
  10. Goggles

5. Work Sequence/Procedure

5.1 Installation of Puddle Flange

  • As per approved shop drawings and Invert Level, mark the centre and invert level of Sleeve on reinforcement /steel bars for water walls.
  • Steel fixing contractor to bend and clear the exact area for installing Sleeve.
  • Once the location is clear, position the Sleeve in the steel area.
  • Once the Sleeve is in proper location recheck the level and alignment.
  • Tie the sleeves with suitable wires with steel to avoid any misalignment while concreting.
  • Clearance for civil contractor to close the shutter with exact holes matching with Sleeve to proceed with concrete pouring.
  • All the work to be inspected at all stages by consultant engineer.

5.2 Installation of Puddle Flange

  • As per approved shop drawings and Invert Level, mark the centre and invert level of Puddle flange on reinforcement /steel bars for water walls.
  • Steel fixing contractor to bend and clear the exact area for installing puddle flange.
  • Once the location is clear, position the puddle flange in the steel area.
  • Once the puddle flange is in proper location recheck the level and alignment.
  • Clearance for civil contractor to close the shutter with exact holes matching with puddle flange to proceed with concrete pouring.

5.3 Welding Process for Weld Neck Flanges on Puddle Flange

  • Preparing face and edge of pipe piece of puddle flange (outer side application area pump room) with proper finishing tools (finishing grinder and other tools).
  • After the edges are prepared and cleaned, final checking for alignment and position.
  • Clearing the selected area in front (if required on height scaffolding tower to be prepared in accordance with safety requirements).
  • Get the permits for Electric arc welding at basement area with all safety requirements.
  • As per consultant’s approval using the weld neck “socket end “flange with inside and outside welding.
  • In case of galvanized pipe first galvanize coating to be removed by grinding or suitable procedure to reduce the smoke generation.
  • All the work to be inspected at all stages by consultant engineer.

6. Inspection & Testing Plan

  1. All the Sleeves & Puddle Flange Installation works shall be inspected as per the inspection & testing plan and inspection checklists. Results of inspection & testing shall be document on the inspection checklist forms.
  2. Refer to inspection & Testing Plan No: ABC

7. Inspection Checklist.

  • Inspection Checklist 
  • Work Inspection Requests

8. Attachments

  • Risk Assessment
  • Inspection Checklist 

Download File 

Method Statement for Installation of Sleeves and Puddle Flanges.

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