METHOD STATEMENT1.INTRODUCTIONThis Method Statement describes the specific safe working methods which will be

used by ------------------ to carry out the construction new storage facilities.2.SCOPEThis document covers the scope of work required for the

execution of the tank construction. The method statement is in the following sequence as the work will becarried out.

Tank specific design and drawings

Construction of new tank foundation

Plate, structural steel and tank component procurement

Floor, shell and roof plate fabrication

Installation of new floor plate and double deck roof 

Fire protection system

Instrumentation and electrical works

Demolition of tank foundation, floor and roof 

Tank decommissioning

Tank isolation

Tank cleaning

Tank conditional inspection survey

Blasting and painting works

Hydro-testing

Calibration

Hook up to existing process

line, commissioning and demobilisation

3.REFERENCES

API 650: Welded steel storage tanks for Oil Storage

API MPMS 3.1B: Manual of Petroleum Measurement Standards Chapter 3 – Tank Gauging (Section 1B: Standard Practice for

Level measurement of LiquidHydrocarbons in Stationery Tanks by Automatic Tank Gauging)Method Statement1 of 17

 

Recommended Practice 14FZ: Recommended practice for Design and Installation of Electrical Systems for Fixed and Floating

Offshore Petroleum Facilities for Unclassified and Class1, Zone 0, Zone 1 and Zone 2 Locations

 NFPA 30: Flammable and Combustible

Liquid Code-2000 Edition

BS 8110: Structural use of Concrete in Building4.LIST OF EQUIPMENT

30 ton mobile crane

Flat deck/low bed trailer 

Semi automatic welding machine

DC welding machines (400A)

Air compressor 

Sand blasting set

Spray painting set

Wheel loader 

Tipper truck 

Mini dumper truck 

Fuel tanker 

Power generating set (30kVA,

50kVA, 60kVA, 100kVA)

 NDT Equipment

Man Lifting Equipment (25m Boom height)

Dewatering pumps

Pneumatic power winch

Pneumatic air winch5.SITE PERSONNELC o n s t r u c t i on M a n a g e r1 S i t e

E n g i n e er 2 H S E O f f i c e r1 Q A / Q C O f f i c e r1 Q A E n g i n ee r 2 Q C I n s p e c to r 2 S i t e

S u p e r v i so r 1 P i p e / P la t e W e l d e r s 6Method Statement2 of 17

G r i t B l a s t e rs 4 O p e ra t o r s8

6.WORK SEQUENCE AND METHOD6.1.Tank Specific Design And DrawingsThe following elements design shall be considered for adequacy in

accordance with therelevant codes and standards as may be applicable and any findings communicated to theCOMPANY for review and approval before

changes will be effected.

The tank foundation shall be verified in accordance with appendix B of API650:2005 and BS 8110

The floor and annular plates shall be verified in accordance with the requirements of clauses 4.4 and 4.5 of API 650:2005

The shell plates shall be verified in accordance with the requirements of clauses 4.6of API 650:2005

Roof and other roof accessories shall be verified

to meet the requirement of Clause4.10 of API 650:2005

 Nozzles shall be verified to meet the requirement of clauses 4.7.6 for shell and

4.8.5for roof of API 650:2005

The piping system shall be verified to meet the requirement of ASME B31.36.2.Plates, Structural Steel And Diesel

Storage Tank Components Procurement

Steel plate and sections procured shall be accompanied with their mill certificates

Samples shall be taken from the procured materials to confirm that the chemical andmechanical materials conform with the requirement of

clause 4 of API 650: 20056.3.Cutting, Forming and FabricationPlate material shall be straight and/or flattened by pressing or rolling audtties

 shall bedone before the material is processed in any way.

MarkingTo enable the various

fabricated components to be assembled together correctly on site, each part shall be marked with unique numbering system asshowed

on the “Approved for Construction” drawings.Method Statement3 of 17