METHOD STATEMENT FOR STORAGE TANKS

1500 MTPD Phosphoric Acid plant 4500 MTPD Sulphuric Acid plant METHOD STATEMENT Project 1500 MTPD Phosphoric Acid plant 4500 MTPD Sulphuric Acid plant Method Statement No CIVIL ELECTRICAL MECHANICAL INSTRUMENTATION Date Name Date Name Prepared by Reviewed by Safety Release QA/QC Approval Approved by Section Engineer Construction Manager Safety manager QA / QC Manager Project Manager Site Manager METHOD STATEMENT FOR STORAGE TANKS WITH ROOF Rev-0 Page 1500 MTPD Phosphoric Acid plant 4500 MTPD Sulphuric Acid plant METHOD STATEMENT INTRODUCTION The following is the method statement for the erection of Carbon Steel storage tanks with roof by Jacking method and covers the following tanks a) Fulisilic acid storage Tanks-2nos (234-R-01A/B) b) Sulphuric acid product storage tanks-3nos c) Potable water tank-1nos (245-R-01) d) Diesel storage tank-1nos (246-R-01) e) Molten sulphur tank -1nos It comes under Sulphuric & Phosphoric acid plant Function and location, General Description, Scope of Work a) Function and Location The function of the storage tank is to store the Concentrated acid / Weak acid / Effluent for Maturation/Storage purposes, and it was located in phosphoric acid plant area b) General Description a) Fulisilic Acid storage Tank (234-R-01A/B) -2nos (DIA 12000MM / HEIGHT 18000MM / NO OF SHELLS 8NOS) b) Potable water storage tank-1nos (245-R-01) (DIA 4800 / HEIGHT 6050MM / NO OF SHELLS 3NOS) c) Diesel Storage Tank- 1nos (246-R-01) (DIA 11000MM / HEIGHT 8675MM / NO OF SHELLS 4NOS) d) Sulphuric Acid storage tank- 3nos (DIA 28500MM / HEIGHT 10000MM / NO OF SHELLS 5NOS) e) Molten sulphur Storage tank– 1nos (DIA22000MM / HEIGHT7840MM / NO OF SHELLS 4NOS) I-BEAMS of IPE-270 Ladders, Walk ways Flat forms and handrails etc Baffle plates Tank roof c) Scope of work Erection of I-Beams on the civil foundation and leveling Erection, Alignment, Fit up and welding of bottom base plate Inspecting welding with required NDT procedures like DP Test, Radiography, and Vacuum box UT etc (refer-ITP) METHOD STATEMENT FOR STORAGE TANKS WITH ROOF Rev-0 Page 1500 MTPD Phosphoric Acid plant 4500 MTPD Sulphuric Acid plant METHOD STATEMENT Erection, Alignment of Tank course shells by jockeying method Erection of roof Erection of Internal Baffle plates, Dip tube etc Erection of Walk ways, staircase, Agitator support, Hand railing Erection of Ladders, Flat forms and Hand rails Related Documents a) b) c) d) e) f) g) h) Technical specifications Approved construction drawings Weld map Release of material for construction form SNC Lavalin Release certificate starting of erection over civil foundation from MID Vendor’s instruction/manual required I.T.P (Inspection Test Plan) All last revisions of Drawings, WPS, PQR, Welder certificated, etc Required Material Testing, during and before work Material grade to be confirmed for WPS/PQR/WELD Qualification Batch number, Heat number punched on the plate to be compared with Mill certificate Environmental and Safety All the lifting tools gear like slings, belts, D-Shackles etc are of Tested & Certified by the TPI Cranes involved in Erection are certified by TPI All the PPE used for the work is of approved quality All the Workers, Staff, Engineers involved in work are geared with full basic PERSONAL PROTECTION EQUIPMENT TOOL BOX TALK will be conducted on daily basis at the starting of the job When working at height above 1.5mts from the ground every person to be wearing a safety belt When working at height proper scaffolding will be provided for accessing, testing, inspection for the client Scaffolding work will be done by properly trained and certified workers only under the supervision of Engineer Entry Permit system for usage of scaffolding will be practiced METHOD STATEMENT FOR STORAGE TANKS WITH ROOF Rev-0 Page 1500 MTPD Phosphoric Acid plant 4500 MTPD Sulphuric Acid plant METHOD STATEMENT While starting of welding, gas cutting, grinding, gouging operations HOT WORK permit system will be practiced All the gas cutting torches are installed with approved Flash back arrestors All the welders are with proper hand gloves, Apron, Face shield and other additional required safety gears While working in confined space CONFINED SAPCE ENTRY PERMIT system will be practiced All the power tools are of certified and tagged properly All the power, welding cables are of certified and tagged properly For handling Plates special lifting tools like horizontal and vertical plate lifting tools are used Good housekeeping will be practices at all the time Fire extinguishers are kept near the work for any fire incidents Gas cylinders are stationed during work so that they maintain required distance from the heat source Best engineering will be practiced to avoid accidents Detail of work supported with sketches and with special highlight for details • Extension of I Beams to the required length (Refer to QI(QUALITY INTERNATIONAL) procedures) • Inspection of welding • Erection of I-Beams on slab • Aligning & Leveling of I-Beams • Anchoring of I-Beams of to the concrete foundation.(Hold) • Erection of Bottom base Plate on the I-Beams • Fit-up and Welding of Bottom base plate • Inspection of welding By Penetration, RT, and Vacuum test • Erection of Shell-5 plate on the bottom base plate and alignment with fit up • Vertical welding of shell-5 • Inspection of vertical & Horizontal by RT through 10% of the total length of the welding • Erection of shell-6 on the top of shell-5 and followed by alignment, fit up and welding of vertical & horizontal welding • Inspection of vertical & Horizontal by RT through 10% of the total length of the welding and 100% RT of the T-Joints • Erection and fabrication of Roof METHOD STATEMENT FOR STORAGE TANKS WITH ROOF Rev-0 Page 1500 MTPD Phosphoric Acid plant 4500 MTPD Sulphuric Acid plant METHOD STATEMENT • • • • • • • • • • • • • • • • • • • • • • • • • • • • Installation and fabrication of available Baffle plates Erection of Hydraulic jacks inside the tank and distribute symmetrically such that every jack per meter of the circumference Installation, erection of walk ways and hand railings if advised Lifting of the shell-5 by 2450mm height by hydraulic jacks Erection, alignment and fit up of shell-4 Welding of horizontal and vertical welds Inspection of vertical & Horizontal by RT through 10% of the total length of the welding and 100% RT of the T-Joints Lifting of the shell-4 by 2450mm height by hydraulic jacks Erection, alignment and fit up of shell-4 Welding of horizontal and vertical welds Installation and fabrication of available Baffle plates Inspection of vertical & Horizontal by RT through 10% of the total length of the welding and 100% RT of the T-Joints Lifting of the shell-4 by 2450mm height by hydraulic jacks Erection, alignment and fit up of shell-3 Welding of horizontal and vertical welds Installation and fabrication of available Baffle plates Inspection of vertical & Horizontal by RT through 10% of the total length of the welding and 100% RT of the T-Joints Lifting of the shell-3 by 2450mm height by hydraulic jacks Erection, alignment and fit up of shell-2 Welding of horizontal and vertical welds Installation and fabrication of available Baffle plates Inspection of vertical & Horizontal by RT through 10% of the total length of the welding and 100% RT of the T-Joints Lifting of the shell-2 by 2450mm height by hydraulic jacks Erection, alignment and fit up of shell-1 Welding of horizontal and vertical welds Installation and fabrication of available Baffle plates Inspection of vertical & Horizontal by RT through 10% of the total length of the welding and 100% RT of the T-Joints Welding of Bottom shell -1to the Bottom base plate METHOD STATEMENT FOR STORAGE TANKS WITH ROOF Rev-0 Page 1500 MTPD Phosphoric Acid plant 4500 MTPD Sulphuric Acid plant METHOD STATEMENT • Installation of Nozzle, pipe supports, flat forms, ladders, agitator supports and handrails Curing and Weather Protection All the plate will be supplied with sand blasted and primer coated by QI All the welding edges will be protected by tape while painting Any additional welding made on painted are will be power brushed and coated again For locations with scratches, burns on painting etc during erection will be painted again.(rev-1) Show hold points for internal and external required inspection including specified tests on products Fit up inspection for levels, weld gaps, etc Vacuum test of welding of the bottom base plate While welding Test of root pass with penetration test Horizontal and vertical welds 10 % of the total length by RT RT test for the T-Joints by 100% Construction Equipment to be used , including standby Arrangement for breakage While the shells are erected by Jacking of the top shells with Hydraulic Lifting Jacks which are activated by a power pack A standby power pack is available for breakage And numbers of spare hydraulic hoses are available for breakage 10 Lifting equipment, involved (where applicable, crash, tower crane…test and location) For handling of plates cranes will be used for shifting, lifting, erection and purposes 11 Tools and associated other contractors Apparatus involved in this The following tools are involved in work • Welding Rectifiers machine • Gas cutting torch • Grinding machines of different sizes (100mm, 125mm and 150mm) • Owen for baking of electrodes 12 Manpower involved and Trades, who does what and when Supervisor for Tanks: - He takes care of all the activities associated in erection and fabrication of tanks and he involved in all the activities from staring to the finishing Riggers: - These will involve in handling the plates for erection, alignment etc METHOD STATEMENT FOR STORAGE TANKS WITH ROOF Rev-0 Page 1500 MTPD Phosphoric Acid plant 4500 MTPD Sulphuric Acid plant METHOD STATEMENT Fabricator/ Fitter: - He is responsible for fit ups, alignments, verticality and tolerances of the total tank Lifting Forman/ Jacking Specialist: - He takes the takes the lead role in alignment and positioning of Hydraulic lifting Jacks, He takes the leading role in lifting of the tank shells at every step Pipe Fitter: - He takes the fit up of nozzles and other pipe supports and structural items Welders: - These will all the welding operations Grinders: - These will grinding operation for the tank Helpers: - These are the general helpers to skilled workers involving in job Crane operator: - These will operate the crane QA/QC Team: - These will guide the job for required QA/QC levels 13 Work Schedule Requirements’ and Timing for This work For this job the daily regular work hours will be 10 hrs excluding lunch time From 7-00Am to 6-00PM On weekly half’s required core skilled workers like welders will be engaged if necessary 14 Training and Orientation for the Team For all the team members TOOL BOX TALK will be conducted at the beginning of activity on daily basis The scaffolding team will be of trained and certified The crane operator will be of trained and certified The riggers involved will be of trained and certified Regular monitor of welders and if necessary training will be given regularly 15 Tests on Systems (QA /QC ) Radiographic Test of all T-Joints by 100% Vertical & Horizontal welding RT by 10 % of the total length of the welding Vacuum test for the Base plate Dye Penetrate Test for all Root pass and Final In case Repair is needed, extension shots (penalty) to be match with API650 To be advised for any other test is needed 16 Logistics involved if work is expected to extend beyond normal working hours Lighting while working at night Shade protection while the wind velocity is very high METHOD STATEMENT FOR STORAGE TANKS WITH ROOF Rev-0 Page 1500 MTPD Phosphoric Acid plant 4500 MTPD Sulphuric Acid plant METHOD STATEMENT 17 Annexes and sketches lists WEIGHTS OF THE INDIVIDUAL MATERIALS for crane, lifting gear selection purpose IPE 270 TANK BOTTOM BEAMS CS Plate of 2400mm Width X 12000mm Length mm X 16mm Thick = 3.617 Tones METHOD STATEMENT FOR STORAGE TANKS WITH ROOF Rev-0 Page 1500 MTPD Phosphoric Acid plant 4500 MTPD Sulphuric Acid plant METHOD STATEMENT METHOD STATEMENT FOR STORAGE TANKS WITH ROOF Rev-0 Page 1500 MTPD Phosphoric Acid plant 4500 MTPD Sulphuric Acid plant METHOD STATEMENT METHOD STATEMENT FOR STORAGE TANKS WITH ROOF Rev-0 Page 10 1500 MTPD Phosphoric Acid plant 4500 MTPD Sulphuric Acid plant METHOD STATEMENT Erection, fit up and welding of bottom plate segments Erection of 1st shell plate on bottom plate METHOD STATEMENT FOR STORAGE TANKS WITH ROOF Rev-0 Page 13 1500 MTPD Phosphoric Acid plant 4500 MTPD Sulphuric Acid plant METHOD STATEMENT METHOD STATEMENT FOR STORAGE TANKS WITH ROOF Rev-0 Page 14 1500 MTPD Phosphoric Acid plant 4500 MTPD Sulphuric Acid plant METHOD STATEMENT Complete erection, fit up & vertical welding of 5th shell Erection of 6th shell plate on 5th shell by conventional method Keeping vertical joints plates adjoining courses a minimum of 600mm apart METHOD STATEMENT FOR STORAGE TANKS WITH ROOF Rev-0 Page 15 1500 MTPD Phosphoric Acid plant 4500 MTPD Sulphuric Acid plant METHOD STATEMENT Complete erection, fit up, vertical & horizontal welds of 6th shell Erection, fit up, welding of spiral stair case for the shells completed Erection, fit up, welding of Baffles and stair case subjected to availability of material for 5th & 6th shells METHOD STATEMENT FOR STORAGE TANKS WITH ROOF Rev-0 Page 16 1500 MTPD Phosphoric Acid plant 4500 MTPD Sulphuric Acid plant METHOD STATEMENT Erection fabrication of Tank Roof before jacking METHOD STATEMENT FOR STORAGE TANKS WITH ROOF Rev-0 Page 17 1500 MTPD Phosphoric Acid plant 4500 MTPD Sulphuric Acid plant METHOD STATEMENT Lifting of 5th & 6th shells by hydraulic jacks METHOD STATEMENT FOR STORAGE TANKS WITH ROOF Rev-0 Page 18 1500 MTPD Phosphoric Acid plant 4500 MTPD Sulphuric Acid plant METHOD STATEMENT 4th shell 1st plate erection, alignment on bottom plate METHOD STATEMENT FOR STORAGE TANKS WITH ROOF Rev-0 Page 19 1500 MTPD Phosphoric Acid plant 4500 MTPD Sulphuric Acid plant METHOD STATEMENT 4th shell 2nd plate fit up Complete erection, fit up and vertical welding of 4th shell Jockeying down the 5th shell to align with the 4th shell, fit up and completion of horizontal welding Erection, fit up, welding of Baffles plates, staircase etc subjected to availability of material and approval for 4th shell METHOD STATEMENT FOR STORAGE TANKS WITH ROOF Rev-0 Page 20 1500 MTPD Phosphoric Acid plant 4500 MTPD Sulphuric Acid plant METHOD STATEMENT Lifting of 4thshell for 3rd shell erection Erection of 3rd shell first plate METHOD STATEMENT FOR STORAGE TANKS WITH ROOF Rev-0 Page 21 1500 MTPD Phosphoric Acid plant 4500 MTPD Sulphuric Acid plant METHOD STATEMENT Erection fit up of 3rd shell 2nd plate Complete erection, fit up and vertical welding of 3rd shell plates METHOD STATEMENT FOR STORAGE TANKS WITH ROOF Rev-0 Page 22 1500 MTPD Phosphoric Acid plant 4500 MTPD Sulphuric Acid plant METHOD STATEMENT Jockeying down to align top shells with 3rd shell, horizontal welding of 4th & 3rd shells Erection, fit up, welding of Baffles plates, staircase etc subjected to availability of material and approval for 3rd shell Lifting the 3rd shell for 2nd shell erection METHOD STATEMENT FOR STORAGE TANKS WITH ROOF Rev-0 Page 23 1500 MTPD Phosphoric Acid plant 4500 MTPD Sulphuric Acid plant METHOD STATEMENT Erection of 2nd shell first plate Complete erection, fit up and vertical welding of 2nd shell METHOD STATEMENT FOR STORAGE TANKS WITH ROOF Rev-0 Page 24 1500 MTPD Phosphoric Acid plant 4500 MTPD Sulphuric Acid plant METHOD STATEMENT Jockeying down for alignment, fit up & horizontal welding between 2nd shell & 3rd shell Erection, fit up, welding of Baffles plates, staircase etc subjected to availability of material and approval for 2nd shell Lifting 2nd shell for 1shell erection and fit up METHOD STATEMENT FOR STORAGE TANKS WITH ROOF Rev-0 Page 25 1500 MTPD Phosphoric Acid plant 4500 MTPD Sulphuric Acid plant METHOD STATEMENT 1st shell first plate erection, fit up 1st shell complete erection, fit up & vertical welding of shell METHOD STATEMENT FOR STORAGE TANKS WITH ROOF Rev-0 Page 26 1500 MTPD Phosphoric Acid plant 4500 MTPD Sulphuric Acid plant METHOD STATEMENT Jockeying down 2nd shell to align, fit up and horizontal welding of 2nd shell and 1st shell Erection, fit up, welding of Baffles plates, staircase etc subjected to availability of material and approval Fillet welding of bottom plate to 1st shell METHOD STATEMENT FOR STORAGE TANKS WITH ROOF Rev-0 Page 27 [...]... STATEMENT FOR STORAGE TANKS WITH ROOF Rev-0 Page 16 1500 MTPD Phosphoric Acid plant 4500 MTPD Sulphuric Acid plant METHOD STATEMENT Erection fabrication of Tank Roof before jacking METHOD STATEMENT FOR STORAGE TANKS WITH ROOF Rev-0 Page 17 1500 MTPD Phosphoric Acid plant 4500 MTPD Sulphuric Acid plant METHOD STATEMENT Lifting of 5th & 6th shells by hydraulic jacks METHOD STATEMENT FOR STORAGE TANKS WITH... plant METHOD STATEMENT METHOD STATEMENT FOR STORAGE TANKS WITH ROOF Rev-0 Page 11 1500 MTPD Phosphoric Acid plant 4500 MTPD Sulphuric Acid plant METHOD STATEMENT Isometric view of foundation after erection of I beams Close up view of foundation, I Beams and bottom plate METHOD STATEMENT FOR STORAGE TANKS WITH ROOF Rev-0 Page 12 1500 MTPD Phosphoric Acid plant 4500 MTPD Sulphuric Acid plant METHOD STATEMENT. .. material and approval for 4th shell METHOD STATEMENT FOR STORAGE TANKS WITH ROOF Rev-0 Page 20 1500 MTPD Phosphoric Acid plant 4500 MTPD Sulphuric Acid plant METHOD STATEMENT Lifting of 4thshell for 3rd shell erection Erection of 3rd shell first plate METHOD STATEMENT FOR STORAGE TANKS WITH ROOF Rev-0 Page 21 1500 MTPD Phosphoric Acid plant 4500 MTPD Sulphuric Acid plant METHOD STATEMENT Erection fit... plate METHOD STATEMENT FOR STORAGE TANKS WITH ROOF Rev-0 Page 13 1500 MTPD Phosphoric Acid plant 4500 MTPD Sulphuric Acid plant METHOD STATEMENT METHOD STATEMENT FOR STORAGE TANKS WITH ROOF Rev-0 Page 14 1500 MTPD Phosphoric Acid plant 4500 MTPD Sulphuric Acid plant METHOD STATEMENT Complete erection, fit up & vertical welding of 5th shell Erection of 6th shell plate on 5th shell by conventional method. .. erection METHOD STATEMENT FOR STORAGE TANKS WITH ROOF Rev-0 Page 23 1500 MTPD Phosphoric Acid plant 4500 MTPD Sulphuric Acid plant METHOD STATEMENT Erection of 2nd shell first plate Complete erection, fit up and vertical welding of 2nd shell METHOD STATEMENT FOR STORAGE TANKS WITH ROOF Rev-0 Page 24 1500 MTPD Phosphoric Acid plant 4500 MTPD Sulphuric Acid plant METHOD STATEMENT Jockeying down for alignment,... availability of material and approval for 2nd shell Lifting 2nd shell for 1shell erection and fit up METHOD STATEMENT FOR STORAGE TANKS WITH ROOF Rev-0 Page 25 1500 MTPD Phosphoric Acid plant 4500 MTPD Sulphuric Acid plant METHOD STATEMENT 1st shell first plate erection, fit up 1st shell complete erection, fit up & vertical welding of shell METHOD STATEMENT FOR STORAGE TANKS WITH ROOF Rev-0 Page 26 1500... apart METHOD STATEMENT FOR STORAGE TANKS WITH ROOF Rev-0 Page 15 1500 MTPD Phosphoric Acid plant 4500 MTPD Sulphuric Acid plant METHOD STATEMENT Complete erection, fit up, vertical & horizontal welds of 6th shell Erection, fit up, welding of spiral stair case for the shells completed Erection, fit up, welding of Baffles and stair case subjected to availability of material for 5th & 6th shells METHOD STATEMENT. .. plates METHOD STATEMENT FOR STORAGE TANKS WITH ROOF Rev-0 Page 22 1500 MTPD Phosphoric Acid plant 4500 MTPD Sulphuric Acid plant METHOD STATEMENT Jockeying down to align top shells with 3rd shell, horizontal welding of 4th & 3rd shells Erection, fit up, welding of Baffles plates, staircase etc subjected to availability of material and approval for 3rd shell Lifting the 3rd shell for 2nd shell erection METHOD. .. STORAGE TANKS WITH ROOF Rev-0 Page 18 1500 MTPD Phosphoric Acid plant 4500 MTPD Sulphuric Acid plant METHOD STATEMENT 4th shell 1st plate erection, alignment on bottom plate METHOD STATEMENT FOR STORAGE TANKS WITH ROOF Rev-0 Page 19 1500 MTPD Phosphoric Acid plant 4500 MTPD Sulphuric Acid plant METHOD STATEMENT 4th shell 2nd plate fit up Complete erection, fit up and vertical welding of 4th shell Jockeying... MTPD Phosphoric Acid plant 4500 MTPD Sulphuric Acid plant METHOD STATEMENT Jockeying down 2nd shell to align, fit up and horizontal welding of 2nd shell and 1st shell Erection, fit up, welding of Baffles plates, staircase etc subjected to availability of material and approval Fillet welding of bottom plate to 1st shell METHOD STATEMENT FOR STORAGE TANKS WITH ROOF Rev-0 Page 27