Rate Contract For M And I Related Works At Terminals, Afss And Rdis Under Rajasthan State Office-M&I CNTRCT FOR Punjab, Chandigarh UT & Plain Area of HP MECHANICAL -TANK M&I WORK (CR/FR Tanks) Submission of detailed design/ fabrication drawings for the differnt size of tanks for repair as recommended by IOCL. Item includ es submission of as built drawings (4 sets- in A3 size)including submission of drawings on a CD for complete tank after completion of tank fabrication/ repair work as per enclosed specifications. Note: The drawings should be made in reference to the attached dire ctional drawings and as per requirement of IS 803 & API 650. The item should be executed with prior approval from Engineering Depa rtment. 00040 Full Tank -Dia upto 20 mtrs irrespective for height of tank (CRVT/FRVT) 00050 Full Tank- Dia from 21m to 31 Mts. 00060 Full Tank- Dia from 31 to 55 Mtrs irrespective for height of tank (CRVT/FRVT) 00070 Submission of detailed design/ fabrication drawings for various components of the differnt size of tanks for repair as recommende d by IOCL. Item includes submission of as built drawings (4 sets- in A3 size)including submission of drawings on a CD for complete tank after completion of tank fabrication/ repair work as per enclosed specifications. Note: The drawings should be made in referen ce to the attached directional drawings and as per requirement of IS 803 & API 650. The item should be executed with prior approval from Engineering Department. 00080 Wind Girders upto 36 m dia tank & upto 20 m height 00090 Roof Structure upto 36 m dia tank & upto 20 m height 00100 Manholes and Nozzles 00110 Boxing up the manhole cover of the tank including supplying and fixing 3mm thick non metallic type CAF- 9 gaskets of approved make a s per IS 2712- 1979 with steel fasteners as per IS 1367- 1967 and washers of approved quality. 00120 Calibration of Tanks: (a) Bottom Calibration with actual physical measurement by water meter for bottom, water to be supplied by IOC , & (b) tank shell calibration by Strapping periphery of different Strakes above and below the horizontal joints including arranging for the stapping tape. Item includes cost towards Statutory authority Payment to be made to the authorities and all other incidenta l costs. Item Includes Preparation and Submission of Calibration charts in quadruplicate duly approved by tank calibration authority .The Scaffolding shall be paid extra under respective item. Water if reuiqred for filling above datum plate for full calibration of the tank shall be paid extra as per respective item in SOR.The job (rate) also includes boxing up of tanks with new Gasket/fastners as per Specifications of SOR sr. no. 2above 00130 1.000 Tank Dia upto 20 mtrs. 00140 1.000 Tank Dia from 21m to 31 Mts. 00150 1.000 Tank Dia from 31 to 55 Mtrs 00160 1.000 Supply of Mild Steel Plates of suitable width and length ranging in thickness from 5 mm to 28 mm as required, conforming to IS 206 2 Gr. B / IS 2062 E250B, Fully Killed (Un-trimmed and un-normalized condition of approved make). Rate should also include cost of inspection by IOCL approved 3rd Party inspection agency as listed elsewhere in the tender document. The item should be executed with prior approval from Engineering Department. 00170 Jacking of Tank: Jacking up of the tank to the required height by using hydraulic jacks of suitable capacity and hydraulic power pack for replacement of shell/bottom/annular plates or raising height of foundation etc.. The job includes supplying & welding of MS structural support required for jacks, other materials, machines, labour, etc complete. The cost includes making required base for jacks support. The j acks shall be removed after completion of work. Jacks are to be provided at a suitable distance for the entire circumference of the tank. Jack used should be able to sustain the ight of the tank upto max height of m. Distance between two jacks should not be more than 3M. 00180 Upto 20 M Dia 00190 Above 20 upto 30 M Dia 00200 Above 30 upto 40 M Dia 00210 Dismantling of shell plates of CRVT/FRVT at required height as directed, by gas/hacksaw cutting from the existing weld seams or po rtion of plate & removing the MS plates from the tank by mechanical means, with utmost precaution and neatly straightening and stor ing at place indicated by site engineer anywhere in IOC premises, complete, irrespective of lead and lift as directed. The rate incl udes the cost of labour, gases, providing necessary temporary supports, safety precautions etc., all necessary equipments, all nece ssary structures, clamps, suitable non-combustible material wedges, etc. complete to the satisfaction site-in-charge. All the scrap peices (as defined in tender) to be the property of the contractor, rebate against this should be considered while quo ting this item. Hydraulic jacking and scaffolding, if required will be paid separately. 00220 Fabrication, Handling, rolling, cutting, erection of shell plates using new plates supplied by IOC/ procured by contractor. The cos t includes 1. Fabrication of the plates as per approved drawings, Handling, rolling, cutting, bevelling, erection of MS plates as per IS 803 a nd attached drawings 2. The rate does not include welding of shell plates, DP Test and chalk kerosene test and other allied works as per relevant codes hich will be paid separately. 3. Radiography of shell joints, Hydro testing, scaffolding will be paid separately. 4. Plates if supplied by the contractor will be paid separately. 5. Preparation of plate cutting schedule & fabrication drawing is included in the scope of the item. 00230 Gas cutting of the shell to annular plate, bottom plate or shell butt welding joint along the seam neatly with minimum wastage and without damaging the existing shell plate. The job also includes: a) Any other weld joints- butt or fillet of max 25mm thick plate. b) Temporarily dismantling the 3 or 4 drain pipes inside the tank and re-installing the same after rectification of the tank. c) Stacking the cut plates properly as per site instructions. d) Cutting of shell to provide window for taking out dismantled plates or taking in new plates. 00240 Full Annular and Bottom Plate Replacement: Dismantling of annular plates/bottom plates of CRVT/FRVT as directed, by gas/hacksaw cut ting from the existing weld seams & removing the MS plates from the tank by mechanical means, with utmost precaution and neatly stor ing at place indicated by site engineer anywhere in IOC premises, complete, irespective of lead and lift as directed. The rate inclu des the cost of labour, gases, providing necessary temperory supports, safety precautions etc., all necessary equipments, all neces sary structures, clamps, suitable non-combustible material wedges, etc. complete to the satisfaction of site-in-charge. All the scrap peices (as defined in tender) to be the property of the contractor, rebate against this should be considered while quo ting this item. Jacking of shell, if required in case of replacemnet of annular/sketch plates (bottom plates below shell) will be pa id separately. 00250 Part Annular and Bottom PlateRreplacement: Dismantling of annular plates/bottom plates of CRVT/FRVT as directed, by gas/hacksaw cut ting from the existing weld seams & removing the MS plates from the tank by mechanical means, with utmost precaution and neatly storing at place indicated by site eng ineer anywhere in IOC premises, complete, irespective of lead and lift as directed. The rate includes the cost of labour, gases, pro viding necessary temperory supports, safety precautions etc., all necessary equipments, all necessary structures, clamps, suitable non-combustible material wedges, etc. complete to the satisfaction of site-in-charge. All the scrap peices (as defined in tender) to be the property of the contractor, rebate against this should be considered while quo ting this item. This item will be operated in case of part replacement of annular/sketch (bottom plates below shell) plates. Item in cludes jacking of respective shell, one by one, by suitable means (screw/hydraulic jacks) to enable removal/insertion of plates. 00260 Fabrication, laying, welding of annular plates/bottom plates using new plates supplied by IOC/ procured by contractor. The cost inc ludes 1. Fabrication of the plates as per approved drawings, shifting, laying, welding of the old plates for laying the bottom/ annular pl ate after proper edge preparation of new and old plates as per IS 803 and attached drawings including all testing as per API 653 exc luding radiography and hydrotesting which will be paid separately. 2. The underside of the bottom plates shall be provided with 600 microns thick shalimastic HD coat after manual cleaning to SSPC SP2 . 3) Plates if supplied by the contractor will be paid separately. 4)Preparation of plate cutting schedule & fabrication drawing is included in the scope of the item. 00270 Dismantling the roof plates of CRVT/FRVT including foam dam as required either partly or in full as directed, by gas/hacksaw cuttin g from the existing weld seams & removing the MS plates from the tank by mechanical means, with utmost precaution and neatly straig htening and storing at place indicated by site engineer anywhere in IOC premises, complete, irrespective of lead and lift as directe d. The rate includes the cost of labour, gases, providing necessary temporary supports, safe walk ladder, safety precautions etc., a ll necessary equipments, all necessary structures, clamps, suitable non-combustible material wedges, etc. complete to the satisfacti on of site-in-charge. Plan area and average thickness of roof plates will be considered for calculating the qty of dism antled plates, and weight of appurtenances will not be considered separately, and no extra payment for the same will be made. Note: Contractor has to submit the dismantling methodology clearly stating the restraining techniques to be involved so that circul arity of the undamaged shell plates remains undisturbed, prior to commencement of work and has to get it approved from IOCL. Plates and structures, appurtenances should be dismantled with utmost care as these could be reutilised. All the scrap pieces (as defined in tender) to be the property of the contractor, rebate against this should be considered while quo ting this item. 00280 Fabrication, erection , welding of roof plates including foam dam as required of CRVT/FRVT in part or full including preparation of fabrication drawings, transportation of free issue plates from the premises of IOC to work site, fabrication to required shape and curvature.erection, aligning, welding, heat treatment of plates wherever required for roof and reinforcement plates with IS 2062 steel plates supplied by corporation for cone/floating roof as per our specifications and drawing including all the test required fo r roof (excluding hydrotest) as per IS:803 & API 650 and all other items such as labour, gases, appropriate class of welding electro des and providing all equipments, machine fitting and erection tools and tackles, all temporary structures, clamp, wedges, etc. to complete the job in all respects as per our drawings/ specification/ site engineers instructions. Fabricated quantity and sectional weight of roof plates will be considered for payment. Fabrication to required shape and curvatur e, erection, aligning, welding, heat treatment of plates wherever required for roof and reinforcement plates for Cone Roof/Floating Roof tank as per our specifications and drawings including all the tests required for roof as per IS 803 and all other items such as labour, gases, welding electrodes and providing all equipments, machine fittings and erection tools and tackles, all temporary stru ctures, clamps, wedges, etc. to complete the job in all respects as per our drawings / specifications /site engineers instructions. Preparation of plate cutting schedule & fabrication drawing is included in the scope of the item. 00290 Supplying, fabricating, welding, erecting foam dam using 5 mm MS plates (IS 2062) on the upper deck, stitch welding etc inclusive of painting as per IOCL scheme.Preparation of plate cutting schedule & fabrication drawing is included in the scope of the item. 00300 Provision of IOCL LOGO( as per attached drawing) in AG Vertical Tanks / Horizontal Tanks irrespective of the Dia & height the Tan k. The scaffolding shall be paid separately . 00310 The dismantling of damaged roof supporting structural: Rate is inclusive of dismantling roof truss/girders/columns including gusset plates, cleats, supports, roof structural supports, angles, railing angles, flats, curb angles, etc. The theoretical sectional weight of structurals as per IOCs standard drawing will only be considered for calculating the tonnage of dismantled item. Weight of appurtenances will not considered for payment purpo se.Note: Contractor has to submit the dismantling methodology clearly stating the restraining techniques to be involved so that cir cularity of the undamaged roof structure members remains undisturbed, prior to commencement of work and has to get it approved from IOCL. The structures should be dismantled with utmost care as these could be reutilised. Scaffolding, if required will be paid separately. 00320 Provision of roof supporting structurals: Supply, fabrication, erection and welding of structural steel as per B&R/consultant drawing . Rate is inclusive of provision of trus s/girders/columns including gusset plates, cleat plates, supports, roof structural supports, angles, railing angles, flats, curb ang les, overflow pipe etc. including submission of detailed drawings. The theoretical sectional weight structurals will only be co nsidered for calculating the tonnage of item provided. Scaffolding, if required, will be paid separately. The structure is to be pre-fabricated to the extent possible and than erected to save time. 00330 Dismantling of structurals: Gouging / grinding and dismantling of hand rails, wind girders, corroded staircase including pad support channels of landing plat forms from all sides, support angle of staircase step from all sides the shell plates at the affected places. 00340 Supplying and fabricating and erecting structural steel members fabricated from rolled steel sections/plates/strips/Pipes, etc sprinkler supports/wind girders etc. including two coats of red oxide primer, provision of necessary erection bolts, nuts, washers cleats, stiffeners, gussets, base plate and all operation such as, but not limited to, preheating as per specifications, straighte ning, cutting, drilling, grinding etc. complete. Weight of erection bolt and welds shall not be considered for payment. Scaffolding, if required, will be paid separately. 00350 Rectification of welds in structures such as tank stairs, rolling latters, roof hand rails etc. including application of two coats o f red oxide primer and two coats of synthetic enamel paint over the welds. Measurement will be as per running meter of welding done. 00360 Splitting of top landing platform on CR Tanks by cutting the top landing from the rest of the stair and jointing it with hinges to e nable lifting of the top landing platform. 00370 Rectification of weld defects in Lap joints in Shell/bottom/roof plates by fine grinding and rewelding to ensure no further weld def ects. Welding to be carried out using electrode of appropriate class. 00380 Providing stitch welding on inner side of foam dam on roof top wherever the same is not provided and reducing size of slots on botto m of foam dam as required. 00390 Supply and Application of cold applied filling Material Polymer/reins in the gap in lap joint stitch welding on the under deck of Fl oating Roof Tank. Measurement will be per running meter of joint length treated with the polymer. The rate also includes all require d surface preparation, labour, tools and tackles etc. Scaffolding, if required, will be paid extra. 00400 Weld build-up of all deep pits at corroded sections of shell/roof/bottom/annular plates and wherever required using electrode of app ropriate class with minimum current application and ground flushing. Item will be measured in square meter of plate area bounded by pits built-up by welding. In case isolated pit(s) are weld build-up, minimum area paid will be 0.5 M2. 00420 Supplying and laying of stone aggregate to desired thickness with 10mm size metal premixed with bituminous binder (GradeVG 10) at 56 Kg/Cum, spreading with tack coat and compacted by light roller immediately after spreading premix etc. complete. 00430 Supplying and laying 1 mm thick LDPE liner confirming to IS 2508:1984, installation of LDPE sheet shall be made with a full tension overlap. Overlap shall be minimum 50 mm and overlaps shall be hot press welded to ensure no leakage through lapping. Measurement of works shall be only as per surface area as measured in drawings. Overlapping will not be considered for measurement of surface area. 00440 Filling of gaps between annular plate extension and sand pad with misture of bitumen and sand. Measurement will be per meter of the tank circumference filled with the mix. 00450 Carrying out repairs of rolling ladder by welding of hinges to ladder structure at either end/or putting cotter pins, correcting alignment of rolling ladder steps by adjusting the link etc 00460 Supplying, providing brass cladding to rolling ladder wheels by brazing as per standard drawing. 00470 Supply and providing proper copper bonding connection between the roof and rolling ladder with cable of size 50mm SQ PVC insulated c opper conductor, including replacement of damaged lugs etc required. 00480 Supplying, providing minimum 40 dia solid brass roller assembly gaugewell assembly for guiding movement in line with the appr oved drawing/scheme. 00490 Roof Appurtenances: Supply, fabrication, installation, welding, heat treatment if required including fabrication & fixing of nozzle necks, etc. Includi ng preparation of drawings, supply of gases electrodes and other consumables, supply and fixing of bolts, nuts and gaskets of approv ed make wherever required etc & labour material for completing the work as per drawings, codes/IOC specifications. Site engineer s instructions. NOTE: The new dip hatch is to be fixed in such a way that it is exactly above the datum plate and the reference ht. is not altered. 00500 a) Roof manhole-500 mm dia as per drg no.BR/CR/227 00510 b) 220 MM dia gauge hatch with spark proof cover as per drg.no BR/CR/273,274,275,276 ___________________________________________________________________________________ 00520 c) 250 mm dia free vent with nozzle as per drg no. BR/CR/278/R2 00530 d) Temperature hatch with nozzle 80 mm dia as per drg.no BR/CR/279. 00540 e) Sample hatch with nozzle of 100 mm dia as per drg no.BR/CR/277 00550 f) gauge hatch 150 MM dia as per drg no BR/CR/273 to BR/FR/277 00560 g) Additional nozzle 50 mm dia for level switch with Slip on flange and blind flange 00570 h) Provision of 1 no rim vent of dia as per B&R drawing and providing 6x 4 reducer for one existing) vent 00580 Replacement of necks (nozzles) of tanks with new necks (nozzles). Scope includes careful removal of welding between nozzles and she ll plates / reinforcement plate and between reinforcement pad and shell by light pencil grinding without damaging them, supply & fi xing of nozzle/manhole necks, reinforcement pad plate, rewelding of radio-graphic quality, radiography of neck joint of manhole, DP test of weld between each nozzle and reinforcement plate/shell plate to be done after root run and after complete welding, pneumatic test of reinforcement plate / shell plate to be done after welding completion at 15 psi and touch-up painting of nozzle, pad and we lded areas with zinc rich primer and Aluminium/Synthetic enamel finish paint of same shade as existing on the tank. Internal surface of manhole neck will be painted with one coat of zinc rich primer and two coats of epoxy tank liner, as per IS 803 and B&R drawings . In case the weld joint is found defective, rectification & testing will be done free of cost. All safety precautions to be adhered during hot work. Scope includes supply of all the materials, tools and tackles. Steel plates us ed shall conform to IS 2062 (for manhole neck). Material specification for nozzle (other than shell manholes) shall be seamless SA - 106 Gr. B when size is upto and including 250 mm. Neck of nozzle shall be fabricated from plates of material specification IS:226/20 62 when the size is more than 250mm. Scope of work also includes supply of flanges, making flange for shell manholes of 750 mm size from plates including supply of all the materials all complete, in case of damage to the same during gouging. All the scrapped/disma ntled material shall be property of the contractor. 00590 Manhole necks 00600 a) Upto Manhole 750 mm dia, 8 mm thick 00610 a) Upto Manhole 750 mm dia, 12 mm thick 00620 b) Manhole 750 mm dia, 18 mm thick 00630 c) Manhole 750 mm dia, 20 mm thick 00640 Nozzles 00650 a) 450 mm dia 12 mm thick 00660 b) 400 mm dia 12 mm thick 00670 c) 350 mm dia 12 mm thick 00680 d) 300mm dia 12mm thick 00690 e) 250 mm dia 12 mm thick 00700 f) 200mm dia 12mm thick 00710 g) 150mm dia 12mm thick 00720 h) 100 mm dia 10mm thick 00730 i) 80mm dia 8 mm thick 00740 j) 50 mm dia 6 mm thick 00750 Supply, fabrication, installation, welding, heat treatment if required including fabrication & fixing of cover plates on shell manh oles, etc. including preparation of drawings, supply of gases, electrodes and other consumables, supply and fixing of bolts, nuts co nforming to ASTM A193 GR.B7/A194 GR.2H and gaskets of approved make wherever required etc. and all labour material for completing th e work as per drawings, codes / IOC specifications and site engineers instructions (As per B&R drawing no. BR/CR/221) 00760 a) upto 975 mm OD, 12 mm thick 00770 b) upto 975 mm OD, 14 mm thick 00780 c) upto 975 mm OD, 16 mm thick 00790 d) upto 975 mm OD, 18 mm thick 00800 e) upto 975 mm OD, 20 mm thick 00810 Replacement of Bolting flanges of Manholes. Scope includes careful removal of welding between Bolting flange and nozzle neck by lig ht pencil grinding without damaging them, dismantling old bolting flange and stacking it at desired location at the site, supply & f ixing of Bolting flange, rewelding of radio-graphic quality, radiography of neck joint of manhole, DP test of weld between each nozz le and Bolting flange to be done after root run and touch-up painting of Bolting flange and welded areas with zinc rich primer and A luminium/Synthetic enamel finish paint of same shade as existing on the tank. In case the weld joint is found defective, re ctification & testing will be done free of cost. All safety precautions to be adhered during hot work. Scope includes supply of all the materials, tools and tackles. Steel plates us ed shall conform to IS 2062 (for manhole neck). 00820 a) For 750 mm dia manhole, 10 mm thick 00830 b) For 750 mm dia manhole, 12 mm thick 00840 c) For 750 mm dia manhole, 14 mm thick 00850 d) For 750 mm dia manhole, 16 mm thick 00860 Supply, fabrication, installation, welding, heat treatment if required including fabrication & fixing of cover plates of 6 mm thick ness and 500 mm dia in roof manholes, etc. including preparation of drawings, supply of gases, electrodes and other consumables, sup ply and fixing of bolts, nuts and gaskets of approved make wherever required etc. and all labour material for completing the work as per drawings, codes / IOC specifications and site engineers instructions (As per B&R drawing no. BR/CR/237 & 277) 00870 Dismantling of existing air vents of 6 inch dia by gas cutting and stacking at designated place within terminal and supply, fabrica tion, handling and fixing air vents of 10 inch LRB type as per IOCL drg. Ref. S-869 and fixing as per drg. Ref. BR/CR/278 includin g providing new nozzle on roof of 250 mm dia, SO flanges as required etc. Dismantled air vent material will be property of party and is to be taken by them. Rebate towards cost of scrap to be considered while quoting for this item. 00880 Providing Additional support legs for Floating roof as per B&R/FR/290 with 65mm NB Sch 80 MS Seamless Pipes , along with sleeve, c ollar, pin, painting etc complete in all respect 00890 Replacement of roof supporting legs with 65mm NB Sch 80 MS Seamless Pipes including application of primer and finish coat as per IOC specifications and provision of handle bar and notches. 00900 Providing notches in the bottom of the roof legs in Floating roof tanks. 00910 Design, development of drawings, selection of materials, manufacturing and supply of primary and secondary mechanical shoe seals fo floating roof tanks as per the specification for rim seals . Contractor to supply maximum possible length of the seal. Any overlap at the joints shall not be considered in the total supply length. (GI Type) 00920 Dismantling and re-installation charges for complete mechanical seal/foam seal Installation charges for complete mechanical seal (primary and secondary) supply of required labour and removal of existing foam eal including weather shield, foam, seal cover, holding down bars, nuts/bolts etc. and stacking the same at the designated place ins ide the terminal. The item includes charges for supervision by manufacturer, if required. Modification if any of the rim angle (by hot work, drilling and supply of material including rim angle, if required) for fixing of n ew mechanical also is included in the scope of contractor. 00930 Dismantling of Corroded Weather Shieldsand and replacement with new weather shield (GI Plates) plates of same size and same thickne ss of existing system with SS nuts, bolts, etc 00940 Dismantling of existing tank roof/shell apprutances i.e. Radar Guages, temp. sensor, Manholes, Roof Vent, central hatch, dip hatch Design, development of drawings, selection of materials, manufacturing and supply of primary and secondary mechanical shoe seals fo floating roof tanks as per the specification for rim seals . Contractor to supply maximum possible length of the seal. Any overlap at the joints shall not be considered in the total supply length. (GI Type) 00920 Dismantling and re-installation charges for complete mechanical seal/foam seal Installation charges for complete mechanical seal (primary and secondary) supply of required labour and removal of existing foam eal including weather shield, foam, seal cover, holding down bars, nuts/bolts etc. and stacking the same at the designated place ins ide the terminal. The item includes charges for supervision by manufacturer, if required. Modification if any of the rim angle (by hot work, drilling and supply of material including rim angle, if required) for fixing of n ew mechanical also is included in the scope of contractor. 00930 Dismantling of Corroded Weather Shieldsand and replacement with new weather shield (GI Plates) plates of same size and same thickne ss of existing system with SS nuts, bolts, etc 00940 Dismantling of existing tank roof/shell apprutances i.e. Radar Guages, temp. sensor, Manholes, Roof Vent, central hatch, dip hatch of gauge pipe sleeve by brazing and / or fixing to the nut/bolts of gauge well sleeve by means of strips. 01010 Supplying providing 6 mm thick, 2 ply neoprene gasket as per drawing in between flanges of existing 400 mm dia gauge well housing, providing nut/bolts etc as required. 01020 Supply and installation of Pressure vacuum relief valves with pressure setting of 75 mm water column and vacuum setting of 25 mm water column or as specified. 01030 a) 3(80 mm) dia 01040 b) 4(100 mm) dia 01050 c) 6(150 mm) dia 01060 Welding: Cleaning, gouging/grinding /bevelling as required and carrying out welding of joints of required size wherever required/left out on the tank after surface preparation by grinding if required. Item includes testing of weld joints by DP test, chalk kerosene etc, if required. Scaffolding , if required, will be paid separately. 01070 Fillet Weld 01080 a) 5-8 mm size 01090 b) Above 8 to 12 mm size 01100 Butt weld from one side for annular plate or both side for shell plates including back gouging as required, based on thickness of sh ell plate/annular plate to be welded etc. Incase welding of plates of different thickness, thickness of thinner plate will be consid ered. This item may also be operated for closing of window cut on shell for taking out dismantled plates or taking in new plates. 01110 a) 5-10 mm size 01120 b) Above 10 -20 mm size 01130 c) Above 20-30 mm size 01140 Supply, fabrication, installation & welding of sump on the bottom plate at lowest point. The sump shall be provided as per Drawing No. ENG/131 1/2. However the inner dia of the sump shall be 400 mm to enable insertion through shell manhole. Item includes supply o f MS plates of required thickness conforming to IS 2062. The vertical weld of the sump neck is to be fully radiographed. Also the un der side of the sump shall be applied with 3 coats of Shalimastic HD @ 200 Microns per coat aggregating 600 Microns after manual c leaning to SSPC SP2. 01150 Pontoons compartments to be tested individually with air pressure max. 0.5 Kg/sqcm by sealing compartment joints on top and hatch & checking by means of soap water on all joints to ensure the pontoons are free from pinholes/ leakages/ seepage etc. before re-commis sioning the tank. Rate is inclusive of all consumables,labour,tools & tackles,pressure gauges,machinery etc to complete the test in all respects. 01160 Replacement of existing drain pipe etc
