Tender For Repairs To Underwater Support For Horizontal Resting Of The Surya Flap Gate At Naval Dockyard Visakhapatnam Under Ge (I) Dm Visakhapatnam, Visakhapatnam-Andhra Pradesh
TDR : 47280227
Tender Notice
Corrigendum Details
BOQ
Expired
Visakhapatnam
Andhra Pradesh
Corrigendum : Tender For Repairs To Underwater Support For Horizontal Resting Of The Surya Flap Gate At Naval Dockyard Visakhapatnam Under Ge (I) Dm Visakhapatnam
Name of Work: REPAIRS TO UNDERWATER SUPPORT FOR HORIZONTAL RESTING OF THE SURYA FLAP GATE AT NAVAL DOCKYARD VISAKHAPATNAM UNDER GE (I) DM VISAKHAPATNAM.
Sl. No.
Item Description
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Material and labour for providing of underwater graphite cast iron lower hinge pedestals of Varuna Drydock Flapgate in machined condition complete all as specified under and as directed. (a) Scope involves Pattern and tool development, casting, fettling, stress relieving, machining, and painting with two coats of coal tar epoxy paint over a coat of zinc chrome primer and packing. (b) Firm is to undertaken underwater inspection by qualified divers and underwater videography to arrive the dimensions of existing pedestal. The diving is to be undertaken at a depth of approximately 11-15 metres below MRL in Varuna dock mouth. Videography shall be submitted in a CD alongwith an under water inspection report to department. (c) Firm is then required to prepare a detailed drawing of the existing pedestal arrangement which is to be used for manufacture of new pedestals. Three sets of detail drawings shall be submitted by the firm. Original drawings shall be submitted in tracing paper for approved of competent authority.
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(d) Material specifications are as follows:-(i) Lower hinge casting of grade: FG 300, IS 210, Hardness 180-230 BHN MAX and UTS:300N / mm2 (ii) The lower casting shall be from the refined metal and the casting shall be properly cooled under mould cooling process, supplied in fine machined condition as per the surface finish specification.(e) Dimensions for guidance is as follows:-(i) Width:- 2000x 2000 mm(ii) Pad height- 3 mm(iii) Pad material- Graphite cast iron(iv) Bearing HSG- 240 mm ,370+370 mm,240 mm(v) Hole- 65 Dia 4 Nos(vi) Hole to hole - 200 + 200 mm(vii) Height from bolt- 1038+125+10=1173(viii) Bearing HSG, pad -200 mm(ix) Holes- Dia 5809 Nos(x) Hole to Hole - 800-800-800-800 mm(xi) Bearing HSG, width - 240 mm (xii) Weight- Not exceeding 10,000 kgs
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(f) Following details with respect to manufacturing process shall be submitted by contactor for approval of competent authority.(i) Heat Treatment cycle(ii) Furnace Specifications and pouring temperatures.(iii) Method of pouring(iv) Casting magnetic particle Inspection Certificate.(v) NDT/ MPI as per AA 085 01 33 standards at level 2.(vi) Tensile test, Hardness test certified from third party NABL accredited test agency.(g)Dimension shall be co-related the measurement in the underwater inspection report. (h) The final dimensions, drawings and other parameters indicated in the above serials is to be certified by IRS/Lloyds/ABS or other DGFASLI recognised certification agency and the original certificate shall be submitted by contractor alongwith three sets of final drawing (one copy originaldrawing in tracing paper ) for approval of appropriate authority.
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