Carrying out rerouting of existing 12.75 OD pipe section of PMBPL by Horizontal Directional Drilling (HDD) method hook up through hot tapping method on existing pipeline section at ch 49.926 km

Gandak HDD Non ITC

#Design, detailed engineering & installation of pipeline / pipeline & OFC conduit across rivers, NH, SH, Expressways, Railways, etc by HDD method. #Complete work for the crossing (between the limits, as indicated in the approved drawings) including mobilization & de-mobilization at site(s), supply of all materials as per the `Scope of Supply' and all consumables, equipment, manpower & other re sources and arranging the required land for site preparations and execution of, but not limited to, the following works in accordanc e with the specifications, drawings and as per all provisions of the contract document and instructions of the Owner. #Interpretatio n of data of hydrological / geo-technical surveys furnished by the Owner, carrying out fresh topographic survey of the rivers, NH, S H, Expressways, Railways, etc & developing new profile drawing for the crossing location, carrying out additional surveys required f or collecting data relevant to design and construction of the crossing, performing all engineering & design calculations, preparatio n of all necessary construction drawings for approval of the Owner as per the provisions of contract document, preparation of detail ed construction method statement and design analysis. #Taking delivery and transportation of Owner-supplied 3LPE coated pipes to the work site from designated stockpile location, inspection of the coated pipes visually and/or with holiday detector for defects, inc luding arranging all necessary intermediate storage area required thereof till the pipes are installed in permanent position. #Compl ete site preparation including arranging of required land, setting up of fabrication yard, preparation of temporary arrangement for pipeline stringing, launching etc. #Carrying out repair of pipe defects, replacement in the case of non-repairable defects and repai ring damages to pipe coating including defects/ damages occurring during transportation and handling. #Pre-construction surveys and collection of all necessary data. #String preparation including repair of pipe and pipe coating defects, welding, non-destructive te sting of welds including 100% radiography (by X-ray), supply of films & all equipment and providing all facilities to Owner's repres entative(s) for examining radiographs, repair of defects in the.........Continued

....in Continuation of previous.......welds and re-testing etc. #Coating of the field joints of the pipe string to be installed by H DD method with DIRAX heat shrink sleeves of M/s Raychem's make, DDXTM Directional Drilling Kit of M/s Canusa or of any other approve d make used for HDD crossings. #Repair of all coating damages in the pipe section to be laid by HDD method by full encirclement slee ves using suitable cut sections of approved quality of heat shrink sleeves of M/s Raychem make, DDXTM Directional Drilling Kit of M/ s Canusa or of any other approved make. #Fabrication of 89mm OD steel conduit with an inner duct of 40mm OD HDPE pipe for OFC (where ver OFC has to be laid along with the carrier pipeline). #Supply & fixing of easy to install heat shrinkable duct end caps for HDPE conduit for OFC (wherever OFC has to be laid along with the carrier pipeline). #Carrying out air cleaning, gauge pigging and pre-ins tallation hydrostatic testing of the complete pipeline string, as per the specifications, including repair of defects and retesting etc. #Installation of the pipeline / pipeline and OFC conduit as a bundle crossing below the rivers, NH, SH, Expressways, Railways, etc by single horizontal directional drilling operation to the correct profile as per the approved drawings. #Carrying out post-inst allation hydrostatic testing of HDD pipe string (along with transition pipe section). #Carrying out post-installation coating survey as per approved procedure. #Restoration, clean-up and disposal of drilling fluid, waste and all other surplus materials etc. #Trans portation of surplus Owner-supplied pipes to the designated stockpile location of the Owner. #Preparation of as-built drawings and o ther records etc. #All other works not specifically listed herein, but required as per specifications, drawings, provisions of the c ontract document, calculations and construction method statement, leading to successful completion of the works. Note:-The Contracto r shall have the option for installation of 89 mm OFC conduit as Bundled HDD installation along with the HDD installation of carrier pipe OR as a separate HDD instalation. However, the payment and payment terms shall remain the same in both the cases.

HDD INSTALLATION (Carrier Pipe with OFC Conduit) FROM 101 TO 300 METERS

12.75" in Normal Soil

Carrying out Calliper survey for ascertaining the internal geometry of the installed pipeline sections including mobilization/ demob ilization of pigging tools, tackles, consumables, accessories and personnel by contractor at work site including magnetic pig, elect ronic geometry pig, preparation and cleaning of the pipeline sections by running series of foam pigs for cleaning the line from debr is, water & making it dry for launching calliper pigs, running of magnetic pig for cleaning of ferrous residue, launching and receiv ing the electronic & standard calliper pigs, data retrieval, interpretation of data and submission of reports in the form acceptable to the Owner, rectification of defects observed from calliper survey (if HDD is executed by the same contractor), including supply of all labour, materials, equipment & instruments, calliper pigs, fabrication of launching & receiving barrels, all complete as per specifications and directions of Site Engineer / Engineer-in-Charge.

DIAMETER

12.75"

Carrying out tieing-in and hook-up of the installed HDD sections including laying of transition piping upto 12 m for hook-up with ex isting Mainline on either side of HDD crossing including all excavation/ trenching in all kinds of soil including rock,transportatio n of coated pipe from owner's stackyard, cutting of pipe, pre-testing of pipe sections before hook-up, making field bends out of pre -tested pipes (pipes shall be supplied by Owner) to match the site requirement, welding, carrying out 100% radiography, field joint coating, holiday detection, repair of damaged coating, backfilling and making through the pipeline etc. complete in all respects as per specifications and directions of Engineer-in-Charge.

DIAMETER