Scraper traps construction work (Not Applicable) General

4.12 Detailed Work Description .1 Pipeline

4.12.2 Scraper traps construction work (Not Applicable) General

Construction Works shall be understood as all construction activities including pre-commissioning which entails verification of all conformity to ensure that the built scraper traps are in conformance with the design, mechanically complete and ready for commissioning as per the Contract Documents.

All construction Works shall comply with approved construction drawings and specifications and all applicable codes standards and regulations outlined in the Pipeline Design Premise Doc. No. 3214.10.BGRA.16519

The construction Work to be performed by CONTRACTOR shall include but not limited to:

Supply all labour, plant, materials, consumables, supervision, fuel, electric power, tools, equipment, craneage, transport, accommodation and each and every item necessary for the accomplishment of the Work.

Supply of all materials necessary for the performance of the Work.

Carry out preparatory Work including concrete batching plant establishment and production of test cubes, welder qualifications, weld procedure specifications and procedure qualification. All tests, qualifications, procedures and specifications are for Company review, witness and Approval prior to commencement of the Work;

Provide setting out, levelling, establishing of temporary bench marks, monuments and final survey work;

Supply labour and equipment for de-watering, inclusive of treatment and piping to dispose of water to an approved discharge point adjacent to the Sites limits.

De-watering is Contractor’s responsibility, and CONTRACTOR shall at all times have suitable equipment on the Site;

Carry out Site preparation including provision for access fence and gates and any hard standings that may be required to carry out the Work;

Submit samples of items with relevant certificates for Approval prior to use, including slump and cube tests for concrete as required;

Carry out all testing as specified. Provide all documentation/certificates to validate material quality;

Carry out fabrication, erection and hydrostatic testing, and installation of pipe work, valves, blinds and other in-line items, including installation and removal of temporary spools in place of those items for activities such as testing and flushing.

Undertake testing, Pre-commissioning of mechanical, electrical and instrument systems;

Construct paved areas surrounding scraper traps;

Maintain and keep clean temporary and permanent roads and paving;

Provide all environmental control and mitigation measures to meet noise, air emission water and waste discharge, etc, requirements and principles described within the Contract;

Clean up Sites to satisfaction of Company. Dispose of building/construction waste as the Work proceeds in accordance with the requirements of the HSE section of the Contract;

Remove all temporary access and all other Temporary Works including fencing and gates and re-instate to original condition or better.

CONTRACTOR shall also manage, plan and coordinate all external interfaces related to the construction of the scraper traps and associated facilities.

Equipment, Machinery and Packages

The CONTRACTOR shall provide for the installation of equipment, machinery and packages, including in detail:

- Materials handling and all transportation to the site of installation - Setting down on prepared supports and foundations

- All levelling and necessary alignment

- Final hydrostatic testing, flushing and cleaning

- Internal and external cleaning, flushing, air drying of piping after hydrostatic testing

- Installation and removal of temporary equipment, supports and scaffolding for installation and testing purposes

- Supply and fixing of anchor bolts - Painting touch-up

- Protection against possible mechanical damage and against dust, humidity and rust.

Swamp area crossings

Pipe laying of sections of the line running through swamp areas, where the load bearing capacity of the ground is insufficient for the passage of works plant, shall be carried out according to the detailed design and Technical Specification for Pipeline Construction.

The CONTRACTOR shall carry out supplementary investigations, in addition to those effected during the design phase, in order to define the construction criteria, the plant to use and the detailed work programme.

In case, the Right-of-Way can first be improved by means of tree trucks or other low density material suitable for the purpose. In this case, the CONTRACTOR shall submit a detailed report to the COMPANY prior to commencing the work.

Two methods may be considered for the installation of pipelines in swamps:

 The flotation method, where the pipeline is laid from a barge moving through a channel cut along the right of way.

 The push-pull method, where the ditch is dug by a lightweight track-driven machine and the pipeline , fitted with buoyancy tanks if necessary, is pulled along the ditch and sunk. This method is preferred in environmentally sensitive areas.

Coating and Painting

CONTRACTOR shall provide coating and painting as follows:

i) Coating of field joint with heat shrinkable sleeves

ii) Repairs of line pipe coating at concrete coating yard and at site iii) Coating/repair the coating of fitting

iv) Painting of a/g piping and steel structures.

CONTRACTOR shall provide and maintain all material and equipment necessary for the sandblasting, coating and painting of piping, pipe supports and steel structures.

Concrete Coating

CONTRACTOR shall provide materials and carry out the concrete coating of line pipes for the swamp, mangrove swamp and watercourse crossings.

Hydrostatic Test

CONTRACTOR shall perform the hydrostatic test of the pipeline.