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HomeMy WebLinkAboutEngineer's Report-Design & Construction SpecificationsTo: LINN Energy 253 Callahan Ave. Parachute, CO 81635 Design & Construction Specifications July 13, 2014 Attention Tom Hoeglin - Construction Manager Project: Mesa Pipeline RE: Design & Construction Specifications Tom, Please find below information regarding pipeline design and construction specifications for the LINN Energy Mesa Pipeline for use in submittal to Garfield County for the Major Grading Permit. Construction Specifications A) General The pipeline right-of-way easement width is 75 feet wide. The buried portion of the pipeline will be installed with 60 inches of cover except on road crossings where the cover shall be 72 inches. Materials: 12" diameter steel pipe x 0.500 wt API 5L X-42 ERW Line Pipe, bare, DRL 12" diameter steel pipe x 0.312 wt API 5L X-42 ERW Line Pipe, w/14-16 mil FBE, DRL MAOP- 1,000 psig B) Welding Specification and X Ray Inspection Weld procedure, welding, welding qualification, destructive and non-destructive testing and weld inspection will comply with API 1104 requirements for the pipeline portion and ASME B31.8. Welders must have been tested within the past 6 months per API 1104 for the same pipe size and grade type and a copy turned in to LINN Energy before any welding is performed. Contractor shall visually inspect for and remove any construction debris, dirt, sand and other such undesirable materials from the inside of pipe, fittings, and valves before they are welded into the pipeline. End seals to be placed on welded pipe sections at the end of each day. Each welder shall identify his work in the manner prescribed by LINN Energy and shall number the welds to track with the x-ray examination. Mesa Pipeline Project LINN Energy Design & Construction Specifications 7-13-14 Should lamination, split ends or other defects in the pipe be discovered, the joint of pipe containing such defects shall be cropped, repaired, or removed from the line as directed by LINN Energy. LINN Energy may authorize the repairs of defects, except cracks, in the root, hot pass and filler beads. Any welds having a crack in the root, hot pass, or filler bead shall be removed. Any weld that shows evidence of repair work having been done without authorization by LINN Energy may be rejected. Repairs may be made to pin holes and undercuts in the final bead without LINN Energy authorization but the repaired weld must meet with the approval of LINN Energy. When radiographs are taken of repaired welds, they will bear the same number as the original weld plus the suffix letter "R". Radiographs of new welds, which replace a weld cut out, shall be identified with the original weld number plus the prefix letter "CO" to indicate the cut-out. All tie-in weld radiographs will indicate such by means of the prefixed letter "T". C) Pressure Test Procedures Contractor's pressure testing will comply with DOT CFR Part 192 requirements. Contractor shall be responsible for providing equipment and labor necessary to conduct and document the test, including but not limited to, providing, fabricating, installing and removing temporary manifolds, launchers and receivers; installing and removing pigs; all other work necessary in preparation for the test, testing and locating and repairing leaks. Pipelines will be tested for potential Dot Class I service at 110% of a minimum MAOP of 1,000 psig. The minimum test pressures will be 1100 psig. The maximum pressure in the test section will be 1580 psig. The minimum test period is for 8 hours. A calibrated test gauge will be installed next to the dead weight tester. The pressure and temperature chart documenting the test will be calibrated and tied to the dead weight tester. Certification of calibration of dead weight tester and recorder must be current within 6 months. D) Right of Way Work The construction right of way work width shall be 75 feet. Contractor will be responsible for maintaining all construction activities within the defined construction right of way. Contractor shall be responsible for dust control on the right of way. Contractor shall use only established roads or temporary roadways authorized by LINN Energy. Construction of the above grade pipeline is assumed to be assembly at the top and launch the pipe down and over the cliff section. Rockfall hazards will be evaluated during construction; the construction design team (Contractor, Engineer, Owner and Operators) will select rockfall protection measures based upon a hazard assessment by the team. Small brush shall be cut as short as possible in the right of way ditch, spoil bank and welding areas to minimize fire hazard and poor quality backfill material. Topsoil will be bladed off the right of way and kept separate from the other excavated material. 2 nuaw„p ROCK SOLID SOLUTIONS Mesa Pipeline Project LINN Energy Design & Construction Specifications 7-13-14 Brush and trees on the right of way shall be hydro -axed prior to grading. Trash will not be allowed on the right-of-way and must be removed daily. Rockfall hazards will be evaluated during construction; the construction design team (Contractor, Engineer, Owner and Operators) will select rockfall protection measures based upon a hazard assessment by the team. E) Material Handling Contractor shall unload and tally (or agree with tallies provided by delivering source) the pipe and materials being delivered to the storage and staging site as designated by LINN Energy, and shall accept the materials or notify LINN Energy of any damaged material. The contractor will be responsible for the materials in an undamaged condition once accepted. The pipe will be strung on wooden skids so as to prevent the pipe coating from coming in contact with the ground. Pipe skids and pipe handling equipment shall be padded to protect coating. Gaps shall be left in the stringing at appropriate locations to permit the regular use of the land by landowner. F) Ditching The ditch shall be cut to a uniform grade and to a depth which will provide a minimum cover of sixty (60) inches measured from the top of the pipe to the average elevation of the original ground on the two sides of the ditch unless consolidated rock is encountered. The finished ditch shall be excavated to a width not less than twelve (12) inches greater than the nominal outside diameter of the pipe to be placed therein. The finished ditch shall be free of clods, rocks, debris, protruding roots or any such materials or objects which may damage the pipe and/or pipe coating. Ditching, sloping and shoring are to comply with OSHA 1926 Subpart P requirements. Contractor is responsible for notifying local One Call services prior to any excavation. Contractor shall be responsible for locating and protecting all underground facilities and lines, and immediately notify the LINN Energy representative, owner, and officials having jurisdiction in event that such facility or line is damaged. Contractor shall repair or have repaired all contractor damage to an underground facility. Rock excavation shall be defined as the removal of rock in solid beds or masses in its original formation which cannot be removed by ripper or excavator and that requires removal only by pneumatic hammers, rock saw or blasting. Rock blasting will only be allowed with LINN Energy approval and LINN Energy representative present during the use of explosives. Contractor shall secure all necessary permits and conform to all legal requirements in connection with the use of explosives and insure that the explosives will be handled and used only by personnel qualified and certified to perform such work. The contractor shall erect warning signs at appropriate locations, which warn of the ongoing blasting in the area. The contractor shall use blasting mats as required to limit blast debris within the right of way. 3 ROCK SOLID SOLUTIONS Mesa Pipeline Project LINN Energy Design & Construction Specifications 7-13-14 G) Field Bending Contractor shall make all necessary field bends required to shape the pipe to conform to the ditch. No wrinkle bends or buckled pipe allowed, all bends will be made with cold pipe. Longitudinal weld seams to be located as near to neutral axis of pipe bend. Longitudinal weld seam is to be located on top of pipe for side bends. Stagger seams from joint to joint. No bending within 5' of pipe end. Pipe that does not fit the ditch shall not be installed. All bends used as over bends shall be made in such a manner so that the pipe, when installed at the middle of the ditch, shall clear the high point of the bottom of the ditch. As sag bends shall fit snug to the bottom of the ditch. H) Pipe coating Pipe surface must be power brushed or mechanically cleaned prior to coating. Grease and oil shall be removed with a totally volatile solvent that leaves no oily residue. Welds shall be cleaned of all welding slag, splatter, and scale. Sharp edges or burrs shall be removed by grinding or filing. Tapecoat 20 or shrink sleeves shall be used to coat all bare pipe and fittings delivered to the field, which will be buried. Pipe that is brought aboveground must have at least six (6) inches of coating above ground level. Just prior to lowering in pipe in ditch, pipe to be electronically jeeped with calibrated holiday detector set at a minimum of 1500 volts and any holiday repaired. Holidays will be repaired with epoxy sticks, or large areas will be primed and taped. Pipe surface must be power brushed or mechanically cleaned prior to coating repairs, taping or shrink sleeve applications. Cathodic test leads will be placed every mile or in a convenient fence line as close to the required mile interval as directed by LINN Energy and two test leads will be cad -welded to pipe at each location. I) Lowering -in In areas where the trench runs through rock, LINN Energy will determine if rock shield as well as padding will required. Rocks and debris shall be shall be removed from the bottom of the ditch prior to lowering in the pipe to avoid damage to the coasting. Sand bags will be installed on the bottom of the ditch to support the pipe a minimum of every 20' or as needed. Sackcrete bags are to be installed by contractor under pipe or fittings at any riser location. The pipe must contact the bottom of the ditch on all sag bends and stand off the bottom of all over bends. On side bends, the pipe must crowd the outside wall at the bottom of the trench. Pieces of pipe five (5) feet or more in length left over shall be carried ahead each day and installed at appropriate locations along the pipeline, not welded in a series. 4 MPW..Y.0 Mesa Pipeline Project LINN Energy Design & Construction Specifications 7-13-14 J) Backfilling Contractor shall utilize a mechanical padding machine or padding bucket to apply padding material around and approximately 12" on top of pipe. Loose dirt may then be placed in the ditch and the ditch wheel packed before placing preserved top soil. As a guideline, slope breakers/water bars are to be installed per the following spacing for slopes of 3-7% grade every 150'; 8-15% grade every 100'; 16-30% grade every 75'; 31-40% grade every 50'; >40% grade every 40' or as directed by Pipeline Inspector. K) Pipeline Cleaning The contractor shall provide, without interference to other pipeline construction operations, equipment and personnel necessary for fabricating, installing and removing manifolds, launchers, and traps; installing and removing pigs; locating and removing stuck pigs and alt other work connected with cleaning the pipeline. The completed pipeline is to be internally cleaned with pigs to assure that the pipeline is clear of all obstructions before the pipeline is tested and tied -in. M) Clean Up and Maintenance All roads, hillsides and anywhere contractor has moved earth to facilitate movement or operation of equipment shall be restored to original profile and condition. The contractor shall restore all culverts; borrow ditches, access roads, etc. to their original condition. Pipeline markers will be installed at all road, fence and pipeline crossings. Limitations: Rock Solid Solutions (RSS) has been requested to provide the design and construction specifications for the Mesa pipeline system. The pipeline alignment was designed by Construction Surveys Inc (CSI). The design has been directed by LINN Energy of which RSS was a part of the design team. Variability in the surface & subsurface conditions should be expected. Variability in the design topography compared to the actual topography represents the single most critical factor in the success of the pipeline alignment within the steep cliff areas. Design data was limited to the needs of LINN Energy and assessment based upon previous work and experience in the Piceance basin. Variability of the work must be anticipated, therefore, it is imperative that the construction management team consists of personnel familiar with these types of construction conditions and can be proactive in modifying the design to provide cost effective solutions to topographic, geotechnical and material issues that are unforeseen in the design phase. RSS does not warrant the assumptions provided in this memorandum, but does warn the owners of the project that variability will occur throughout the design, and construction of the project. The team selected to construct and manage the work is critical to the success of the project. RSS is confident that the Mesa Pipeline system to the top of Old Mountain can be constructed in accordance with the means and methods outlined above and developed by a competent conscientious 5 4 ROCK SOLI) SOLUTIONS Mesa Pipeline Project LfNN Energy Design & Construction Specifications 7-13-14 contractor (or team of contractors). The team can and will be able to construct the pipeline project such that the final pipeline system will meet or exceed the design requirements set forth in the project drawings and proposed specifications. Please call or email if you have any questions. 6 Respectfully, r Donald J. Berger, P,E. Sr. Engineer Rock Solid Solutions (970) 987-2743 ROCK SOLID SOLUTIONS alKiN•ew..