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Application Comparison2019-05-04T04:03:20+00:00

Concentrate Pipelines

Concentrate pipelines are a critical asset to remote mine sites, as they are often the only means of sending ore to ports and other facilities where the concentrate can be shipped for processing.  Historically, when internal corrosion protection is desired HDPE liners are pulled through long sections of pipe. LPS’ welded joint system now permits polyurethane-lined pipe to be constructed with full penetration welded joints, thus offering the following advantages:

Polyurethane/Rubber Lining with Joint Lock Ring™  Welded JointsHDPE Pull-thru Liner with Flanged JointsBare Pipe with Welded Joints
Long-term Corrosion ProtectionYesYesNo corrosion protection. If corrosive liquids are present this is not a long-term option.
Mechanical JointsJoint Lock Ring system replaces need for mechanical jointsYes, flanges required every 500 – 1,000 metersn/a
Lining Adhesion to PipeExcellent adhesion to steelNot adhered to steel. Liner can collapse from vacuum, wear, age, etc.n/a
Pigging No risk of pigs stressing or disbonding polyurethane lining.Risk of pigs stressing liner or getting stuck. Not recommended to pig pipelines that have HDPE liners.Yes
Integrity ManagementIntelligent pigs can provide valuable information on pipe wall thickness and lining conditions.Without intelligent pigging, pipeline operators have limited information to assess pipe conditions.Intelligent pigs can assess extent of metal loss from wear and corrosion.
 Pipeline RepairsLimited to area of damaged pipeline section (12 to 48 meters) minimizing impacts to landowners and communities. Repairs are simpler and faster than the HDPE liner.More complicated and time-consuming as the repair involves removing and replacing a complete liner section ranging from 400 – 1,200 meters. Requires mobilization of both a pipeline repair crew and HDPE liner contractor with large laydown area.Limited to the area of the damaged pipeline section, minimizing impacts to landowners and communities.

Corrosive Water Pipelines

Epoxy or polyurethane lined pipe with welded joints is the most cost-effective long-term solution to internal corrosion. One option historically used to apply the epoxy to steel at the weld zone is a robot. Here’s how the Joint Lock Ring™ solution compares:

Epoxy/Polyurethane Lining with Joint Lock Ring™ Welded JointsEpoxy Lining Using Robot to Line Welded JointsBare Pipe & Joints
Consistent pinhole-free lining at weld joint interiorYes. The joint is internally sealed from corrosion as soon as the weld is complete.Difficult to consistently achieve pinhole-free linings at joints using thin-film epoxy over jagged internal weld surfaces.No protection from corrosion. Not a long-term solution.
Construction delays due to internal protection of the joint.Once the weld is complete, that’s it. Construction crews can maintain their pace down the line similar to bare pipeline construction.Robots often cause delays to construction crews while waiting for the joints to be internally lined.N/A. The joint nor rest of pipe is protected from internal corrosion.
30+ year lifespanJoint Lock Rings allow for the use of ~2 mm thick aromatic polyurethane linings that practically eliminate the possibility of a lining breach.The robot currently can only line joints with thin 0.5mm epoxy, which is difficult to consistently remain pinhole-free over jagged welds for decades.No. Water pipelines without protection from internal corrosion are generally not designed to last for more than 15 years.
Corrosion Allowance / Extra Pipe Wall ThicknessNo NoYes, additional cost for thicker pipe wall, and more welding, handling, freight

Abrasive Slurry High Pressure Pipelines

Tailings, sand, and run of mine are highly abrasive. Transporting these slurries long-distance by pipeline is now much more cost-effective with the use of Joint Lock Ring™ welded joints and premium abrasion resistant pipe linings such as polyurethane or rubber.

Polyurethane or Rubber Lining with Joint Lock Ring™ Welded JointsHigh-Density Polyethylene (HDPE) LinerBare PipePolyurethane or Rubber Lining with Flange Joints
CapEx Over 20 YrsFar lower CapEx than flanged joints. Far longer lifespan than HDPE or bare steel.Lower CapEx, but short lifespan in heavy abrasion will require liner or pipeline replacement.High CapEx construction costs. Short lifespan in heavy abrasion will require pipeline replacement.Far higher CapEx than Joint Lock Ring Welded Joints.
Abrasion ResistanceExcellentPoor/MediumPoor Excellent
 LifespanLonger Shorter ShorterLonger