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MINING

For more than 30 years, polyethylene (PE) pipe's unique characteristics have made it the product of choice fornumerous applications in the mining industry. It is a proven product in rugged terrains, extreme climates, andchanging site environments. Heat-fused joints create a monolithic structure that allows long lengths of pipe to bepulled from one area to another. PE pipe's flexibility, abrasion resistance and leak-free joints have helped the product

prove itself long-term in demanding environments.

Polyethylene pipe is the accepted standard for these mining applications:

Solution Mining Heap Leaching Process Water Process Slurry Water Transportation Tailings Transportation Dust Suppression Mine Dewatering Pit Dewatering

Depressurization

Specific PE pipe advantages in mining

When it comes to selecting pipe materials for mining applications, the two most important factors are security andreliability. The pipe must be rustproof, break-resistant and corrosion-free. It must safeguard the environment andprotect the taxpayer. It must have a track record that professional engineers and installers respect.

If you want your pipe to meet and exceed those challenges, it must be polyethylene (PE) pipe.

Proven advantages of PE pipe for mining applications include:

Chemical and Abrasion Resistance

Low Cost Ease of Installation Pressure Surge Resistant

Chemical and Abrasion Resistance

PE pipe has proven itself over and over again in the variety of mineral process, ranging from low ph acids tohigh ph caustic solutions.

PE pipe has superb chemical resistance and is the material of choice in harsh chemical environments. PE pipe is also abrasion resistant and is well suited for the solids environment in mining applications.

Pressure Surge Resistant

PE pipe for mining applications is semi-rigid to withstand high external loads as well as high internalpressure surges. Its flexible nature expands with pressure surges that increases the life of the pipeline andreduces maintenance costs.

Low Cost

Polyethylene pipe installations are cost effective and have long term cost advantages due to its physicalproperties, leak-free joints and reduced maintenance costs.

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The polyethylene pipe industry estimates the service life for PE pipe to conservatively be 50-100 years. Thisgenerates savings in replacement costs for generations to come.

In addition to the Life Cycle Capital Cost advantage of HDPE pipe, additional savings accrue to the ownerbecause the "allowable water leakage" is zero rather than typical the leakage rates of 10% to 20% for PVCand Ductile Iron.

Ease of Installation

The combination of flexibility and leak free joints allow for unique and cost effective types of installationmethods that the rigid PVC and Ductile Iron pipes can't use with bell and spigot connections. Thesealternate installation methods (Horizontal Directional Drilling, Pipe Bursting, Sliplining, Plow and Plant,Submerged or Floating Pipe, etc.) can save considerable time and money in most applications.

Polyethylene pipe is produced in straight lengths up to 50 feet long and coiled in diameters up through 6-inch. Coiled lengths over 1,000 feet are available depending on size providing low cost installations.

Polyethylene is about one-eighth the density of steel. It does not require the use of heavy lifting equipmentfor installation

POTABLE WATER APPLICATION

High Density Polyethylene (HDPE) Solid Wall Pipe has been used in Potable Water applications since the '60's, andhas been gaining approval and growth in municipalities ever since. HDPE Pipe is specified and/or approved inAWWA C901, AWWA C906, NSF 14, NSF 61 and ASTM D3035. Some distinctive advantages of HDPE pipe thatprovide important benefits for water applications are listed below:

Durability

1. Heat Fused Joints -- Benefitso HDPE pipe can be heat fused together to form a joint that is as strong or stronger than the pipe

itself and is leak free. This eliminates the potential leak points every 10-20 feet as found with PVC and Ductile

Iron bell and spigot connections.o The Life Cycle Cost of HDPE pipe differs from other pipe materials because the "allowable water

leakage" is zero rather than typical leakage rates of 10 to 20% for PVC and Ductile Iron.o HDPE pipe fused joints are self restraining and costly thrust restraints or thrust blocks are not

required.o HDPE pipe's fused joints simply do not leak, eliminating infiltration and exfiltration problems

experienced with alternate pipe joints.2. Flexible and Fatigue Resistant -- Benefits

o HDPE pipe can be bent to a radius 25 times the nominal pipe diameter (Example: 12" HDPE canbe cold formed in the field to a 25ft radius). This can eliminate many fittings required fordirectional changes in a piping system where fittings and thrust blocks or restraints are requiredwith alternate materials.

o The flexibility of HDPE pressure pipe makes it well suited for dynamic soils including areas prone toearthquake.

o HDPE pressure pipe can accept repetitive pressure surges that significantly exceed the staticpressure rating of the pipe.

3. Construction Advantages -- Benefitso

The combination of flexibility and leak free joints allow for unique and cost effective types ofinstallation methods that the rigid PVC and Ductile Iron pipes can't use with bell and spigotconnections. These alternate installation methods (Horizontal Directional Drilling, Pipe Bursting,Sliplining, Plow and Plant, Submerged or Floating Pipe, etc.) can save considerable time andmoney in most potable water applications.

o Polyethylene pipe is produced in straight lengths up to 50 foot long and coiled in diameters upthrough 6". Coiled lengths over 1000ft are available depending on size providing low costinstallations..

o Polyethylene is about one-eighth the density of steel, it does not require the use of heavy liftingequipment for installation.

4. Cost Effective, Long Term and Permanent -- Benefits

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o Polyethylene pipe installations are cost effective and have long term cost advantages due to itsphysical properties, leak free joints and reduced maintenance costs.

o The polyethylene pipe industry estimates a service life for HDPE pipe to conservatively be 50-100years. This relates to savings in replacement costs for generations to come.

5. Corrosion and Chemical Resistant -- Benefito HDPE pipe will not corrode, tuberculate or support biological growth.o HDPE pipe has superb chemical resistance and is the material of choice in harsh chemical

environmentso The advantages of corrosion and chemical resistance over traditional metal pipes are shared by

many plastic pipes, but HDPE pipe uniquely combines these attributes with the aforementionedadvantages of heat fused joints, flexibility and fatigue resistance.

6. Handling -- Benefitso It is much easier to handle and install HDPE pipe vs. the heavier, rigid metallic or concrete pipe

segments, allowing for huge cost advantages in the construction process.o Polyethylene pipe is better able to structurally withstand an impact than PVC pipe, especially in

cold weather installations when other pipes are more prone to cracks and breaks.7. Hazen Williams C Factor is 150 and doesn't change over time - Benefit

o HDPE pipe has a smooth ID that does not corrode or tuberculate and maintains its flow capabilityover time.

o The C Factor of Ductile Iron pipe is dramatically reduced over time due to corrosion and/ortuberculation.

According to the Federal Highway Administration, utilities spend $36 billion annually on corrosion protection of pipes.

Is your municipality contributing to these expenditures? If the answer is yes, then specify HDPE pipe. It does not

corrode or tuberculate, long-life cycle reduces your maintenance budget and increases your billable water..

M & I INDUSTRIAL

A pipe does more than just convey industrial liquids from one location to another. It must also be corrosion andabrasion resistant. It must be flexible and easy to install, and maintain a high flow coefficient throughout its service lifeof 50-100 years. And it must not leak.

With polyethylene pipe, you get all of these benefits. Because of the hazardous nature of some chemicals beingtransported, it is imperative that the system not leak. Heat fusing polyethylene pipe produces a leak free joint that isas strong if not stronger than the pipe itself in tension and pressure applications. These joints are self restrained.They need no thrust blocks or restraint harness except where the pipe attaches to a non-polyethylene system.

Polyethylene pipe is corrosion resistant and has a long history of use as an abrasion resistant material in miningapplications. It is lightweight, easy to install, and reduces the number of fittings needed in a system because of itsflexibility.

HDPE pipe is available for pressures up to 300 psi and constant service temperatures up to 140 F. Please see thechemical resistance chart inTR-19for the affects of different chemicals at different temperatures.

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Industries Currently Using HDPE Pipe

Fertilizer Paper and Pulp Manufacturing Power Plants Petrochemical Glass Semi-Conductor - Wafers Plastic resin Manufacturers Dredge operators

o Dredging Applications of High Density Polyethylene Pipeo Field Applications of Polyethylene Pipe in Dredgingo Polyolefin Materials in Industrial Pipe Applications

Clean and ultra-pure water process Tank farms - fire loops and mains LNG (Liquefied Natural Gas)

Applications

Acid/Caustic Lines SX Acid Mining Factory Mutual Piping - Fire loops and mains Organic Chemicals Inorganic Chemicals Hazardous Waste Wastewater Process Water Dual Contained Systems Cooling Water Acid bath Barge loading and unloading Tank storage

Dual Containment Piping Systems Aeration Tailings lines Liquor, bleaching, and caustic acid lines Pipe rehabilitation in both plant and out of plant piping. Dredge piping Pit dewatering Fertilizer Power Plants, fresh water and discharge. Spent fuel slurry

(fly ash and bottom ash)

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