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“SIPHON STRING”

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					                  POLYETHYLENE
                    SPECIALTY PRODUCTS
                          HMW-HDPE


                “SIPHON STRING”
                        ENGINEERED FOR
                     DOWN HOLE APPLICATIONS

PLASTIC MANUFACTURES “SINCE 1953”
POLYTUBES                                  Gas Gathering Piping Products



               POLYTUBES HIGH MOLECULAR WEIGHT (HMW)
                          High Density Polyethylene Pipe for

                              Siphon String

        General Information
   POLYTUBES extrudes its polyethylene pipe from a High Molecular Weight (HMW)
   High Density Polyethylene (H.D.P.E.) hexene copolymer resin manufactured, using a
   Novapol resin. This material provides an excellent combination of toughness, durability
   and environmental stress crack resistance for pressure and non pressure pipe
   applications. POLYTUBES polyethylene piping systems offers some unique
   characteristics and allow the design engineer to take advantage of these attributes such
   as low cost installation, excellent rough handling capability, cold temperature brittleness
   resistance, excellent weather chemical resistance, will not corrode and long service life
   with minimal maintenance requirements


   This material is listed by the Canadian Standards Association (CSA) and Plastic Pipe
   Institute (PPI) as a PE-3408 resin with a hydrostatic design basis (HDB) of 1600 psi for
   water at 23oC. It complies with ASTM D-1248 as a Type III Class C, Category 5, Grade
   P34 material and with ASTM D-3350 as a 345464C cell class material.

   Identification of POLYTUBES polyethylene pipe by cell classification is as follows:


   PROPERTY                         NOMINAL VALUE                            CELL CLASS

   Density                                  0.955 gm/cm3                           3
   Melt Index                               <0.10 dg/min                           4
   Flexural Modulus                         135,000 psi                            5
   Tensile Strength, yield                  3,300 psi                              4
   Slow Crack Growth (Pent Test)            100 hrs                                6
   Hydrostatic Design Basis                 1600 psi                               4
   Colour/UV Stabilizer                     Carbon Black                           C
    POLYTUBES                                 Gas Gathering Piping Products




     “Siphon”            String
Commonly referred to as a velocity string
for continual fluid lifting from gas wells.
POLYTUBES extrudes this pipe product
from a specific High Molecular Weight
(HMW) High Density Polyethylene
(H.D.P.E.) hexene copolymer resin.

The design and material content have
been engineered for installations with
well bore pressures of 2100 psi and
landing depths up to 850 meter (2700 ft).

The Outside Diameter pipe size
increments designed to be utilized with
conventional tubing service units and
hang off equipment.
                                                            Efficiency Advantages
                                                            •    A controlled smooth seamless bore,
                                                                 with a roughness factor 30 times
                                                                 better than steel

                                                            •    A non-corrosive material that will not
                                                                 corrode or restrict flow over time.

                                                            •    Any solids produced in the well will
                                                                 not adhere as readily to this material.
                                                                 (Solids that do adhere to the pipe
                                                                 I.D.are easily dislodged with well
                                                                 treatment additives).

                                                             •     Excellent resistance to well
                                                                   treatment chemicals.

                                                             •     Excellent abrasion resistance,
                                                                    specifically sand.

                                                             •     Ask us about our polymer
                                                                    technology to achieve depths up to
                                                                    1600 meters (5200 ft).
  POLYTUBES                                      Gas Gathering Piping Products




Pipe Properties
                                          Units           Typical Values    ASTM Test Method
Pipe Ring Tensile Strength @ Yield           MPa                   23           D2290
Pipe Density                                 g/cm3             0.955            D1505
Carbon Black Content                         %                    2.1           D1603
                                             o
Thermal Stability                              C                 260            D3350
Long Term Hydrostatic Strength @ 23oC        psi                1600            D2837
Long Term Hydrostatic Strength @ 60oC        psi                1000            D2837
Elevated Temperature Sustained Pressure
Tests @ 80oC
         725 psi    hours                                       1000            n/a
         480 psi    hours                                       3600            n/a
Coefficient, of Linear Thermal
 Expansion                                  in./in./oF         1.2x10-4         D696
Thermal Conductivity                      BTU/hr/ft2/°F/in       2.7            C177
Roughness Coefficient                         ft               5.0x10-6          n/a
Cell Classification                        PE 345464C                           D3350

Resin Properties
Flow Rate                                  dg/min                8.5              D1238
Density                                     g/cm3                0.947            D1505
Tensile Strength at Yield                  MPa                   22.8             D638
Elongation (@Break)                         %                    850              D638
Izod Impact Resistance @ 23oC              ft.-lb./inch          7                D256
Flexural Modulus (@2% Strain)              psi                  125,000           D790
Environmental Stress Crack Resistance      hours                >10,000           D1693
Coefficient, of Linear Thermal
 Expansion                                 in./in./oF            0.8x10-4         D696




        POLYTUBES PIPE DIMENSIONS 1600 P.S.I. HDB

        POLYTUBES offers a comprehensive range of H.D.P.E. pipes based on outside
        diameters. The design pressure for POLYTUBES pipe is determined in accordance to
        the Standard ISO equation shown below:
POLYTUBES                                  Gas Gathering Piping Products




   Calculation:
                                      2S
                                P=         x   F
                                     R−1
                     Where:
                     P design pressure, psi
                     S hydrostatic design basis (HDB) at 23°C,=1600 psi
                        (HDB=11.03 Mpa for PE-3408)
                     F service fluid factor (0.5 is recommended for water)
                     R ratio of pipe outside diameter to pipe minimum wall thickness.

        Note: The Environmental or temperature factor is an additional de-rating factor to
        compensate for temperatures higher than 23°C. (Consult your POLYTUBES
        representative for higher temperature de-rating factor)

   The recommended continuous working pressures for POLYTUBES "SIPHON
   STRING" are identified by the SDR in the attached table.

                                              Outside Pipe Diameter
          (* Standard Dimension Ratio =                                  )
                                           Minimum Pipe Wall Thickness


   With the material criteria conforming to the requirements of the following Standards:


                         *     CAN/CSA 137.1

                         *     CGSB-41-GP-25M

                         *     ASTM F-714


                         *     ASTM D-3035


                         *     AWWA C901/C906

                         *     API 15LE
                             POLYTUBES PE-3408 HIGH MOLECULAR WEIGHT HIGH
ISO 9001-2000                DENSITY POLYETHYLENE (HDPE) SIPHON STRING TUBING
Certified

      Average        Nominal            Average          Standard           Average        Average   Internal     23°C       Burst     Critical
      Outside          Wall             Internal         Dimension           Pipe           Pipe       Pipe     Continuos   Pressure   Buckling
      Diameter       Thickness          Diameter           Ratio            Weight         Weight      Area     Operating              Pressure
                                                                                                                Pressure
         (in)            (in)               (in)            (SDR)             (lb/ft)      (lb/m)     (in2)       (psi)      (psi)      (psi)
         1.25            0.375             0.500              3.33             0.441        1.446     0.196        687        2743       2100
         1.25            0.325             0.600              3.85             0.405        1.331     0.283        560        2240       1350
         1.25            0.275             0.700              4.55             0.363        1.191     0.385        451        1800        800

         1.50            0.350             0.800              4.29             0.545        1.787     0.502        486        1940       950
         1.50            0.300             0.900              5.00             0.489        1.604     0.636        400        1600       600

         1.75            0.375             1.000              4.67             0.699        2.293     0.786        436        1740       750
         1.75            0.325             1.100              5.38             0.630        2.068     0.949        365        1460       500
         1.75            0.300             1.150              5.83             0.593        1.944     1.308        330        1325       390

         2.00            0.375              1.25              5.33             0.829        2.720     1.227        270        1475       500

        2.375            0.513             1.350              4.63             1.294        4.247     1.429        440        1761       780
        2.375            0.488             1.400              4.87             1.249        4.098     1.538        410        1653       670
        2.375            0.463             1.450              5.14             1.202        3.943     1.652        385        1548       580
        2.375            0.438             1.500              5.43             1.153        3.782     1.767        360        1445       480

        2.875            0.663             1.550              4.34             1.985        6.511     1.886        475        1916       950

            “Continuos Operating Pressure” based on 50 year life at a 2:1 safety factor.
            “Burst Pressure” based on 2 minute burst pressure with no safety factor.
             “Critical Buckling” based on 50 year and 0% ovality.
POLYTUBES                                  Gas Gathering Piping Products




              Normal Packaging Configurations
     POLYTUBES pipe is available in the following packaging configuration:


     Reel dimension will be limited to a maximum pipe weight of 1800 kgs (4000 lbs)




 REELS                                                     For actual REEL dimensions

 Available:
    25.4 mm (1”)
       to
    31.8 mm (1 1/4”)      2500 meter (8200 ft)

    38.1 mm (1 1/2”)
       to
    44.5 mm (1 3/4”)      1500 meter (4900 ft)

    50.8 mm (2”)          1000 meter (3200 ft)


     quantity per truckload, please discuss with
     your POLYTUBES representative.


     OTHER PRODUCTS
     MANUFACTURED BY POLYTUBES

     •   Polyethylene pipe for natural gas services
     •   Polyethylene pipe for gas gathering applications
     •   Wide range of diameters of pipe in Low and Medium Density Polyethylene for
         various applications
     •   Custom extrusion available upon request.
     •   Conduit

                   PLASTIC MANUFACTURES - “SINCE 1953”

Courtesy of Polytubes
September 1997

				
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