Performance of Corrugated Pipe Manufactured with Recycled Polyethylene Content (2011) / Chapter Skim
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Appendix I - Proposed Draft Standard Specification for Corrugated Polyethylene Drainage Pipe Containing Recycled Polyethylene, 300- to 1,500-mm Diameter
Appendix I - Proposed Draft Standard Specification for Corrugated Polyethylene Drainage Pipe Containing Recycled Polyethylene, 300- to 1,500-mm Diameter
Pages 109-129
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I-1 A P P E N D I X I Proposed Draft Standard Specification for Corrugated Polyethylene Drainage Pipe Containing Recycled Polyethylene, 300- to 1,500-mm Diameter
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Successful perform ance of this product depends upon proper type of bedding and backfill, and care in installation. The structural design of corrugated polyethylene pipe and the proper installation procedures are given in AASHTO's LRFD Bridge Design Specifications, Section 12, and LFRD Bridge Construction Specifications, Section 30, respectively.
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D4703, Practice for Compression Molding Thermoplastic Materials into Test Specimens, Plaques, or Sheets D5630, Test Method for Ash Content in Plastics F412, Standard Term inology Relating to Plastic Piping System s F477, Standard Specification for Elastom eric Seals (Gaskets) for Joining Plastic Pipe F2136, Standard Test Method for Notched Constant Ligament-Stress (NCLS)
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4.1.2. Type S – This pipe shall have a full circular cross section, with an outer corrugated pipe wall and a smooth inner liner.
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Required properties for corrugated polyethylene pipe containing recycled polyethylene. Property Test Method Required Value Density ASTM D1505 ASTM D792 >0.947-0.955 a g/cm Melt Index ASTM D1238 190°C /2 .16 Kg <0.4 g/10 mi n % Carbon Black ASTM D4218 2-4 % % Ash ASTM D5603 <0.5 % % PP DSC Section 9.6 <5.0 % Yield Stress ASTM D638 b >3500 psi Break Strain ASTM D638 c >200% resin >150% pipe NCLS Stress Crack Test ASTM F2136 36 hrs resin 30 hrs pipe BFF Stress Crack Test Section 9.9 80°C/650 psi 200 hrs OIT ASTM D3895 50 mi n d a Correct for carbon black by D cor = D – 0.0044C, where C is % carbon black.
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6.3. Resin Blending – When blended resins are used, the com ponents of the blend mu st be virgin PE and the final blend mu st m eet all of the requirem ents of Section 6.1.1 for extruded pipe and blow mo lded fittings, Section 6.1.3 for rotational molded fittings and couplings, and Section 6.1.5 for injection molded fittings and couplings.
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Inside Diameter Tolerances -- The tolerance on the specified inside diameter shall be 4.5 percent oversize and 1.5 percent undersize, but not more than 37 mm oversize when measured in accordance with Section 9.15.1.
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7.3.1. Class 1 Perforations – The perforations shall be circular and shall have nominal diameters of at least 5 mm but not greater than 10 mm and shall be arranged in rows parallel to the axis of the pipe.
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7.6. % Carbon Black – The % carbon black, m easured on a piece of the pipe or a plaque ma de from the pipe will be between 2 and 4%, when tested according to ASTM D4218 and Section 9.4 of this standard.
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Inform ation regarding joint soiltightness criteria can be found in AASHTO's LRFD Bridge Construction Specification s , Section 26, "Metal Culverts."
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TEST METHODS 9.1. Test Conditions – Unless otherwise specified in the test methods or in this specification, conduct tests at the standard laboratory temperature of 23 2°C (73.4 3.6°F)
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DSC curve of HDPE containing PP expanded.
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This way, the tabs are under less stress than the reduced section so nearly all of the failures occur in the reduced section. A drawing of the fathead test specimen is shown in Figure 4.
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per minute) or 2% of the nominal inside diameter per minute.
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Inside Diameter – Measure the inside diam eter of the pipe with a tapered plug in accordance with ASTM D 2122. As an alternative, m easure the inside diam eter with a suitable device accurate to ±3.0 mm by taking two inside diam eter me asurem ents, the first at the seam and the second 90 degrees from the seam , and averaging the two m easure me nts.
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Examine Type D pipe for evidence of delamination as defined and described in Section 3.5 by cutting a section through the pipe as shown in Figure 6 and attempting to insert a feeler gauge between the internal supports and the inner and outer walls as shown in Figure 7. The feeler gauge should not pass between the internal support and the inner or outer wall at any point along the circumference of the pipe.
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I-17 Figure 7. Feeler gauge insertion.
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The ma nufacturer shall test each resin or resin blend lot for full cell class, NCLS and IT, unless a regular quality assurance program is in place to correlate cell class results to density and melt index. In any case, full cell class and NCLS testing should be perform ed on all approved/certified resin blends at least quarterly.
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The producing company must have a quality control plan approved by the specifying agency.
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X1.7.2. The specifying agency will review the manufacturer's written quality control plan and a plant inspection may be scheduled.
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X1.9.4. Unless requested at the time of ordering, test reports do not have to be filed for specific projects.
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