1、Standard Specification for Polyethylene (PE) Liner Pipe, 300- to 1600-mm Diameter, Based on Controlled Outside Diameter AASHTO Designation: M 326-18 Technical Section: 4b, Flexible and Metallic Pipe Release: Group 2 (June) American Association of State Highway and Transportation Officials 444 North
2、Capitol Street N.W., Suite 249 Washington, D.C. 20001TS-4b M 326-1 AASHTO Standard Specification for Polyethylene (PE) Liner Pipe, 300- to 1600-mm Diameter, Based on Controlled Outside Diameter AASHTO Designation: M 326-18 Technical Section: 4b, Flexible and Metallic Pipe Release: Group 2 (June) 1.
3、SCOPE 1.1. This specification covers the requirements and methods of tests for outside diameter dimension controlled polyethylene liner pipe (PE liner pipe), jointing, and fittings for use in pipe relining and culvert rehabilitation for industrial wastes, sanitary sewer, and surface and subsurface d
4、rainage applications. 1.1.1. Nominal sizes of 300 to 1600 mm are included. 1.1.2. Materials, workmanship, dimensions, pipe stiffness, joining systems, and form of markings are specified. 1.2. This specification is intended for rehabilitation of industrial waste, sanitary sewer, and surface and subsu
5、rface drainage applications by the insertion of PE liner pipe through existing pipe. PE liner pipe is designed to minimize traffic disruption and subsurface damage, and rehabilitate existing sewers and culverts with little or no interruption in service or traffic. Note 1When polyethylene pipe is to
6、be used in locations where the ends may be exposed, consideration should be given to protection of the exposed portions due to combustibility of the polyethylene and the effects of prolonged exposure to ultraviolet radiation. 1.3. For the PE liner pipe to perform properly, the annular space between
7、existing and PE liner pipe must be filled. This specification does not include methods to fill the annular space between the existing pipe and the PE liner pipe, insertion techniques, and termination techniques. Construction and installation procedures are described in ASTM F585. 1.4. This standard
8、does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. 2. REFERENCED DOCUMENTS 2.1. AST
9、M Standards: D618, Standard Practice for Conditioning Plastics for Testing D883, Standard Terminology Relating to Plastics 2018 by the American Association of State Highway and Transportation Officials. All rights reserved. Duplication is a violation of applicable law.TS-4b M 326-2 AASHTO D2122, Sta
10、ndard Test Method for Determining Dimensions of Thermoplastic Pipe and Fittings D2412, Standard Test Method for Determination of External Loading Characteristics of Plastic Pipe by Parallel-Plate Loading D3212, Standard Specification for Joints for Drain and Sewer Plastic Pipes Using Flexible Elasto
11、meric Seals D3350, Standard Specification for Polyethylene Plastics Pipe and Fittings Materials F412, Standard Terminology Relating to Plastic Piping Systems F477, Standard Specification for Elastomeric Seals (Gaskets) for Joining Plastic Pipe F585, Standard Guide for Insertion of Flexible Polyethyl
12、ene Pipe Into Existing Sewers F714, Standard Specification for Polyethylene (PE) Plastic Pipe (DR-PR) Based on Outside Diameter F1473, Standard Test Method for Notch Tensile Test to Measure the Resistance to Slow Crack Growth of Polyethylene Pipes and Resins F2620, Standard Practice for Heat Fusion
13、Joining of Polyethylene Pipe and Fittings 3. TERMINOLOGY 3.1. The terminology used in this standard is in accordance with the definitions given in ASTM D883 and ASTM F412 unless otherwise specified. 3.2. crackany break or split that extends through the wall. 3.3. creasea visible irrecoverable indent
14、ation. 3.4. bucklingduring pipe flattening testing, any decrease or downward deviation in the pipe load-deflection test curve shall be considered a buckling point. 3.5. delamination the occurrence of any separation in the pipe wall visible to the eye. 3.6. polyethylene (PE) plasticsplastics based on
15、 polymers made with ethylene as essentially the sole monomer (ASTM D883). 3.7. reworked plastica plastic from a processors own production that has been reground, pelletized, or solvated after having been previously processed by molding, extrusion, etc. (ASTM D883). 3.8. virgin polyethylene materialP
16、E plastic material in the form of pellets, granules, powder, floc, or liquid that has not been subject to use or processing other than required for initial manufacture. 4. CLASSIFICATION 4.1. The PE liner pipe covered by this specification is classified by the Standard Dimension Ratio (SDR) system.
17、The relationship between SDR, outside diameter, and minimum wall thickness is as follows: oDSDRt (1) where: SDR = Standard Dimension Ratio; Do= Average Outside Diameter, mm; and t = minimum wall thickness, mm. 2018 by the American Association of State Highway and Transportation Officials. All rights
18、 reserved. Duplication is a violation of applicable law.TS-4b M 326-3 AASHTO 4.2. Standard Dimension Ratios covered by this specification are SDR 41, SDR 32.5, and SDR 26. 4.3. Where existing conditions or special requirements make other SDR classifications necessary, other sizes or dimension ratios
19、 or both shall be acceptable for engineering applications when mutually agreed on by the customer and the manufacturer. This is provided that the pipe is manufactured from plastic compounds meeting the material requirement of this specification. 5. ORDERING INFORMATION 5.1. Orders using this specifi
20、cation shall include the following information as necessary to adequately describe the desired product: 5.2. AASHTO designation and year of issue; 5.2.1. Type of pipe (Section 4.2); 5.2.2. Diameter and length required, either total length or length of each piece and number of pieces; 5.2.3. Certific
21、ation, if desired (Section 12.1). 6. MATERIALS 6.1. Basic Materials: 6.1.1. Extruded Pipe and FittingsPipe and fittings shall be made of virgin PE conforming with the requirements of cell class 345464C as defined and described in ASTM D3350. Resins that have higher cell classifications in one or mor
22、e properties are acceptable provided that product requirements are met. 6.1.2. Rotational Molded Fittings and CouplingsFittings and couplings shall be made of virgin PE resins that conform with the requirements of cell classification 213320C as defined and described in ASTM D3350, except that the ca
23、rbon black content shall not exceed 3 percent. Resins that have higher cell classifications in one or more properties are acceptable provided that product requirements are met. 6.2. Reworked PlasticIn lieu of virgin PE, clean reworked plastic may be used by the manufacturer, provided that it meets t
24、he cell class requirements as described in Section 6.1. 6.3. The manufacturer shall not blend resins to meet the cell classification specified in Section 6.1.1 or 6.1.2. Blending of reworked plastic and virgin plastic is allowed provided that both the reworked resin and the virgin resin meet the req
25、uirements of Section 6.1. 7. REQUIREMENTS 7.1. WorkmanshipThe pipe and fittings shall be free of foreign inclusions and visible defects as defined herein. The ends of the pipe shall be cut squarely and cleanly so as not to adversely affect joining or connecting. Field cuts shall be de-burred and fre
26、e of defects. 7.2. Visible DefectsCracks, creases, delaminations, and unpigmented or nonuniformly pigmented pipe are not permissible in the pipe or fittings as furnished. There shall be no evidence of cracking or delamination when tested in accordance with Section 9.2. 2018 by the American Associati
27、on of State Highway and Transportation Officials. All rights reserved. Duplication is a violation of applicable law.TS-4b M 326-4 AASHTO 7.3. Pipe Dimensions: 7.3.1. Nominal SizeThe nominal size for the pipe and fittings is based on the nominal outside diameter of the pipe. Nominal diameters, outsid
28、e diameters, and tolerance shall be in accordance with Table 1, when measured in accordance with Section 9.5.1. Table 1Outside Diameter and Tolerance Nominal Pipe Size, mm (in.) Outside Diameter, mm (in.) Tolerance, mm ( in.) 300 (12) 323.8 (12.750) 1.5 (0.057) 325 (13) 339.7 (13.375) 1.5 (0.060) 35
29、0 (14) 355.6 (14.000) 1.6 (0.063) 400 (16) 406.4 (16.000) 1.8 (0.072) 450 (18) 457.2 (18.000) 2.1 (0.081) 500 (20) 508.0 (20.000) 2.3 (0.090) 538 (21.5) 546.1 (21.500) 2.5 (0.097) 550 (22) 558.8 (22.000) 2.5 (0.099) 600 (24) 609.6 (24.000) 2.7 (0.108) 650 (26) 660.4 (26.000) 3.0 (0.117) 700 (28) 711
30、.2 (28.000) 3.2 (0.126) 750 (30) 762.0 (30.000) 3.4 (0.135) 800 (32) 812.5 (32.000) 3.7 (0.144) 850 (34) 863.6 (34.000) 3.9 (0.153) 900 (36) 914.4 (36.000) 4.1 (0.162) 1050 (42) 1066.8 (42.000) 4.8 (0.189) 1200 (48) 1219.2 (48.000) 5.5 (0.216) 1350 (54) 1371.6 (54.000) 6.2 (0.243) 1600 (63) 1600.2 (
31、63.000) 7.20 (0.284) 7.3.2. Wall ThicknessThe wall thickness shall have the minimum thicknesses in Table 2 for each standard dimension ratio, when measured in accordance with Section 9.5.3. 2018 by the American Association of State Highway and Transportation Officials. All rights reserved. Duplicati
32、on is a violation of applicable law.TS-4b M 326-5 AASHTO Table 2Minimum Wall Thickness Nominal Pipe Size, mm (in.) Outside Diameter, mm (in.) SDR 41 Wall Thickness, mm (in.) SDR 32.5 Wall Thickness, mm (in.) SDR 26 Wall Thickness, mm (in.) 300 (12) 323.8 (12.750) 7.9 (0.310) 10 (0.392) 12.4 (0.490)
33、325 (13) 339.7 (13.375) 8.2 (0.326) 10.4 (0.412) 13.1 (0.514) 350 (14) 355.6 (14.000) 8.6 (0.341) 10.9 (0.431) 13.6 (0.538) 400 (16) 406.4 (16.000) 9.9 (0.390) 12.5 (0.492) 15.6 (0.615) 450 (18) 457.2 (18.000) 11.2 (0.439) 14.1 (0.554) 17.6 (0.692) 500 (20) 508.0 (20.000) 12.4 (0.488) 15.6 (0.615) 1
34、9.5 (0.769) 538 (21.5) 546.1 (21.500) 13.3 (0.524) 16.8 (0.662) 21.0 (0.827) 550 (22) 558.8 (22.000) 13.6 (0.537) 17.2 (0.677) 23.4 (0.846) 600 (24) 609.6 (24.000) 14.9 (0.585) 18.7 (0.738) 23.4 (0.923) 650 (26) 660.4 (26.000) 16.1 (0.634) 20.3 (0.800) 25.4 (1.000) 700 (28) 711.2 (28.000) 17.4 (0.68
35、3) 21.9 (0.862) 27.4 (1.077) 750 (30) 762.0 (30.000) 18.6 (0.732) 23.4 (0.923) 29.3 (1.154) 800 (32) 812.5 (32.000) 19.8 (0.780) 25.0 (0.985) 31.3 (1.231) 850 (34) 863.6 (34.000) 21.1 (0.829) 26.6 (1.046) 33.2 (1.308) 900 (36) 914.4 (36.000) 22.3 (0.878) 28.1 (1.108) 35.2 (1.385) 1050 (42) 1066.8 (4
36、2.000) 26.0 (1.024) 32.8 (1.292) 41.0 (1.615) 1200 (48) 1219.2 (48.000) 29.7 (1.171) 37.5 (1.477) 46.9 (1.846) 1350 (54) 1371.6 (54.000) 33.4 (1.317) 42.2 (1.662) 52.8 (2.077) 1600 (63) 1600.2 (63.000) Not Available 49.2 (1.938) 61.5 (2.423) 7.3.3. Average Inside DiameterThe average inside diameter
37、(ID) shall be calculated as follows: ( )2 1.062min maxminOD ODAvgID t+= (2) where: AvgID = Average inside diameter, mm (in.); ODmin= Minimum outside diameter from Table 1, mm (in.); ODmax= Maximum outside diameter from Table 1, mm (in.); and tmin= Minimum wall thickness from Table 2, mm (in.). 7.3.4
38、. LengthPE liner pipe may be sold in any length agreeable to the user. The furnished length shall not be less than the shorter of 99 percent of the agreed length or 12 mm (1/2in.), whichever is less. 7.4. Pipe StiffnessThe pipe shall have a minimum pipe stiffness at 5 percent deflection as follows w
39、hen tested in accordance with Section 9.1. The minimum pipe stiffness shall be as follows: 41 SDR 55.2 kPa (8 psi) 32.5 SDR 110.3 kPa (16 psi) 26 SDR 213.7 kPa (31 psi) 2018 by the American Association of State Highway and Transportation Officials. All rights reserved. Duplication is a violation of
40、applicable law.TS-4b M 326-6 AASHTO 7.4.1. Pipe stiffness test for 600 mm (24 in.) and smaller diameters may be extrapolated to larger sizes of the same SDR classification, provided the manufacturer can document the following equation accurately predicts the pipe stiffness for all sizes and SDR: ( )
41、31CEPSSDR=(3) where: C = Design constant; = 0.649 in SI units; = 4.472 in U.S. Customary units; E = Flexural Modulus, kPa (psi); and SDR = Standard Dimension Ratio (as defined in Section 4). 7.5. Pipe FlatteningThere shall be no evidence of buckling (decrease or downward deviation in the load deflec
42、tion curve), cracking, or splitting when the pipe is tested in accordance with Section 9.2. 7.6. Fitting Requirements: 7.6.1. The fittings shall not reduce or impair the overall integrity or function of the PE liner pipe. 7.6.2. Common fittings include in-line joint fittings, reducers, and branch or
43、 complementary assembly fittings such as tees and wyes. These fittings shall be installed or coupled to the pipe by various methods in accordance with Section 7.7. 7.6.3. All fittings shall be within an overall length dimensional tolerance 12 mm (1/2in.) of the manufacturers specified dimensions whe
44、n measured in accordance with Section 9.5.2. 7.6.4. Fittings shall not reduce the inside diameter of the pipe being joined by more than 12 mm (1/2in.). Reducer fittings shall not reduce the cross-sectional area of the small size. 7.6.5. Fabricated fittings should be supplied with joints compatible w
45、ith the overall system. 7.7. Jointing Requirements: 7.7.1. Joints shall provide sufficient longitudinal (or axial) strength to preserve pipe alignment, prevent separation at the joints, and maintain integrity while pushing or pulling pipe lengths into existing pipes or culverts. Joints shall be mech
46、anical or male and female joint connections. Mechanical or male and female joint connections shall be an integral part of the PE liner pipe. Alternatively, the mechanical joint, male and female joints, or pipe ends may be heat fused provided that the fusion process meets the requirements of ASTM F26
47、20 and that the fused connection meets the requirements of Section 7 of this standard. 7.7.2. Joints shall have sufficient longitudinal or axial compression strength to withstand a maximum compressive force of 17.5 N/mm (100 lbf/in.) of outside diameter circumference in compression while maintaining
48、 joint integrity when tested in accordance with Section 9.4.1. 7.7.3. Joints shall have sufficient pull-apart strength to withstand a maximum tensile force of 17.5 N/mm (100 lbf/in.) of outside diameter circumference in tension without joint disassembly when tested in accordance with Section 9.4.2.
49、7.7.4. Joints shall not reduce the inside diameter or enlarge the outside diameter of the pipe being joined by more than 6 mm (1/4in.). When the pipe is coupled, the axis of the assembly will be level and true when tested in accordance with Section 9.4.3. 2018 by the American Association of State Highway and Transportation Officials. All rights reserved. Duplication is a violation of applicable law.TS-4b M 326-7 AASHTO 7.7.5. Other types of mechanical jointing, which are equally effective as those described and which co
