1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 651A Schedule 40 and 80 High Density Polyethylene (HDPE) Conduit STANDARD FOR SAFETYUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL
2、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Schedule 40 and 80 High Density Polyethylene (HDPE) Conduit, UL 651A Fifth Edition, Dated October 26, 2011 Summary of Topics This revision was issued to incorporate t
3、he following changes 1. Correction to explanatory or approximate impact weight value stated in parentheses. The new requirements are substantially in accordance with Proposal(s) on this subject dated January 27, 2017. Text that has been changed in any manner or impacted by ULs electronic publishing
4、system is marked with a vertical line in the margin. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form by any means, electronic, mechanical photocopying, recording, or otherwise without prior permission of UL. UL provides thi
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6、, lost savings, loss of data, or any other damages arising out of the use of or the inability to use this Standard, even if UL or an authorized UL representative has been advised of the possibility of such damage. In no event shall ULs liability for any damage ever exceed the price paid for this Sta
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8、ion introduced while purchaser is storing an electronic Standard on the purchasers computer system. MARCH 10, 2017 UL 651A tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL MARCH 10, 2017 UL 651A tr2 No Text on This PageUL COPYRIGHTED MATER
9、IAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL OCTOBER 26, 2011 (Title Page Reprinted: March 10, 2017) 1 UL 651A Schedule 40 and 80 High Density Polyethylene (HDPE) Conduit Prior to the rst edition, the requirements for the products covered by this standard we
10、re included in the Standard for Rigid Nonmetallic Conduit, UL 651. Prior to the fth edition, the requirements for continuous length HDPE conduit covered by this standard were included in the Standard for Continuous Length HDPE Conduit, UL 651B. First Edition May, 1981 Second Edition August, 1989 Thi
11、rd Edition August, 1995 Fourth Edition October, 2000 Fifth Edition October 26, 2011 This ANSI/UL Standard for Safety consists of the Fifth Edition including revisions through March 10, 2017. The most recent designation of ANSI/UL 651A as an American National Standard (ANSI) occurred on March 10, 201
12、7. ANSI approval for a standard does not include the Cover Page, Transmittal Pages and Title Page. The Department of Defense (DoD) has adopted UL 651A on November 30, 1984. The publication of revised pages or a new edition of this Standard will not invalidate the DoD adoption. Comments or proposals
13、for revisions on any part of the Standard may be submitted to UL at any time. Proposals should be submitted via a Proposal Request in ULs On-Line Collaborative Standards Development System (CSDS) at https:/. ULs Standards for Safety are copyrighted by UL. Neither a printed nor electronic copy of a S
14、tandard should be altered in any way. All of ULs Standards and all copyrights, ownerships, and rights regarding those Standards shall remain the sole and exclusive property of UL. COPYRIGHT 2017 UNDERWRITERS LABORATORIES INC. ANSI/UL 651A-2017UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPROD
15、UCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL OCTOBER 26, 2011 UL 651A 2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CONTENTS INTRODUCTION 1 Scope .4 2 General 4 2.1 Units of measurement .4 2.2 Undated references
16、.5 CONSTRUCTION 3 General 5 4 Straight Conduit 6 5 Dimensions 9 6 Straight Conduit and Fittings Other Than Elbows 10 7 Elbows Made from Straight Conduit 12 8 Schedule 40, 80, and EPEC-A and -B Coilable Conduit 13 PERFORMANCE 9 All Conduit Types 13 9.1 General .13 9.2 Deection under heat and load 14
17、9.3 Low-temperature handling test 19 9.4 Identication of conduit .20 9.5 Resistance to impact .20 9.6 Resistance to crushing .21 10 Straight Conduit .22 10.1 Tensile Strength .22 10.2 Dimensional stability and crushing strength of straight couplings 25 10.3 Bending test of joints 26 10.4 Axial-pull
18、test on joints .27 10.5 Water absorption 28 11 Schedule 40 and 80 and EPEC-A and -B Coilable Conduit .28 11.1 Tensile strength test .28 11.2 Moisture penetration test .29 11.3 Water absorption 29 MARKINGS 12 Details .29 OCTOBER 26, 2011 UL 651A 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REP
19、RODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL INTRODUCTION 1 Scope 1.1 These requirements cover straight conduit and coilable, smooth-wall, continuous length conduit with a circular cross section: a) Extruded straight rigid Schedule 40 high density PE (polyethylene) electrical conduit and the
20、 following ttings for use with this conduit type: 1) Elbows and 2) Rigid high density PE couplings. b) Schedule 40, Schedule 80, EPEC-A, and EPEC-B coilable, smooth-wall continuous length high density PE electrical conduit. 1.2 The conduit and ttings mentioned in 1.1 are intended for use at 50C (122
21、F) and lower ambient temperatures. Extruded straight rigid Schedule 40 conduit and ttings, where directly buried or encased in concrete in trenches outside of buildings, may be used with 90C (194F) wiring. 1.3 The conduit and ttings covered in these requirements are intended for use as rigid nonmeta
22、llic raceway for wires and cables in accordance with the National Electrical Code, NFPA 70. 1.4 Extruded straight rigid Schedule 40, Schedule 40, Schedule 80, EPEC-A, and EPEC-B coilable conduit is for aboveground use where encased in not less than 2 inches (50 mm) of concrete and for underground us
23、e by direct burial or encasement in concrete. 2 General 2.1 Units of measurement 2.1.1 Values stated without parentheses are the requirement. Values in parentheses are explanatory or approximate information. OCTOBER 26, 2011 UL 651A 4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR
24、 DISTRIBUTION WITHOUT PERMISSION FROM UL 2.2 Undated references 2.2.1 Any undated reference to a code or standard appearing in the requirements of this standard shall be interpreted as referring to the latest edition of that code or standard. CONSTRUCTION 3 General 3.1 All conduit and ttings shall b
25、e made and furnished with the degree of uniformity and quality of workmanship that are practicable in a well-equipped factory. The following materials shall be used as specied in the Standard Specication for Polyethylene Plastics Pipe and Fittings Materials, ASTM D 3350: a) For straight rigid condui
26、t and couplings and other ttings the material compound equal or exceed the cell classication PE 33662OC; b) For Schedule 40, Schedule 80, EPEC-A, and EPEC-B coilable conduit, the compound material shall equal or exceed the cell classication PE334420C or E. 3.2 Conduit shall be essentially circular i
27、n cross section. The inside surface of conduit shall be without indentations (normal convolutions are not to be considered as indentations), projections, roughness, or other features that could damage or impede wires and cables being pulled into the conduit. 3.3 Conduit and ttings shall provide a sm
28、ooth raceway for the pulling in of wires and cables. They shall not have any features that can abrade or otherwise damage wires and cables. The outside surfaces of conduit and ttings shall be smooth and without any chips, blister, cracks, or other defects. There shall not be any tendency for conduit
29、 or ttings to peel, scale, ake chalk, or crumble. 3.4 Both ends of each length of conduit shall be perpendicular to the longitudinal axis of the conduit. 3.5 Each length of conduit on which measurements are made is to be nished, smooth and clean wherever it is to touch any part of a measuring device
30、 or tool. While measurements are being made, the conduit and the air around it are to be in thermal equilibrium with one another at a temperature of 23.0 2.0C (73.4 3.6F). All of the average and individual outside diameter measurements are to be performed at the center and at least one end of the co
31、nduit. OCTOBER 26, 2011 UL 651A 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 4 Straight Conduit 4.1 The measurements from which the average outside diameters of a length of nished straight conduit are to be determined for comparison with
32、 the limits specied in inches in Table 4.1 or in millimeters in Table 4.2 are to be made by means of a: a) Machinists micrometer caliper that has a at-ended spindle, a at anvil and is calibrated to read directly to at least 0.001 inch or 0.01 mm; b) Vernier caliper calibrated to read directly to at
33、least 0.001 inch or 0.01 mm; c) Vernier wrap tape, calibrated to read directly to at least 0.001 inch or 0.01 mm; d) Tapered sleeve gauge accurate to 1 percent of its taper and 0.001 inch (0.01 mm) of its diameter; or e) Sleeve window gauge accurate to within 1 percent of its tape and 0.001 inch (0.
34、01 mm) of its diameter. Table 4.1 Outside diameter and wall thickness of conduit in inches Trade size Average Outside diameters Wall thicknesses Max Min Max Min 1/2 0.840 0.004 0.855 0.825 0.129 0.109 3/4 1.050 0.004 1.070 1.030 0.133 0.113 1 1.315 0.005 1.340 1.290 0.153 0.133 1-1/4 1.660 0.005 1.6
35、85 1.635 0.160 0.140 1-1/2 1.900 0.006 1.930 1.870 0.165 0.145 2 2.375 0.006 2.410 2.340 0.174 0.154 2-1/2 2.875 0.007 2.910 2.840 0.227 0.203 3 3.500 0.008 3.540 3.460 0.242 0.216 3-1/2 4.000 0.008 4.045 3.955 0.253 0.226 4 4.500 0.009 4.550 4.450 0.265 0.237 5 5.563 0.010 5.618 5.508 0.289 0.258 6
36、 6.625 0.011 6.690 6.560 0.314 0.280 DECEMBER 9, 2016 UL 651A 6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Table 4.2 Limits on outside diameters and wall thicknesses of conduit in millimeters Metric designator Average Outside diameters W
37、all thicknesses Maximum Minimum Maximum Minimum 16 21.34 0.10 21.72 20.96 3.28 2.77 21 26.67 0.10 27.18 26.16 3.38 2.87 27 33.40 0.13 34.04 32.77 3.89 3.38 35 42.16 0.13 42.80 41.53 4.06 3.56 41 48.26 0.15 49.02 47.50 4.20 4.68 53 60.32 0.15 61.21 59.44 4.42 3.91 63 73.02 0.18 73.91 72.14 5.57 5.16
38、78 88.90 0.20 89.92 87.88 6.15 5.49 91 101.60 0.20 102.74 100.46 6.43 5.74 103 114.30 0.23 115.57 113.03 6.73 6.02 129 141.30 0.25 142.70 139.90 7.34 6.55 155 168.28 0.28 169.93 166.62 7.98 7.11 4.2 In disputes that may arise between measuring techniques, the vernier wrap tape is to act as the refer
39、ee in determining compliance with the requirements for average outside diameters. 4.3 When employing a tapered sleeve gauge, the entrance and exit diameters of the gauge shall correspond to the maximum and minimum outside diameters for the trade size of conduit being measured. 4.4 When employing a s
40、leeve window gauge, the window shall extend beyond the two scribed marks which shall represent the minimum and maximum permitted diameters. 4.5 The measurements from which the minimum and maximum outside diameters (ovality or out-of-roundness) of a length of nished conduit are to be determined for c
41、omparison with the limits specied in inches in Table 4.1 or in millimeters in Table 4.2 are to be made by means of a: a) Machinists micrometer caliper that has a at-ended spindle, a at anvil, and is calibrated to read directly to at least 0.001 inch or 0.01 mm; b) Vernier caliper calibrated to read
42、directly to at least 0.001 inch or 0.01 mm; or c) Out-of-roundness gauge accurate to 0.001 inch or 0.01 mm. 4.6 In disputes that may arise between measuring techniques, the vernier caliper is to act as the referee in determining compliance with the requirements for minimum and maximum outside diamet
43、ers. 4.7 The measurements from which the wall thicknesses of a length of nished conduit are to be determined for comparison with the limits specied in inches in Table 4.1, or in millimeters in Table 4.2, are to be made by means of a machinists micrometer caliper that has a ratchet, a at-ended spindl
44、e, and a hemispherical anvil and is calibrated to read directly to at least 0.001 inches or 0.01 mm. OCTOBER 26, 2011 UL 651A 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 4.8 If desired, equivalent methods, tools, and measurement techniq
45、ues may be employed to determine compliance with the above dimensional requirements provided they are accurate to within 0.001 inch (0.01 mm). 4.9 To determine the average outside diameter when using a micrometer caliper or vernier caliper, at least four measurements (every 45 degrees) are necessary
46、 at each place to make certain that the largest and smallest diameters are found. The average of all the recorded diameters is to be determined and compared with the average diameter in inches in Table 4.1 or in millimeters in Table 4.2 for the trade size of conduit involved. The average of the reco
47、rded diameters shall not differ from the average diameter in the applicable table by more than the specied tolerances. 4.10 To determine the average outside diameter when using vernier wrap tape, place the vernier wrap tape around the conduit making sure that it is at right angles to the conduit axi
48、s and is at against the conduit surface. The observed reading is to be compared with the average diameter in inches in Table 4.1 or in millimeters in Table 4.2 for the trade size of conduit involved. The observed reading shall not differ from the average diameter in the applicable table by more than
49、 the specied tolerances. 4.11 To determine the average outside diameter when using a tapered sleeve gauge or sleeve window gauge, cut the end of the conduit square and remove burrs. Insert the conduit into the sleeve gauge and observe the position of the end with respect to the ends of the tapered sleeve gauge or the position of the end with respect to the minimum and maximum scribed marks of the sleeve window gauge. 4.12 When using a tapered sleeve gauge,
