ANSI/AWWA C901-08, AWWA Standard for Polyethylene (PE) Pressure Pipe and Tubing, ½ In. (13 mm) through 3 In. (76 mm), for Water Service

(Revision of ANSI/AWWA C901-02)

Scope

This standard describes polyethylene (PE) pressure pipe and tubing made from material having standard PE code designations PE 2606, PE 2706, PE 2708, PE 3608, PE 3708, PE 3710, PE 4608, PE 4708, and PE 4710 and intended for use in water service. Polyethylene pipe ranges in nominal size from ½ in. (13 mm) through 3 in. (76 mm) and conforms to the outside diameter (OD) dimensions of iron pipe sizes (IPS) or to the inside diameter (ID) dimensions of IPS pipe. Polyethylene tubing ranges in size from ½ in. (13 mm) through 2 in. (51 mm) and conforms to the OD dimensions of copper tubing (CTS). Included in this standard are criteria for classifying PE plastic pipe materials, a system of nomenclature for PE plastic pipe, and requirements and test methods for materials, pipe, and tubing. Methods of marking are given.

Major revisions

This edition of ANSI/AWWA C901 is a comprehensive update and includes significant revisions and changes to all sections of the standard. Major changes made to the standard in this revision include the following:

1. Sec. 1.1 Scope. Removed material designations made obsolete by changes to ASTM D3350 and replaced with current and new material designations.

2. Section 2 References. Added seven ASTM standard references, reference to AWWA Manual M55, and reference to NSF/ANSI Standard 61. Deleted references to ISO 161 and NSF/ANSI Standard 14.

3. Section 3 Definitions. Deleted definitions for bloom, design factor, and working pressure; revised definitions for dimension ratio, hydrostatic design basis, hydrostatic design stress, pressure class, and surge pressure allowance.

4. Section 4 Requirements. (a) Sec. 4.1, clarified permeation statement. (b) Sec. 4.2, revised material requirements to be consistent with new material designations. Revised Table 1. Revised potable water certification to NSF/ANSI 61. (c) Sec. 4.3 Added toe-in; added special sizes; revised elevated temperature sustained pressure test; replaced Table 8 with new Table 2; Replaced Tables 2, 3, 4, 5, 6, 7, and 9 with new Tables 3, 4, 5, 6, and 7; added length tolerance; added elongation at break test; (d) deleted Sec. 4.4.

5. Section 5 Verification. (a) Sec. 5.1 and (b) 5.2 revised; deleted Sec. 5.2.2 (replaced with Sec. 4.3.9); (c) Sec. 5.3 added 5.3.1, 5.3.2, 5.3.4, 5.3.6, and 5.3.7; revised Sec. 5.3.3 and 5.3.5; (d) Sec. 5.4 revised; (e) Sec. 5.5 revised; (f) Sec. 5.6; revised Sec. 5.6.2, 5.6.3, 5.6.4, and 5.6.5.

6. Section 6 Markings and Delivery. (a) Sec. 6.1 revised 6.1.2, 6.1.3, and 6.1.4; added 6.1.5; (b) Sec. 6.2 revised 6.2.1; deleted Sec. 6.2.2; (c) Sec. 6.3 revised.

Earlier editions of ANSI/AWWA C901 included PE material designations PE 2406, PE 3406, and PE 3408. Changes to ASTM D3350 and PPI TR-3 led to changes in thermoplastic material designation codes, resulting in material designation PE 2406 being superseded by material designations PE 2606, PE 2706, and PE 2708; material designation PE 3406 being discontinued, and material designation PE 3408 being superseded by material designations PE 3608, PE 3708, PE 3710, PE 4608, PE 4708, and PE 4710, with the most common designations being PE 2708, PE 3608, and PE 4710. Accordingly, material designations and descriptions for the superseded PE 2406, PE 3406, and PE 3408 designations have been removed from ANSI/AWWA C901. For removed designations, refer to previous editions of ANSI/AWWA C901, ASTM D3350, PPI TR-3, and PPI TR-4. The removal of superseded material designations does not affect pipelines that are in service. Recognizing that a transitional period is necessary for the dissemination of information and to update specifications and industry information, product markings that include both older and newer material designations, for example PE 3408/PE 3608, may occur.

Metric conversions given in this standard are direct conversions of US customary units and are not those specified in International Organization for Standardization (ISO) standards.

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