| AWWA Comment Period on ANSI/AWWA C225 Standard for Fused Polyolefin Coatings for Steel Water Pipelines
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AWWA Comment Period on ANSI/AWWA C225 Standard for Fused Polyolefin Coatings for Steel Water Pipelines

The AWWA Standards Council is considering revisions to this standard for public comment. The publication of this information on the AWWA website begins the 30-day AWWA comment period for action on standards by the Standards Council. Purchase a review copy during the comment period for $20 each.

AWWA Comment Period is now closed. Review copies are no longer available.

Send comments to:
Liz Ralph
303.347.6177 phone
303.795.7603 fax

The review copy will be edited for publication and may also be revised as appropriate based on any comments received during the public comment period. Therefore, this copy is not suitable for continued utilization and is intended only for comment purposes.

Final publication of the standard may take several months. When it is available, a notice will be published in the official notice section of Journal – American Water Works Association. The standard becomes an effective AWWA standard on the first day of the month following such publication in Journal – American Water Works Association.

This standard describes the materials and application of fused polyolefin coating systems for buried service. This system is applied in pipe coating plants, both portable and fixed, using coating techniques and equipment as recommended by the manufacturer. Normally, these prefabricated, polyolefin coatings are applied as a three-layer system consisting of (1) a liquid adhesive or 100 percent solids adhesive layer, (2) a corrosion-protection inner layer, and (3) a mechanical-protection outer layer.

1.1.1 Maximum temperatures. This standard is intended for pipe in potable-water service. Therefore, the maximum service temperature of this coating considered in this standard is based on the maximum service temperature of potable water. These coating systems will perform at higher temperatures. Consult the coating manufacturer for conditions and limitations.
1.1.2 Conditions not described in this standard. This standard does not describe the additional materials and procedures that may be required for difficult conditions, such as those encountered in rocky areas or where soil conditions are known to be severe and in construction of underwater lines, casing pipe, and river crossings. The manufacturer should be consulted for specific recommendations when these conditions exist.

1. The title of the standard was changes to be consistent with other AWWA steel pipe coating standards.
2. Requirements were divided into prequalification requirements and quality control requirements. Related changes made to titles of Tables 2-5.
3. Removed maximum thickness requirements in Table 2, 3 and 5.
4. Removed minimum value for nonpolyolefinic material in Table 2.
5. Changed Dielectric Strength in Table 2, 3 and 4 to 450 V/mil (was 900 V/mil and it was incorrect).
6. Added Cathodic Disbondment to Table 4. The maximum radius is 12 mm when tested per ASTM G8.
7. Table 5 was created to list quality control properties for the coated pipe.
8. Adhesion testing of tape was moved from the prequalification tables to Table 5 for quality control requirements.
9. All existing wording in Section 4.5 Field Procedures was removed. The section now references AWWA C604.
10. Section 5 Verification was updated to match the new language being used in all coating standards.
11. Test method 5.5.3 was created to detail the peel adhesion test method of a coated pipe and add language to address rejection of pipe.
12. Frequency of adhesion testing was added to Sec. 5.5.3.
13. Section 5.5.4 was added to address adhesion testing of the outer layer tape.