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AWWA C205-24 Cement-Mortar Protective Lining and Coating for Steel Water Pipe 4 In. (100 mm) and Larger, Shop Applied, 2024
- Foreword [Go to Page]
- I. Introduction. [Go to Page]
- I.A. Background. Cement–mortar-lined-and-coated steel pipe was first used in the United States in the late 1800s. Some of the first pipelines were in service for almost a century by the time the first national standard was written. However, it was not unt [Go to Page]
- I.B. History. The first edition of this standard—designated 7A.7-41, Standard Specifications for Cement–Mortar Protective Coating for Steel Water Pipe of Sizes 30 Inches and Over—was approved by the AWWA Board of Directors on June 26, 1941. Before that, a
- II. Special Issues. The purchaser of cement–mortar linings or coatings is cautioned about the following concerns: [Go to Page]
- II.A. Soft, Aggressive Waters. Soft, aggressive waters, as well as prolonged contact with heavily chlorinated water, may be injurious to cement–mortar linings. When this environment is anticipated, further studies may be necessary to determine the suitabi [Go to Page]
- II.B. Intermittent Operations. Cement–mortar linings are best suited for pipelines that are continuously filled with water. When cement–mortar-lined pipelines are operated under prolonged empty conditions, special precautions may have to be taken to preve [Go to Page]
- II.C. Flow Velocity. Cement–mortar linings perform best when flow velocities are in normal ranges. When the flow velocity exceeds approximately 20 ft/s (6.1 m/s), special studies may be required to determine the suitability of this type of lining material
- II.D. Strain Limitations. Consideration should be given to limiting the maximum strains (or stresses) developed in the steel cylinder of cement–mortar-lined or cement–mortar-coated steel water pipe from internal pressure to ensure the long-term design lif
- II.F. Cement–Mortar-Lining Thickness. Properly applied cement mortar will inherently have some variations of thickness. The mortar-lining thickness may be slightly less than the minimum or slightly more than the maximum at localized areas provided the ave
- III. Use of This Standard. It is the responsibility of the user of an AWWA standard to determine that the products described in that standard are suitable for use in the particular application being considered. [Go to Page]
- III.A. Purchaser Options and Alternatives. When purchasing protective cement–mortar lining or coating for steel water pipe under the provisions of this standard, the following items (including specific details where applicable) should be specified by the [Go to Page]
- III.B. Modification to Standard. Any modification to the provisions, definitions, or terminology in this standard must be provided by the purchaser.
- IV. Major Revisions. The major revisions to this edition of the standard are summarized as follows:
- V. Comments. If you have any comments or questions about this standard, please call AWWA Engineering and Technical Services at 303.794.7711; write to the department at 6666 West Quincy Avenue, Denver, CO 80235-3098; or e-mail at standards@awwa.org.
- AWWA Standard
- SECTION 1: GENERAL
- Sec. 1.1 Scope
- Sec. 1.2 Purpose
- Sec. 1.3 Application
- SECTION 2: REFERENCES
- SECTION 4: REQUIREMENTS
- Sec. 4.1 General
- Sec. 4.2 Material
- Sec. 4.3 Surface Preparation
- Table 1 Cement–mortar-lining thickness
- Sec. 4.5 Cement–Mortar Coating
- Sec. 4.6 Cement–Mortar Overcoat
- SECTION 5: VERIFICATION
- Sec. 5.1 Sampling and Testing Cement Mortar for Linings
- Sec. 5.2 Testing Cement Mortar for Coatings
- Sec. 5.4 Inspection and Testing by Purchaser
- SECTION 6: DELIVERY
- Sec. 6.1 General
- Sec. 6.2 Plastic End Covers
- Sec. 6.3 Affidavit of Compliance [Go to Page]
