ASTM C828-23 PDF

Overview

ASTM C828-23 provides a standard test method for assessing the integrity of vitrified clay pipe lines, typically used in gravity-flow sewer systems, by employing a low-pressure air test. This procedure verifies the tightness and soundness of installed pipelines by measuring air loss under controlled conditions. It is recognized and approved for use by major authorities, including agencies of the U.S. Department of Defense, to ensure reliable sewer infrastructure installation.

Low-pressure air testing is favored due to its efficiency and non-destructive approach, making it suitable for both newly installed and existing pipes before and after trench backfilling. This method helps identify leaks or weaknesses that could compromise the long-term function of clay sewer lines.

Key Topics

• Test Procedures: The method involves securely plugging the pipe section, introducing air at low pressure, and monitoring the rate of pressure drop over time. The line is deemed satisfactory if the pressure does not drop by more than 1 psi within the specified test duration, which varies by pipe size.
• Preparation and Safety: All connection laterals must be properly plugged and braced. The interior should be wet for consistent results, and personnel safety measures are stressed due to the hazards of over-pressurization or improper plug installation.
• Test Timing: Minimum holding times for various pipe diameters are provided to standardize results and reliably detect significant leaks.
• Allowable Air Loss: Maximum permissible air loss rates are defined for different pipe sizes, ensuring that even minor leaks can be identified.

Applications

Low-pressure air testing according to ASTM C828-23 is widely used by:

• Municipalities and Utilities: To confirm the integrity of newly installed or rehabilitated vitrified clay gravity sewer pipes before acceptance.
• Contractors: For quality assurance during pipeline installation and for performing preliminary tests prior to backfilling, minimizing risk of costly rework.
• Consulting Engineers: As a verification tool within construction oversight programs for sewer projects.
• Regulatory Authorities: To ensure compliance with project specifications and environmental regulations concerning sewer system performance.

These procedures apply to gravity-flow sewer pipe systems constructed with vitrified clay and may also be used where pipes of different materials are combined. The test ensures pipelines meet performance criteria prior to putting them into service or covering them with backfill.

Related Standards

ASTM C828-23 references several other important standards:

• ASTM C12: Practice for Installing Vitrified Clay Pipe Lines, providing guidance for proper installation techniques.
• ASTM C1091: Test Method for Hydrostatic Infiltration Testing of Vitrified Clay Pipe Lines, used when infiltration is suspected.
• ASTM C896: Terminology Relating to Clay Products, which clarifies terms specific to clay pipe standards.

Keywords: low-pressure air testing, vitrified clay pipe, gravity-flow sewer, pipeline integrity, sewer pipe standards, ASTM C828-23, air loss, pressure test, pipeline testing, municipal sewer testing

By adhering to ASTM C828-23, stakeholders ensure that vitrified clay sewer lines are robust, leak-free, and compliant with recognized industry best practices, supporting reliable and safe wastewater infrastructure.