33 05 05.43 - Mandrel Testing.pdf
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- Attached to
- West Pump Station Replacement Project
- Solicitation number
- Not on record
- Issued by
- Chester County, Pennsylvania
About this file
This is a technical specification document for mandrel testing of plastic sewer piping, prepared by Herbert, Rowland & Grubic, Inc., in connection with the West Pump Station Replacement Project for the Northwestern Chester County Municipal Authority in Pennsylvania. The specification establishes requirements for deflection testing of polyvinyl chloride (PVC) and acrylonitrile butadiene styrene (ABS) sewer piping following installation and backfilling. Testing must occur after backfill has been in place for a minimum of 30 days but no longer than 12 months, utilizing a properly sized rigid ball or go/no-go mandrel with a diameter of no less than 95 percent of the pipe's internal diameter. Prior to testing initiation, contractors must submit testing procedures, equipment lists, testing sequence schedules, water disposal provisions, calibration certifications, and mandrel drawings and calculations. The specification also requires lamping operations to verify uniform line and grade installation, with rejection and reinstallation of non-compliant pipe sections.
The specification establishes a maximum allowable vertical ring deflection of five percent of the original vertical internal diameter for installed plastic sewer pipe. Testing must be performed without mechanical pulling devices, and any piping exceeding the allowable deflection threshold must be located, excavated, replaced, and retested at the contractor's expense. The document references ASTM D2122 for dimensional compliance and Section 01 33 00 submittal procedures, Section 01 73 00 execution requirements, and Section 01 40 00 quality requirements from the broader project specifications. Related work includes Section 33 31 11 for public sanitary sewerage gravity piping, which encompasses pipe materials, manholes, and accessories typical of gravity sewerage systems. No pricing information, funding sources, or contract award details are included in this technical specification section.
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Text version
33 05 05.43 – MANDREL TESTING
Herbert, Rowland & Grubic, Inc. 33 05 05.43 - 1 000483.0450
SECTION 33 05 05.43 – MANDREL TESTING
PART 1 - GENERAL
1.1 SUMMARY
A. Section Includes: Deflection testing of plastic sewer piping.
B. Related Requirements:
1. Section 33 31 11 – Public Sanitary Sewerage Gravity Piping: Pipe materials, manholes, and accessories normally encountered with gravity sewerage piping.
1.2 REFERENCE STANDARDS
A. ASTM International:
1. ASTM D2122 - Standard Test Method for Determining Dimensions of
Thermoplastic Pipe and Fittings.
1.3 SUBMITTALS
A. Section 01 33 00 – Submittal Procedures: Requirements for submittals.
B. Submit following items prior to start of testing:
1. Testing procedures.
2. List of test equipment.
3. Testing sequence schedule.
4. Provisions for disposal of flushing and test water.
5. Certification of test gage calibration.
6. Deflection mandrel drawings and calculations.
C. Test and Evaluation Reports: Indicate results of piping tests.
PART 2 - PRODUCTS
2.1 DEFLECTION TESTING
A. Equipment:
1. Properly sized rigid ball or “go, no go” mandrel.
2. Pull/retrieval ropes.
PART 3 - EXECUTION
3.1 EXAMINATION
A. Section 01 73 00 – Execution Requirements: Requirements for installation examination.
B. Verify that piping is ready for testing.
C. Verify that trenches are backfilled.
33 05 05.43 – MANDREL TESTING
Herbert, Rowland & Grubic, Inc. 33 05 05.43 - 2 000483.0450
3.2 PREPARATION
A. Section 01 73 00 – Execution Requirements: Requirements for preparation.
B. Lamping:
1. Lamp gravity piping after flushing and cleaning.
2. Perform lamping operation by shining light at one end of each pipe section between manholes.
3. Observe light at other end.
4. Pipe not installed with uniform line and grade will be rejected.
5. Remove and reinstall rejected pipe sections.
6. Clean and lamp until pipe section is installed to uniform line and grade.
C. Plugs:
1. Plug outlets, wye branches, and laterals.
2. Brace plugs to resist test pressures.
3.3 FIELD QUALITY CONTROL
A. Section 01 40 00 – Quality Requirements: Requirements for inspecting and testing.
B. Deflection Testing of Plastic Sewer Piping:
1. Perform vertical ring deflection testing on PVC and ABS sewer piping after backfilling has been in place for at least 30 days, but not longer than 12 months.
2. Allowable maximum deflection for installed plastic sewer pipe is no greater than five percent of original vertical internal diameter.
3. Perform deflection testing using properly sized rigid ball or “go, no go” mandrel.
4. Rigid Ball or Mandrel Diameter:
a. Not less than 95 percent of base or average ID of pipe.
b. Pipe Diameter: Comply with ASTM D2122.
5. Perform testing without mechanical pulling devices.
6. Locate, excavate, replace, and retest piping that exceeds allowable deflection.
END OF SECTION 33 05 05.43
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