33 05 05.43 - Mandrel Testing.pdf
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- Lancaster County, Pennsylvania
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Mandrel Testing Specification Summary
This is a technical specification document for mandrel testing of plastic sewer piping, prepared by Herbert, Rowland & Grubic, Inc. for the Borough of Elizabethtown's sanitary sewer improvements project in Pennsylvania. The specification establishes requirements for deflection testing of PVC and ABS plastic sewer piping following backfilling and construction completion. Mandrel testing must be performed on all gravity sewer piping unless approved otherwise, with testing conducted between 30 days and 12 months after backfilling is completed. The testing utilizes properly sized "go, no go" mandrels with an outside diameter not less than 95 percent of the average internal diameter of the pipe being tested, along with pull/retrieval ropes. Testing procedures, equipment lists, testing sequence schedules, and calibration certifications must be submitted prior to commencing work.
The specification establishes that allowable maximum deflection for installed plastic sewer pipe is limited to no greater than five percent of the original vertical internal diameter, with testing performed without mechanical pulling devices in accordance with ASTM D2122 standards. Any piping exceeding the allowable deflection threshold must be excavated, replaced, and retested by the contractor at its own expense until successful results are achieved. The contractor bears full responsibility for determining causes of test failure and conducting all necessary corrective measures and retesting. This specification applies to the comprehensive sanitary sewer system upgrades included in the 2025 Sanitary Sewer Improvements Project, which encompasses approximately 409 linear feet of 8-inch sanitary sewer main, approximately 152 linear feet of 4-inch and 6-inch sanitary sewer laterals, and associated manhole work and spot repairs.
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Text version
33 05 05.43 - MANDREL TESTING
Herbert, Rowland & Grubic, Inc. 33 05 05.43 - 1 000598.0465
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 00 - Sanitary Sewerage 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. Certification of test gage calibration.
C. Test and Evaluation Reports: Indicate results of piping tests.
1.4 REQUIREMENTS
A. Mandrel Testing shall be performed on all gravity sewer piping unless approved otherwise.
1. Mandrel Testing shall be performed 30 days after backfilling for sewer construction has been completed and no longer than 12 months after backfilling of said construction.
B. The Contractor shall determine and correct the causes of test failure and retest until successful test results are achieved.
PART 2 - PRODUCTS
2.1 DEFLECTION TESTING
A. Equipment:
33 05 05.43 - MANDREL TESTING
Herbert, Rowland & Grubic, Inc. 33 05 05.43 - 2 000598.0465
1. Properly sized "go, no go" mandrel, O.D. not less than 95% of average I.D. of pipe to be tested.
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.
3.2 PREPARATION
A. Section 01 73 00 - Execution Requirements: Requirements for preparation.
B. 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 "go, no go" mandrel.
4. 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
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