33 05 05.43 - Mandrel Testing.pdf
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- Attached to
- Contract 2026-01: Maintenance & Emergency Contract (Excavation) – Project No. 7297. 0444
- Solicitation number
- Not on record
- Issued by
- York County, Pennsylvania
About this file
This is a technical specification document for mandrel testing procedures related to Contract 2026-01, a Maintenance & Emergency Contract for excavation work issued by West Manchester Township in Pennsylvania. The specification establishes requirements for deflection testing of plastic sewer piping, including PVC and ABS materials, which must be performed after backfilling has remained in place for a minimum of 30 days but no longer than 12 months. Testing must be conducted in the presence of the Township or Township Representative using "go, no go" mandrel equipment, with allowable maximum deflection not exceeding five percent of the original vertical internal diameter. Prior to testing, contractors must submit testing procedures, test equipment lists, testing sequence schedules, water disposal provisions, test gage calibration certifications, and mandrel drawings with calculations. The specification also requires lamping operations to verify uniform line and grade installation, with rejected pipe sections requiring removal and reinstallation at no additional cost to the Township.
The specification establishes quality control standards that contractors must meet at their sole expense, including excavation and replacement of any pipe exceeding allowable deflection limits, along with surface restoration. Testing equipment requirements include pull/retrieval ropes and mandrels with diameters not less than 95 percent of the base or average internal diameter of the pipe, with dimensions verified in accordance with ASTM D2122 standards. All deflection testing must be performed without mechanical pulling devices. The document references related sections addressing sanitary sewerage gravity piping materials, submittals procedures, execution requirements, and quality requirements, establishing a comprehensive framework for ensuring the structural integrity of installed plastic sewer piping systems.
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Text version
33 05 05.43 - MANDREL TESTING
Herbert, Rowland & Grubic, Inc. 33 05 05.43 - 1 007297.0444
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. “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 007297.0444
3.2 PREPARATION
A. Section 01 73 00 - Execution Requirements: Requirements for preparation.
B. Lamping:
1. Lamp gravity piping after flushing and cleaning in the presence of the Township or Township Representative.
2. Perform lamping operation by shining light at one end of each pipe section between manholes.
3. The Township or Township Representative will observe the 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 no longer than 12 months in the presence of the Township or Township Representative.
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. Pipe exceeding the allowable deflection shall be located, excavated, replaced, and retested at the sole expense of the Contractor, including surface restoration.
END OF SECTION
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