1028.4 Corrugated Polyvinyl Chloride (PVC) Pipe Inspection Guide
This guide will assist in the inspection of all types and configurations of corrugated Polyvinyl Chloride (PVC) pipe, sockets and fittings. Answer each question and take the action indicated for the answer given. If no condition is provided for a particular answer, move on to the next question. The inspector is responsible to confirm this inspection guide is in accordance with current specifications.
Every lot should be visually inspected. The lot that appears to have the defects, or a lot selected at random if all lots appear to be of equal quality, shall be inspected in greater detail to generally establish the Quality Control practices of the manufacturer. And at least one pipe per size offered in the lot shall be inspected in detail using this inspection guide. The manufacturer may provide the definition of a lot. If no definition is provided, a lot will be one day’s production. Or, if at the project, a lot shall be the entire quantity shipped.
If this inspection guide is used to inspect a rejected pipe, it shall be submitted with the notification to the manufacturer of the failure to meet specification.
| Has any of the material or pipe included in this lot been rejected during a previous inspection visit? If Yes, the entire lot is unacceptable. | Yes | No |
| Is this manufacturer approved for production of PVC pipe? (Refer to 106.1 Approved and Pre-Qualified Lists) If No, stop, the pipe is unacceptable. | Yes | No |
| Is the pipe accompanied by a bill of lading or delivery receipt at this location? If No, stop, the pipe is unacceptable. | Yes | No |
| Does the bill of lading or delivery receipt contain an itemized list of the sizes and lengths of pipe? If No, stop, the pipe is unacceptable. | Yes | No |
| Does the bill of lading or delivery receipt contain a MoDOT sample ID or is it accompanied by a Material Shipping Report Form? If No, stop, the pipe is unacceptable. | Yes | No |
| Does the bill of lading or delivery receipt contain the certified statement, “This certifies that the pipe, sockets, and fittings in this shipment are in accordance with MoDOT specifications and were fabricated at an approved plant.” If No, stop, the pipe is unacceptable. | Yes | No |
| Is the certified statement signed by an authorized representative of the manufacturer? If No, stop, the pipe is unacceptable. | Yes | No |
| Is the pipe marked (in accordance with ASTM F 949) with the manufacturer’s name, tradename, or trademark? If No, stop, the pipe is unacceptable. | Yes | No |
| Is the pipe marked (in accordance with ASTM F 949) with the nominal pipe size? If No, stop, the pipe is unacceptable. | Yes | No |
| Is the pipe marked (in accordance with ASTM F 949) with the designation of “ASTM F 949 (46 psi)” or “ASTM F 949 (115 psi)”? If No, stop, the pipe is unacceptable. | Yes | No |
| Is the pipe marked (in accordance with ASTM F 949) with the type of plastic “PVC” and minimum cell classification (ie. 12454-B)? If No, stop, the pipe is unacceptable. | Yes | No |
| Is the pipe marked (in accordance with ASTM F 949) with the extrusion code, including the date and location of manufacture? (The date and location may be encoded in the manufacturer’s extrusion code. If unsure, contact the manufacturer.) If No, stop, the pipe is unacceptable. | Yes | No |
| Do the markings repeat on the pipe on intervals not exceeding 5 ft? If No, stop, the pipe is unacceptable. | Yes | No |
| Are the letters of the markings at least ¼ in. tall? If No, stop, the pipe is unacceptable. | Yes | No |
| Are there any visible cracks, holes, foreign materials or other injurious defects that would be an indication of poor workmanship? If Yes, stop, the pipe is unacceptable. | Yes | No |
| Are the color, density and other physical properties uniform along the length of the pipe? If No, stop, the pipe is unacceptable. | Yes | No |
The outside diameter is measured by placing a circumferential wrap tape around the pipe, making sure the tape is flat against the pipe surface. The diameter reading is observed and estimated to the nearest 0.005 in. If a circumferential wrap tape is unavailable, a standard tape measure may be used instead. Wrap the tape measure around the pipe, keeping the tape as close and flat as possible, and read the circumference from the tape. To obtain the average outside diameter, repeat this process three times and average the observed values. Calculate the diameter using the following equation:
- Diameter = Circumference / 3.1415
| Is the average outside diameter within the specified tolerance? (Refer to Figure 1028.4 ASTM F 949.) If No, stop, the pipe is unacceptable. | Yes | No |
The wall thickness is measured using a cylindrical or ball anvil tubing micrometer (preferably accurate to within 0.001 in.). A minimum of 8 measurements are made at closely spaced intervals to ensure that the minimum and maximum wall thicknesses have been determined. The values are then averaged to obtain the average wall thickness. This process is used for inner, outer, and valley wall thickness.
| Is the inner, outer, and valley wall thickness greater than or equal to the corresponding minimum specified thickness (where applicable)? (Refer to Figure 1028.4 ASTM F 949.) If No, stop, the pipe is unacceptable. | Yes | No |
The average inside diameter is calculated from the average outside diameter and the effective wall thickness, te. The effective wall thickness will be measured using the same micrometer (described above) used make the other wall thickness measurements. The effective wall thickness will be the thickness of the pipe from the outside of the pipe to the inside of the pipe. Make at least 8 measurements at various locations along the circumference of the pipe. Average the 8 measurements to obtain the average effective wall thickness. Use the following equation to obtain the average inside diameter:
- Average Inside Diameter = Average Outside Diameter – (2 x te)
| Is the average inside diameter within the specified tolerance? (Refer to Table 1028.4.) If No, stop, the pipe is unacceptable. | Yes | No |
| Has 10 percent of the pipe in the same lot of pipe been rejected? If Yes, stop, the entire lot of pipe is unacceptable. | Yes | No |
Sockets and Fittings (where applicable)
| Are the sockets or fittings made of the same base material as the pipe? If No, stop, the couplings or fittings are unacceptable. | Yes | No |
| Do the socket dimensions meet the requirements given in Table 2 of ASTM F 949? If No, stop, the socket is unacceptable. | Yes | No |
| Do the fitting dimensions meet the requirements given in Table 3 of ASTM F 949? If No, stop, the fitting is unacceptable. | Yes | No |
| If molded fitting, does it meet the requirements given in Table 4 of ASTM F 949? If No, stop, the fitting is unacceptable. | Yes | No |
Figure 1028.4 ASTM F 949
Table 1028.4 Diameter Dimensional Tolerances (English)
| Nominal Pipe Size, Inch | Average Inside Diameter, Inch | Lower Tolerance, Inch | Lower Tolerance, mma | Upper Tolerance, Inch | Upper Tolerance,mma |
|---|---|---|---|---|---|
| 4 | 3 15/16 | 3 15/16 | 100 | 3 15/16 | 101 |
| 6 | 5 15/16 | 5 14/16 | 150 | 5 15/16 | 150 |
| 8 | 7 14/16 | 7 14/16 | 200 | 7 14/16 | 200 |
| 10 | 9 14/16 | 9 13/16 | 250 | 9 14/16 | 251 |
| 12 | 11 11/16 | 11 11/16 | 297 | 11 12/16 | 298 |
| 15 | 14 5/16 | 14 5/16 | 363 | 14 6/16 | 365 |
| 18 | 17 9/16 | 17 8/16 | 445 | 17 10/16 | 447 |
| 21 | 20 11/16 | 20 10/16 | 525 | 20 12/16 | 527 |
| 24 | 23 8/16 | 23 7/16 | 595 | 23 8/16 | 598 |
| 27 | 26 7/16 | 26 6/16 | 670 | 26 8/16 | 673 |
| 30 | 29 8/16 | 29 6/16 | 746 | 29 9/16 | 751 |
| 36 | 35 8/16 | 35 6/16 | 898 | 35 9/16 | 904 |
| a The metric dimensions have been approximately converted from their English counterparts. | |||||
