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You must have JavaScript enabled in your browser to utilize the functionality of this website. This guide will assist in the inspection of all types and configurations of corrugated Polyvinyl Chloride (PVC) pipe, sockets and fittings. 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? Does the bill of lading or delivery receipt contain an itemized list of the sizes and lengths of pipe? Does the bill of lading or delivery receipt contain a MoDOT sample ID or is it accompanied by a Material Shipping Report Form? 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. Is the pipe marked (in accordance with ASTM F 949) with the manufacturer’s name, tradename, or trademark? 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)”? Is the pipe marked (in accordance with ASTM F 949) with the type of plastic “PVC” and minimum cell classification (ie. Is the pipe marked (in accordance with ASTM F 949) with the extrusion code, including the date and location of manufacture? Are there any visible cracks, holes, foreign materials or other injurious defects that would be an indication of poor workmanship?
The outside diameter is measured by placing a circumferential wrap tape around the pipe, making sure the tape is flat against the pipe surface.


Is the inner, outer, and valley wall thickness greater than or equal to the corresponding minimum specified thickness (where applicable)? The average inside diameter is calculated from the average outside diameter and the effective wall thickness, te. 3 ways determine pvc pipe size project - wikihow, How determine pvc pipe size project.
Pvc pipe & fittings sizes (dimensions), 1-877-pvc-fittings toll free 1-877-782-3488 customer service questions .
Resources, Tools and Basic Information for Engineering and Design of Technical Applications! An efficient and simple way to calculate the pressure loss in a piping system is the "Equivalent Pipe Length Method". 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.
A minimum of 8 measurements are made at closely spaced intervals to ensure that the minimum and maximum wall thicknesses have been determined. The effective wall thickness will be measured using the same micrometer (described above) used make the other wall thickness measurements.
And at least one pipe per size offered in the lot shall be inspected in detail using this inspection guide. If a circumferential wrap tape is unavailable, a standard tape measure may be used instead.
The effective wall thickness will be the thickness of the pipe from the outside of the pipe to the inside of the pipe. Make a Diagram of the Piping System Make a diagram where the system is structured with nodes as shown below.


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. Add Volume flow, Pipe Size and Pressure Loss for each Section Add actual pipe size and in each section. The pressure loss may alternatively be calculated with the Hazen-Williams Equation or the Darcy-Weisbach Formula. Add Equivalent Length of all Valves, Fittings and Straight Pipes Add the equivalent length of all valves, components, fittings and straight pipes in the sections. Summarize the Pressure Loss in each Section Calculate and summarize the pressure loss in each section. Summarize the Pressure Loss in all Paths Finally, add up the pressure loss in all sections that form unique paths.
In the example above there are two unique paths - one is section 0 - 2 - 3, the other is section 0 - 2 - 4. The Equivalent Pipe Length Method can be adapted to most piping systems - like water supply systems, gravity heating systems and similar.



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