dimension ratio


Also found in: Dictionary, Financial.

dimension ratio

The average specified diameter of a pipe divided by the minimum specified wall thickness.
References in periodicals archive ?
Once the WPR is known, select the most cost-effective combination of HDPE pipe material and standard dimension ratio to provide the pressure class required.
In each case, the resin was converted into 8-inch (200 mm) nominal diameter pipe having a standard dimension ratio (SDR) of 11 and tested for RCP performance as follows.
Pipe wall thicknesses s in dependence on standard dimension ratio (SDR) and pipe outer diameter D used for numerical simulations.
It is found that an optimum dimension ratio exists for both vertically and horizontally polarized signals.
40 allowable design factor at operating pressure up to 200 psig (the current limit is 100 psig) if the minimum wall thickness is Standard Dimension Ratio 11 or thicker and the rapid crack propagation characteristics of each new pipe design are measured using accepted industry standard test methods.
In figure 9 and 10 it is shown diagrams of variation of equivalent stresses ([sigma]/p) in area ABCD for the case when dimension ratio k=B/[D.
2) The authors reported that sonographic features that most reliably indicate if a mass is benign are a round or oval shape, circumscribed margins, and a width-to-AP dimension ratio >1.
For example, a pipe with a 17:1 standard dimension ratio would be always rated at 250 psi, regardless of the outside diameter.