Also found in: Dictionary, Thesaurus, Financial, Acronyms, Wikipedia.

dimension ratio

The average specified diameter of a pipe divided by the minimum specified wall thickness.

standard dimensions ratio (SDR)

The ratio of the average specified outside diameter to the minimum specified wall thickness of a pipe.
References in periodicals archive ?
You do not have to have an AEPS userid to submit an SDR but you do need the userid to check the status in AEPS.
NAVSISA was given the task to develop an enhancement to the SDR Web site that would meet this goal.
Kimball said SDR has contracts with 10 state governments, several federal agencies and numerous municipal governments.
At the direction of the NAVAIR/NAVSUP International Logistics Enterprise Team (ILET), a QDR form, see Figures 4 and 5, was developed to improve and supplement the SDR process.
a leading global technology distributor, today introduced the PicoZed SDR Z7035/AD9361, a rugged, low-power, small footprint system-on-module (SOM) that integrates critical RF signal path and high-speed programmable logic, enabling designers to dramatically reduce cycle times for development of the RF-to-baseband signal processing core for wireless communications systems.
On December 22, 2014, the Executive Board of the International Monetary Fund (IMF) decided to replace the three-month Eurepo rate as the euro component of the SDR interest basket with the three-month spot rate for euro area central government bonds with a rating of AA and above published by the European Central Bank (click link for details about the interest rate and the estimation method).