Cherne® PROVING RING, 15 IN. 5% Deflection, SDR 35

The Cherne® Proving Ring, 15 in., 5% Deflection, SDR 35 (part #73237) is a precision verification ring used to confirm that a 15 in. SDR 35 deflection gauge (mandrel) remains true to the 5% deflection specification. Verifying the gauge with a proving ring before testing is standard practice — it proves the mandrel hasn't been worn, sprung, or tampered with, so acceptance test results can't be challenged.

Key Features

• Gauge verification — confirms your 15 in. deflection gauge is sized correctly before and after each test program
• Matched to SDR 35 at 5% deflection — built for the common 5% deflection acceptance spec on 15 in. SDR 35 PVC sewer pipe (ASTM D3034)
• Fast field check — a straightforward pass/no-pass verification with no lab measurement required
• Part of the Cherne® deflection testing system — one of a full range of standard proving ring sizes from 6 in. to 18 in.

Applications

Municipal inspectors and pipeline contractors use proving rings to certify deflection gauges before post-installation mandrel testing of large-diameter flexible SDR 35 sewer pipe, verifying correct bedding and backfill compaction.

Questions on sizing or bulk pricing? Call (866) 514-3684 or email us — we ship within the USA and welcome tax-exempt purchasing for qualified accounts.