Full ring ovalization test

Full Ring Ovalization test for determining the susceptibility to cracking of linepipe steels in sour service.

BS 8701, OTI 95 635

Typical Setup

FULL RING TEST

This test determines susceptibility to cracking of steel pipes in sour service.

A tubular specimen comprising a full circumferential ring is used. This test applies to any pipe with or without seam or girth weld.

Subodh Technologists is the FIRST and ONLY commercial metallurgical Laboratory in India to conduct this test.

It is covered under our ISO 17025 Scope of accreditation by NABL India (signatory to ILAC).

Sour service problems in susceptible pipeline steels are caused by the various forms of Hydrogen Damage due to the presence of wet hydrogen sulfide (H2S). An industry-proven technique for assessing pipeline steels is to stress a full ring specimen in a sour environment.

This Test uses a well tried experimental procedure to exert a known stress level at two regions on a full ring section of pipe steel.

The lab follows BS 8701 and OTI 95 635 Test Methods

Why Subodh?

  • Japanese Strain gauging system of the industry highest level.

  • Precise Loading Rig used for straining the ring specimen.

  • Controlled Environment complying to British and international safety standards.

  • In-House Ultrasonic examination during test.

  • Expert Interpretation of Test Results.

  • Following International Standards, Industry Best Practices and Validated Test Methods.