Our High Collapse (HC) grades exhibit higher collapse pressure than what is determined by API 5CT/ISO 11960 products.

PROPRIETARY GRADE FIT FOR HIGH-PRESSURE SERVICE
Tenaris provides the High Collapse Series of proprietary steel grades for oil and gas wells where high external pressures are anticipated and collapse resistances higher than API are needed.

In addition to uniform external pressures, the reservoir can exert high pressures due to ground movements or saline strata, subjecting pipes to extreme localized external pressure.

Our HC Series is available in minimum yield strengths ranging from 80Ksi to 140Ksi. These products have higher guaranteed collapse pressure than that determined by API 5CT/ISO 11960 products.