Clock Spring®

Cena: Zapraszamy do kontaktu z biurem


The Clock Spring® 8 layers, composite repair sleeve and reinforcement system, designed for high-pressure transmission pipelines.

Made up of a pretensioned unidirectional e-glass composite coil, a high-modulus filler material, and a high lap-shear strength methyl methacrylate adhesive, it is proven to 8,000 psi and has a design life beyond 50 years and installation history of more than thirty years, qualifying it as a permanent repair by regulators.

The Clock Spring sleeve can repair a broad range of mechanical damage and mill defects and can restore to full strength a pipeline with up to 80% wall loss.



  • Durable pre-tensioned e-glass fibers
  • Sized to fit standard pipe diameters
  • Available in 4-inch through 56-inch diameter kits
  • Can be installed underwater
  • Available in a high-temperature system
  • Meets standards of internationally recognized  repair codes
  • Is a 50-year DOT-accepted repair system for high-pressure transmission pipelines
  • Conforms to ASME PCC-2 and ISO 24817



  • Installs without disrupting operations
  • One hour to backfill from installation
  • Enhances short-term and long-term safet
  • Marking band system makes repairs
    visible to in-line inspection tools
  • No environmental hazards
  • No special tools to install
  • No hot work
  • No heavy lifting

Clock Spring is a licensed trademark of NCF Industries, Inc.

technical data sheet


CSNRI_PS_Clock-Spring EN