Clock Spring|NRI – Composite Wraps

ClockSpring|NRI is the world’s leading manufacturer of permanent and temporary Composite Pipeline Repair solutions. The recent merger of Clock Spring and NRI companies provides PipeServ access to the full suite of highly engineered composite repair, rehabilitation, and construction solutions for critical infrastructure. ClockSpring|NRI’s products are designed to provide structural reinforcement, leak repair, and corrosion prevention for pipeline and process piping applications. ClockSpring|NRI’s proven solutions are quick to install, cost effective, and can be installed without service interruption.

ClockSpring|NRI repairs, once cured, make the repaired pipe stronger than the original; allowing you to continue operating at the MAOP (Maximum Allowable Operating Pressure).

Clock Spring® was verified through the most comprehensive pipeline repair study ever commissioned. The 10-year, $15 million study by the pipeline industry and conducted by the Gas Research Institute, makes the patented Clock Spring the most tested, investigated, and documented composite repair solution ever developed.  It is used in all environments in more than 75 countries around the world.

ClockSpring|NRI pipe repair systems are engineered in accordance Australian and International Standards (AS 2885, ASME PCC2, ISO 24817 and ASTM) as a “permanent repair system” for gas and liquid pipelines.


CLOCKSPRINGCOILS   – Clock Spring Repair System – Technical Brief PDF

Clock Spring Pipeline composite repair sleeve

Clock Spring is a composite wrap repair sleeve and reinforcement system uniquely designed for high-pressure transmission pipelines. Our strongest pipe repair, the Clock Spring, has been tested and proven up to 8,000 psi and is expected to last 50 years or longer, deeming it a permanent repair by regulators.
 Pressure Range=Unlimited
Temp = -29C to +120C
Wall Loss = Up to 80%
Pipe NB – 4″ up to 56″ 

CONTOUR COMPOSITE WRAP-  ClockSpring|NRI Contour Repair -Technical Brief PDF

Clock Spring contour composite Wet applied repaired system Contour is the ideal composite wrap option for internal or external corrosion repairs or repairs that involve complicated geometry such as tees, flanges, and varying diameter pipe. It is regularly used in plants, refineries, tank farms, terminals, and offshore locations to repair a variety of pipe defects, including leaks.

Pressure Range=up to 48 Barg
Temp = –50C to +135C
Wall Loss = Up to 100%
Pipe NB – 3/4″ up to 56″

SNAP WRAP – ClockSpring|NRI Snap Wrap – Technical Brief PDF

Clock Spring composite reinforcment for pipesSnap Wrap is a multi-layered system of high strength, corrosion resistant fiberglass composite split sleeves, installed with a high performance adhesive and a filler material. Snap Wraps are installed easily, even in locations with tight access, and no cutting or welding is required

Pressure Range=up to 69 Barg
Temp = -29C to +120C
Wall Loss = Up to 90%
Pipe NB – 3/4″ up to 56

PIPE SUPPORT –  ClockSpring|NRI Pipe Support – Technical Brief PDF

Clock Spring Pipe Support Protection

Pipe Support is a high-strength, corrosion-resistant fiberglass composite sleeve used at any location with metal-to-metal contact or where atmospheric corrosion may occur.
Designed as a preventative measure, CS Pipe Support reduces future maintenance expenses by:
Protecting coating from abrasion
Ensuring no water collecting at contact points
The Clock Spring Pipe Support can be installed on new piping but also as a repair; if corrosion is found in these areas.

Thermo-Wrap™ Inspectable is designed to work in high temperatures and is suitable for repairing damaged process piping. This solution is engineered for “inspectability” using common radiographic inspection methods. With Thermo Wrap™ Inspectable, it is possible to monitor the integrity of an in-service repair through the course of its intended design life.


  • Flare lines, blowdown lines, steam piping, chemical processing lines
  • Girth welds
  • Elbows, tees, flanges
  • High-temperature environments to 160°C (320°F)

LEAK STOP – Clock Spring|NRI Leak Stopper – PDF

Leak repair clamp

With a clamping strength of 5,929 lbf, the Clock Spring Leak Stopper is ideal for oil and gas pipelines, refineries and petrochemical plants, and municipal water and gas distribution lines, replacing costly and cumbersome bolt-on products and clamps that require more time to install and introduce greater risk.

Benefits: increases safety, reduces  environment impact and huge cost savings

  • Business benefits include no disruption to operations, lower costs in equipment and cutting and welding, as well as the opportunity to retain tariff revenue
  • Safety benefits include no hot work, no cranes or overhead lifts, and faster time to close the ditch
  • Environmental benefits include eliminating the need to empty, depressurize or off-gas the line, ensuring no contaminants enter the environment

PipeServ can supply and install or train your personal to install CS products on pipelines, refineries and facilities across Australia, Papua New Guinea and New Zealand

Product Selection Poster PDF
Contour Examples PDF