Corrosion protection using induced-tension polymer wraps

■ One-piece construction

■ Totally UV-stable

■ High abrasion resistance

■ Facilitates substrate inspection

■ Custom-designed

■ Conforms to any size and shape

■ Hot work permit not required

■ 10-year warranty

Extra-large-diameter one-piece wraps on mooring monopiles, Yanbu, Saudi Arabia, January 2016

PROJECTS1st generation: Armawrap (manufactured by NICC, U.K.)

1985 Ju’aymah jetty, Saudi Arabia: Preventing marine borer attack in concrete1987 The Port Authority of New York & New Jersey: Protecting piles supporting runways at LaGuardia Airport1988 Shell: Protecting offshore, underwater mechanical conductor joints1990 BP, Total, Shell: Retro�tting offshore risers in the North Sea

2nd generation: Retrowrap (manufactured by NICC, U.K. and Corrosion Control International, U.S.)

1995 First utilization of textile-reinforced polyurethane composite in the U.S.

3rd generation: Retrowrap 2 (manufactured by Corrosion Control International, U.S.)

1996 Development of closure �ange1996 General Dynamics: Protecting piles in Groton, Connecticut2000–2010 Petrotrin: Multiple projects involving wellhead support piles2001 Autopistas de Puerto Rico: Protecting piles supporting the Teodoro Moscoso Bridge in San Juan, Puerto Rico2003 Louisiana DOT: Protecting piles supporting Lake Pontchartrain Causeway, Louisiana2004 Kuwait National Petroleum Company: Repairing failed coating on steel piles supporting new oil pier in Kuwait2006 Kuwait National Petroleum Company: Repairing piles supporting North Pier2006 Alcoa: Splash zone protection jackets for jetty, Jamaica2007 The Kuwait Ole�ns Company: Splash zone protection2007 Dow Chemicals: Protecting steel piles in Texas2008 The Port Authority of New York & New Jersey: Third phase of protecting piles supporting runways at LaGuardia2008 Atlantis: Protection of offshore conductors in Dubai2009 ConocoPhillips: Repairing steel piles in Vietnam2010 Port of Corpus Christi, Texas: Splash zone protection of turning dolphins2011 Brisbane City Council: Holman Street jetty in Brisbane, Australia

4th generation: Envirawrap and derivatives (produced in the U.S. by licensed manufacturers)

2013 Addressing both inshore and offshore requirements by providing �xed or adjustable closure �anges, multiple closing fasteners and using latest developments in molecular polymeric engineering to provide the ultimate ef�ciency through speed of installation with long-term UV and environmental service enhancements. Designed to accommodate steel (circular, hex or H con�guration), concrete (circular or square) and timber.

2013 Fluor, Mexico: Splash zone protection of jetty piles2014 Motiva/Shell, Rhode Island: Splash zone protection of jetty piles (with Corrosion Control Inc., Georgia)2014 Dow Chemicals, Freeport, Texas: Splash zone protection of jetty piles (with Corrosion Control Inc., Georgia)2014 BP, Gulf of Mexico: Heavy-duty protection (HD) of riser �eld joints (with Corrosion Control Inc., Georgia)2015 Costa Rica: Splash zone protection of jetty piles (with Coatsol Ltd, U.K.)2016 SABIC, Saudi Arabia: Splash zone protection of jetty piles

Induced-tension wrap systems provide an effective retro�t method of corrosion or environmental protection of risers, piles, and certain speci�c sections of subsea pipe work.

■ Easy one-piece installationFull-length Geon™ closure �anges are factory-�tted with corrosion-resistant self-threading fasteners.

■ Minimal surface preparationCorrosion-inhibited gel �ows to totally encapsulate and protect the substrate without the use of primers, �llers or tapes. The mechanical removal of marine growth and delaminated iron oxide is all that is necessary.

■ Tried-and-true technology20+ years of providing inshore splash zone and underwater corrosion protection for piles, pipelines and risers. Projects have been conducted from northern waters to the tropics.

■ Environmentally safeResidual elasticity within the multilayer fabric safely maintains the wrap in position and prevents leaching of the corrosion inhibitor into the environment.

NEW PRODUCT LINEENVIRA-H-WRAPSince the induced-tension wraps were �rst developed in 1985–87, the proven advantages have always been to reduce installation to its simplest possible form. Envira-H-Wrap continues this concept by utilizing a diver-friendly, gel-impregnated in�ll system as an alternative to the traditional rigid polystyrene blocks.

■ Corrosion rate monitoringMay be �tted with weight loss coupons or remote corrosion rate monitoring.

■ Custom-made to �tSuits any diameter from 50 mm to 3 meters. May be interlocked to accommodate any required protected length.

■ Built for the toughest environmentsWithstands the degradative in�uences of environmental UV, ozone and temperature variations. Highly abrasion- and impact-resistant.

■ Inspections made easyThe wrap can easily be opened and resealed to allow for substrate inspection.

■ RepairsIn the unlikely event of exterior damage, the wrap can be repaired by �tting another wrap over the damaged area.

ENVIRAWRAP STD (Standard)

Steel H-pile

In�ll expands to pre-shaped containment

Tension jacketwith closure �ange

Thixotropic gel

ENVIRAWRAP HD (Heavy-Duty)■ Multilayer, heavy-duty constructionEnvirawrap HD is the heavy-duty, multi-scrim version of the STD. It is speci�cally designed to provide protection to offshore oil and gas risers or inshore applications subject to external impact damage.

■ Easy installationAs with the STD, installation has been reduced to its simplest possible form, saving hours of diver and rigging time. Does not require substrate shotblast preparation.

■ Custom-made for tough conditionsSupplied in interlocking modular lengths. Polyurethane provides the highest abrasion resistance.

■ Active protectionAvailable with unique anti-fouling outer layer. Provides active protection with environmentally safe corrosion inhibitors.

BARGEWRAP■ Easy installationDesigned to provide simple high-speed installation for a multitude of subsea and onshore applications. Installation topside, underwater or in a pipeline trench is carried out with pneumatically or hydraulically operated tools, driving a reuseable closure caliper. Typical installation times for pipe diameters of 200–610 mm are 8 minutes per joint, depending on diameter. Cold-applied – no hot work permit required. Does not require shotblast substrate preparation.

■ Extreme performanceIndependently tested to operate in the temperature range of up to 120°C. Low-temperature versions are available for above-ground applications where ambient temperatures can be as low as –40°C.

■ Custom applicationsBargewrap provides an ultrafast alternative �eld joint coating solution on the lay barge and tie-in coating stations, or it may be applied subsea by divers, when used as a coating repair method. High-temperature, hydrophobic corrosion-inhibiting gel prevents water entrapment during underwater applications.

■ Perfect �tClosure around the joint is via a thermally formed �ange, designed to follow �eld joint contours. Hoop tension induced into the fabric during installation locks the system in place.

Custom-built white wraps for heat-re�ecting surface

Preparation: The wraps have been removed from the shipping crate, factory-gelled, and are ready for installation.

Installation: Diver using compressed air closure tool in �nal stages of installation. Note, the design permits installation in seas where swells can exceed one meter.

The Envirawrap is prepared ready for lifting into place via lifting lugs bonded to the outer surface layer.

Runway extension project was implemented to improve runway safety. The FAA required an additional 240 24” diameter piles, all protected with HD induced-hoop tension designed wrap. Corrosion Control Inc. and Strange Corrosion provided design, inspection and training services, as required by The Port Authority of NY & NJ.

In operations such as these, it is common to work from the underside of the deck to the lower splash zone.

Wraps are interconnected to provide any length of protection required by prevailing conditions.

Case studies

Turning dolphin

Jetty

LaGuardia Airport

111 Plaster House RoadSouthbury, CT 06488, USAmobile +1 203 233 7460fax +1 203 405 6095tony@strangecorrosion.com

How does Envirawrap work?Hoop tension imposed in the tough, resilient outer skin forces the inner layer against the surface of the substrate, thereby causing the sealant and its corrosion inhibitor to form a close association with the substrate.

The thixotropic nature of the sealant allows it to be exuded into any surface irregularities, thereby providing a seal and preventing the contact of oxygenated water against the riser, pipe or pile.

Since production began in 1985, Envirawrap has reached its �fth generation of product perfection.

Outer polyurethane layerHighly abrasion-resistant and UV-stable.Long-term environmental outer barrier.

Inner polyurethane layer

Memory-enhanced polyamide reinforcing scrimDuring installation, these scrims create hoop tension forces suf�cient to resist long-term creep, as well as one-hundred-year storms.

Polyester felt inner layerActive corrosion inhibitors or biocides are pre-blended into a range of hydrophobic and thixotropic gels. These gels are factory-applied to the absorbent felt inner layer in quantities calculated to provide a service life of more than 25 years.