Composite repair systems using composite wrap remain a constant repair option for industries requiring the repair and rehabilitation of piping systems. Various techniques and testing methods, which have the ability to handle different critical conditions onsite, are being developed in order to meet the demands of the industry. Composite wrap materials are recognized as a reliable and effective means of repairing corrosion damage, mitigating corrosion concerns and keeping critical piping systems in production.
Fundamentals of composite repair systems using composite wrap
While operating pressure is not always high, the chemicals and the elevated temperatures of some piping processes accelerate internal and external corrosion. In most cases, wall loss is severe and in many cases, it has become a safety hazard or is leaking. Through wall defects or complete wall loss and pinhole leaking is a regular occurrence within many facilities.
In order to repair these types of defects, a composite repair system must meet the minimum requirements and perform at the expected level under extreme conditions. Whilst numerous composite wrap materials are available on the market, there are few that have the testing and capability to perform at the elevated temperatures that may be experienced.
Types of composite repair systems
Layered systems and wet lay-up systems are general types of pipe repair systems used for composite repair. SealXpertTM Wrap Seal PLUSTM Fibreglass Wrap employs a fibreglass system that provides strength and stiffness, a resin matrix that is used to transfer the load between fibres. The wet lay-up system involves pre-impregnated fibreglass cloth that is activated in the flied by water.
An advantage composite repair system is that the cure state tends to be monolithic and can be used to cover a range of geometries, including tees, elbows, bends and even valves. When designing a repair system using composite wrap materials, engineers must consider both strength and stiffness. From a composite standpoint, strength relates to the tensile strength of a particular system, while stiffness relates to elastic modulus. For most conventional repair systems, there is a direct correlation.
For example, a uniaxial Fibreglass system will typically have an elastic modulus order of 5 x 106 psi to 6 x 106 psi. The strain to failure for E-glass is on the order of 2%. Therefore, one can conclude that typical failure stresses for uniaxial E-glass systems are between 100 ksi and 120 ksi.
Benefit of Composite Repair for Pipe and Tank Leaks Using Composite Wrap:
- Customized solution for through wall defects for pipes and tank walls
- Compliant installed by trained and certified applicators
- Engineering Calculation Report and Method of Statement for each repair
- ISO24817 and ASME PCC2 standards
- Provide excellent strength, bonding and chemical resistance
- Warranty for 20 years
Repair procedure using Composite Wrap for Pipe and Tank Leaks:
Benefit of Composite Repair for Pipeline Reinforcement Using Composite Wrap:
- Customized solution for thin wall defects for pipes and tank walls
- Compliant installed by trained and certified applicators
- Suitable for wall loss up to 80%
- Engineering Calculation Report and Method of Statement for each repair
- ISO24817 and ASME PCC2 standards
- Provide excellent strength, corrosion and chemical resistance
- Warranty for 20 years
Repair procedure using Composite Wrap for Pipeline Reinforcement:
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