Notes for a Successful Composite Repair

blog-img

Introduction

In order to determine a suitable composite repair solution, the operator should provide the following information:

• Pipeline design and operating pressure;

• Pipeline design and operating temperature;

• Pipeline medium;

• Required lifetime of the repair.

DOCUMENTATION AND DATA REQUIREMENTS FOR PIPEWORK REPAIRS

Composite Repair1 300x221 - Notes for a Successful Composite Repair

DOCUMENTATION REQUIREMENT FOR VARIOUS OPERATING CONDITIONS

Composite Repair8 225x300 - Notes for a Successful Composite Repair 

(1) BASIC MATERIAL DOCUMENTATION.

Basic material documentation including Technical Data Sheet, Material Safety Data Sheet should be provided by the supplier. Basic data on material chemical compatibility with the working environment should also be available.

Composite Repair6 300x169 - Notes for a Successful Composite Repair

(2) DESIGN CAPABILITY

Organisations who offer a repair option for pressurised parts need to have an understanding of the design issues associated with their product and be able to provide Engineering Calculations with supporting data. Suppliers must have a competent engineering capability.

Composite Repair4 300x225 - Notes for a Successful Composite Repair

(3) SURFACE PREPARATION

Surface preparation is one of the single most important aspect to determine the quality and success of the pipe repair. The durability of a bonded assembly under applied load is determined to a large extent by the quality of the surface preparation used. For the higher specification duties and for those that are critical to safety, a surface treatment is recommended to promote bonding and to retain its integrity over the required operational period. Details of surface preparation and implementation procedure and standards required should be specified.

Composite Repair3 300x169 - Notes for a Successful Composite Repair

(4) SHORT-TERM TEST DATA

Short term test data should include tensile strength and modulus values in both the hoop and axial directions of the repair. For permanent and medium/ high pressure (> 5barg) loads bond strength tests to demonstrate the efficacy of the chosen surface preparation methods should also be carried out.

Composite Repair2 300x243 - Notes for a Successful Composite Repair

(5) LONG-TERM DURABILITY DATA

Satisfactory designs can be achieved for pressures up to 20 barg based on short-term data that has been adjusted by a suitable factor. However, for safety critical service and the higher pressure duties (up to 50 barg), long-term durability data should be provided to demonstrate fitness for purpose. Long-term effects by fluids and exposure to ultraviolet light should be addressed.

Active Pipe Leaks 6 300x202 - Notes for a Successful Composite Repair

(6) METHOD OF STATEMENT AND RISK ASSESSMENT

A detailed method of statement and risk assessment of the repair work should be documentation accordingly to each repair scenarios. Proper test procedure and standards should be included and implemented at each stage of repair works to ensure compliance. It is necessary to ensure that product applicators are trained and certified by the supplier.

Checking of Pipeline 169x300 - Notes for a Successful Composite Repair

(7) IMPLEMENTATION DOCUMENTATION

The applicators for each repair should document the repair works with daily site reports and close-out reports with step-by-step implementation photos.

Leak Repair Inspection11 300x192 - Notes for a Successful Composite Repair

(8) HEALTH AND SAFETY DOCUMENTATION

Many of the repair methods involve the handling of chemicals which are inflammable and/or toxic and which pose a hazard to personnel. Assessments should be available for all the chemical species concerned and the material supplier should provide documentation. Due attention to suppliers instructions, the use of simple safety equipment, and good housekeeping is necessary.

Related Post

Here are a few stages to help you manage pipes blast and pipes spills. This article manages impermanent repair as opposed to supplanting the pipe. The water supply is under pressure, usually around 40 to 60 psi. A patch on a leak obliges counter-pressure and a compressible material to help in embellishment it to the […]
Introduction Anti-corrosion coatings do not last forever. They age, weaken and deteriorate and eventually their useful life ends. The most common cause for premature anti-corrosion coating failure is insufficient care during the mixing, application and curing processes. Poor application technique can typically cause problems such as improper thickness, pinholes, sags, mud-cracking, and holidays. Inadequate surface […]
TOP