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Common Causes of Flange Leaks and their Solutions

Introduction Common Causes of Flange Leakage By Vincent A. Carucci       A previous article highlighted the primary causes of flange leakage. This article provides more information about these. • Uneven Bolt Stress. An incorrect boltup procedure or cramped working conditions near the flange can leave some bolts loose while others are overtightened and […] Read More
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Surface preparations for an Affective Anti-corrosion Coating

Introduction Good surface preparation may be considered to be the most important part of the entire coating process in that the greatest percentage of coating failures can be traced directly to poor surface preparation. All paint or anti-corrosion coating systems will fail prematurely unless the surface has been properly prepared to receive the coating. If […] Read More
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Temporary and Permanent Pipe Leak Repairs

Introduction While most of the pipe repair components have a design basis in accordance with internationally recognised codes or standards. In most cases these codes or standards may not concern piping or pipelines, but concern pressure vessel type codes, such as ASME Section VIII: Pressure Vessel Code, or API 6H: Specification on End Closures, Connectors […] Read More
7. Apply Wrap Seal PLUS fiberglass repair tape Anti-corrosion coating

Anti-corrosion Coating Types and their Applications

Introduction This chapter covers the major types of coatings that are currently available for use and includes general information on the composition of coatings. It is intended to give basic information on coatings and is not a comprehensive guide to anti-corrosion coatings selection. The coating manufacturer is to be consulted if information on a specific […] Read More
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Pipe Leak Repair using Pipe Clamps

Introduction One of the main considerations that need to be taken into account when using a pipe repair clamps is the ability of the repair system to accommodate the pressure imposed axial loadings/stresses. The other main consideration is the pipe remaining wall thickness – if the mechanical strength of the pipe is sufficient to withstand […] Read More
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Types Protections Provided by Anti-Corrosion Coatings

Introduction In corrosion prevention by anti-corrosion coatings, three main principles are employed in various combinations: 1) Create a barrier that keeps out charged ions and retards the penetration of water and oxygen. 2) Ensure contact between the steel and a less noble metal (e.g. zinc in the coating) provides cathodic protection of the steel utilizing […] Read More
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Composite Repair for Pipe Corrosion and Leaks

Introduction Composite repairs are gaining popularity and acceptance worldwide among asset owners and operators. Composite repair methods and procedure are guided international engineering standards and provide an engineered, proven and durable solution to non-metallic pipe repair works. Components of composite repair materials generally comprise of filler rebuilding material, resin component and reinforcement layered sheet. Filler […] Read More
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Types of Breakdown of Corrosion Protection Coatings

Introduction Anti-corrosion coating breakdown is covered here from a physical viewpoint. BLISTERING VIA OSMOSIS Blistering is usually caused by the presence of ionic contamination or water soluble species at the interface between the anti-corrosion coating and the steel. Water is drawn from the environment through the anti-corrosion coating from an area of low ionic concentration […] Read More
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Notes for a Successful Composite Repair

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 DOCUMENTATION REQUIREMENT FOR VARIOUS OPERATING CONDITIONS   (1) BASIC MATERIAL […] Read More
corrosion protection coatings

Factors Affecting Lifetime of Corrosion Protection Coatings

Introduction For the reasons described in the previous chapter, corrosion requires a ready supply of oxygenated, conducting sea water and somewhere for the corrosion products to form. Anti-corrosion coatings work by firstly excluding water, ions and oxygen from reaching the steel and secondly, by preventing the products of the corrosion reaction from escaping from the […] Read More
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Different Type of Pipe Leak Repair Clamps and their Effectiveness

Introduction One of the fundamental aspects of a damaged/deteriorated pipe that dictates the type of repair component to be applied is the external pipe surface condition. If the external surface is damaged to the extent that an elastomeric seal cannot provide sufficient sealing forces in the immediate vicinity of the damage, or in the relatively […] Read More
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Factors influencing Rate of Corrosion

Introduction There are several factors influencing the rate of corrosion including diffusion, temperature, conductivity, type of ions, pH value and electrochemical potential. The rate of corrosion can be controlled or reduced by applying anti-corrosion coatings or corrosion protection techniques including composite repair compounds, metal repair putties and reinforcement wrap. We shall explore the different factors […] Read More
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Considerations before Performing Pipe Repairs

Introduction:   Pipe Repair Scenarios There are three main repair scenarios to be considered before performing pipe repairs; pipe subject to external metal loss (caused by corrosion or mechanical damage), pipe subject to internal metal loss (caused by corrosion, erosion or erosion/corrosion), and pipe fittings and components that are leaking. In addition to these main […] Read More
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Corrosion Resistance through the Application of Anti-Corrosion Coatings

Introduction Corrosion is the surface disintegration of metals within specific environment. There are basically three factors by which corrosion can be classified – nature of the corrodent, mechanism of corrosion, and appearance of the corroded metal. The classification is based on the surface morphology and it must be noted that the forms of corrosion are […] Read More
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5 Steps to Repair an Active Pipe Leaks

Introduction: Pipe erosion happens routinely and complete wall loss of pipe or through-crevice flaws are a general occasion at various spots. In the Oil & Gas and Offshore industry where burnable gasses are accessible, it is imperative to modify these types of pipe leaks and pipe blemishes with cold curing repair. This is because hot […] Read More
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10 Ways to Control Corrosion in Process Plants

Introduction Corrosion in industrial facilities and process plants is a costly mechanism. It could also have safety, environmental, and equipment reliability impacts and consequences. The top ten ways to control corrosion in process plants are as follows. 1. Corrosion of Buried Piping or Pipelines Apply impressed current cathodic protection and polarize the system to –850 […] Read More
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Effective Use of Composite Wrapping and its Repair Techniques

Introduction The use of composite materials for the repair of carbon steel pipework has been originally designed in accordance with ASME/ANSI B31.3: Chemical Plant and Petroleum Refinery Piping. The use of composite materials for the repair of pipework covers the following circumstances: ■   external corrosion only (no leakage and structural integrity needs to be […] Read More