{"id":5777,"date":"2026-05-24T11:15:01","date_gmt":"2026-05-24T11:15:01","guid":{"rendered":"https:\/\/www.pipetechservice.com\/?p=5777"},"modified":"2026-05-24T11:15:04","modified_gmt":"2026-05-24T11:15:04","slug":"what-causes-pipelines-to-deteriorate-over-time-6-primary-failure-mechanisms","status":"publish","type":"post","link":"https:\/\/www.pipetechservice.com\/ru\/what-causes-pipelines-to-deteriorate-over-time-6-primary-failure-mechanisms\/","title":{"rendered":"What Causes Pipelines to Deteriorate Over Time? 6 Primary Failure Mechanisms"},"content":{"rendered":"
This guide explains the six main causes of pipeline deterioration, how each mechanism works, and how to prevent failure in aging pipeline systems.<\/p>\n\n\n\n
What causes pipelines to deteriorate over time?<\/h2>\n\n\n\n
Pipelines deteriorate over time due to six primary mechanisms:<\/p>\n\n\n\n
\n
Corrosion<\/strong>\u00a0(internal and external chemical reactions)<\/li>\n\n\n\n
\u042d\u0440\u043e\u0437\u0438\u044f<\/strong>\u00a0from high-velocity flow or abrasive particles<\/li>\n<\/ul>\n\n\n\n
Among these, corrosion alone accounts for nearly 50% of all pipeline failures globally. Understanding these mechanisms helps operators prevent leaks, extend asset service life, and reduce maintenance costs.<\/p>\n\n\n\n
In real-world pipeline systems, these failure mechanisms rarely occur independently. Corrosion can initiate fatigue cracks, while mechanical damage can accelerate localized corrosion, creating compounded failure risks.<\/p>\n\n\n\n
1. Corrosion in Pipelines (Leading Cause of Failure)<\/h2>\n\n\n\n
Definition:<\/strong> Corrosion is an electrochemical process where metal reacts with its environment, causing gradual wall loss and eventual failure.<\/p>\n\n\n\n
Corrosion is the most common pipeline deterioration mechanism because it continuously removes metal through electrochemical reactions in both internal fluids and external soil environments. This mechanism occurs when four elements exist simultaneously: an anode, a cathode, an electrolyte, and a metallic return path.<\/p>\n\n\n\n
Key statistics on corrosion:<\/strong><\/p>\n\n\n\n
\n
Corrosion causes ~50% of all pipeline failures<\/li>\n\n\n\n
SRB-affected corrosion rates can reach 1\u20132 mm per year<\/li>\n\n\n\n
Replacing aging pipelines in the US alone requires over USD 1 trillion through 2030<\/li>\n<\/ul>\n\n\n\n
Internal corrosion is primarily driven by CO\u2082, H\u2082S, and dissolved oxygen, typically causing 0.1\u20131 mm per year of wall loss. External corrosion is mainly influenced by soil conditions such as moisture, resistivity, and stray current, with typical rates of 0.1\u20130.5 mm per year.<\/p>\n\n\n\n
Cause:<\/strong> Electrochemical reaction between pipe metal and its environment Effect:<\/strong> Progressive wall thinning leading to leaks or rupture \u0420\u0435\u0448\u0435\u043d\u0438\u0435:<\/strong> Coatings, cathodic protection, corrosion inhibitors, material selection<\/p>\n\n\n\n
Real-world example:<\/strong> In offshore oil pipelines, internal CO\u2082 corrosion combined with water presence frequently leads to localized pitting, which can penetrate the pipe wall in less than five years if not properly inhibited.<\/p>\n\n\n\n
2. Pipeline Fatigue Failure from Pressure Cycling<\/h2>\n\n\n\n
Definition:<\/strong> Fatigue is the progressive cracking of pipe material due to repeated pressure fluctuations over time, even when each individual cycle remains within design limits.<\/p>\n\n\n\n
Fatigue causes pipeline failure by initiating microscopic cracks that grow under repeated pressure cycles until sudden rupture occurs. Unlike corrosion which causes gradual wall thinning, fatigue accumulates microscopic damage with each pressure cycle.<\/p>\n\n\n\n
Crack propagation<\/strong>\u00a0through the wall thickness with each pressure cycle<\/li>\n\n\n\n
Rapid fracture<\/strong>\u00a0when remaining wall can no longer contain operating pressure<\/li>\n<\/ol>\n\n\n\n
Cause:<\/strong> Repeated pressure fluctuations from pump starts, valve closures, and flow changes Effect:<\/strong> Cumulative microscopic damage leading to sudden brittle fracture \u0420\u0435\u0448\u0435\u043d\u0438\u0435:<\/strong> Pressure management, regular inspection, fatigue-resistant materials<\/p>\n\n\n\n
When corrosion and fatigue interact, the combination proves more dangerous than either mechanism alone. This corrosion-fatigue interaction means a pipe that might withstand millions of pressure cycles in a neutral environment may fail in thousands of cycles when corrosion pits provide ready crack initiation sites.<\/p>\n\n\n\n
3. Third-Party Damage to Pipelines<\/h2>\n\n\n\n
Definition:<\/strong> Third-party damage refers to external interference from construction activities, excavation equipment, vehicle impacts, or vandalism that causes immediate pipe deformation or penetration.<\/p>\n\n\n\n
Unlike time-dependent degradation mechanisms such as corrosion or fatigue, third-party damage occurs unpredictably and often causes immediate, severe wall damage. Nearby construction activities pose the greatest threat to buried pipelines.<\/p>\n\n\n\n
Common Mechanical Damage Scenarios<\/h3>\n\n\n\n
\n
Excavator buckets and backhoes creating dents, gouges, or penetrations<\/li>\n\n\n\n
Heavy vehicle traffic causing pipe deflection or joint separation<\/li>\n\n\n\n
Cause:<\/strong> External mechanical force from construction, excavation, or impacts Effect:<\/strong> Immediate denting, gouging, or penetration with potential for delayed failure \u0420\u0435\u0448\u0435\u043d\u0438\u0435:<\/strong> Proper burial depth, warning tape, one-call systems, right-of-way surveillance<\/p>\n\n\n\n
Even when initial damage does not cause immediate leakage, the resulting stress concentration and coating damage create vulnerable points where future failures will initiate.<\/p>\n\n\n\n
4. Stress Corrosion Cracking in Pipelines (SCC)<\/h2>\n\n\n\n
Definition:<\/strong> Stress corrosion cracking is the growth of cracks in a pipeline caused by the combined effect of tensile stress and a specific corrosive environment, occurring at stress levels well below normal design limits.<\/p>\n\n\n\n
SCC proves particularly insidious because it requires three conditions to occur simultaneously. Remove any one condition, and SCC cannot happen.<\/p>\n\n\n\n
The Three Required Conditions for SCC<\/h3>\n\n\n\n
\n
Susceptible material<\/strong>\u00a0(certain steel metallurgies prove more vulnerable)<\/li>\n\n\n\n
Tensile stress<\/strong>\u00a0(applied operational stress or residual stress from manufacturing\/welding)<\/li>\n\n\n\n
Specific corrosive environment<\/strong>\u00a0(high-pH carbonate-bicarbonate or near-neutral pH solutions)<\/li>\n<\/ul>\n\n\n\n
Cause:<\/strong> Combined tensile stress and a specific corrosive environment Effect:<\/strong> Crack growth through pipe wall without significant wall thinning \u0420\u0435\u0448\u0435\u043d\u0438\u0435:<\/strong> Stress reduction, coating quality, cathodic protection, material selection<\/p>\n\n\n\n
Two distinct SCC forms affect steel pipelines. High-pH SCC develops at pH above 9, producing intergranular cracks. Near-neutral pH SCC occurs at pH 6-7, producing transgranular cracks. Each form requires different mitigation strategies.<\/p>\n\n\n\n
Hydrogen-Related Damage Mechanisms<\/h3>\n\n\n\n
Hydrogen-related damage mechanisms cause pipeline failure by reducing steel ductility and creating internal cracks that can lead to sudden rupture.<\/p>\n\n\n\n
Hydrogen-induced cracking occurs when atomic hydrogen enters the steel lattice and recombines at internal interfaces. Sulfide stress cracking is a primary concern for high-strength steels in sour oil and gas environments.<\/p>\n\n\n\n
5. Microbiologically Influenced Corrosion (MIC) in Pipelines<\/h2>\n\n\n\n
Definition:<\/strong> Microbiologically influenced corrosion is pipeline deterioration caused by bacterial metabolic byproducts\u2014primarily hydrogen sulfide and organic acids\u2014that create highly aggressive local chemistry at the pipe surface.<\/p>\n\n\n\n
Microorganisms do not directly “eat” metal. Instead, sulfate-reducing bacteria (SRB) and related species produce corrosive metabolic byproducts directly at the pipe surface. Biofilms develop on the pipe wall, maintaining corrosive conditions even when bulk fluid chemistry appears benign.<\/p>\n\n\n\n
Cause:<\/strong> Bacterial metabolic byproducts (H\u2082S, organic acids) at the pipe surface Effect:<\/strong> Localized pitting and accelerated wall loss under biofilms \u0420\u0435\u0448\u0435\u043d\u0438\u0435:<\/strong> Biocide treatment, pigging, coating integrity, oxygen exclusion<\/p>\n\n\n\n
Why MIC Is Particularly Dangerous<\/h3>\n\n\n\n
\n
Field data shows SRB-affected corrosion can proceed at 1\u20132 mm per year<\/li>\n\n\n\n
Typical steel pipelines (6-12 mm wall thickness) can perforate in 3-6 years<\/li>\n\n\n\n
Standard corrosion inhibitors may not penetrate biofilms effectively<\/li>\n\n\n\n
Detection requires specialized DNA analysis or biofilm sampling<\/li>\n<\/ul>\n\n\n\n
6. Erosion Corrosion in Pipelines<\/h2>\n\n\n\n
Definition:<\/strong> Erosion is the mechanical removal of protective oxide layers or pipe material caused by high-velocity flow, suspended solids, or turbulent conditions at direction changes.<\/p>\n\n\n\n
Erosion is a key cause of pipeline failure in high-velocity systems, particularly in oil and gas pipelines carrying sand, scale, or other abrasive particles. Erosion-corrosion accelerates attack at specific locations where flow patterns change dramatically. This mechanism proves most severe at elbows, tees, reducers, and valves where turbulence and particle impingement occur.<\/p>\n\n\n\n
Cause:<\/strong> High-velocity flow, suspended abrasives, and turbulence at direction changes Effect:<\/strong> Mechanical removal of protective layers and base metal \u0420\u0435\u0448\u0435\u043d\u0438\u0435:<\/strong> Flow velocity management, erosion-resistant alloys, flow modeling<\/p>\n\n\n\n
Flow Velocity Effects on Pipeline Deterioration<\/h3>\n\n\n\n
\n
Low velocity<\/strong>\u00a0(< 0.5 m\/s): Allows solids and water to settle, creating under-deposit corrosion<\/li>\n\n\n\n
Optimal velocity<\/strong>\u00a0(0.5\u20133 m\/s): Maintains solids suspension without erosional damage<\/li>\n\n\n\n
High velocity<\/strong>\u00a0(> 3 m\/s): Causes erosion-corrosion at direction changes and fittings<\/li>\n<\/ul>\n\n\n\n
Real-world example:<\/strong> In sand-producing oil wells, erosion at downstream elbows can reduce wall thickness by several millimeters per year, requiring frequent inspection and replacement of affected fittings.<\/p>\n\n\n\n
How to Detect Each Pipeline Failure Mechanism<\/h2>\n\n\n\n
UT at high-risk locations (elbows, tees)<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
Summary of Pipeline Failure Mechanisms<\/h2>\n\n\n\n
Pipeline deterioration occurs due to six primary mechanisms: corrosion, fatigue, third-party damage, stress corrosion cracking, microbiologically influenced corrosion, and erosion. These mechanisms often interact, accelerating failure rates and reducing pipeline service life. Understanding why pipelines fail over time requires recognizing that degradation rarely results from a single cause but rather from combinations of mechanical, chemical, and biological attacks.<\/p>\n\n\n\n
In real-world pipeline systems, these failure mechanisms rarely occur independently. Corrosion can initiate fatigue cracks, while mechanical damage can accelerate localized corrosion, creating compounded failure risks.<\/p>\n\n\n\n
How Deterioration Progresses Over Time<\/h2>\n\n\n\n
Understanding the timeline of pipeline deterioration helps operators plan inspection and maintenance intervals effectively.<\/p>\n\n\n\n
Rehabilitation or replacement planning<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
Steel pipelines are typically designed for a service life of about 50 years, although many operate longer with proper maintenance. Failure rates increase approximately 27 percent with pipeline age, with average failure occurring beyond 50 years of service. The pipeline aging process accelerates once coatings degrade and corrosion initiates, making early intervention critical for life extension.<\/p>\n\n\n\n
Q: What causes pipelines to fail over time?<\/strong> A: Pipelines fail over time due to corrosion, fatigue, mechanical damage, stress corrosion cracking, microbiological activity, and erosion, often acting together to weaken the pipe structure.<\/p>\n\n\n\n
Q: What is the main cause of pipeline failure?<\/strong> A: Corrosion is the leading cause, responsible for about 50 percent of pipeline failures worldwide.<\/p>\n\n\n\n
Q: How long do steel pipelines typically last?<\/strong> A: Steel pipelines are typically designed for a service life of about 50 years, although many operate longer with proper maintenance.<\/p>\n\n\n\n
Q: Can deteriorated pipelines be repaired?<\/strong> A: Yes. Composite wrap systems, steel sleeves, and robotic internal linings can restore integrity without pipeline replacement.<\/p>\n\n\n\n
Q: How does flow rate affect pipeline deterioration?<\/strong> A: Low flow allows solids to settle causing under-deposit corrosion. High flow causes erosion-corrosion at elbows and fittings.<\/p>\n\n\n\n
Q: Does pipeline material affect deterioration resistance?<\/strong> A: Yes. HDPE, PVC, and fiberglass offer different corrosion resistance than carbon steel, though each material has distinct failure mechanisms.<\/p>\n\n\n\n
Q: What is erosion corrosion in pipelines?<\/strong> A: Erosion corrosion is the accelerated material loss caused by high-velocity flow combined with abrasive particles, typically occurring at elbows, tees, and other direction changes.<\/p>\n\n\n\n
Pipeline Integrity Support for Aging Infrastructure<\/h2>\n\n\n\n
Understanding pipeline degradation mechanisms enables targeted prevention. Our services are designed to address all major pipeline failure mechanisms, including corrosion, fatigue, SCC, and erosion, helping operators extend pipeline service life and reduce failure risk.<\/p>\n\n\n\n
Typical use cases:<\/strong><\/p>\n\n\n\n
\n
Aging pipelines with active corrosion defects requiring engineered repairs<\/li>\n\n\n\n
Pipelines requiring life extension beyond 30\u201350 years of service<\/li>\n\n\n\n
Pre-construction integrity assessments for legacy pipeline relocation<\/li>\n<\/ul>\n\n\n\n
Our core competencies:<\/strong><\/p>\n\n\n\n
Hot Tap and Line Stop Services<\/strong> \u2013 Pressurized pipeline interventions up to 48-inch diameter with zero system downtime. Each fitting design follows ASME PCC-2 calculations for branch reinforcement and stress distribution.<\/p>\n\n\n\n
Composite Repair Systems<\/strong> \u2013 Engineered wraps for corroded pipe sections. JSW engineers calculate required laminate thickness based on operating pressure, pipe geometry, defect dimensions, and remaining service life requirements.<\/p>\n\n\n\n
Pipeline Inspection and Analysis<\/strong> \u2013 Intelligent pigging fleet including MFL, UT, and EMAT tools capable of detecting wall loss, cracking, and geometric anomalies in single passes.<\/p>\n\n\n\n
Emergency Leak Repair<\/strong> \u2013 24\/7 response for urgent integrity threats.<\/p>\n\n\n\n
Professional engineers (PEs) on staff reviewing every repair design<\/li>\n\n\n\n
Real-time remote monitoring during all intervention operations<\/li>\n\n\n\n
Standard 5-year warranty on composite repairs<\/li>\n\n\n\n
Zero lost-time incidents across 500+ consecutive project days<\/li>\n<\/ul>\n\n\n\n
Contact JSW’s integrity engineering team for a pipeline deterioration assessment and prioritized repair recommendations based on remaining life calculations.<\/p>\n\n\n\n
<\/p>","protected":false},"excerpt":{"rendered":"
This guide explains the six main causes of pipeline deterioration, how each mechanism works, and how to prevent failure in aging pipeline systems. What causes pipelines to deteriorate over time? Pipelines deteriorate over time due to six primary mechanisms: Among these, corrosion alone accounts for nearly 50% of all pipeline failures globally. Understanding these mechanisms […]<\/p>\n","protected":false},"author":1,"featured_media":5778,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_surecart_dashboard_logo_width":"180px","_surecart_dashboard_show_logo":true,"_surecart_dashboard_navigation_orders":true,"_surecart_dashboard_navigation_invoices":true,"_surecart_dashboard_navigation_subscriptions":true,"_surecart_dashboard_navigation_downloads":true,"_surecart_dashboard_navigation_billing":true,"_surecart_dashboard_navigation_account":true,"_uag_custom_page_level_css":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[701],"tags":[900,901,902,127,595],"class_list":["post-5777","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-trenchless-technology","tag-causes-of-pipeline-corrosion","tag-pipeline-deterioration-mechanisms","tag-pipeline-fatigue-failure","tag-pipeline-integrity-management","tag-stress-corrosion-cracking"],"yoast_head":"\n