Corrosion Coupon Assembly Introduction
A corrosion coupon assembly is a critical component in monitoring pipeline corrosion rates. It typically consists of a metal strip or specimen that mimics the pipeline material. Operators insert these coupons into the pipeline’s flow. Over time, they expose the coupons to the same conditions as the pipeline. After a set period, they retrieve and analyze the coupons to assess corrosion levels. This process allows for accurate measurement of material loss and corrosion rate. Moreover, it helps in predicting the pipeline’s lifespan.
Operators can make informed decisions on maintenance and replacements based on these insights. Thus, corrosion coupon assemblies are essential for maintaining pipeline integrity and safety. Additionally, their use helps in optimizing operational costs by preventing over-maintenance and early failures. Their simple yet effective functionality makes them a staple in industries reliant on pipelines, such as oil and gas. Overall, these assemblies provide invaluable data, enhancing operational efficiency and safety standards.
Модель выбора
Модель | |||||||||||||
КУБОВЫЙ | Купоны на коррозионную стойкость | ||||||||||||
-Код | Корпус свечи в сборе | ||||||||||||
Пх | Тип | Материал | Запечатывание Материал | ||||||||||
0 | Нет запроса | 0 | КС | 0 | Нет запроса | ||||||||
1 | Полый Корпус вилки | 1 | 316SS | 1 | Уплотнительное кольцо из витона / первичная набивка из ПТФЭ | ||||||||
2 | Прочный корпус вилки | 2 | 316ЛСС | 2 | HNBR | ||||||||
3 | DUPLEX SS | ||||||||||||
4 | ИНКОНЕЛЬ | ||||||||||||
Тип Держатель купона | |||||||||||||
СР | Fixed Держатель купона для сборки прямоугольных талон | ||||||||||||
АР | Adjustable Держатель купона для сборки прямоугольных талон | ||||||||||||
ЛР | Ladder Coupon Holder for assembling rectangular coupon | ||||||||||||
СК | Fixed Держатель купона для сборки круговых талон | ||||||||||||
Переменный ток | Adjustable Держатель купона для сборки круговых талон | ||||||||||||
-Размер трубы | |||||||||||||
x | Pipe Size in inch | ||||||||||||
– Талон Размер | |||||||||||||
А×В×К | Талон Размер в дюймах или мм | ||||||||||||
– Материал купона | |||||||||||||
x | Grade | ||||||||||||
-Отделка Талон | |||||||||||||
0 | Mill | ||||||||||||
1 | Glass Bead | ||||||||||||
– Изоляционная прокладка | |||||||||||||
0 | No Gasket | ||||||||||||
1 | Nylon Gasket | ||||||||||||
2 | PTFE Gasket | ||||||||||||
For Example CC-P221-SR-6″-3″×1/2″×1/8″-MS1018-0-2 CC: Corrosion Coupon | |||||||||||||
P221: Solid Plug Body in 316LSS Viton O-Ring and PTFE Primary Packing | |||||||||||||
SR-6″:Fixed Coupon Holder for assembling rectangular coupons and for 6″pipe | |||||||||||||
3″×1/2″×1/8″: Талон Size MS1018: Материал купона | |||||||||||||
0: Finishing of Купон - Мельница 2: Material of Isolation Gasket is PTFE |
Corrosion Coupon Types (Corrosion Coupon Assembly)
Имя | Strip Coupon | Multihole Strip Coupon | Disc Coupon |
Applications | Commonly used for most evaluations. | Use with low-pressure access equipment or through narrow ports that a standard 3/4 inch wide coupon cannot pass. | These circular coupons work in multiple disc monitoring applications. |
Размер | 3”*3/4”*1/16” (76.2mm*19.0mm*3.2mm) | 3”*1/2”*1/16” (76.2mm*12.7mm*3.2) With mounting holes | Φ1.25”(31.8mm)Thickness 1/16”(3.2mm) |
Corrosion Coupon Assembly Selection Model
Модель | ||||||
EMT-CIPA | Access Fitting Body of Corrosion Coupon | |||||
– Материал корпуса приспособления Access Fitting | ||||||
0 | КС | |||||
1 | 316SS | |||||
2 | 316ЛСС | |||||
3 | DUPLEX SS | |||||
Тип корпуса приспособления для доступа | ||||||
B | 2″Welded(suffix “pressure rating” can be added to B) | |||||
F | 2″ANSI Flange(suffix “pressure rating & sealing type” can be added to F) | |||||
-Tee Size- pressure rating & sealing type if the flanged end | ||||||
0 | No Tee | |||||
1 | 1/4″NPT(F)Tee | |||||
2 | 1/2″NPT(F)Tee | |||||
3 | 3/4″NPT(F)Tee | |||||
4 | 1″NPT(F)Tee | |||||
5 | Hole for 1/4″SWN Flange | |||||
6 | Hole for 1/2″SWN Flange | |||||
7 | Hole for 3/4″SWN Flange | |||||
8 | Hole for 1″SWN Flange | |||||
-Тип / материал защитного кожуха | ||||||
0 | Без защитного чехла | Материал | ||||
1 | Without hole | CS или 0 | ||||
2 | With hole | SS или 1 | ||||
3 | Bleed Valve | DSS или 3 | ||||
4 | Bleed Valve, & Pressure Gauge | |||||
For Example, EMT-CIPA-0F600#RF-2-1/CS shows 2″ANSI 600#RF Flange Access Fitting Body in CS, 1/2″NPT(F)Tee, Protective Cover in CS without hole | ||||||
0F600#RF: 0F_ Access Fitting Body is Flanged in CS, 600#RF _Size is 2″ANSI 600#RF, | ||||||
2:Tee size is 1/2NPT(F) | ||||||
1: Protective cover type is without a hole | ||||||
/CS: Protective cove material in CS |
Corrosion can be categorized into three main types:
General Corrosion
General corrosion, commonly known as uniform corrosion, occurs evenly across a large area of a pipeline. This type is the least hazardous because it’s predictable and consistent, making it easier to manage.
Local Corrosion
Local corrosion, also referred to as localized or non-uniform corrosion, poses a greater risk than uniform corrosion. It is more challenging to detect and prevent because it does not occur evenly. Localized corrosion can cause sudden and unexpected damage to metal components, potentially leading to severe accidents, including fires or personal injuries.
Коррозия под напряжением
Stress corrosion cracking happens when metal materials fail due to the combined effects of tensile stress and a corrosive environment. The onset of stress corrosion can vary; some metals may crack within days, while others might take years. This variability indicates that stress corrosion often has a variable incubation period. Typically, stress corrosion cracks develop dendritically, branching out perpendicular to the direction of the tensile stress.
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