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.
Modèle de sélection
Modèle | |||||||||||||
CC | Corrosion Coupons | ||||||||||||
-Code | Assemblage du corps de la prise | ||||||||||||
Pxxx | Type | Matériel | Scellement Matériel | ||||||||||
0 | Aucune demande | 0 | CS | 0 | Aucune demande | ||||||||
1 | Creux Corps de la prise | 1 | 316SS | 1 | Joint torique Viton / Garniture primaire en PTFE | ||||||||
2 | Corps de prise solide | 2 | 316LSS | 2 | HNBR | ||||||||
3 | DUPLEX SS | ||||||||||||
4 | INCONEL | ||||||||||||
Type de Détenteur du coupon | |||||||||||||
SR | Fixe Détenteur du coupon pour l’assemblage de coupon | ||||||||||||
AR | Réglable Détenteur du coupon pour l’assemblage de coupon | ||||||||||||
LR | Porte-coupon d’échelle pour l’assemblage de coupons rectangulaires | ||||||||||||
SC | Fixe Détenteur du coupon pour l’assemblage circulaire coupon | ||||||||||||
Courant alternatif | Réglable Détenteur du coupon pour l’assemblage circulaire coupon | ||||||||||||
-Taille du tuyau | |||||||||||||
x | Taille du tuyau en pouce | ||||||||||||
– Coupon Taille | |||||||||||||
A×B×C | Coupon Taille en pouce ou mm | ||||||||||||
– Matériel du coupon | |||||||||||||
x | Grade | ||||||||||||
-Finition de Coupon | |||||||||||||
0 | Moulin | ||||||||||||
1 | Perle de verre | ||||||||||||
– Joint d’isolation | |||||||||||||
0 | Pas de joint d’étanchéité | ||||||||||||
1 | Joint en nylon | ||||||||||||
2 | Joint en PTFE | ||||||||||||
Par exemple CC-P221-SR-6 »-3"×1/2"×1/8 »-MS1018-0-2 CC : Coupon de corrosion | |||||||||||||
P221 : Corps de connecteur solide en joint torique Viton 316LSS et garniture primaire en PTFE | |||||||||||||
SR-6 » :Porte-coupon fixe pour l’assemblage de coupons rectangulaires et pour tuyau de 6 » | |||||||||||||
3"×1/2"×1/8 » : Coupon Taille MS1018 : Matériel du coupon | |||||||||||||
0: Finition de Le coupon est Mill 2 : Le matériau du joint d’isolation est en PTFE |
Corrosion Coupon Types (Corrosion Coupon Assembly)
Nom | Coupon de dénudage | Multihole Strip Coupon | Coupon de disque |
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. |
Taille | 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
Modèle | ||||||
EMT-CIPA | Accéder au corps du raccord du coupon de corrosion | |||||
– Le matériau du corps de raccord d’accès | ||||||
0 | CS | |||||
1 | 316SS | |||||
2 | 316LSS | |||||
3 | DUPLEX SS | |||||
Le type de corps de raccord d’accès | ||||||
B | 2"Soudé(le suffixe « pression nominale » peut être ajouté à 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 | Pas de tee | |||||
1 | 1/4 "NPT(F) Té | |||||
2 | 1/2 "NPT(F)Té | |||||
3 | 3/4"NPT(F)Té | |||||
4 | 1"NPT(F)Tee | |||||
5 | Trou pour bride 1/4"SWN | |||||
6 | Trou pour bride 1/2"SWN | |||||
7 | Trou pour bride 3/4"SWN | |||||
8 | Trou pour bride 1"SWN | |||||
-Type/Matériau de la housse de protection | ||||||
0 | Pas de housse de protection | Matériel | ||||
1 | Sans trou | CS ou 0 | ||||
2 | Avec trou | SS ou 1 | ||||
3 | Soupape de purge | DSS ou 3 | ||||
4 | Bleed Valve, & Pressure Gauge | |||||
Par exemple, EMT-CIPA-0F600#RF-2-1/CS affiche le corps de raccord d’accès à bride 2"ANSI 600#RF en CS, 1/2 » NPT(F)Tee, le couvercle de protection en CS sans trou | ||||||
0F600 # RF : 0F_ corps de raccord d’accès est bridé en CS, 600 # RF _Size est de 2 "ANSI 600 # RF, | ||||||
2 : La taille du té est de 1/2NPT (F) | ||||||
1 : Le type de couverture de protection est sans trou | ||||||
/CS : Matériau de protection en 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.
Stress Corrosion
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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