Description
Main technical parameters of Corrosion Coupon:
- Material: As per MR
- Sealing Material: Fluororubber / Teflon
- Working Temperature: -20~200℃
- Pressure Rating: 150LB, 300LB, 600LB, 900LB, 1500LB
- Size of the nipple , valve and SWN flange (correspond with tee types of the Injection and Sampling Systems): 1/4” 1/2” 3/4” 1”
- Coupon Holder:
Fixed Coupon Holder & Adjustable Coupon Holder are available
Rectangular Coupon Holder : For assembling rectangular coupon
Circular Coupon Holder : For assembling circular coupon
Size of coupon :
3″×1″×1/8″ 2″×1″ ×1/8″
3″×1/2″×1/8″ 2″×1/2″×1/8″
Ф31.8×3.2(1 1/4″×1/8″)
If you have any other questions, please contact our professionals to answer them for you.
Order Information
Access Fitting Body
| Model | ||||||
| EMT-CIPA | Access Fitting Body of Coupon, Injector, Probe assembly | |||||
| – The material of Access Fitting Body | ||||||
| 0 | CS | |||||
| 1 | 316SS | |||||
| 2 | 316LSS | |||||
| 3 | DUPLEX SS | |||||
| The Type of Access Fitting Body | ||||||
| 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 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 | |||||
| -Protective Cover Type/ Material | ||||||
| 0 | No Protective Cover | Material | ||||
| 1 | Without hole | CS or 0 | ||||
| 2 | With hole | SS or 1 | ||||
| 3 | Bleed Valve | DSS or 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 hole /CS: Protective cove material in CS | ||||||
Corrosion Coupons
| Model | |||||||||||||
| CC | Corrosion Coupons | ||||||||||||
| -Code | Plug Body Assembly | ||||||||||||
| Pxxx | Type | Material | Sealing Material | ||||||||||
| 0 | No Request | 0 | CS | 0 | No Request | ||||||||
| 1 | Hollow Plug Body | 1 | 316SS | 1 | Viton O-Ring / PTFE Primary Packing | ||||||||
| 2 | Solid Plug Body | 2 | 316LSS | 2 | HNBR | ||||||||
| 3 | DUPLEX SS | ||||||||||||
| 4 | INCONEL | ||||||||||||
| Type of Coupon Holder | |||||||||||||
| SR | Fixed Coupon Holder for assembling rectangular coupon | ||||||||||||
| AR | Adjustable Coupon Holder for assembling rectangular coupon | ||||||||||||
| LR | Ladder Coupon Holder for assembling rectangular coupon | ||||||||||||
| SC | Fixed Coupon Holder for assembling circular coupon | ||||||||||||
| AC | Adjustable Coupon Holder for assembling circular coupon | ||||||||||||
| -Pipe Size | |||||||||||||
| x | Pipe Size in inch | ||||||||||||
| – Coupon Size | |||||||||||||
| A×B×C | Coupon Size in inch or mm | ||||||||||||
| – Coupon Material | |||||||||||||
| x | Grade | ||||||||||||
| -Finishing of Coupon | |||||||||||||
| 0 | Mill | ||||||||||||
| 1 | Glass Bead | ||||||||||||
| – Isolation Gasket | |||||||||||||
| 0 | No Gasket | ||||||||||||
| 1 | Nylon Gasket | ||||||||||||
| 2 | FTFE Gasket | ||||||||||||
| For Example：CC-P221-SR-6″-3″×1/2″×1/8″-MS1018-0-2 CC: Corrosion Coupons P221: Solid Plug Body in 316LSS Viton O-Ring and PTFE Primary Packing SR-6″:Fixed Coupon Holder for assembling rectangular coupon and for 6″pipe 3″×1/2″×1/8″: Coupon Size MS1018: Coupon Material 0: Finishing of Coupon is Mill 2: Material of Isolation Gasket is PTFE | |||||||||||||
Example for a set of Corrosion Coupons Assembly：
EMT-CIPA-0F600#RF-0-1+ CC-P221-SR-6″-3″×1/2″×1/8″-MS1018-0-2
Sampler & Injector
| Model | |||||||||||||||||||||||||
| SI | Sampler & Injector | ||||||||||||||||||||||||
| -Code | Plug | ||||||||||||||||||||||||
| Pxxx | Type | Material | Sealing Material | ||||||||||||||||||||||
| 0 | No Request | 0 | CS | 0 | No Request | ||||||||||||||||||||
| 1 | Hollow Plug Body | 1 | 316SS | 3 | DSS | 1 | Viton O-Ring / PTFE Primary Packing | ||||||||||||||||||
| 2 | Solid Plug Body | 2 | 316LSS | 4 | INCONEL | 2 | HNBR | ||||||||||||||||||
| – Code | Injection Nut | ||||||||||||||||||||||||
| Nxx | Connection Size | Material | |||||||||||||||||||||||
| 0 | No Request | 0 | CS | ||||||||||||||||||||||
| 1 | 1/4″ | 1 | 316SS | 3 | DSS | ||||||||||||||||||||
| 2 | 1/2″ | 2 | 316LSS | 4 | INCONEL | ||||||||||||||||||||
| – Code | Sampling & Injection Tube | ||||||||||||||||||||||||
| Sxxx-Lx″ | Connection Size | Material | Nozzle | Line size(x″) | |||||||||||||||||||||
| 0 | No Request | 0 | CS | 0 | No Request | The most effective position for injection is generally at the center of the pipe | |||||||||||||||||||
| 1 | 1/4″ | 1 | 316SS | 1 | Open | ||||||||||||||||||||
| 2 | 1/2″ | 2 | 316LSS | 2 | Quill | ||||||||||||||||||||
| 3 | DSS | 3 | Cap & Core | ||||||||||||||||||||||
| 4 | INCONEL | ||||||||||||||||||||||||
| – Code | Type and Size of components connected to Tee and material of components | ||||||||||||||||||||||||
| Txx | Connection Size | Material | |||||||||||||||||||||||
| 0 | No Request | 0 | CS | ||||||||||||||||||||||
| 1 | 1/4″Nipple | a | 1/4″Nipple and Valve | 1 | 316SS | ||||||||||||||||||||
| 2 | 1/2″Nipple | b | 1/2″Nipple and Valve | 2 | 316LSS | ||||||||||||||||||||
| 3 | 3/4″Nipple | c | 3/4″Nipple and Valve | 3 | D SS | ||||||||||||||||||||
| 4 | 1″Nipple | d | 1″Nipple and Valve | 4 | INCONEL | ||||||||||||||||||||
| 5 | 1/4″SWN Flange* | e | 1/4″Nipple and Flange | ||||||||||||||||||||||
| 6 | 1/2″SWN Flange | f | 1/2″Nipple and Flange | ||||||||||||||||||||||
| 7 | 3/4″SWN Flange | g | 3/4″Nipple and Flange | ||||||||||||||||||||||
| 8 | 1″SWN Flange | h | 1″Nipple and Flange | ||||||||||||||||||||||
| For Example：SI-P221-N12-S122-L4″-T22 SI：Sampling & Injection Assembly，P221: Solid Plug Body in 316LSS Viton O-Ring and PTFE Primary Packing，N12：Injection Nut Connection Size is 1/4″and Material is 316LSS，S122：Injection Tube Connection Size is 1/4″ and Material is 316LSS.Type of nozzle is quill，L4″：For 4″pipe. T22: Connection Size of Nipple connected to Tee is 1/2″NPT(M), Nipple material is 316LSS | |||||||||||||||||||||||||
Note: SWN Flange is special WN Flange
Example for a set of Sampler & Injector Assembly:
EMT-CIPA-0F600#RF-2-1+ SI-P221-N12-S122-L4″-T22
Use of Corrosion Coupon
The corrosion coupon is usually in the test vessel or on the heat exchanger or test pipe on site. It is a metal test piece that can be used to determine corrosion. At the same time, it can also monitor or evaluate the corrosion of cooling water system.
Use and nature of corrosion coupon
We need to prepare the metal test piece in advance. Then we weigh it and put it into the test system for a period of time (such as 30 ~ 90 days). Then take it out and observe the corrosion. Clean it and get the weight. So in this way, the user can determine the weight loss degree of metal corrosion. (in mils / year or mm / year, 1mpy=0.0254mm/a). In addition, we can also know the type of corrosion and pitting depth. The data of the metal coupon is not only affected by the corrosive medium. It is also related to the surface treatment of the coupon, the placement position, the length of exposure time and the metallurgical method of the coupon.
There are many kinds of standard corrosion test pieces for water treatment. For example, corrosion coupon, cooling water treatment standard corrosion coupon, corrosion coupon, etc. The materials are A3 carbon steel test piece, 20# carbon steel test piece, stainless steel test piece and brass test piece. There are also red copper test pieces, aluminum test pieces, cast iron test pieces, etc
Storage and use of corrosion coupon
- First, the operator wipes the standard corrosion coupon (corrosion coupon) in distilled water. They wash with water for another 15 seconds;
- Second, they scrubbed the standard corrosion test piece twice with absorbent cotton in chemically pure absolute ethanol (50ml/ 10 pieces);
- Then, they need to put the standard corrosion test piece on the dry filter paper. Then dry with cold air;
- The tester wraps the standard corrosion coupon (corrosion coupon) with filter paper. Then place it in the dryer. Weigh for use after 24 hours;
- The originally packaged test piece shall be placed at a place free of corrosive gas. (moisture proof storage);
- Finally, the unsealed but unused standard corrosion test pieces are still placed in the antirust paper. Then put it in a dryer.
New hanging piece treatment (sealed packaging)
- First, the operator needs to immerse the new coupon in absolute ethanol. Then wipe twice with absorbent cotton;
- Then, they moved the coupon into clean absolute ethanol and soaked it for a moment;
- Then put the hanging piece on the clean filter paper and dry it with cold air;
- Wrap it with filter paper and place it in a dryer. Weigh for use after 24 hours (weigh to the nearest 0.1g).
Treatment method of post hanging piece
- First, we will carefully take out the used hanging piece. At this time, the operator needs to observe and record the surface condition before handling;
- If the corrosion deposition is not obvious, we wipe it with a drawing eraser. This makes it show the true color of metal. Then immerse it in absolute ethanol and scrub it twice with absorbent cotton. Immerse in clean absolute ethanol for a moment. Then take them out, put them on clean filter paper, and dry them with cold air. Wrap it with filter paper and put it in the dryer. Weigh after 24 hours (weigh accurately to 0.1g), get the lost weight, and then calculate the corrosion rate;
- For the coupon with more corrosive deposits, we should first remove the corrosion products by chemical cleaning.
Corrosion rate calculation formula
Corrosion rate =87.6 △ w/ (s) ρ t） mm/a
△ W – weight loss of test piece, Mg;
S – total surface area of test piece, cm2;
ρ— Density of metal, g/cm3 (carbon steel 7.85, brass 8.50);
T – experimental time, h;
A (DM2): area of coupon
Type I ——0.28 DM2 =28cm2
Type II ——0.20 dm2=20 cm2
