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Technical Discussions
ali abrar
ali abrar
01:54 Dec-20-2003
Corrosion protection of gas pipe line

We have 16 in. Natural gas pipeline, burried and protected cathodically. This is 15 Km long with three overhead crossings on canals. Due to expansion of one of the canal, some portion of the line is now in contact with the canal water.
The line is coated and wrapped with protective tapes for underground applications.

What can be done to ensure protection of the line now in contact with water?



    
 
 Reply 
 
Prashant Biswal
Prashant Biswal
08:46 Dec-21-2003
Re: Corrosion protection of gas pipe line
You may check at http://www.caltechindia.com for exact solution or contact at caltech@vsnl.net

----------- Start Original Message -----------
: We have 16 in. Natural gas pipeline, burried and protected cathodically. This is 15 Km long with three overhead crossings on canals. Due to expansion of one of the canal, some portion of the line is now in contact with the canal water.
: The line is coated and wrapped with protective tapes for underground applications.
: What can be done to ensure protection of the line now in contact with water?
------------ End Original Message ------------




    
 
 Reply 
 
Joel A. Light
Consultant, Corrosion Prevention
Deepwater Corrosion Services Inc., USA, Joined Jul 2002, 12

Joel A. Light

Consultant, Corrosion Prevention
Deepwater Corrosion Services Inc.,
USA,
Joined Jul 2002
12
06:13 Dec-22-2003
Re: Corrosion protection of gas pipe line
----------- Start Original Message -----------
: We have 16 in. Natural gas pipeline, burried and protected cathodically. This is 15 Km long with three overhead crossings on canals. Due to expansion of one of the canal, some portion of the line is now in contact with the canal water.
: The line is coated and wrapped with protective tapes for underground applications.
: What can be done to ensure protection of the line now in contact with water?
------------ End Original Message ------------

If the existing cathodic protection system is adequate, it should easily protect the portion of pipeline in the water as water is less resistive than soil. However, you might consider installing a permanent reference electrode in this location for occasional measurement.
I believe however that the biggest risk will likely be possible crevice corrosion at the tape to paint interface.
A very diligent visual inspection procedure should be established to insure the exterior of the pipeline remains corrosion free.
Please feel free to email me directly if you have any other questions.




    
 
 Reply 
 
Ratan Kumar Saha
Ratan Kumar Saha
03:45 Jun-01-2004
Corrosion protection of gas pipe line
What could be the possible corrosion protection for a burried oil/gas pipeline running 2 miles at 70C? Would the protection be different for highly acidic and highly alkaline soil?


    
 
 Reply 
 
Floyd Atkinson
NDT Inspector
American Inspection Society, Inc., USA, Joined Jun 2004, 10

Floyd Atkinson

NDT Inspector
American Inspection Society, Inc.,
USA,
Joined Jun 2004
10
03:57 Jun-05-2004
Re: Corrosion protection of gas pipe line
----------- Start Original Message -----------
: : We have 16 in. Natural gas pipeline, burried and protected cathodically. This is 15 Km long with three overhead crossings on canals. Due to expansion of one of the canal, some portion of the line is now in contact with the canal water.
: : The line is coated and wrapped with protective tapes for underground applications.
: : What can be done to ensure protection of the line now in contact with water?
: If the existing cathodic protection system is adequate, it should easily protect the portion of pipeline in the water as water is less resistive than soil. However, you might consider installing a permanent reference electrode in this location for occasional measurement.
: I believe however that the biggest risk will likely be possible crevice corrosion at the tape to paint interface.
: A very diligent visual inspection procedure should be established to insure the exterior of the pipeline remains corrosion free.
: Please feel free to email me directly if you have any other questions.
------------ End Original Message ------------
I feel that the previous information is very valuable. I would like to add that the interface tape to paint could be interrupted by abrasive debris which may flow through the canal to the low ends of the pipeilne arches. Perhaps a debris interupter along the canal would be helpful to aleviate this potential problem before it starts.The ph / acidity of the flowing water is essential as an interupter to cathodic annodes. Since you work for a fertilizer company, beware I presume it could be a factor.


    
 
 Reply 
 
Raymond KWONG
Raymond KWONG
04:09 Mar-22-2006
Re: Corrosion protection of gas pipe line
----------- Start Original Message -----------
: : : We have 16 in. Natural pipeline, burried and protected cathodically. This is 1200mm diameter long.
: : : The line is coated and wrapped with protective tapes for underground applications.
: : : What can be done to ensure protection of the pipeline now in contact with water?
: : : We need to according B.S. 7361:Part 1:1991 (british Standard)
: : : Please send me the e-mail, We need the detail information and the product price Thanks!



    
 
 Reply 
 
M. H. Rahman
M. H. Rahman
08:27 Mar-03-2007
Re: Supply delivery for API 5L, Grade-B, ERW Pipe
To :
Attn. : Director Sales
From : Arenco Trade Ltd.
Re : Mutual Cooperation

We write to introduce Arenco Trade Ltd as the parent Company (est. 1974) of the Arenco Group engaged in multi sectoral business activities. Backed by people professional expertise and varied experience, Arenco Trade Ltd. is one of the few most successful enterprises in the country that have earned a rare distinction in selling machinery, materials and services to both industrial and infra-structural development projects as local associates of highly reputed Companies from different parts of the world.

In the backdrop of our varied business experience vis-a-vis consistently pursued policy of steady expansion, we wish to offer you own cooperation and services in pursuing the growing business prospects in this market.

To begin with, we draw your attention to and invite your participation through our Company international tenders floated by Gas Transmission Company Limited (GTCL) and Pashchimanchal Gas Company Limited(PGCL) both are fully Govt-owned organization, for –

1) Supply and delivery of the API 5LX60, LSAW 30” OD Corrosion Coated Line Pipes, API 5LX60, LSAW 30” OD Corrosion Coated along with Concrete Coated and Weighted (CCW) Line Pipes, API 5LX60 ERW Smaller dia station pipes, API 5L Grade B 36” OD LSAW Casing Pipes for the Construction of 762mm OD (30”) 51.00 Km high pressure (1135 psig) Natural Gas Transmission Pipeline.

Tender closing date is March 12, 2007. The project is being financed by the Asian Development Bank (ADB).

2) Supply & delivery for API 5L, Grade-B, ERW Pipe,

Tender closing date is April 25, 2007. The project is being financed by the Asian Development Bank (ADB).

In view of our long business experience in projects of varied nature, we seek and invite your participation in the Bid using our Company as your local agent / associate.

Awaiting your favourable response, which will hopefully mark the beginning of a mutually beneficial cooperation between our two Companies.

M H Rahman
Chairman & CEO

Arenco Trade Ltd.
Building # 36, Road # 122,
Gulshan-1, Dhaka-1212,
Bangladesh.

Phone #: 880-2-9893637-8, 8832897-8
Fax # : 880-2-8854466, 8819759
e-mail : arenco@bijoy.net / arenco@sparkbd.net / arenco@bangla.net
Website : www.arencobangladesh.com



    
 
 Reply 
 
M. H. Rahman
M. H. Rahman
08:28 Mar-03-2007
Re: Supply delivery for API 5L, Grade-B, ERW Pipe
We write to introduce Arenco Trade Ltd as the parent Company (est. 1974) of the Arenco Group engaged in multi sectoral business activities. Backed by people professional expertise and varied experience, Arenco Trade Ltd. is one of the few most successful enterprises in the country that have earned a rare distinction in selling machinery, materials and services to both industrial and infra-structural development projects as local associates of highly reputed Companies from different parts of the world.

In the backdrop of our varied business experience vis-a-vis consistently pursued policy of steady expansion, we wish to offer you own cooperation and services in pursuing the growing business prospects in this market.

To begin with, we draw your attention to and invite your participation through our Company international tenders floated by Gas Transmission Company Limited (GTCL) and Pashchimanchal Gas Company Limited (PGCL) both are fully Govt-owned organization, for –

1) Supply and delivery of the API 5LX60, LSAW 30” OD Corrosion Coated Line Pipes, API 5LX60, LSAW 30” OD Corrosion Coated along with Concrete Coated and Weighted (CCW) Line Pipes, API 5LX60 ERW Smaller dia station pipes, API 5L Grade B 36” OD LSAW Casing Pipes for the Construction of 762mm OD (30”) 51.00 Km high pressure (1135 psig) Natural Gas Transmission Pipeline.

Tender closing date is March 12, 2007. The project is being financed by the Asian Development Bank (ADB).

2) Supply & delivery for API 5L, Grade-B, ERW Pipe,

Tender closing date is April 25, 2007. The project is being financed by the Asian Development Bank (ADB).

In view of our long business experience in projects of varied nature, we seek and invite your participation in the Bid using our Company as your local agent / associate.

Awaiting your favourable response, which will hopefully mark the beginning of a mutually beneficial cooperation between our two Companies.

M H Rahman
Chairman & CEO

Arenco Trade Ltd.
Building # 36, Road # 122,
Gulshan-1, Dhaka-1212,
Bangladesh.

Phone #: 880-2-9893637-8, 8832897-8
Fax # : 880-2-8854466, 8819759
e-mail : arenco@bijoy.net / arenco@sparkbd.net / arenco@bangla.net
Website : www.arencobangladesh.com



    
 
 Reply 
 

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