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Monday, December 5, 2016

[MW:25795] Aluminium Panel of Dome Roof

Hi everyone,


Why API   650 specifically  require one-sheet aluminium panel ? What if used welded paneĊŸ with qualified PQR and NDE tests.


Regards

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[MW:25795] For Cryogenic Services at Temp -196 degree Celsius (17 Kelvin) Pipe of ASTM 312 TP 304 L is suitable?

Dear Experts,

Currently I am working on a project of ISRO (Indian Space Research Organisation) for Integrated Cryogenic Engine Testing Facility (ICET), for bidding in that services are Liquid Hydrogen, Liquid Oxygen, Liquid Helium, Liquid Nitrogen, Gaseous Hydrogen, Gaseous Oxygen, Gaseous Nitrogen, Gaseous Helium.

For SS Seamless Pipes client has given three options for material ASTM 312 TP 304L/ ASTM 312TP 316L/ ASTM 312TP 321. 

Kindly suggest me the suitable material for the same that gives economical and best design.


Thanks in advance.


Regards:-

Vivek Singh Chaudhary

Piping Design Engineer.

Contact No.- +91 9990441755.

Email :- viveksinghme1612@gmail.com



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Re: [MW:25795] Placement of Insulating Joint in pipeline changing medium from soil to air

Dear Sir/Madam,

IJ shall be installed on above ground. The basic principal for using the IJ is - 

1) In under ground pipeline for PCP system the input voltage 220 V current. But in above ground , all the instrument are operate in mili volt. The main function of IJ is protect the voltage form under ground to above ground. Its act as a resistance.

2) The sparkarestor are installed with IJ. So it should be installed at above ground.

On Sun, Dec 4, 2016 at 7:14 PM, Ghanshyam Shukla <gsshukla5@gmail.com> wrote:
what is the advisable position for installing the same?  

Both , it depends project requirement

 Should IJs be installed aboveground ?

Yes , Painting Class will changed

same is buried below ground?

Yes , Painting Class will changed

Also our current practise is we provide Cathodic protection to the underground portion and the portion above the IJ is ideally protected by painting ?

Your understanding is correct.


Also thickness of IJ Also consider.

Whether you consider ?

ghanshaym shukla

966543763514

On Tue, Nov 22, 2016 at 9:31 AM, Mahanagar Gas <sneha.duraisamy@gmail.com> wrote:

This is with reference to Insulating Joint being installed on Steel pipelines to isolate the aboveground section from the underground section. I needed to know what is the advisable position for installing the same? Should IJs be installed aboveground or is it OK if the same is buried below ground? Also our current practise is we provide Cathodic protection to the underground portion and the portion above the IJ is ideally protected by painting. In some cases the portion above the buried IJ is also coated till the point it comes aboveground. Please provide me with suggestion / recommendations regarding the same.

 

For some IJs we have started exposing the IJs and keeping it exposed in a chamber & filling it with sand. Is this a viable solution? Please advise

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Best Regards,

Joydev Dalai
Dy. Manager - QA/QC
+91-7260898902
JHPL Project,
Kalpataru Power Transmission ltd.

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RES: [MW:25794] High strength material and Low strength Material

You can use as reference AWS D1.1:

 

·         mild steel (yield strength up to 36 ksi [250 MPa])

·         medium-strength steel (yield strength between 36 ksi and 65 ksi [250 MPa and 450 MPa])

·         high-strength steel (yield strength between 65 ksi and 115 ksi [450 MPa and800 MPa])

 

 

De: PUB:'Mohamed ali' via Materials & Welding [mailto:materials-welding@googlegroups.com]
Enviada em: domingo, 4 de dezembro de 2016 12:24
Para: materials-welding@googlegroups.com
Assunto: [MW:25792] High strength material and Low strength Material

 

Dear Experts, 

 

How to classify High strength material and Low strength material, because our client says SA 36 and S 275 JR are high strength material, we have to prove that both of the materials are Low strength material.

 

If Low strength material - 2.2 certification enough.

 

please ...

 


 
Thanks & Regards,
 
M A Samsudeen

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Sunday, December 4, 2016

[MW:25792] High strength material and Low strength Material

Dear Experts, 

How to classify High strength material and Low strength material, because our client says SA 36 and S 275 JR are high strength material, we have to prove that both of the materials are Low strength material.

If Low strength material - 2.2 certification enough.

please ...
 

 
Thanks & Regards,
 
M A Samsudeen

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