Centrifugal Casting 1

[nickypaliwal]

What are the methods of pipe manufacturing used in Oil and Gas ??

As far as I have observed, I have seen welded pipes, forged pipes.... Also I have read about extruded pipes however do we use Cast pipes in industry ??

Also can Centrifugal casting give uniform composition throughout the material ?

 

[metengr]

Review ASTM A 426 or ASME SA 426; SPECIFICATION FOR CENTRIFUGALLY CAST
FERRITIC ALLOY STEEL PIPE FOR HIGHTEMPERATURE
SERVICE

 

[arunmrao]

High temperature pipes are cast in various heat resistant alloys. HK40 and HP alloys are commonly used. I am providing one link below for your reference.

http://www.nickelinstitute.org/~/Me.../RepairWeldingHighAlloyFurnaceTubes_10031.pdf

I'm just one step away from being rich, all I need now is money.
( read somewhere on the internet)

 

[EdStainless]

Typically welded pipe is used at lower temperatures (below creep) and at large sizes.
Seamless is typically used for heavy walls, and high temps.
The only applications of cast that I know of are for furnace tubes operating at very high temperatures.

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Plymouth Tube

 

[XL83NL]

Typical applications can be found in ATRs and SMRs, where pressure and temperatures are beyond any code jurisdiction (in excess of 1000 deg C at pressure).
There's an API code covering pressure design for such (furnace) tubes, just dont know its number atm. Company specs, e.g. Shell DEPs, also cover these materials for specific applications.

 

[blacksmith37]

Try reading specifications : like API 5L and 5 CT.

 

[nickypaliwal]

Thanks to all of you ..... As specified for very high temperatures.... Is cast pipe used in Upstream facility ??

Also which shell spec talks about cast pipes ??

 

[EdStainless]

Such as for furnace tubes in ethylene cracker furnaces (externally fired, low pressures).
The cast high Ni alloys have good creep strength, but no ductility.
You must design carefully.

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Plymouth Tube

 

[FennLane]

HK40 - very interesting alloy and was developed for use in Steam Reformers as it acted as a catalyst due to the high Nickel content.

I looked at the influence of Thermal Cycling on the Fracture Toughness of HK40 for my undergraduate project more years ago than I care to admit and it was carrying out the KiC tests and the background reading that led to an interest in Fracture Mechanics and my subsequent Ph.D work.

I have never seen this alloy referred to since that time - takes you back.......

 

[XL83NL]

Shell DEP 31.24.40.31

 

[nickypaliwal]

Thanks everybody !!