What is the pipe material?

[curtis2004]

Hi Everyone,

I am working in a Thermal Oil system piping retrofit project in a Sawmill. The original system was installed in 1987. There is no documentation whatsoever available at this point. None! I'm collecting some data from equipment nameplates and come across this pipe with original stensill mark.
It looks like this particular pipe has diameter of 6.625 (6" nominal) and wall thickness of 7.1 mm ( 6" x Schedule 30). However, what is X818128, 87-55, or NNC16 means? See attached picture.

Thanks,
Curtis

 

[Metalero]

X818128 looks like Serial or heat number. Try to search about it whith manufacturer StelPipe (note: Don't says STEEL, it says STEL).
A little google search says me that could be mechanical tube or API 5L Gr. B.

 

[curtis2004]

Hi MarriolaV,

There is another picture of different spool. It could be API 5L Grade B/X42 indeed. It could be also CSA Z245.1 Grade 290.
What do you think?

Thanks,
Curtis

 

[Metalero]

I agree, CSA Z245.1 is the Canadian equivalent of API 5L, and Gr 290 means 290MPa SMYS = API 5L X42 where the SMYS is 42ksi (290MPa).

 

[LittleInch]

marriola V calls it good.

The basic data is there now the second bit has been revealed, the other numbers are the vendors markings which meant something at the time.

NNC could be anything (no coating maybe?)
87-55 would appear to refer tot he year and possibly the batch number that year.
It's ERW pipe manufacture.
Looks in quite good condition, at least externally.

Keeping it in place and modifying is one thing, but re-use might be problematic without material certificates.

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

 

[Gator]

Stelco:

https://www.stelco.com/