A333 GR 6 VS A333 GR 10

[chiru123pc]

Dear All,
project requirement is A333 gr 6, but readily available based on the chemical analysis report is A333 Gr 10. Can we use this?

Experts share your opinions

 

[XL83NL]

Give me a reaosn why you think you could use it.

Then try to give 2 reasons why you should refuse it.

 

[GD2]

In terms of suitability A333 Gr. 10 could be better than Gr.6 but check on the cost.
Gr. 10 has higher strength (SMYS 65 ksi Vs 35 ksi), can be used upto -75F instead of -50F for Gr.6.
Because of it's higher strength, you also need to do your due diligence in checking the WPS - Girth welds and pipe to piping components welds, heat treatment requirement etc.

I am not sure what construction code you will follow. To ASME B31.3, A333 Gr. 10 is NOT a listed material. You will, therefore, need to qualify it by the rule of para 323.1.2

GDD
Canada

 

[XL83NL]

GDD, such posts should be handled with care in terms of answers, imo.

users like chiru may assume this site is run by experienced, retired consultant from (amongst others) the oil&gas industry who all day to give all their knowledge in terms of consultancy - for free. but we should not. given the question posted, it seems the OP has little understanding on this topic.

giving him advice, whatever it is, may be even dangerous, as he may not be able to interpret the answer, and we have too little understanding of the total picture or background. there's a real change of mismatch.

 

[LittleInch]

chiru,

Insulting long term posters is never normally a good idea and won't help you get answers to your questions.

However a single line question isn't a good start either as it tells us nothing about your role, experience or why you think something is a good idea or not or what you've found out about the issue.

A333 Gr 6 is a well known material used for low temperature pipe conditions. I don't see why it is not available.

I don't understand the chemical analysis report bit - is the analysis of the pipe? If it's a different grade then it will be different.

Grade 10 will not be the same material as grade 6. These differences could be significant or maybe not. We don't know what your process requirements are so can't say.
No one here can tell you it's ok to use it or not. We can only advise and ask questions.
With A333 gr 10 not being listed in B31.3 you have a significant issue to resolve.

You really need access to a materials engineer to resolve this issue.

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

 

[chiru123pc]

Thank you little inch..in your answer I can see your professionalism. But how the guy i don't want to mention his name again. He should learn. Everyone are experienced in their field. When a question comes as challenging which is beyond the standard obviously we take suggestions from professionals like you.

It is not just like i need answers for free cost...

 

[weldstan]

chiru,
You don't specify the Code of Construction or the service conditions so how do you expect to obtain a cogent response to your query?