Qualifying a 6 inch Nom. Sch 120 Tee

[safiamoiz]

We have few tees of 6 inch Nom. Sch 120 , seamless, with material ASTM A-234 Grade WPB. It is of Chinese origin. We have a photo copy of Chemical test and Mechanical test.
The tee has embossed heat number and it is same as on test reports.
Can we use this tee for class 1 NB purpose.
Do we need further tests , such as UT, PT, RT and proof test. The manufacturer is untraceable. The report says Specification for Inspection. ASME B 16.9 - 1993
Moiz khan

 

[DSB123]

Safiamoiz,
Probably consider it for use as a flower pot - a few crysanthemums would look nice in them!!! Remember the chinese mills have/will affix any stamp you want!!!

Seriously unless you know the origin of the forging and it is from a reputable mill with acceptable QA procedures - has been witnessed and documented fully then I would not touch them with a preverbial barge-pole.

I see you say they are from an untraceable Manufacturer - doesn't that cover a thousand words such as don't use-don't use-don't use ad infinitum!!!

 

[stanweld]

The short answer is yes you may. But as per comments of DSB123, why would you wish to use it? The fitting's pedegree is dubious from the start; futhermore, a supplier who cannot produce a valid CMTR should be avoided from future purchases. Without knowledge of its manufacturer, don't use it.

 

[MJCronin]

safia,

Where is this nuclear power plant installation that will be using Chinese piping materials ?

 

[Duwe6]

Pick one tee at random and send it out for "Chemical & Physical" per SA-234 testing, at a reputable metallurgical lab. If it passes, and resembles the CMTR you have in-hand, I would use them in Class 3 systems. Would talk to the owner before putting them into Class 2 systems.

Also, take the bill from the metallurgical lab and invoice it to your purchasing department. By buying 'cheap & Chinese', they cost you time, and more money than they saved. And the testing may still come back "Use for flowerpots"

 

[jte]

Duwe-

You're assuming that safiamoiz is not the purchaser! Other than that, I like the idea of billing for engineering time.

jt

 

[MJCronin]

Does everyone understand that piping fabricated, designed installed and inspected to ASME Section III Class NB includes the most important, safety related systems ?

 

[stanweld]

MJCronin,
I, for one, did not; thought he was refering to National Board, possibly for ASME I or B31.1 repairs. Retract the first two sentences of my reply.

OH MY! NukeyLand may be doomed with these type of queries.

 

[Duwe6]

OOPS! I missed the "Class 1" callout.
Answer now becomes simple -- you have flowerpots.

Class 1 components can only be manufactured by *pre-qualified* mfr's. Necessary QA and QC inspections are mandatory *during* the manufacture, while allowing the Purchaser's Inspector(s) full access to the process. Nothing can be qualified "after the fact" without a major NonConformance Report and an approval from the Material Review Board, and concurrence of the Authorized Nuclear Inspector. Not gonna happen for a tee from China.

 

[jte]

Folks-

Let's assume that the plant which sofiamoiz is referring to is NOT in the USA. It is entirely likely that the ASME Code is a guideline, and the entire system built around nuclear power generation in the US does not exist.

Do you suppose that the NRC would be involved to review a major nonconformance report if the tee in question is to be installed in a power plant in North Korea? Or China, Iran, Pakistan, Mexico?

Eng-Tips is a global forum. We in the USA need to be careful to not assume that the questions all relate to something in our own back yard.

jt

 

[DSB123]

Duwe6,
So finally you agree with my flowerpots use of the Tees. That's all they are good for.

Personally I'd get the guy in the Procurement Dept "bagged" for buying these for use on Class 1 system but resisted in saying that in my initial post. This happens too many times when Purchasing Dept's buy the "cheap and cheerful-minimum cost offer" without understanding the consequences and then try and get the Technical guy to justify the use. Problem with engineering Companies - run by bean counters!!!

 

[jte]

I do find it interesting that safiamoiz started this thread, has logged in since the post above (on 24 Dec), but has chosen to neither say "thanks for the discussion" nor to provide any more background which would provide some direction for the discussion...

jt

 

[safiamoiz]

I am reading all the reply very carefully. Thank you very much for the valuable advice provided by the all respectable members. All the answers were very relevant and in the right direction especially that of Duwe6. Best regards.

 

[GenB]

I see it... that why some jobs for power-plants specs say domestic materials only (USA jobs) and other Jobs specifically calls for NO materials from
and lists about 5 Countries that I can get in trouble if I mention.