Qualifying a 6 inch Nom. Sch 120 Tee
Qualifying a 6 inch Nom. Sch 120 Tee
(OP)
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
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





RE: Qualifying a 6 inch Nom. Sch 120 Tee
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!!!
RE: Qualifying a 6 inch Nom. Sch 120 Tee
RE: Qualifying a 6 inch Nom. Sch 120 Tee
Where is this nuclear power plant installation that will be using Chinese piping materials ?
RE: Qualifying a 6 inch Nom. Sch 120 Tee
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"
RE: Qualifying a 6 inch Nom. Sch 120 Tee
You're assuming that safiamoiz is not the purchaser! Other than that, I like the idea of billing for engineering time.
jt
RE: Qualifying a 6 inch Nom. Sch 120 Tee
RE: Qualifying a 6 inch Nom. Sch 120 Tee
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.
RE: Qualifying a 6 inch Nom. Sch 120 Tee
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.
RE: Qualifying a 6 inch Nom. Sch 120 Tee
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
RE: Qualifying a 6 inch Nom. Sch 120 Tee
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!!!
RE: Qualifying a 6 inch Nom. Sch 120 Tee
jt
RE: Qualifying a 6 inch Nom. Sch 120 Tee
RE: Qualifying a 6 inch Nom. Sch 120 Tee
and lists about 5 Countries that I can get in trouble if I mention.