API 5L 46th Ed. Rejection of Line Pipe due to chemistry
API 5L 46th Ed. Rejection of Line Pipe due to chemistry
(OP)
API 5L X52 PSL 2 30" O.D. X .875 wall
Permissable Mn is 1.65% MAX page 30 Table 5 (b)
MTR has Ladle and product Analysis
Ladle Mn 1.66
Product 1 1.60
product 2 1.60
Customer is rejecting due to the fact that the reported Ladle analysis is Mn 1.66%.
API clearly states in the very top of API Table 5 " Mass Fraction, Based on Heat and Product Analyses " Yet MTR does not specifically give a heat analyis.
API says nothing in regards to ladle analysis.
Just want to be certain that when it comes to API 5L that Product analysis overrides ladle?
As always thanx for everyone's input up front!
-=Fred=-
Vass Pipe
Vass Pipe API Line Pipe Industry Leader "
Just want to be certain that when it comes to API 5L that Product analysis overrides ladle?
As always thanx for everyone's input up front!
-=Fred=-
Vass Pipe
Vass Pipe API Line Pipe Industry Leader
Permissable Mn is 1.65% MAX page 30 Table 5 (b)
MTR has Ladle and product Analysis
Ladle Mn 1.66
Product 1 1.60
product 2 1.60
Customer is rejecting due to the fact that the reported Ladle analysis is Mn 1.66%.
API clearly states in the very top of API Table 5 " Mass Fraction, Based on Heat and Product Analyses " Yet MTR does not specifically give a heat analyis.
API says nothing in regards to ladle analysis.
Just want to be certain that when it comes to API 5L that Product analysis overrides ladle?
As always thanx for everyone's input up front!
-=Fred=-
Vass Pipe
Vass Pipe API Line Pipe Industry Leader "
Just want to be certain that when it comes to API 5L that Product analysis overrides ladle?
As always thanx for everyone's input up front!
-=Fred=-
Vass Pipe
Vass Pipe API Line Pipe Industry Leader
Vass Pipe API Line Pipe Industry Leader
RE: API 5L 46th Ed. Rejection of Line Pipe due to chemistry
I guess if someone wants to be didactic they can reject this.
But given that there are multiple product checks and they are within spec (not even having to use the additional tolerance) I think that they are overreacting.
If it were me I might demand a few more product checks.
Were the ones take from the first and last slabs of the heat? Or don't they say?
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P.E. Metallurgy
RE: API 5L 46th Ed. Rejection of Line Pipe due to chemistry
I went to the mill and asked them directly if in API product supercedes ladle and they were very vague. They finally responded positively yet the
customer is still questioning.
The mill has certified the material to API 5L X52 But the customer keeps requesting justification as to their findings.
Me to customer :
Subject: FW: FW: FW: I have a rejection and have a simple question to put forth...
Good morning,
I am pleased to report that the mill HAS confirmed (see below) that product over rides ladle in API 5L analysis.
In speaking to the mill it seems that Table 5 clearly states and makes no reference to Ladle at the top, Heat and Product is the qualifying criteria:
Kindest regards,
Fred
Manager
Vass Pipe
Mill comment:
Fred,
QA:
API requirements for chemical composition is based on heat and product analyses not ladle.
Thank you,
Vickie
Customer response to above:
Fred,
If ladle and heat are not synonymous, and heat AND product are both qualifying criteria, where is the heat analysis on chemistry on this MTR?
Corporate Purchasing Manager
*** Fabrication, Inc.
This is a major fabricator building an oil platform going out internationally
I have attached the MTR for your perusal
Thanx for the quick response
Vass Pipe API Line Pipe Industry Leader
RE: API 5L 46th Ed. Rejection of Line Pipe due to chemistry
RE: API 5L 46th Ed. Rejection of Line Pipe due to chemistry
I'm still needing to know is API 5L based uopn Ladle or Product/heat.
-=Fred=-
Vass Pipe API Line Pipe Industry Leader
RE: API 5L 46th Ed. Rejection of Line Pipe due to chemistry
In API 5L there is no tolerance, so it is up to the steel manufacturer to choose a chemical composition with a Mn-content sufficently low to respect the maximum value as well on heat as on product analysis.
2) The terms "heat analysis", "ladle analysis", "cast analysis" are equivalent. The sample is taken in molten steel. In modern steel mills, the sample is taken in the mould (or the tundish) during casting , so just before solidication, and therefore the difference between heat and product analysis should be minimal.
3) As the deviation to the standard is small, I would ask a concession request to the customer. If the customer declines, I would send back the material to the mill.
RE: API 5L 46th Ed. Rejection of Line Pipe due to chemistry
Is 'ladle analysis' included in various standards just a hangover from the distant past? Seems to me it is just a part of 'making the sausage'.
"Everyone is entitled to their own opinions, but they are not entitled to their own facts."
RE: API 5L 46th Ed. Rejection of Line Pipe due to chemistry
We used to require both, and they both had to meet the spec (no additional tol on the product chem) as we were going to have to analyze our product after mfg and we wanted to have the tol to use.
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P.E. Metallurgy
RE: API 5L 46th Ed. Rejection of Line Pipe due to chemistry
Thanx everyone for your help and input.
-=Fred=-
Vass Pipe API Line Pipe Industry Leader