Hello,
few years ago during an API audit, the Auditor told us that is important to do the marking sequentially as is at point 11.2 of the standard.
Now one client is asking about marking the dimenison in SI and USC.
As i undestand i have to mark:
1- name of manufacture
2- Api Spec 5L(and other...
Hello,
i have a question about the annex relative to Magnetical Particles.
According to API 5L the standards to use are ASTM E709 or ISO 10893-5
ASTM A709--> Has not acceptance criteria
ISO 10893-5 > have 3 levels, M1, M2, M3 and says specifically that the magentical particles (point 6.2) is...
Hello,
i'm studying API 5CT K55 pipes for coulpling stocks, and i have a doubt about marking.
table C.48 On the heat treatment is written Z and N&T.
I suppose N&T is normalizad and tempering, but what about Z? it is Normalized? i can not found the meaning of Z anywhere on the standard.
At...
Hello,
i´m reading some specification for P22 and P11 (ASTM A335) where the client is asking for impact test at -29ºC (for P22)and -36ºC (for P11).
We have carried out some test and it seems to me that these grades are in their limit of the trasnsition curve. I have obtain values less than...
Hello, on last editions of ASTM A335 is include a new grade called P93.
I can see that have Co and Nd (neodimio?)
Anyone knows the use for this new grade? it looks so different from the P91 and P92, so i really don't know what kind of industries needs this new material with Co=2.5-3.5%
Really...
Hello,
For a carbon steel, how elements /structure is the best to obtein a good impact test result at -20 / -40ºC.
We melt a steel with target values aroung C=0.20 Mn=1.50 Si<0.30 V=0.12 after normalizing (ferrite and perlite with a grain size around 9) but the impact test at -20ºC is not more...
Hello,
which is the usual heat treatment for the grade 3?
i'm doing some tests with the samples normalized and tempering, but the impact test values at -101ºC, are quite low (about 5 to 12 j)
Any idea to increase this values? Maybe adding more Nickel to the steel? the Ni on the heat is quite...
Hello,
i'm new in API 5CT so i have some doubts about some points.
Looking at the tables of the annex C(example table c.10) first column is "Label 1" what that means? i suppose it is the OD.
If it is the OD we have to extrapolate the values for other OD not mention there?
And talking about...
Hello, i have to quote K55 D10 according to API 5CT.
I can see the grade K55, but what D10 means? that's on the standard?I can not find it, or Its something to do with welding process? about the AWS D10?
Thank you for your help
Hello,
I'm looking for an EN standard or ISO standard, where terms as "shall" "mandatory" "verify" are defined.
Talking about the EN 10210-1, for some qualities, the impact test shall be verify at the request of the client. So my question is: I have to guarantee IN ANY CASE that the pipes...
hello,
i have to offer some pipes according to ASME SEC.III -NG ED. 1998. The olddest version i have is of 2011.
Any one knows where i can buy it, or if there are a sumary of changes just to confirm that if i use the current one of 2015, i also comply with all the requirements of the one...
Hello everyone, i have a doubt about the maximum pressure at the hydrostatic test.
I'm reading some specifications where in the formule of the hoop stress they talk about the 95% (instead of the 60%)of the minimum yield point and delete the maximum according to the standars: For example
X65 API...
Hello,
any one knows and standard (ASTM-ASME -EN..ETC) where is writing how the straightness have to be measured in a pipe?. According to the standard it has to be 0.0015xlength (1.5mm per metre), I know how to measure it, but i want to know if there are a norm where the method is describe...
hello,
we are trying to manufacturing G8 according to ASTM A333. We have not any experience with this grade, so any help will be appreciated.
I have doubt about the heat treatment. This grade is so similar to the X10Ni9 (EN 10216-4), and in this standars, it says that the heat treatment...
Using the CNB and Cr equivalent/ Ni Equivalent, Any one knows what is the value of those formules to guarantee that there are now ferrite delta on the structure of the P92?
I haver read so many about the P91, but can i use the same limits of the P92?, it has more W, so that increase the results...
Hello everyone,
i have a question. On this standard EN 10210 is says that some steel grades has to be HOT ROLLED. I have a discussion with a client because he says that HOT ROLLED means AS ROLLED CONDITION so i can not do a heat treatment to the pipes, according to the norm.
For me hot rolled...
Hello, I'm talking about hot forming steel tubes.
After the heat treatment at 1060ºc, the grain size is 0-1 or 2. I need grain size between 4-7, so there are any way to solve this problem?
Ususally we have the right grain size, but when the ingots (before forging)stay too much time on the...
hello,
I have a request for a client to do X52 API PSL2 QT for sour service. And the pipes have to pass the HIC and the SSC test. I have read that the minimum S and Cu content are important to have good results.And the calcium treatment for the sulfur globulization.
Any other suggestion? we...
hello, i'm new here, and i'm looking for some information. i need to modified a bit the mechanical properties of the P91, because we have a high yield and tensile points, but the elongation is close to the minimum according to ASTM A 335 20%. We have modified the Tempering temperature to the...
