We have a pipespec. 1.4571 (316Ti) without a temp. range.
Is it possible to start the spec.with a min. temp of -50 deg C?
Thank You for Your time and effort.
If its B31.3, 316Ti is a non-listed material. You need to use ASME B31.3 323.1.2
Do you need to follow the PED 97/23/EC? Then keep in mind the requirement on notch toughness as per Annex I, "Essential Safety Requirements", para 7.5.
As 316Ti is close to 321 (because of Ti) and 316 (because of higher Cr, Ni, Mo ranges compared to 304), I believe justifying it's use under B31.3 is not that difficult.
However, for low temp applications, I would rather select 304L (or 316L) as they have better properties (lower C-range)
if your using EN 13480 .. good luck ... I dont even want to try and check with that (&^%&*) Code.
If the material is specified in a Harmonized Standard, and there is a reference to the notch toughness of 27J at -50ºC, it is ok for PED and EN 13480. I am not sure the tables in EN 13480-2 are usefull, since you are not using steel.
EN 13480-2 B.2.2.5 Lowest minimum metal temperatures for austenitic stainless steels
X6CrNiMoTi 17-12-2 1.4571 -196ºC.
If everything within this pipe spec is of this material, it can be used for -50ºC without a problem since this material has no transition temperature. The PED Guideline 7/17 also mentions that most Austenitic stainless steels do not have to be notch tested.
europipe,
You have a pipe spec without pressure temperature limits specified??? All I can say is it is a poor spec without the limits to which it is applicable. Employ someone who knows how to write pipe specs next time.
