API 5L plate?
API 5L plate?
(OP)
What does it mean to order or roll plate to API 5L Gr. X65? It's a pipe spec. Does it mean following everything except the welding and dimensional requirements? I would have thought there would be a separate plate spec and then the pipe spec would specify that plate.
Also I can't find in 5L anything about metallurgical process, whether the steel is killed, etc., or whether it is Q&T. Am I missing it? Is it not there? Is it somewhere else?
Hg
Also I can't find in 5L anything about metallurgical process, whether the steel is killed, etc., or whether it is Q&T. Am I missing it? Is it not there? Is it somewhere else?
Hg
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RE: API 5L plate?
- dimensional tolerances for the plates
- restricted chemical composition adjusted to the planned welding conditions
- modified minimum values for mechanical properties to take into account the modifications caused by cold forming to pipes, eventually followed by expanding.
- test requirements (mechanical, NDT)
There are no specific standards for the delivery of plate material as starting material for pipe production.
A lot of metallurgical processes are defined in new 2007 edition of API-5L.
RE: API 5L plate?
Hg
Eng-Tips policies: FAQ731-376: Eng-Tips.com Forum Policies
RE: API 5L plate?
Intended application?
RE: API 5L plate?
I'll go by the individual MTRs if I have to, but if it's a lot of plates (I don't know yet), that could get tedious as compared to just basing the decision on the material spec.
Hg
Eng-Tips policies: FAQ731-376: Eng-Tips.com Forum Policies
RE: API 5L plate?
1) Elongation: In API 5L, elongation may be measured either on rectangular or on round tension test specimen. If a rectangular specimen is used, this specimen must be 1.5 inch wide, but gauge length is 2 inches. This gives rather high values ( > 30%), but is not in accordance of ASTM A709.
2) X65 may be delivered as PSL1 without impact requirements
3) Mn may be up to 1.75% (ed. 2007) resp. 1.65% (ed.2004), not allowed in A 709-50 (max. 1.60)
4) Testing frequency may not match the requirements of A 709