UNLIMITED FREE ACCESS TO THE WORLD'S BEST IDEAS

close
Already an Engineering360 user? Log in.

This is embarrasing...

An error occurred while processing the form. Please try again in a few minutes.

Customize Your Engineering360 Experience

close
Privacy Policy

This is embarrasing...

An error occurred while processing the form. Please try again in a few minutes.

DNVGL-RP-F110

Global buckling of submarine pipelines due to high temperature/high pressure

inactive
Buy Now
Organization: DNVGL
Publication Date: 1 August 2017
Status: inactive
Page Count: 91
scope:

Scope and application

This recommended practice applies to structural design of rigid pipelines with a potential to buckle globally. This normally implies so called HP/HT pipelines but also moderately tempered pipelines may be of relevance depending on the global buckling resistance (e.g. very light pipelines). Hence, it does not include considerations with respect to temperature and pressure effects on materials, insulation, thermal conditions and flow assurance but gives procedures and criteria to global buckling only. Consequently, there are no limitations to pressure or temperature other than those caused by structural limitations from the material properties etc.

Global buckling is a load response and not a failure mode as such. Global buckling may, however, imply an ultimate failure mode such as:

- local buckling

- fracture

- fatigue.

This recommended practice covers global buckling ultimately limited by local buckling. The procedures provide also best estimates and upper bound strain values that may be used in a fracture assessment. For other failure modes reference is made to DNVGL-ST-F101.

Three global buckling scenarios of HT/HP pipelines are covered in this Recommended Practice:

1) Exposed pipelines on even seabed. Global buckling occurs in the horizontal plane. Post buckling configuration may be allowed.

2) Exposed pipelines on un-even seabed. Global deformation occurs first in the vertical plane (feed-in and uplift) and subsequently in the horizontal plane or when this is combined with scenario I, e.g. for curves on un-even seabed. Post buckling configuration may be allowed.

3) Buried/covered pipelines. Global buckling in the vertical plane, so called upheaval buckling. Only criteria for avoiding global buckling are given.

The trawl interference evaluation in this recommended practice is limited to lateral buckling only. Hence, trawling in free span is not covered by this recommended practice but by DNVGL-RP-F111.

With reference to trawling applicability see also [3.5.3]. For other design issues, reference is made to other codes, see [1.5].

The design procedures and criteria in this recommended practice are based on vast number of analyses. In spite of this very special combinations may give un-anticipated results and the designer shall evaluate all results critically.

The provided design procedures are considered being applicable in general. The basis for the development has been pipelines in the range from 10" to 42".

Document History

September 1, 2019
Global buckling of submarine pipelines
This recommended practice gives guidance on design for two global buckling scenarios for high temperature and high pressure pipelines: Unburied pipelines on even and uneven seabed where global...
September 1, 2019
Global buckling of submarine pipelines
This recommended practice gives guidance on design for two global buckling scenarios for high temperature and high pressure pipelines: 1) Unburied pipelines on even and uneven seabed where global...
September 1, 2019
Global buckling of submarine pipelines
This recommended practice gives guidance on design for two global buckling scenarios for high temperature and high pressure pipelines: 1) Unburied pipelines on even and uneven seabed where global...
April 1, 2018
Global buckling of submarine pipelines
This recommended practice gives guidance on design for two global buckling scenarios for high temperature and high pressure pipelines: 1) Unburied pipelines on even and uneven seabed where global...
DNVGL-RP-F110
August 1, 2017
Global buckling of submarine pipelines due to high temperature/high pressure
Scope and application This recommended practice applies to structural design of rigid pipelines with a potential to buckle globally. This normally implies so called HP/HT pipelines but also...

References

Advertisement