Case story

EXPANSION JOINT HANDLES
HIGH PRESSURE
THRUST FORCE

Oil platform

Norway

ASME and NORSOK

This small, but very special Expansion Joint is engineered for an oil Platform in Norway.

 

Client issue

The oil platform had two pipes going into one pipe in their sand removal cyclone. This constellation of the pipes resulted high pressure and high pressure thrust force on this section of the pipeline. Normally installation of an Expansion Joint may not be the preferred solution at first, however an Expansion Joint ended up being the exact solution the client preferred.

 

Why installation of an Expansion Joint?

The preferred component to absorb both the movements high pressure and high pressure thrust force generated in the cyclone of the oil platform, is often a pipe loop or and expansion joint. A pipe loop expansion joint is space-requiring to be as flexible as an Expansion Joint. Further a correct designed expansion joint can both absorb large movements and operate under critical parameters when carefully designed for it. In this way the Expansion Joint actually can ensure smooth and safe operation. After deep analysis, advanced calculations, Inventor models made by Belman’s skilled and experienced engineers, it turned our that an Expansion Joint was the best component for this pipe section.

 

Added value to the oil platform

Belman in close cooperation with the oil platform and its cooperative partners designed a highly engineered Expansion Joint, which were a combination of both an Inline Pressure Balanced Expansion Joint and an Externally Pressurized Expansion Joint bringing the features and benefits of both types. This remarkable solution was designed according to ASME and NORSOK and made from 100% Duplex except the bellows, which were being made from Inconel 625 to ensure the highest possible flexibility and at the same time resistance to corrosion. As the media is sand sludge containing sea water, high requirements were put on the materials and on the solution and its weldings to eliminate options for the media to pack up and make the expansion joint corrode earlier than expected. With this Expansion Joint solution all challenges were solved in one component.

DESIGN FEATURES

This highly engineered Expansion Joint has the following design parameters:
Dimension: DN 150 • Design temperature: 95°C • Design pressure: 30 barG • AX: +/-10 mm • Bellows: Inconel 625 • All other components: Duplex 2205 • Design code: ASME and NORSOK

CLIENT BENEFIT

  • Safe and smooth operation
  • The best solution of all options
  • Absorption of movements resulted by high pressure and high pressure thrust forces
  • An innovative and top engineered component that ensure no risk of unplanned shutdown
RELATED INFORMATION

TECHNICAL information

  • Technical information on Pressure Thrust is available in the
    Expansion Joint Catalogue

    pages 414 – 415
  • Explanation of Expansion Joints versus pipe loops is available in the
    Expansion Joint Catalogue

    pages 20 – 21

REFERENCES 

Total Fina Elf • BP • OMV • Gunvor Petroleum (Prev. Kuwait Petroleum Europoort B.v (Q8)) • Shell • Statoil • Rosneft • Enap • TOR • MOL • Chevron • Eni • Murco Petroleum Limited • Linde Ag • Qapco • Lukoil • Preem • Total • PKN Orlen • Saudi Aramco • KNPZ • Maersk Oil • Tatneft • Ceylon Petroluem • Termo Petroleo • Repsol • Equinor (Statoil) • Novatek • Valero • China National Petroleum Corporation (CNPC) • Ineos • National Refinery • Valero • GE Oil & Gas • ExxonMobil • Sinopec

TRUSTED CRAFTMANSHIP

RELATED CASE STORIES

FinGER TYPE WITH REINFORCEMENT

Finger Type Expansion Joint with ring reinforcement for high pressure in a chemical plant.

FINGER TYPE EXPANSION JOINT FOR 82 BARG

Equalizing Ring Reinforced Finger Type Expansion Joint was the solution for a manufacturer of fertilizers.

Pressure BALANCED CORNER EXPANSION JOINTS

Pressure Balanced Corner Expansion Joints with ring reinforcement for high pressure (145 barg).

Top