Case story

EXPANSION JOINTS FOR A HIGH TEMPERATURE PIPELINE

Power Plant

South Europe

EJMA

Belman was recently consulted by a client to engineer and manufacture Expansion Joints for a high temperature pipeline at a South European Power Plant.

 

Client challenge

The challenge with this Expansion Joint project as Belman was asked to design for our client was, to design excellent engineering of Expansion Joints that easily and smoothly year after year would be able to work with temperatures of up to 600°C (1112°F), absorb large movements, and at the same time considerable external forces.

 

Important tasks for the client
Other very important tasks for especially this case where the external forces that the Expansion Joint would be exposed to. The external forces originate from a combination of the deadweight of a connecting pipe between the two Hinged Expansion Joints and the anticipated wind load on the system.

 

The Belman solution

An Engineering job with such high demands required exceptional engineering knowledge in the entire process from development to design to production and delivery. By choosing Belman A/S, the client is guaranteed the world’s probably best engineering and service team for the design, manufacture and delivery of Expansion Joints for their project. The result was a system of three Expansion Joints constructed from 1CrMO9-10 (1.7380) consisting of two Hinged Expansion Joints and one Unrestrained Expansion Joint. The excellence of this well-thought-out solution is that the external forces that the Expansion Joint will be exposed to will be absorbed in the Hinged Expansion Joint, whereas the Unrestrained Expansion Joint would not be subjected to external forces.

DESIGN FEATURES

The Expansion Joints for the high temperature pipeline have the following design parameters:

Type: UN1SH • Dimension: DN 1200 • Built-in length: 1161 mm • Design temperature: 600°C • Design pressure: –0,025/+0,025 barG • AN: +/-2° • Bellows: 1.4828 (AISI 309) • Flanges, pipe ends: 1.7380 (10CrMo910) • Design Code: EJMA

Type: UN1SH • Dimension: DN 1200 • Built-in length: 1297 mm • Design temperature: 600°C • Design pressure: –0,025/+0,025 barG • AX: +0/-243 mm • AN: +0,12/-0° • Bellows: 1.4828 (AISI 309) • Flanges, pipe ends: 1.7380 (10CrMo910) • Design Code: EJMA

Type: UN2SU • Dimension: DN 1200 • Built-in length: 1477 mm • Design temperature: 600°C • Design pressure: –0,025/+0,025 barG • AX: +0/-291 mm • LA: +42/-0 mm • Bellows: 1.4828 (AISI 309) • Pipe ends, middle pipe: 1.7380 (10CrMo910) • Design Code: EJMA

CLIENT BENEFIT

  • Short on-time delivery
  • A verified and optimized Expansion Joint solution.
  • Reliability of the Expansion Joint designed to work under the operating parameters
  • Expansion Joint solution designed to avoid operational issues due to the deadweigth of the connecting pipe
  • Hinges to absorb the external forces the piping system is exposed to
RELATED INFORMATION

TECHNICAL information

  • Technical information on Hinged Expansion Joints is available in the Expansion Joint Catalogue
    pages 29-30
  • Pipeline design examples using Hinged Expansion Joints is available in the Expansion Joint Catalogue
    page 68-71 and pages 75-77

REFERENCES 

Vattenfall • Termo Petroleo • Ørsted (Dong Energy) • RWE • Irkutsk Energo • STEAG • Novosibirsk Energo • Mosenergo  •  Drax • Hofor • Tauron • PakGen • BHEL • Ceylon Electricity Board • Rosatom • RWE Npower • Fortum • EDF (British Energy) • AEP Energy Services •  E.ON • Inter RAO • Fernwärme Wien • ENGIE Electrabel • Enel • Howden Turbo UK • Uniper • Veitur • Ceylon • Howden • Mitsuibishi Power • Stadtwerke Flensborg • Kraftzer •

TRUSTED CRAFTMANSHIP

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