...

Case story

EQUALISING RING REINFORCED
EXPANSION JOINTS
FOR HIGH PRESSURE

Chemical plant

Russia

EJMA

Equalizing ring reinforced expansion joints are a good solution for solving the challenges posed by applications exposed to high pressures. This recent project was designed, manufactured and tested for a Russian fertilizer producer. These ring reinforced expansion joints were part of a larger project which also included pressure balanced expansion joints.

 

Why ring reinforcement?
An optimal combination of both pressure integrity and service life is achieved when a multi-layered expansion joint bellows is supported with ring reinforcement. A 100% pressure test is always performed to verify the ring’s pressurised integrity. The rings are usually fabricated from round bar or sheet/plate in stainless or suitable alloy steels. These are then precisely machined to suit the convolutions profile. In order to ensure the dimensional integrity with each convolution, the rings are always controlled via a full visual check. Equalising rings are solid stainless steel rings which are externally fitted on the bellows. The rings are precisely machined in order to fit into the root between each of the bellows convolutions. The purpose of the rings is to reinforce the bellows against internal pressure. By adding moment of inertia to the bellows cross section, the bellows tendency to blow out or buckle (also called squirm) is counteracted and its stability and pressure integrity is enhanced. Bellows with reinforcing rings can be produced for any type of expansion joint (axial, lateral or angular etc.).

 

Experience with ring reinforcement
Belman is highly experienced in the design, manufacture and test of expansion joints with equalizing ring reinforcement. We have successfully manufactured expansion joints with different dimensions and for different applications, designed for a working pressure of more than 185 barg. One vessel expansion joint was pressure tested at 251 barG. Belman can deliver expansion joints with ring reinforcement in accordance with EN 13445, EN 14917 and EJMA and other standards upon request.

DESIGN FEATURES

The Equalising Ring Reinforced Expansion Joints for high pressure have the following design parameters:
Dimension: DN 350 • Installation length: 970 mm • Medium: Steam • Design pressure: 82 barg • Design temperature: -27°C/+20°C • AX: +0/-24 mm • Bellow: 1.4571 • Flanges and welding ends: 1.0565/1.1106 • Inner sleeves: 1.0565/1.1106 • Design code: EJMA

CLIENT BENEFIT

  • Suitable solution for a high pressure application
  • Reduced loads on pumps, turbines and connected equipment
  • Reduced space required for structures that carry fix points and guides
  • Increased stability through the ring reinforcement
  • Benefit from the considerable know-how of an experienced manufacturerk
Pressure balanced expansion joint with ring reinforcement
Ring reinforced pressure balanced expansion joint
RELATED INFORMATION

TECHNICAL information

  • Technical information on High Pressure Expansion Joints is available in the Expansion Joint Catalogue
    page 379
  • Installation examples of Pressure Balanced Expansion Joints are available in the Expansion Joint Catalogue
    pages 79 – 85

REFERENCES 

PhosAgro • Air Liquide • ICL • Cabot Corporation • Unilever • Schenectady Europe • Metafrax • Johnson Formox • OCI • Solvay •  SASA • IBN Sina • Xstrata • SABIC • Ineos • Mexichem • BASF • Borsod chem • ENI • Messer Group • Croda • Nouryon • Swecem • SILA • Dow •  CF Fertilizers • SSAB • Kronospan • Wanhua • Perstorp • FMI Process • Dovechem • Masisa • Norcarb • Adama • Sasol • SIBUR • BAGFAS • Norcarb • Nouryon • Celanese • KGHM • Aurubis • Pfizer

TRUSTED CRAFTMANSHIP

RELATED CASE STORIES

TESTED AT 200 BARG

Remarkable Coner Relief Expansions Joints designed for 145 barg and tested at 200 barg for Nuclear Power Plant.

SPECIAL RING REINFORCEMENT

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

TESTED AT 356 BARG

Spectacular Gimbal Expansion Joint designed for 215 barg and tested at 256 barg for petrochemical facility.

LET US DESIGN A CUSTOM DESIGN SOLUTION FOR YOU

CONTACT US

(+45) 7515 5999

[email protected]

Top