Case story


Oil storage tank farm

Arabian Gulf


12 Expansion Joints made completely from 254 SMO and a further 18 Expansion Joints made from austenitic SS 316 were installed in a crude oil storage tank farm in the Arabian Gulf. Through the addition of an extra tank to its existing infrastructure the plant increased its overall capacity and sustained its production target. 254 SMO is a high-alloy austenitic stainless steel developed for use in aggressive chloride-bearing media or seawater applications.


Why SMO 254?
254 SMO is a high-alloy austenitic stainless steel developed for use in aggressive chloride-bearing media or seawater applications. The 254 SMO is characterised by its high chromium content, this is further complemented by its molybdenum and nitrogen content which gives 254 SMO excellent resistance to pitting and crevice corrosion. Since these oil storage tanks are located in the Arabian Gulf (saline conditions) the use of this material was an optimal solution for the environment. In addition to this, the coating of the flanges was also specially selected due to its protective qualities.


Why paint?
As corrosion is an important issue in off-shore applications, the Expansion Joints were painted with a three layered, two component Epoxy paint, giving a total Dft. Of 300 mm. On top of the primer a two component polyurethane high glossy coat was added. This provided a robust protective coating in the severely corrosive atmospheric environment. The applied paint offers maximum corrosion protection in the saline working environment, guarantees the lifelong positive visual appearance and has no need for additional maintenance.


Expertise with all material types
Belman are experienced in working with a wide range of materials. We hold references for both Inconel, Incoloy, titanium, nickel, Duplex, Alloy 59 and Hastelloy Expansion Joints. Additionally, Belman has a huge stock of raw materials to ensure short delivery times. We stock all kinds of stainless steels, Incoloy, Inconel, titanium and more.


The 254 SMO Expansion Joints have the following design parameters:
Dimension: DN 300 – DN 400 • Installation length: 240 – 280 mm • Medium: Crude oil • Design pressure: 19,3 BarG • Design temperature: 50°C • LA: +/-1 mm • Bellow: 1.4547 (254 SMO) • Flanges: 1.4547 (254 SMO) • Inner sleeves: 1.4547 (254 SMO)


  • Suitable solution for the application
  • Reliability of the Expansion Joint designed to work under the operating parameters
  • Excellent resistance to pitting and crevice corrosion
  • Optimal material for the saline conditions surrounding the application
  • Guaranteed to deliver safe, reliable and smooth operation.
  • Benefit from the considerable know-how of an experienced manufacturer

TECHNICAL information

  • Technical information on Expansion Joint materials is available in the Expansion Joint Catalogue
    page 54-55
  • Resistance tables, to help you find the proper material for the application and media you are working with, is available in the Expansion Joint Catalogue
    page 440-459


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 • Petrogal • NOV • Ruhr Oel •




These very special Expansion Joints are made from Alloy 188 due to the design temparature being +900°C.


Due to the design parameters the bellows in this Expansion Joint are made from Inconel 625 (LCF).


Hastelloy to withstand high-stress service in a corrosive and erosion-prone environment in a chemical plant.