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Material selection for offshore environment when not specified in the project requirements or BOD

asked Oct 8, 2015 in Material by philyanko (1,060 points)
When there is no specification or requirement to select materials for bulk items for offshore condition, what are the general guidelines one can use to select materials suitable for its operating environment?

1 Answer

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answered Oct 9, 2015 by abuHaferssas (320 points)

Please use the following guidelines as rules of thumb:

  • Materials should be chosen with regards to previous operating experience on similar duties on offshore, salt-laden, marine installations.
  • Galvanic compatibility between dissimilar materials with, if necessary, the use of isolation sets to prevent galvanic corrosion.
  • Ductile iron should not be used without the prior approval of PURCHASER
  • All proposed plastic components should be as a minimum flame retardant UV resistant, and non-degradable.
  • All spindles, bushings, bolting, screws, etc. should be manufactured from a suitable grade of stainless steel or other corrosion proof material.
  • All molded polyester parts should be in an anti-static version for hazardous area locations.
  • The use of asbestos in any form is prohibited.
  • The use cast iron is prohibited.
  • Marine grade aluminum may be used after prior approval of PURCHASER.

Note: All proposed materials should be approved by the project prior to procurement.