APPLICATION & MATERIAL GUIDE

Materials for Seawater and Chloride Piping

Chloride concentration, temperature, flow, oxygen, crevices and fabrication quality control pitting and stress-corrosion risk. 316L may suit limited conditions; duplex and super-duplex families are considered for more severe exposure.

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YOUR QUESTION

Which material is suitable for seawater or chloride service?

OPTION 1

Stainless Steel 316L

Grade
TP316L · WP316L · F316L
Reference standard
ASTM A312 / A403 / A182

Offers improved pitting resistance over 304L, subject to chloride and temperature limits.

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OPTION 2

Duplex 2205

Grade
UNS S31803 / S32205
Reference standard
ASTM A790 / A815 / A182

Higher strength and improved chloride stress-corrosion resistance.

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OPTION 3

Super Duplex 2507

Grade
UNS S32750 / F53
Reference standard
ASTM A790 / A815 / A182

Used for severe chloride, desalination and offshore conditions after engineering review.

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INFORMATION REQUIRED

Confirm before selection

  • Chloride level and temperature
  • Velocity, crevices and stagnant zones
  • PREN and corrosion-test requirements
  • Welding, ferrite and surface condition
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