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[MW:15162] Regarding HIC TEST requrement FOR WET SOUR SERVICE

By Materials & Welding

Dear Sir,

 

I need your Help regarding HIC Test required or Not

 

Ques: Shell & tube heat exchanger , KJO PROJECT,Saudi ARAMCO, IN Datasheet Notes points menstion as

 

1)all materials in wet,sour service shall be resistant to SSC & HIC and shall meet the requirment of MRO175/ISO15156

2)CORROSION /EROSION is due to H2S & CO2 Content are 0.115 mole% & 0.024 respectively

 

 

 

our service is Sour service , hot oil at shell side & wet crude tube side our material is SA516gr70

 

pls refer aramco spec rgarding wet sour , CAN U ELABORATE ME REGARDING HIC TEST REQ OR NOT

 

 

Aramco Spec 32-SAMSS-007

 

Wet Sour HIC Services: Hydrogen Induced Cracking (HIC) resistant steel qualified in

accordance with 01-SAMSS-016 shall be specified for the following environments with

normal operating temperatures between 0°C (32°F) and 150°C (302°F):

Sour water service with a hydrogen sulfide (H2S) concentration above

2 mg/L (2 ppm) and a total pressure of 450 KPa absolute (65 psia) or greater.

Hydrocarbon services meeting the definition of sour environments in SAES-A-301,

where the H2S concentration of 2 mg/L (2 ppm) or more in the water phase is equivalent

to H2S partial pressure of 0.05 psia.

A hydrocarbon system exposed to an environment with a H2S concentration above

50 mg/L (50 ppm) in the water phase, regardless of H2S partial pressure.

Commentary Note:

HIC resistant steel is not required in caustic services, lean amine systems and rich amine

DGA systems.

 

regards,

 

Shaikh Ahmed

Inspection

08082560014

 

 

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