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Re: [MW:35326] Pipe 304L(P8) – Pipe 304L(P8)

By Materials & Welding
High Carbon, More chance of Chrome Depletion at boundaries (Less Creep Resistance) 


On Mon, Nov 18, 2024 at 8:09 PM Marco Nunes <marcovsky82@gmail.com> wrote:
Can  anyone provide some assistance in the issue identified below:


The details are as follows:

 
Details

Parent material Pipe 304L(P8) – Pipe 304L(P8)
Inservice temperature range – 35-85 °C
Operating Pressure – 0.4 -0.5 MPaG
Process Type – Process Condensate.
Carbonic acid – there may be the presence of carbonic acid as indicated by CGCL.
 

Approved Process

WPS# P8-P8 AR - Filler material ER308L- F6 filler metal
 

Quality Issue

ER308H rods were used instead of ER308L on two locations of the 304L piping.
 

Technical Advice Request

The client indicated that the use of the ER308H Filler Wire instead of the ER308L has a higher risk of intergranular corrosion and corrosion related issues.  
 

Please advise on the short term or long-term quality effects on the integrity of the welded joints where the ER308H filler wire were utilized.

 

Thanking you in advance.

Mark Nunes

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