RE: [MW:9844] HIC test as per NACE MR 0103 of SA 516 Gr.60 plates

Mr. Kamal,

 

I would think that you need to read the Foreword to MR-0103 carefully.I have extracted some text from this document. The summary is as follows:-

1. MR-0103 addresses a wide range of materials, fabrication issues related to SSC in wet H2S environments.
2. Wet H2S environment is dangerous to cause any of the hydrogen related cracking as listed below.
3. It is designer's responsibility to specify if such environment apply for the heat exchanger under fabrication (Usually process media or services are often specified on the drawing). This has to come from the EPC Contractor/or the client.
4. If the intended service is wet H2S then in addition to MR-0103, one has to look into the following specification:-

• NACE International Publication 8X194 (2006 Edition)--Materials and Fabrication Practices for New Pressure Vessels Used in Wet H2S Refinery Service.

• NACE International Publication 8X294 (2003 Edition), Review of Published Literature on Wet H2S Cracking of Steels.

• NACE SP0296-2010-Detection, Repair, and Mitigation of Cracking in Refinery Equipment in Wet H2S Environments

The end answer is if wet H2s service environment is confirmed then "HIC"  test and additional requirements as per 8X194 would be applicable.Otherwise the plates may be ordered straightforward as per MR-0103 requirements.

 

Thanks.

 

Pradip Goswami,P.Eng.IWE

Welding & Metallurgical Specialist & Consultant

Ontario, Canada.

Email-pgoswami@sympatico.ca,

pgoswami@quickclic.net

 

MR-0103- establishes material requirements for resistance to sulfide stress cracking (SSC) in sour refinery process environments, i.e., environments that contain wet hydrogen sulfide (H2S). It is intended to be used by refineries, equipment manufacturers, engineering contractors, and construction contractors.

The term “wet H2S cracking” in refining industry covers a range of damage mechanisms that can occur because of the effects of hydrogen charging in wet H2S refinery or gas plant process environments. One of the types of material damage that can occur as a result of hydrogen charging is SSC of hard weldments and microstructures, which is addressed by this standard. Other types of material damage include hydrogen blistering, hydrogen-induced cracking (HIC), and stress-oriented hydrogen-induced cracking (SOHIC), which are not addressed by this standard.

MR-0103 is based on the good experience gained with NACE MR0175/ISO 15156, but tailored to refinery environments and applications. Other references for this standard are NACE SP0296, NACE Publication 8X194, NACE Publication 8X294, and the refining experience of the task group member

MR-0103-establishes material requirements for resistance to SSC in sour petroleum refining and related processing environments containing H2S either as a gas or dissolved in an aqueous (liquid water) phase with or without the presence of hydrocarbon. This standard does not include and is not intended to include design specifications. Other forms of wet H2S cracking, environmental cracking, corrosion, and other modes offailure, although outside the scope of this standard, should be considered in the design and operation of equipment. Severely corrosive and/or hydrogen charging conditions may lead to failures by mechanisms other than SSC and should be mitigated by methods that are outside the scope of this standard.

.As per MR-0103 It is the user’s responsibility to ensure that a material will be satisfactory in the intended environment.The user may select specific materials for use on the basis of operating conditions that include pressure,temperature, corrosiveness, and fluid properties. A variety of candidate materials may be selected from this standard for any given component

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From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of MM Muthu
Sent: Saturday, February 12, 2011 8:25 AM
To: materials-welding@googlegroups.com
Subject: Re: [MW:9840] HIC test as per NACE MR 0103 of SA 516 Gr.60 plates

Dear Kamal,

Its not an essential requirement to perform HIC as per NACE MR 103. check for any client requirements or design requirements

If you want to perform HIC it should be as per NACE-TM0284, it only state the test method to perform HIC and measure CLR, CTR, CSR, it does not tells about acceptance criteria.

Check the below link which throws light on MR0175 & MR0103, it clearly says "It is extremely important to note that in both MR0175 and 

MR0103 the user is responsible for determining and judging whether the environmental conditions are such that the material requirements of the Standard should be applied. "

http://www.documentation.emersonprocess.com/groups/public/documents/articles_articlesreprints/nace_overview_corrosion2004.pdf

Cheers

MM

On Fri, Feb 11, 2011 at 9:51 AM, kamal nathan <kamalihi@gmail.com> wrote:

hi all,

        pls guide in the below query

 

we have to do a heat exchanger of material SA 516 Gr,60 conforming to NACE MR 0103.

 

we have ordered  for plates supply to a trader and do check test to conform the requirements of NACE MR 0103

 

what are all the test to be done as per NACE MR 0103?

 

Whether we have go for HIC test or not?

 

If we have to do HIC test for plate materails as per NACE where the clause is mentioned?

 

I have gone through NACE MR 0103 and could not interpret exactly whether HIC test is mandatory

 

please put all your comments related to this

 

kamal

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