NACE MR0175

[Moin - QC]

Hi,

Can somebody please explain the difference between ‘’ Material According to NACE MR0175’’ & ‘’ Hardness according NACE MR0175’’

I am purchasing some material from mill, but they said that they can meet the hardness requirement only, but cannot write ‘’ Material accordance to NACE MR0175’’ on material test certificate.

Material is seamless and welded pipe.

Thanks & Regards
SM

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[Philip, Taiye (Lagos)]

Hi Moin,

 

Material According to NACE MR0175, implies that, the material will meet NACE MR0175, standard requirement as in Mechanical properties, Tensile strength, impact values, Hardness values, corrosion resistance values, etc and material chemistry.

While Hardness according to NACE means, the material will meet only Hardness requirement of   NACE MR0175 only

Hope these clears your doubts

Regards

Philip Taiye

Principal QA/QC Welding Engineer

(MIPs Quality Control)

DeltaAfrik Engineering Limited

2nd Floor, City Express Bank Building

Plot 1637 Adetokunbo Ademola Street

Victoria Island, Lagos  Nigeria

Phone: +234-1-461-8508, +2341-461-6137 ext. 1257
Cell: +234-(0)-803-803-1396
Fax: +234-1-262-2418

e-mail: taiye....@worleyparsons.com

 

 

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[Ramprasad Chari]

Conformance to NACE MR0175 certifies material to be used for 'sour' gas applications which implies that material is resistant to various cracking mechanisms assoiated with H2S presence in a wet gas/liquid.If the mill is pre-qualified carrying out tests as per TM0177 standard(for SSC) and TM0284(for HIC) then mill can certify conformance.Alternatively,if the client permits you can carry out the test per heat per size to confirm conformance to NACE MR0175.For seamless pipe HIC may not be required but for welded pipe,you may have to carry out HIC as well as SSC test.Hardness is one of the criterion of max 22HRC.If hardness is not achieved in 'as 'condition in weld and HAZ,you may have to carry out PWHT to ensure that hardness is below 22 HRC.

Regards

Aarpee

--

[Sivashankar Nagamanickamsundaramoorthy]

Hi Mr.Aarpee,

 

 Wheather SSC test is required for the Seamless pipes for the confirmation to the  NACE requirements ?.

 

 

Regards

 

Siva

---

From: Ramprasad Chari <rampras...@gmail.com>
To: material...@googlegroups.com
Sent: Thu, September 23, 2010 1:48:58 PM
Subject: Re: [MW:7171] NACE MR0175

[Ramprasad Chari]

If the mill supplying a seamless pipe is pre-qualified to supply NACE pipes,you need not carry out SSC test.Mill shall indicate NACE conformance on their TC including Hardness values.Everything depends on the customer's requirements.Many a times it is seen that Gas/liquid is not 'sour' with partial pressure of H2S so low that  NACE does not apply but still customer insists for NACE conformance.As I have indicated in my previous mail,if your customer permits you,you can carry out SSC test on a pipe as per TM0177 standard and conform Nace compliance through lab test reports including hardness.You can go one step further and get micro test done as per ASTM E-45 method D and confirm absence of 'elongated MnS inclusions'.If the mill confirms NACR compliance,you do not have to carry out any other tests unless your customer has asked you additional specific tests.

Regards

Aarpee

[pgoswami]

Hello Syed,

 

If you look at the end of MR-0175,Part-2, 2003-version, the list of accepted materials for sour service are listed. There are specifications for a few seamless pipes also.

 

Coming back to your query: Material According to NACE MR0175’’—Implies that all the requirements of MR-0175 have been met by the manufacturer and the material is fit for sour service. If one goes through in details, MR-0175 provides the guidelines of what tests to be asked for sour services. See the sample below-ANNEX-E.

 

The second option specified by your manufacturer:- Hardness according NACE MR0175—does not make any real sense, this means they would conform to 22 HRC(248VHN) hardness requirements as required by the spec at the point of supply.

 

What’s the specification of Pipes to be purchased??. If it’s covered in MR-0175then the supplier has to stick a manufacturing and Q.A program meeting NACE MR-0175.If it’s newer materials, it requires qualification to MR-0175.

 

It would be good if you read the MR-0175 and specifically ask for the applicable clauses, for your application, then it will put the mills on the hook.

 

Thanks.

 

Pradip Goswami,P.Eng.

Welding & Metallurgical Engineer/Specialist

Email-pgoswami@sympatico.ca,

pgos...@quickclic.net

 

 

5 Purchasing information

5.1 The preparation of material purchasing specifications might require co-operation and exchange of data between the equipment user, the equipment supplier and the material manufacturer to ensure that the material purchased complies with NACE MR0175/ISO 15156-1 and this part of NACE MR0175/ISO 15156.

5.2 The following information shall be provided:

·          preferred material types and/or grades (if known);

·         equipment type (if known);

·          reference to this part of NACE MR0175/ISO 15156;

·          acceptable bases for selection of materials for SSC resistance (see Clause 7);

·          requirements for HIC resistance (see Clause 8).

5.3 The equipment user and the equipment supplier/material manufacturer may agree that carbon or low alloy steels other than those described and/or listed in Annex A may be selected subject to suitable qualification testing in accordance with Annex B and NACE MR0175/ISO 15156-1. The qualification requirements may be extended to

include resistance to SOHIC and SZC.

If the purchaser intends to make use of such agreements, extensions and qualifications, the appropriate additional information shall be clearly indicated in the materials purchasing specification. This information may include

·         requirements for SSC testing (see 7.1, 7.2),

·         service conditions for specific sour service application, and

·         other special requirements.

5.4 Annex C describes how to calculate the H2S partial pressure and Annex D gives guidance on how to determine the pH-value of a fluid.

5.5 The information required for material purchasing shall be entered on suitable data sheets. Suggested formats are given in Annex E.

 

 

 

---

[hemant solanki]

I think, you also have to take care that Nickel shall be less than 1%. CE shall not be more than 0.43%.

On Tue, 28 Sep 2010 01:12:39 +0530 wrote
>

Hello Syed,

If you look at the end of MR-0175,Part-2,2003-version, the list of accepted materials for sour service are listed. Thereare specifications for a few seamless pipes also.

Coming back to your query: MaterialAccording to NACE MR0175’’—Implies that all the requirementsof MR-0175 have been met by the manufacturer and the material is fit for sourservice. If one goes through in details, MR-0175 provides the guidelines ofwhat tests to be asked for sour services. See the sample below-ANNEX-E.

The second option specifiedby your manufacturer:- Hardness according NACE MR0175—does not make anyreal sense, this means they would conform to 22 HRC(248VHN) hardnessrequirements as required by the spec at the point of supply.

What’s thespecification of Pipes to be purchased??. If it’s covered in MR-0175thenthe supplier has to stick a manufacturing and Q.A program meeting NACE MR-0175.Ifit’s newer materials, it requires qualification to MR-0175.

It would be good ifyou read the MR-0175 and specifically ask for the applicable clauses, for yourapplication, then it will put the mills on the hook.

Thanks.

Pradip Goswami,P.Eng.

Welding & MetallurgicalEngineer/Specialist

Email-pgoswami@sympatico.ca,

pgos...@quickclic.net

5 Purchasinginformation

5.1 Thepreparation of material purchasing specifications might require co-operationand exchange of data between the equipment user, the equipment supplier and thematerial manufacturer to ensure that the material purchased complies with NACEMR0175/ISO 15156-1 and this part of NACE MR0175/ISO 15156.

5.2 Thefollowing information shall be provided:

·preferred materialtypes and/or grades (if known);

·equipment type (if known);

·reference to thispart of NACE MR0175/ISO 15156;

·acceptable basesfor selection of materials for SSC resistance (see Clause 7);

·requirements forHIC resistance (see Clause 8).

5.3 Theequipment user and the equipment supplier/material manufacturer may agree thatcarbon or low alloy steels other than those described and/or listed in Annex Amay be selected subject to suitable qualification testing in accordance withAnnex B and NACE MR0175/ISO 15156-1. The qualification requirements may beextended to

include resistance to SOHIC and SZC.

If the purchaser intends to make useof such agreements, extensions and qualifications, the appropriate additionalinformation shall be clearly indicated in the materials purchasingspecification. This information may include

·requirements for SSC testing (see7.1, 7.2),

·service conditions for specific sourservice application, and

·other special requirements.

5.4 Annex Cdescribes how to calculate the H2S partial pressureand Annex D gives guidance on how to determine the pH-value of a fluid.

5.5 Theinformation required for material purchasing shall be entered on suitable datasheets. Suggestedformats are given in Annex E.

---

From: material...@googlegroups.com[mailto:material...@googlegroups.com] OnBehalf Of Ramprasad Chari
>Sent: Monday, September 27, 201012:00 AM
>To:material...@googlegroups.com
>Subject: Re: [MW:7209] NACE MR0175

If the mill supplying a seamless pipe is pre-qualified to supply NACEpipes,you need not carry out SSC test.Mill shall indicate NACE conformance ontheir TC including Hardness values.Everything depends on the customer'srequirements.Many a times it is seen that Gas/liquid is not 'sour' with partialpressure of H2S so low that NACE does not apply but still customerinsists for NACE conformance.As I have indicated in my previous mail,if yourcustomer permits you,you can carry out SSC test on a pipe as per TM0177standard and conform Nace compliance through lab test reports includinghardness.You can go one step further and get micro test done as per ASTM E-45method D and confirm absence of 'elongated MnS inclusions'.If the mill confirmsNACR compliance,you do not have to carry out any other tests unless yourcustomer has asked you additional specific tests.

Regards

Aarpee

On Sat, Sep 25, 2010 at 6:03 PM, Sivashankar Nagamanickamsundaramoorthy<poovai...@yahoo.com>wrote:

Hi Mr.Aarpee,

Wheather SSC test is required for the Seamless pipes for theconfirmationto the NACE requirements ?.

Regards

Siva

---

From: Ramprasad Chari<rampras...@gmail.com>
>To: material...@googlegroups.com
>Sent: Thu, September 23, 20101:48:58 PM
>Subject: Re: [MW:7171] NACE MR0175

Conformance to NACE MR0175 certifies material to be used for 'sour' gasapplications which implies that material is resistant to various crackingmechanisms assoiated with H2S presence in a wet gas/liquid.If the mill ispre-qualified carrying out tests as per TM0177 standard(for SSC) and TM0284(forHIC) then mill can certify conformance.Alternatively,if the client permits youcan carry out the test per heat per size to confirm conformance to NACEMR0175.For seamless pipe HIC may not be required but for welded pipe,you mayhave to carry out HIC as well as SSC test.Hardness is one of the criterion ofmax 22HRC.If hardness is not achieved in 'as 'condition in weld and HAZ,you mayhave to carry out PWHT to ensure that hardness is below 22 HRC.

Regards

Aarpee

On Thu, Sep 23, 2010 at 10:53 AM, Moin - QC <Syed...@gerabgroup.com>wrote:

Hi,

Can somebody please explain thedifference between ‘’ Material According toNACE MR0175’’ & ‘’Hardness according NACE MR0175’’

I am purchasing some material from mill, butthey said that theycan meet the hardness requirement only,but cannot write ‘’Material accordance toNACE MR0175’’ on material test certificate.

Material is seamless and welded pipe.

Thanks & Regards
>SM

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>

[Moin - QC]

Dear Pradeep,

 

Thanks for information,

 

Material we intent to purchase is API 5L line pipes and A106 pipes for SOUR service, these  product specification are listed in NACE MR0175.

 

Manufacturer has confirmed that Value of nickel content on product analysis will be less than 1%, Sulphur will be 0.004% Maximum,  CE value will be less than 0.38 and material will be supplied in ‘’ Normalized formed’’ condition.

 

But still they deny to declare  the compliance with NACE MR0175/ISO 15156, they say that  ‘’ Only hardness according to NACE MR0175/ISO15156’’ will be reported on mill test certificate.

 

I was trying to find out the restriction NACE MR0175 set forth for API 5L and A106  material, all I could find was restriction on nickel, sulphur and delivery condition(i.e. hot forming or Normalizing etc) which have been complied with by the manufacturer, but still they deny to declare the compliance with NACE MR0175 which left me confused.

 

Could you please put some light on this issue.

 

 

REGARDS,
SYED MOIN

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[DOKKU AJAY]

Hello Moin,

 

As the requirements from NACE MR 0175 specified by you had been agreed by the material manufacturer & the values will be stated in the MTC, solves your problem.

 

i.e the MTC shall state all the test results, i,e hardness, nickel content, Heat-treament condition. If all the conditions are acceptable as per Annexure-A.2, then the material can be accepted.

 

Please refer the Technical Circular 1 issued in 200

 

Dokku Ajay Kumar
Mobile: +966 500071054

---

From: Moin - QC <Syed...@gerabgroup.com>
To: material...@googlegroups.com
Sent: Tue, September 28, 2010 4:30:48 PM
Subject: RE: [MW:7253] NACE MR0175

[DOKKU AJAY]

Resent, please ignore earlier e-mail as it was incomplete.

 

Hello Moin,

 

As the requirements from NACE MR 0175 specified by you had been agreed by the material manufacturer & the values will be stated in the MTC, solves your problem.

 

i.e the MTC shall state all the test results, i,e hardness, nickel content, Heat-treament condition. If all the conditions are acceptable as per Annexure-A.2, then the material can be accepted.

 

Please refer Clause 9 of Annexure -2, which states that "Suitable labelling or documentation is also acceptable". Hence MTC documenting the requirements is sufficient to accept the material.

 

I hope it was clear.

 

Dokku Ajay Kumar

 

Dokku Ajay Kumar
Mobile: +966 500071054

---

From: Moin - QC <Syed...@gerabgroup.com>
To: material...@googlegroups.com
Sent: Tue, September 28, 2010 4:30:48 PM
Subject: RE: [MW:7253] NACE MR0175

[pgoswami]

Hello Syed,

 

Materials for sour service should comply with the requirements of MR-0175.My understanding is that what NACE calls for that both manufacturer/supplier and the purchaser should be in compliance.

 

Purchaser or end users compliance is to specify the details as asked in Annex-E(see below).

 

Supplier/Manufacturer’s responsibility : Although there is no direct reference to supplier/fabricator responsibility in MR0175/ISO15156 the following sections imply responsibility.

• cooperate and communicate in an exchange of information between the end users and materials suppliers/manufacturers concerning required or suitable service conditions. ( Clause 5. to 5.5-Purchasing requirements)
•  ensure the material purchased meets the end users requirements and the requirements of the standard. (Clause 7.0  and others, especially hardness and all required manufacturing requirements)

Both API-5L and ASTM A-106 are NACE accepted materials, which means they had undergone various qualification and acceptance steps, plus the service history in similar environment to be accepted. Hence they are very known material in sour environment. So material may not be a bothersome issue.

However at the first place if your P.O and other related contract documents calls for conformance to MR-0175, then the supplier has to conform to this and specify the same in the paperwork..

As you stated below: -But still they deny to declare  the compliance with NACE MR0175/ISO 15156, they say that  ‘’ Only hardness according to NACE MR0175/ISO15156’’ will be reported on mill test certificate. This does not sound convincing, looks some wishy washy stuff???

 

MR-0175 calls for:-Materials complying with this part of NACE MR0175/ISO 15156 shall be made traceable, preferably by marking, before delivery. Suitable labeling or documentation is also acceptable.

 

May be it's good  to ask the supplier why this deviation? before accepting the material.

 

I think I've my best to clarify your doubt. Further you may use the attached guide for your future references on MR-0175.This document is an useful guidebook but  without any liability.

 

Thanks.

 

 

Pradip Goswami,P.Eng.

Welding & Metallurgical Engineer/Specialist

Email-pgoswami@sympatico.ca,

pgos...@quickclic.net

 

 

  

 

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[DOKKU AJAY]

Most of tehe times material manufacturers perform their own tests in the laboratories to ensure that the material is suitable for the requirement. However, what i can assume is, which even needs to be clarified with supplier, material manufacturer would not had tested the sample material for such conditions & would be resisting to specify complinace with NACE as he is not sure about it.

 

For eg: Material qualified to Sec.IIA has to undergo mechanical, chemical testing etc. However, NACE does not specify any testing requirements (Except for material suspected to HIC, SOHIC, SZC etc) for prequalified materials to ensure it's complaince, it's only the restriction to element such as hardness, certian chemical contents & heat treatment condition. Hence, it would be appropriate that equipment user accepts the material.

 

However, please refer the Clause 5 of MR0175/ISO 15156-1:2001 which was been further clarified in the Techincal Circular 1:2007 clearly defining the responsibilities of  equipment uses and manufacturer/ supplier.

 

Quote:

"It is the Equipment user's responsibility to ensure that any material specified for use in their equipment will be satisfactory in the service condition.

 

It is the equipment or materials supplier's responsibility to meet the metallurgivcal & manufcturing requirements and when necessary any additional testing requirements of MR0175 for the material selected in the condition in which it is to enter the service."

 

Unquote:

 

So, basically, it is the users call. I hope it is clear now.

 

Dokku Ajay Kumar
Mobile: +966 500071054

---

From: pgoswami <pgos...@quickclic.net>
To: material...@googlegroups.com
Sent: Thu, September 30, 2010 4:45:19 AM
Subject: [MW:7275] MW:7269] NACE MR0175

,