As remembered, even in welded condtions shall not exceed 200 BHN in SA engineering standards, it is a full package during design as per below requirements where we have to fullfill SAs condition and requirement.
Yes you should have your project approved weld matrix / PMS / LINE LIST which ensured with the requirements.
Welding Requirements for Pressure Vessels -W-01X
Hardness testing is required on production welds for the following applications:
a) For all materials in sour service.
b) For vessels PWHTed for service (see 13.3).
c) Vessels of P-No. 4 or 5 material.
The testing shall be in accordance with NACE RP0472 and the requirements listed below. The testing location and frequency shall be in accordance with NACE RP0472. No exemptions, as allowed in NACE RP0472, are permitted. The maximum allowable hardness for P-No. 1 materials is BHN 200. For all other materials, it shall be the equivalent hardness as specified in NACE MR0175/ISO 15156 (equivalent hardness conversions shall be in accordance with 2c3). Welds for external attachments on vessel shells are exempt from hardness testing.
a) For all materials in sour service.
b) For vessels PWHTed for service (see 13.3).
c) Vessels of P-No. 4 or 5 material.
The testing shall be in accordance with NACE RP0472 and the requirements listed below. The testing location and frequency shall be in accordance with NACE RP0472. No exemptions, as allowed in NACE RP0472, are permitted. The maximum allowable hardness for P-No. 1 materials is BHN 200. For all other materials, it shall be the equivalent hardness as specified in NACE MR0175/ISO 15156 (equivalent hardness conversions shall be in accordance with 2c3). Welds for external attachments on vessel shells are exempt from hardness testing.
I hope your case does not have any impact except if it is not from above following applications, still we check 10% hardness for sourservice for onplot / pipelines.
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Mohamed Muneeb Mahaboob
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I fully agree Jurgen Prinsen.--I think on our material specification, we should clearly indicate that the hardness should not be higher than 200 brinell.
On Tuesday, February 12, 2019 at 9:16:02 AM UTC+7, Jurgen Prinsen wrote:This 200HB is only mentioned as in delivery condition, not in as welded condition.As welded hardness depends on chemistry and cooling rate (e.g preheat, heat-input, wall thickness)RegardsJurgen Prinsen IWE/MScWeld-Tech BVWelding consultancy and engineering since 1988Van: "José Juan Jiménez Alejandro" <jjjim...@gmail.com>
Aan: material...@googlegroups.com
Verzonden: Zondag 10 februari 2019 18:09:34
Onderwerp: Re: [MW:29081] Hardness for SA516 Grade 70I was looking for that data in the Code, I could not find it, hopefully someone has better luck and share the hardness data of this steel, with reference to the standard; On the other hand, when a pressure vessel carries the ASME stamp, the Authorized Inspector of the Authorized Inspection Agency necessarily has to intervene with your company has a contract, the Authorized Inspector has the obligation to advise and give you technical support.El dom., 10 feb. 2019 a las 6:42, BCK 055 (<bck...@gmail.com>) escribió:PWHT is followed spec, and WPS should be shown hardness test value.Sent from my Blackberry
googlegroups.com Subject: [MW:29073] Hardness for SA516 Grade 70For a pressure vessel designed with stamped under ASME VIII Div.1, there is a requirement that: "Hardness values should not exceed 200 brinell for the welds / material of shell."
Shell material is specified as SA516 Grade 70.
I am concerned the requirements for hardness and material will automatically require stress relief for all pressure vessel parts.
Would SA516 Grade 70 have hardness lower than 200 Brinell?
Thank you.
Regards,
RKD
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