----- Original Message -----From: mustak patelSent: Wednesday, March 19, 2008 8:05 AMSubject: [MW:/] tolerance for CE
Hi guys
What is the tolerance given in the AMERICAN CODES for CE value for applicability of WPS and welder qualifications? Is it an essential variable? I think in British or japanese standards its given + 0.003 % Max.
Appreceiate any feed back.
Thanks and Regards
On Tue, 18 Mar 2008 rajesh patel wrote :
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>dear Friebds,
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>Adyard Abudhabi LLC
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>--- "Bathula Raghuram (Mumbai - PIPING)"
><R.Bathula@ticb.com> wrote:
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> > No exchange of information since last 1 week, that's
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> > -----Original Message-----
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> > Sent: Tuesday, March 18, 2008 12:10 PM
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> > Subject: Re: [MW:659] Bolt Length in ASME B31.3
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> > Dear Mr. Bathula Raghuram,
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Section I. PRINT READING 3-1. GENERAL a. Drawings . Drawing or sketching is a universal language used to convey all necessary information to...
Thursday, March 20, 2008
[MW:676] Re: [MW:/] tolerance for CE
The CE is an essential variable as per BS EN 288-9 & BS 4515 (Cross country pipeline). The acceptable variance is -0.06 to + 0.03 from the CE of material used for qualification.
For Sour service conditions when NACE MR 01 75 (ISO 15156-3) is applicable, it is the responsibility of the fabrication/ manufacturing company to ensure that, necessary controls are in place to restrict the hardness to 22HRC maximum. In order to limit this (Hardness) without any PWHT, restrictions( essential variables) includes/ shall be extended (from the normal applicable welding codes) to chemistry & Heat treatment conditions of material(s) used for PQR & materials to be used for production.
It is normally found that CE, Heat treatment condition & thickness plays a major role final hardness of weld/ HAZ.
with best regards,
Sanjeevan
GPS
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