Hi,I dont find where is the interpass temp.and all in QW403.6?Pls.Find below the Extraction from ASME Sec.IX-2007QW-403.6
The minimum base metal thickness qualifiedis the thickness of the test coupon
T or 5⁄8 in. (16 mm),whichever is less. However, where
T is less than 1⁄4 in.(6 mm), the minimum thickness qualified is
1⁄2T. This limitationdoes not apply when a WPS is qualified with a PWHT
above the upper transformation temperature or when an
austenitic material is solution annealed after welding.Regarding Interpass Temp.Pls.find below the extraction from code.QW-406.8
An increase in the maximum interpass temperatureof more than 100°F (56°C) from that achieved on
the test coupon and recorded on the PQR. The interpass
temperature shall be measured and recorded separately for
each tempering weld bead layer and, if any, for the surface
weld bead layer(s). The WPS shall specify the maximum
interpass temperature limits for each tempering bead layer
separately and for the surfacing weld bead layer(s), if any.Hi limesh,As he pointed out for interpass temp.your wps shall be with interpass temp 140+56 =196Thanks & Regards,(Karthik)Karthikeyan.SQA/QC ManagerGetabec Energy Co.,Ltd.379,Moo6,Soi8,Nikhomphatana,Rayong-21180,Thailand.Phone: 0066 38 897035-8 (Off)Fax: 0066 38 897034Hand Phone: 0066 892512282
--- On Tue, 9/14/10, John Henning <jhenning@deltak.com> wrote:
From: John Henning <jhenning@deltak.com>
Subject: [MW:7004] RE: 6999] ASME SEC IX Code Issue Date: Tuesday, September 14, 2010, 9:48 PM
No - Per QW-406.3 WPS maximum permitted is PQR value + 55C. Therefore WPS IP max = 140C + 55C = 195C
From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of limesh M
Sent: Tuesday, September 14, 2010 7:43 AM
To: materials-welding@googlegroups.com
Subject: [MW:6999] ASME SEC IX Code Issue
Dear All,
Design Code: ASME B31.3 Welding Code: ASME SEC IX
I have a Low temperature carbon steel impact tested PQR with a PWHT range of 600⁰±10⁰C.Is this condition giving an exemption for me on QW406.3 to prepare a WPS with maximum interpass temperature of 200⁰C.
Maximum interpass temperature observed during specimen welding: 140⁰C
Regards,
Limesh
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