Note that
In vertical uphill ur welding speed is slow because u r acting against natural gravitational direction thats why u r inputting more heat input and every one knows that impact properties directly affected by heat input that's why if you qualified in 3G uphill thatmeans u prove ur impact properties in max heat input conditions therefore u r qualified for all.
Further vertical downward welding sometimes related to electrodes capability to do so , as u know that all electrodes are not capable for vertical downward.
Hope clarifies.
Cheers
Ansari
On 14 Jun 2014 14:58, "kannayeram gnanapandithan" <kgpandithan@gmail.com> wrote:
-- what is reason to qualify in Vertical uphill position??--THANKS & BEST REGARDSKG.PANDITHAN, AWS-CWI, CSWIP 3.1CONSULTANT-WELDING & QUALITYOn Sat, Jun 14, 2014 at 12:27 PM, Arunachalam A <arunvani@gmail.com> wrote:When impact testing is a requirement, then .you need to qualify, The PQR in vertical uphill progression.Arun
On Friday, June 13, 2014, kannayeram gnanapandithan <kgpandithan@gmail.com> wrote:
1G&2g do not qualify for all position with impact requirements--
THANKS & BEST REGARDSKG.PANDITHAN, AWS-CWI, CSWIP 3.1CONSULTANT-WELDING & QUALITYOn Fri, Jun 13, 2014 at 6:19 AM, Anban <gane2478@hotmail.sg> wrote:
Dear Sirs--Appreciate simple breakdown explanations. Thanks in advance.QW-256 - state Essential Variable, Non-essential and Supplementary Essential Variables.And QW-256 shows SMAW, GMAW, FCAW, GTAW... Positions are supplementary essential variable, when CVN impact test (for toughness) is required.If not Position is non-essential Variables
QW-405.2 -states-1- A change from any position to the vertical position uphill progression.2- Vertical‐uphill progression (e.g., 3G, 5G, or 6G position) qualifies for all positions.3 - In uphill progression, a change from stringer bead to weave bead.4 - This variable does 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.__________________________________________________________________________________________________________________________We have received PQRs qualified in 1G and 2G ( with CVN at -30 deg C) and in WPS stated that production qualified for all groove and fillet in all positions?
I dont agree.
Does the forum experts agree.? If yes and/or not pls explain.
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