From: "muneebslsa@gmail.com" <muneebslsa@gmail.com>
To: materials-welding <materials-welding@googlegroups.com>
Subject: Re: Re: [MW:28543] Fw: Fw: Back Purging for fillet welds
References: <2018110104095133465721@gmail.com>,
<CAJzm4eM6f2aFLHH+WDm0F_06t5C2Bn0s94Djk0cHPqyqLNdzBw@mail.gmail.com>
X-Priority: 3
X-GUID: CCE1D434-8590-432D-BD5C-09831B5E0137
X-Has-Attach: no
X-Mailer: Foxmail 7, 2, 7, 21[en]
Mime-Version: 1.0
Message-ID: <2018110517394849713439@gmail.com>
Content-Type: multipart/alternative;
boundary="----=_001_NextPart036126028357_=----"
This is a multi-part message in MIME format.
------=_001_NextPart036126028357_=----
Content-Type: text/plain;
charset="UTF-8"
Content-Transfer-Encoding: base64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------=_001_NextPart036126028357_=----
Content-Type: text/html;
charset="UTF-8"
Content-Transfer-Encoding: quoted-printable
<html><head><meta http-equiv=3D"content-type" content=3D"text/html; charse=
t=3DUTF-8"><style>body { line-height: 1.5; }blockquote { margin-top: 0px; =
margin-bottom: 0px; margin-left: 0.5em; }p { margin-top: 0px; margin-botto=
m: 0px; }div.foxdiv20181105173400624982 { }body { font-size: 12pt; font-fa=
mily: Calibri; color: rgb(0, 0, 0); line-height: 1.5; }</style></head><bod=
y>=0A<div>But it has been brought into subject that for MIC failures at ca=
pital projects, this is also an one of the rootcase, regardless of layup i=
ssues.</div><div><br></div><div><span style=3D"text-align: justify;">Its l=
ike they have confirmed that by their through thorough investigation, that=
the cause of the leakages were </span><span style=3D"text-align: jus=
tify;"><u>pin-hole</u></span><span style=3D"text-align: justify;">s in sev=
eral </span><span style=3D"text-align: justify;">welds. </span><=
span style=3D"text-align: justify;">Materials Specialist concluded that&nb=
sp;</span><span style=3D"text-align: justify;"><u>Microbiologically Influe=
nced Corrosion (MIC) </u></span><span style=3D"text-align: justify;">=
<u>exists</u> in 2 inch and in a 10 inch austenitic stainless s=
teel pipe on the ...... project.</span></div><div><span style=3D"text-alig=
n: justify;"><br></span></div><div><span style=3D"text-align: justify;">My=
question is that because of not purging fillet welds on SS, a PIN HOLE oc=
cured and thus MIC exists?</span></div><div><span style=3D"text-align: jus=
tify;"><br></span></div><div style=3D"text-align: justify;">If this is the=
case then last 1000 years of fillet welds on Ferrous (P8) and all non fer=
rous to be scrutinized.</div><div style=3D"text-align: justify;"><br></div=
><div style=3D"text-align: justify;">Regards,</div><div style=3D"text-alig=
n: justify;">Muneeb.M</div>=0A<div><br></div><hr style=3D"width: 210px; he=
ight: 1px;" color=3D"#b5c4df" size=3D"1" align=3D"left">=0A<div><span><div=
style=3D"MARGIN: 10px; FONT-FAMILY: verdana; FONT-SIZE: 10pt"><div style=
=3D"font-family: Calibri; font-size: 16px; line-height: 24px;"><br></div><=
/div></span></div>=0A<blockquote style=3D"margin-top: 0px; margin-bottom: =
0px; margin-left: 0.5em;"><div> </div><div style=3D"border:none;borde=
r-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm"><div style=3D"PADDING=
-RIGHT: 8px; PADDING-LEFT: 8px; FONT-SIZE: 12px;FONT-FAMILY:tahoma;COLOR:#=
000000; BACKGROUND: #efefef; PADDING-BOTTOM: 8px; PADDING-TOP: 8px"><div><=
b>From:</b> <a href=3D"mailto:kgpandithan@gmail.com">Kannayeram Gnana=
pandithan</a></div><div><b>Date:</b> 2018-11-01 08:43</div><div>=
<b>To:</b> <a href=3D"mailto:materials-welding@googlegroups.com">mate=
rials-welding</a></div><div><b>Subject:</b> Re: [MW:28543] Fw: Fw: Ba=
ck Purging for fillet welds</div></div></div><div><div class=3D"FoxDiv2018=
1105173400624982"><div dir=3D"ltr">not require for fillet weld.<br clear=
=3D"all"><div><div dir=3D"ltr" class=3D"gmail_signature" data-smartmail=3D=
"gmail_signature"><div dir=3D"ltr"><div><div dir=3D"ltr"><div><div dir=3D"=
ltr"><div><div dir=3D"ltr"><div><div dir=3D"ltr">THANKS & BEST REGARDS=
,<div>KG.PANDITHAN, BE, IWE, CSWIP 3.1,</div><div>ASNT-Level II in P=
T,MT,RT & UT.</div><div>International Welding Engineer. </div><di=
v>CONSULTANT-WELDING & QUALITY</div><div>Mobile no: +919940739349</div=
></div></div></div></div></div></div></div></div></div></div></div><br></d=
iv><br><div class=3D"gmail_quote"><div dir=3D"ltr">On Thu, Nov 1, 2018 at =
9:24 AM <a href=3D"mailto:muneebslsa@gmail.com">muneebslsa@gmail.com</a> &=
lt;<a href=3D"mailto:muneebslsa@gmail.com">muneebslsa@gmail.com</a>> wr=
ote:<br></div><blockquote class=3D"gmail_quote" style=3D"margin: 0px 0px 0=
px 0.8ex; border-left-width: 1px; border-left-color: rgb(204, 204, 204); b=
order-left-style: solid; padding-left: 1ex;"><div>=0A<div><span></span>Gre=
etings Experts,</div><div><br></div><div>Please go through the trailing ma=
il and advise, this is a debate between i and owner representative when i =
was in contractor for the requirement of back purging for fillet welds, in=
this case i just need your opinion.</div><div><br></div><div>I have delet=
ed the replies from owner representative as i feel its confidential and yo=
u will find only my writings for the subject.</div><div><br></div><div>Ple=
ase advise.</div><div><br></div><div>Regards,</div><div><br></div><div>Mun=
eeb.</div><blockquote style=3D"margin-top: 0px; margin-bottom: 0px; margin=
-left: 0.5em;"><div class=3D"m_2327560039458146408FoxDiv201811010359398618=
42"><blockquote style=3D"margin-top: 0px; margin-bottom: 0px; margin-left:=
0.5em;"><div><br></div><div style=3D"border:none;border-top:solid #b5c4df=
1.0pt;padding:3.0pt 0cm 0cm 0cm"><div style=3D"PADDING-RIGHT:8px;PADDING-=
LEFT:8px;FONT-SIZE:12px;FONT-FAMILY:tahoma;COLOR:#000000;BACKGROUND:#efefe=
f;PADDING-BOTTOM:8px;PADDING-TOP:8px"><div><b>Subject:</b> Re: RE: Ba=
ck Purging for fillet welds</div></div></div><div><div class=3D"m_23275600=
39458146408FoxDiv20180306223849204411">=0A<div><span></span><div>Greetings=
,</div><div><br></div><div>We requested this below butt weld joint for RT,=
which is stainless material including the wear pad, p<span style=3D"font-=
size:12pt;line-height:1.5;background-color:window">lease find the RT film =
which is accepted with NSD by QCS RTFI.</span></div><div><br></div><div>He=
nce concluding that no oxidation / doubtful inclusions or doubtful debris =
found, regardless to back purging for fillet weld which is non requirement=
s.</div><div><br></div><div>Also, some of the non releavent standards code=
s has been referred below for your just reference for the acceptable level=
of heat tints / oxidation / discoloration.</div><div><br></div><div>I con=
clude our all the wearpad cases either has no oxidations as per below film=
or acceptable level of oxidation as radiography is accepted.</div><div><b=
r></div><div>Thanks.</div><div><br></div><div><img src=3D"cid:_Foxmail.1@5=
b202481-add7-562d-d183-e8549a66a21f" border=3D"0" width=3D"618.5" height=
=3D"188.5"></div><div><img src=3D"cid:_Foxmail.1@1f3b10a8-a4a6-5295-7a11-c=
8c099702ead" border=3D"0" width=3D"553.5" height=3D"233"></div><div><br></=
div><div><br></div><div><font color=3D"#ff0000"><b><u>FOR YOUR REFERENCE O=
NLY:</u></b></font></div><div><u style=3D"background-color:rgb(255,255,0)"=
>NORSOK standard M-601</u></div><div>Regarding Discolaration / Heat tint i=
ssues, below are some acceptable oxidation of weld in stainless steel, whi=
ch is NORSOK standard M-601.</div><div><br></div><div>But, still they have=
shown for butt welds only not for fillet welds, so basically when it come=
s to fillet welds can be acceptable as there is no through and through but=
t welding, but just a corner fillet welds. </div><div><br></div><div=
><img src=3D"cid:_Foxmail.1@048dd524-67df-52a1-2467-496fbfe9d723" border=
=3D"0" width=3D"486" height=3D"640"><img src=3D"cid:_Foxmail.1@4e13d330-09=
e8-f93d-cc5f-cdfe60c3efa7" border=3D"0" width=3D"640" height=3D"580" style=
=3D"font-size:12pt;line-height:1.5;background-color:window"></div><div><im=
g src=3D"cid:_Foxmail.1@e332f96b-e2a1-e5ed-adbd-0ff311635223" border=3D"0"=
width=3D"640" height=3D"390.5"><img src=3D"cid:_Foxmail.1@ccc7fb6a-88ee-2=
04f-dccc-7aae725b90a7" border=3D"0" width=3D"442" height=3D"640" style=3D"=
font-size:12pt;line-height:1.5;background-color:window"></div><div><u styl=
e=3D"background-color:rgb(255,255,0)">AWS D 18.2</u></div><div>Again when =
collecting information i found some other codes, AWS D 18.2, <span st=
yle=3D"background-color:rgba(0,0,0,0);font-size:12pt;line-height:1.5">Guid=
e to Weld Discoloration Levels on </span><sp=
an style=3D"background-color:rgba(0,0,0,0);font-size:12pt;line-height:1.5"=
>Inside of Austenitic Stainless Steel Tube which =
is (</span><span style=3D"background-color:rgba(0,0,0,0);font-size:12pt;li=
ne-height:1.5">discoloration (heat-tint) </span><span style=3D"b=
ackground-color:rgba(0,0,0,0);font-size:12pt;line-height:1.5">criteria for=
sanitary (hygienic) welds in austenitic stainles=
s steel tube, but as this is sanitary again i coudnt take this i=
s as references, just for your information.</span></div><div><br></div><di=
v><img src=3D"cid:_Foxmail.1@613769ac-a254-851d-cb1c-8c863bf88eb4" border=
=3D"0" width=3D"548.5" height=3D"289.5"></div><div><span style=3D"backgrou=
nd-color:rgba(0,0,0,0);font-size:12pt;line-height:1.5"><br></span></div><d=
iv><img src=3D"cid:_Foxmail.1@860763d1-80b8-75f1-fcae-8b39ea221b77" border=
=3D"0" width=3D"575" height=3D"292.5"></div><div><br></div></div>=0A<div><=
br></div><div><span><div style=3D"MARGIN:10px;FONT-FAMILY:verdana;FONT-SIZ=
E:10pt"><p class=3D"m_2327560039458146408MsoSubtitle" align=3D"left" style=
=3D"margin:0px 0cm;font-size:12pt;line-height:24px;font-family:Cambria,ser=
if"><strong><span lang=3D"EN-US" style=3D"font-family:'Agency FB',sans-ser=
if"> <span style=3D"font-size:15px"> =
</span><u style=3D"font-size:15px">____=
_____________<u></u><u></u></u></span></strong></p><p class=3D"m_232756003=
9458146408MsoSubtitle" align=3D"left" style=3D"margin:0px 0cm;font-family:=
Cambria,serif;font-size:15px"><strong><span lang=3D"EN-US" style=3D"font-f=
amily:'Agency FB',sans-serif"> MOHAMED  =
; MUNEEB MAHABOOB<u></=
u><u></u></span></strong></p><p class=3D"m_2327560039458146408MsoSubtitle"=
align=3D"left" style=3D"margin:0px 0cm;font-family:Cambria,serif;font-siz=
e:15px"><br></p></div></span></div>=0A<blockquote style=3D"margin-top: 0px=
; margin-bottom: 0px; margin-left: 0.5em;"><div> </div><div style=3D"=
border:none;border-top:solid #b5c4df 1.0pt;padding:3.0pt 0cm 0cm 0cm"><div=
style=3D"PADDING-RIGHT:8px;PADDING-LEFT:8px;FONT-SIZE:12px;FONT-FAMILY:ta=
homa;COLOR:#000000;BACKGROUND:#efefef;PADDING-BOTTOM:8px;PADDING-TOP:8px">=
<div><br></div><div><b>Date:</b> 2017-05-13 20:11</div><div><br>=
</div></div></div><div><div class=3D"m_2327560039458146408FoxDiv2017051615=
0548321416"><div class=3D"m_2327560039458146408WordSection1">=0A<p class=
=3D"MsoNormal" style=3D"margin:0px 0in;font-size:12pt;font-family:'Times N=
ew Roman',serif"><br></p><p class=3D"MsoNormal" style=3D"margin:0px 0in;fo=
nt-size:12pt;font-family:'Times New Roman',serif"><span style=3D"font-size=
:11.0pt;font-family:"Calibri",sans-serif">=0A<b>Sent:</b> Saturd=
ay, May 13, 2017 6:10 AM<br><br>=0A<b>Subject:</b> Re: Back Purging for fi=
llet welds<u></u><u></u></span></p>=0A<p class=3D"MsoNormal" style=3D"marg=
in:0px 0in;font-size:12pt;font-family:'Times New Roman',serif"><u></u>&nbs=
p;<u></u></p>=0A<p class=3D"MsoNormal" style=3D"margin:0px 0in;font-size:1=
2pt;font-family:'Times New Roman',serif"><span style=3D"color:rgb(34,34,34=
);font-family:Calibri,sans-serif;font-size:12pt;line-height:18pt;backgroun=
d-color:window">Gentlemen,</span></p><div><div>=0A<div>=0A<p class=3D"MsoN=
ormal" style=3D"line-height:18pt;margin:0px 0in;font-size:12pt;font-family=
:'Times New Roman',serif"><span style=3D"font-family:"Calibri",s=
ans-serif;color:#222222"><u></u> <u></u></span></p>=0A</div>=0A<div>=
=0A<p class=3D"MsoNormal" style=3D"line-height:18pt;margin:0px 0in;font-si=
ze:12pt;font-family:'Times New Roman',serif"><span style=3D"font-family:&q=
uot;Calibri",sans-serif;color:#222222">Good Morning,<u></u><u></u></s=
pan></p>=0A</div>=0A<div>=0A<p class=3D"MsoNormal" style=3D"line-height:18=
pt;margin:0px 0in;font-size:12pt;font-family:'Times New Roman',serif"><spa=
n style=3D"font-family:"Calibri",sans-serif;color:#222222"><u></=
u> <u></u></span></p>=0A</div>=0A<div>=0A<p class=3D"MsoNormal" style=
=3D"line-height:18pt;margin:0px 0in;font-size:12pt;font-family:'Times New =
Roman',serif"><span style=3D"font-family:"Calibri",sans-serif;co=
lor:#222222">Practically, when it comes to long pipes and if we have to pu=
rge entire pipe, then the volume of purge according to pipe length might b=
e huge, at the=0A same time for current subject, CSD has <u>recommend=
ed</u> for back purge to avoid heat tint issues regardless to any ref=
erences or failure analysis / case studies. But still it is from CSD.<u></=
u><u></u></span></p>=0A</div>=0A<div>=0A<p class=3D"MsoNormal" style=3D"li=
ne-height:18pt;margin:0px 0in;font-size:12pt;font-family:'Times New Roman'=
,serif"><span style=3D"font-family:"Calibri",sans-serif;color:#2=
22222"><u></u> <u></u></span></p>=0A</div>=0A<div>=0A<p class=3D"MsoN=
ormal" style=3D"line-height:18pt;margin:0px 0in;font-size:12pt;font-family=
:'Times New Roman',serif"><span style=3D"font-family:"Calibri",s=
ans-serif;color:#222222">But let us be clear in the requirements, this is =
just for wear pad or any other more requirements in future (Materials &=
; Types of configurations)? </span><span style=3D"font-family:"C=
alibri",sans-serif;color:black">We=0A hope, these amendments will be =
revised in future standards.</span><span style=3D"font-family:"Calibr=
i",sans-serif;color:#222222"><u></u><u></u></span></p>=0A</div>=0A<di=
v>=0A<p class=3D"MsoNormal" style=3D"line-height:18pt;margin:0px 0in;font-=
size:12pt;font-family:'Times New Roman',serif"><span style=3D"font-family:=
"Calibri",sans-serif;color:#222222"><u></u> <u></u></span><=
/p>=0A</div>=0A<div>=0A<p class=3D"MsoNormal" style=3D"line-height:18pt;ma=
rgin:0px 0in;font-size:12pt;font-family:'Times New Roman',serif"><span sty=
le=3D"font-family:"Calibri",sans-serif;color:black">Anyhow i lea=
ve this to my management upon their final decision.</span><span style=3D"f=
ont-family:"Calibri",sans-serif;color:#222222"><u></u><u></u></s=
pan></p>=0A</div>=0A</div>=0A<div>=0A<p class=3D"MsoNormal" style=3D"line-=
height:18pt;margin:0px 0in;font-size:12pt;font-family:'Times New Roman',se=
rif"><span style=3D"font-family:"Calibri",sans-serif;color:black=
"><u></u> <u></u></span></p>=0A</div>=0A<div>=0A<p class=3D"MsoNormal=
" style=3D"line-height:18pt;margin:0px 0in;font-size:12pt;font-family:'Tim=
es New Roman',serif"><span style=3D"font-family:"Calibri",sans-s=
erif;color:black">Thanks.<u></u><u></u></span></p>=0A</div>=0A<div>=0A<p c=
lass=3D"MsoNormal" style=3D"margin:0px 0in;font-size:12pt;font-family:'Tim=
es New Roman',serif"><u></u> <u></u></p>=0A</div>=0A<div>=0A<p class=
=3D"MsoNormal" style=3D"margin:0px 0in;font-size:12pt;font-family:'Times N=
ew Roman',serif">Note:<u></u><u></u></p>=0A</div>=0A<div>=0A<div>=0A<p cla=
ss=3D"MsoNormal" style=3D"line-height:18pt;margin:0px 0in;font-size:12pt;f=
ont-family:'Times New Roman',serif"><span style=3D"font-family:"Calib=
ri",sans-serif;color:black">ASME SECTION IX: QG-109 DEFINIT=
IONS, QG-109.1 GENERAL<u></u><u></u></span></p>=0A</div>=0A<div>=
=0A<p class=3D"MsoNormal" style=3D"line-height:18pt;margin:0px 0in;font-si=
ze:12pt;font-family:'Times New Roman',serif"><span style=3D"font-family:&q=
uot;Calibri",sans-serif;color:black">backing gas: a ga=
s, such as argon, helium, nitrogen, or =
reactive gas, which is employed to <u>exclud=
e oxygen from the <span style=3D"background:#99cc00">r=
oot side (opposite from the welding side)</s=
pan> of weld joints</u>.<u></u><u></u></span></p>=0A</div>=
=0A<div>=0A<p class=3D"MsoNormal" style=3D"line-height:18pt;margin:0px 0in=
;font-size:12pt;font-family:'Times New Roman',serif"><span style=3D"font-f=
amily:"Calibri",sans-serif;color:black"><u></u> <u></u></sp=
an></p>=0A</div>=0A<div>=0A<p class=3D"MsoNormal" style=3D"line-height:18p=
t;margin:0px 0in;font-size:12pt;font-family:'Times New Roman',serif"><span=
style=3D"font-family:"Calibri",sans-serif;color:black">API RP 5=
82, PARA 7.5<u></u><u></u></span></p>=0A</div>=0A<p class=3D"MsoNormal" st=
yle=3D"margin:0px 0in;font-size:12pt;font-family:'Times New Roman',serif">=
<span style=3D"font-family:"Calibri",sans-serif;color:black">Whe=
never a back purging gas is selected to=
prevent oxidation or scale formation on&nbs=
p;the <span style=3D"background:#99cc00">underside of the&n=
bsp;weld</span>, the purge shall be maintained&nb=
sp;until at least 1/4 in. (6.3 mm) <spa=
n style=3D"background:#99cc00">depth of weld metal</span>&n=
bsp;has been </span><u></u><u></u></p>=0A<div>=0A<p class=3D"Mso=
Normal" style=3D"line-height:18pt;margin:0px 0in;font-size:12pt;font-famil=
y:'Times New Roman',serif"><span style=3D"font-family:"Calibri",=
sans-serif;color:black">deposited. <u></u><u></u></span></p>=0A</div>=
=0A</div>=0A<div>=0A<p class=3D"MsoNormal" style=3D"margin:0px 0in;font-si=
ze:12pt;font-family:'Times New Roman',serif"><u></u> <u></u></p>=0A</=
div>=0A<div>=0A<p class=3D"MsoNormal" style=3D"margin:0px 0in;font-size:12=
pt;font-family:'Times New Roman',serif"><u></u> <u></u></p>=0A</div>=
=0A</div>=0A<div>=0A<p class=3D"MsoNormal" style=3D"margin:0px 0in;font-si=
ze:12pt;font-family:'Times New Roman',serif"><u></u> <u></u></p>=0A<d=
iv>=0A<p class=3D"MsoNormal" style=3D"margin:0px 0in;font-size:12pt;font-f=
amily:'Times New Roman',serif">On Thu, May 11, 2017 at 9:09 PM, </p><=
blockquote style=3D"border-style: none none none solid; border-left-color:=
rgb(204, 204, 204); border-left-width: 1pt; padding: 0in 0in 0in 6pt; mar=
gin: 0px 0in 0px 0.5em;"><div><p class=3D"MsoNormal" style=3D"margin:0px 0=
in;font-size:12pt;font-family:'Times New Roman',serif"><span style=3D"font=
-size:11.0pt;font-family:"Calibri",sans-serif">=0A<b>Sent:</b> W=
ednesday, May 10, 2017 4:54 PM<br><br>=0A<b>Subject:</b> Re: Back Purging =
for fillet welds</span><u></u><u></u></p>=0A<div>=0A<div>=0A<p class=3D"Ms=
oNormal" style=3D"margin:0px 0in;font-size:12pt;font-family:'Times New Rom=
an',serif"> <u></u><u></u></p>=0A<p class=3D"MsoNormal" style=3D"marg=
in:0px 0in;font-size:12pt;font-family:'Times New Roman',serif"><span style=
=3D"font-size:12pt;line-height:1.5;background-color:window">Noted, this is=
just my interpretation from code requirements which does not have any pre=
cautionary advice even for corrosion for fillet welds.</span></p><div><p c=
lass=3D"MsoNormal" style=3D"margin:0px 0in;font-size:12pt;font-family:'Tim=
es New Roman',serif"><u></u><u></u></p>=0A<div>=0A<p class=3D"MsoNormal" s=
tyle=3D"margin:0px 0in;font-size:12pt;font-family:'Times New Roman',serif"=
> <u></u><u></u></p>=0A</div>=0A<div>=0A<p class=3D"MsoNormal" style=
=3D"margin:0px 0in;font-size:12pt;font-family:'Times New Roman',serif">As =
this is cost effective, i have to be pro-active on these requirements.<u><=
/u><u></u></p>=0A</div>=0A<div>=0A<p class=3D"MsoNormal" style=3D"margin:0=
px 0in;font-size:12pt;font-family:'Times New Roman',serif"> <u></u><u=
></u></p>=0A</div>=0A<div>=0A<p class=3D"MsoNormal" style=3D"margin:0px 0i=
n;font-size:12pt;font-family:'Times New Roman',serif">Anyhow, we will wait=
for CSD reply.<u></u><u></u></p>=0A</div>=0A<div>=0A<p class=3D"MsoNormal=
" style=3D"margin:0px 0in;font-size:12pt;font-family:'Times New Roman',ser=
if"> <u></u><u></u></p>=0A</div>=0A<div>=0A<p class=3D"MsoNormal" sty=
le=3D"margin:0px 0in;font-size:12pt;font-family:'Times New Roman',serif">T=
hanks.<u></u><u></u></p>=0A</div>=0A<div>=0A<p class=3D"MsoNormal" style=
=3D"margin:0px 0in;font-size:12pt;font-family:'Times New Roman',serif">&nb=
sp;<u></u><u></u></p>=0A</div>=0A<div>=0A<p class=3D"MsoNormal" style=3D"m=
argin:0px 0in;font-size:12pt;font-family:'Times New Roman',serif">Regards,=
<u></u><u></u></p>=0A</div>=0A<div>=0A<p class=3D"MsoNormal" style=3D"marg=
in:0px 0in;font-size:12pt;font-family:'Times New Roman',serif"> <u></=
u><u></u></p>=0A</div>=0A<div>=0A<p class=3D"MsoNormal" style=3D"margin:0p=
x 0in;font-size:12pt;font-family:'Times New Roman',serif">Mohamed Muneeb.<=
u></u><u></u></p>=0A</div>=0A</div>=0A<div>=0A<p class=3D"MsoNormal" style=
=3D"margin:0px 0in;font-size:12pt;font-family:'Times New Roman',serif">&nb=
sp;<u></u><u></u></p>=0A<div>=0A<p class=3D"MsoNormal" style=3D"margin:0px=
0in;font-size:12pt;font-family:'Times New Roman',serif">On Wed, May 10, 2=
017 at 8:44 PM, </p><blockquote style=3D"border-style: none none none=
solid; border-left-color: rgb(204, 204, 204); border-left-width: 1pt; pad=
ding: 0in 0in 0in 6pt; margin: 0px 0in 0px 0.5em;">=0A<p class=3D"MsoNorma=
l" style=3D"margin:0px 0in;font-size:12pt;font-family:'Times New Roman',se=
rif"><span style=3D"font-size:11.0pt;font-family:"Calibri",sans-=
serif;color:#1f497d"> </span><u></u><u></u></p>=0A<p class=3D"MsoNorm=
al" style=3D"margin:0px 0in;font-size:12pt;font-family:'Times New Roman',s=
erif"><a name=3D"m_2327560039458146408_m_-6868899188946759020_m_-849552951=
65043"></a><b><span style=3D"font-size:11.0pt;font-family:"Calibri&qu=
ot;,sans-serif">From:</span></b><span style=3D"font-size:11.0pt;font-famil=
y:"Calibri",sans-serif"><br>=0A<b>Sent:</b> Wednesday, May 10, 2=
017 3:21 PM<br>=0A<b>To:</b><br>=0A<b>Cc:</b> <br>=0A<b>Subject:</b> =
Back Purging for fillet welds</span><u></u><u></u></p>=0A<p class=3D"MsoNo=
rmal" style=3D"margin:0px 0in;font-size:12pt;font-family:'Times New Roman'=
,serif"> <u></u><u></u></p>=0A<p class=3D"MsoNormal" style=3D"margin:=
0px 0in;font-size:12pt;font-family:'Times New Roman',serif"><span style=3D=
"font-family:Calibri,sans-serif;font-size:12pt;line-height:18pt;background=
-color:window">Greetings,</span></p><div><div><div><p class=3D"MsoNormal" =
style=3D"line-height:18pt;margin:0px 0in;font-size:12pt;font-family:'Times=
New Roman',serif"><u></u><u></u></p>=0A</div>=0A<div>=0A<p class=3D"MsoNo=
rmal" style=3D"line-height:18pt;margin:0px 0in;font-size:12pt;font-family:=
'Times New Roman',serif">=0A<span style=3D"font-family:"Calibri"=
,sans-serif;color:black"> </span><u></u><u></u></p>=0A</div>=0A<div>=
=0A<p class=3D"MsoNormal" style=3D"line-height:18pt;margin:0px 0in;font-si=
ze:12pt;font-family:'Times New Roman',serif">=0A<span style=3D"font-family=
:"Calibri",sans-serif;color:black">This is with regards to our d=
iscussion for fillet welds purging requirement.</span><u></u><u></u></p>=
=0A</div>=0A<div>=0A<p class=3D"MsoNormal" style=3D"line-height:18pt;margi=
n:0px 0in;font-size:12pt;font-family:'Times New Roman',serif">=0A<span sty=
le=3D"font-family:"Calibri",sans-serif;color:black"> </span=
><u></u><u></u></p>=0A</div>=0A<div>=0A<p class=3D"MsoNormal" style=3D"lin=
e-height:18pt;margin:0px 0in;font-size:12pt;font-family:'Times New Roman',=
serif">=0A<span style=3D"font-family:"Calibri",sans-serif;color:=
black">This email is not to argue or debate, but just to ensure as per sta=
ndards / codes requirement and practical understanding of different interp=
retations and to finalize the precise requirement.</span><u></u><u></u></p=
>=0A</div>=0A<div>=0A<p class=3D"MsoNormal" style=3D"line-height:18pt;marg=
in:0px 0in;font-size:12pt;font-family:'Times New Roman',serif">=0A<span st=
yle=3D"font-family:"Calibri",sans-serif;color:black"> </spa=
n><u></u><u></u></p>=0A</div>=0A<div>=0A<p class=3D"MsoNormal" style=3D"li=
ne-height:18pt;margin:0px 0in;font-size:12pt;font-family:'Times New Roman'=
,serif">=0A<span style=3D"font-family:"Calibri",sans-serif;color=
:black;background:white">As referred, AWS D1.2, D1.6 & D10.6 does not =
have any such requirements purging fillet welds and also SAES-W-011</span>=
<span style=3D"font-family:"Calibri",sans-serif;color:black">&nb=
sp;itself=0A clearly saying, <u>single sided groove welds</u> wh=
ich is not fillet weld, continued to ASME SEC - 2 PART C with AWS D 1=
0.11 also saying the same (open root groove / full penetration joint).</sp=
an><u></u><u></u></p>=0A</div>=0A<div>=0A<p class=3D"MsoNormal" style=3D"l=
ine-height:18pt;margin:0px 0in;font-size:12pt;font-family:'Times New Roman=
',serif">=0A<span style=3D"font-family:"Calibri",sans-serif;colo=
r:black"> </span><u></u><u></u></p>=0A</div>=0A<div>=0A<p class=3D"Ms=
oNormal" style=3D"line-height:18pt;margin:0px 0in;font-size:12pt;font-fami=
ly:'Times New Roman',serif">=0A<span style=3D"font-family:"Calibri&qu=
ot;,sans-serif;color:black">Moreover, i have copied structural WPS as per =
AWS D1.6 for your reference, which does not have any back purging requirem=
ent for fillet welds and it is approved WPS.</span><u></u><u></u></p>=0A</=
div>=0A<div>=0A<p class=3D"MsoNormal" style=3D"line-height:18pt;margin:0px=
0in;font-size:12pt;font-family:'Times New Roman',serif">=0A<span style=3D=
"font-family:"Calibri",sans-serif;color:black"> </span><u><=
/u><u></u></p>=0A</div>=0A<div>=0A<p class=3D"MsoNormal" style=3D"line-hei=
ght:18pt;margin:0px 0in;font-size:12pt;font-family:'Times New Roman',serif=
">=0A<span style=3D"font-family:"Calibri",sans-serif;color:black=
">Please refer below & advise your opinion on this subject.</span><u><=
/u><u></u></p>=0A</div>=0A<div>=0A<p class=3D"MsoNormal" style=3D"line-hei=
ght:18pt;margin:0px 0in;font-size:12pt;font-family:'Times New Roman',serif=
">=0A<span style=3D"font-family:"Calibri",sans-serif;color:black=
"> </span><u></u><u></u></p>=0A</div>=0A<div>=0A<p class=3D"MsoNormal=
" style=3D"line-height:18pt;margin:0px 0in;font-size:12pt;font-family:'Tim=
es New Roman',serif">=0A<span style=3D"font-family:"Calibri",san=
s-serif;color:black">Thanks.</span><u></u><u></u></p>=0A</div>=0A<div>=0A<=
p class=3D"MsoNormal" style=3D"line-height:18pt;margin:0px 0in;font-size:1=
2pt;font-family:'Times New Roman',serif">=0A<span style=3D"font-family:&qu=
ot;Calibri",sans-serif;color:black"> </span><u></u><u></u></p>=
=0A</div>=0A<div>=0A<p class=3D"MsoNormal" style=3D"line-height:18pt;margi=
n:0px 0in;font-size:12pt;font-family:'Times New Roman',serif">=0A<b><u><sp=
an style=3D"font-size:16.0pt;font-family:"Calibri",sans-serif;co=
lor:black;background:yellow">SAES-W-011</span></u></b><u></u><u></u></p>=
=0A</div>=0A<div>=0A<p class=3D"MsoNormal" style=3D"line-height:18pt;margi=
n:0px 0in;font-size:12pt;font-family:'Times New Roman',serif">=0A<u><span =
style=3D"font-family:"Calibri",sans-serif;color:black">11.14&nbs=
p;Back purging</span></u><span style=3D"font-family:"Calibri&quo=
t;,sans-serif;color:black"><br>=0A11.14.1 An inert backing&=
nbsp;gas shall be used for GTAW or GMAW=
root passes on </span><u><span style=3D"font-family:&=
quot;Calibri",sans-serif;color:red">single-sided groove wel=
ds</span></u><span style=3D"font-family:"Calibri",sans-serif;col=
or:black"> for materials of ASME P-No. 5&nbs=
p;and higher.</span><u></u><u></u></p>=0A</div>=0A<div>=0A<p class=3D=
"MsoNormal" style=3D"line-height:18pt;margin:0px 0in;font-size:12pt;font-f=
amily:'Times New Roman',serif">=0A<span style=3D"font-family:"Calibri=
",sans-serif;color:black"> </span><u></u><u></u></p>=0A</div>=0A=
<div>=0A<p class=3D"MsoNormal" style=3D"line-height:18pt;margin:0px 0in;fo=
nt-size:12pt;font-family:'Times New Roman',serif">=0A<b><u><span style=3D"=
font-size:14.5pt;font-family:"Calibri",sans-serif;color:black;ba=
ckground:yellow">ASME SEC-2 PART C</span></u></b><u></u><u></u></p>=0A</di=
v>=0A<div>=0A<p class=3D"MsoNormal" style=3D"line-height:18pt;margin:0px 0=
in;font-size:12pt;font-family:'Times New Roman',serif">=0A<u><span style=
=3D"font-family:"Calibri",sans-serif;color:black">Annex</span></=
u><span style=3D"font-family:"Calibri",sans-serif;color:black"><=
br>=0A<u>Guide to AWS Specification for Consumabl=
e Inserts</u><br>=0A<u>(This Annex is not a =
part of AWS A5.30/A5.30M:2007, Specification for&=
nbsp;Consumable Inserts, but is <b>included for&n=
bsp;information purposes only.</b>)</u></span><u></u><u></u></p>=
=0A</div>=0A<div>=0A<p class=3D"MsoNormal" style=3D"line-height:18pt;margi=
n:0px 0in;font-size:12pt;font-family:'Times New Roman',serif">=0A<b><u><sp=
an style=3D"font-family:"Calibri",sans-serif;color:black">A6.2&n=
bsp;Purging.</span></u></b><span style=3D"font-family:"Calibri",=
sans-serif;color:black"> </span><u><span style=3D"font-family:"C=
alibri",sans-serif;color:red">To provide welded piping=
systems with<br>=0Athe integrity required by&nbs=
p;some piping codes, the weld joint<br>=0Amust&nb=
sp;be a full penetration joint with weld&nbs=
p;metal of consistently<br>=0Agood quality</span></u><span =
style=3D"font-family:"Calibri",sans-serif;color:red">.</span><sp=
an style=3D"font-family:"Calibri",sans-serif;color:black"> =
One method of obtaining this high level<br>=
=0Aof quality is the use of preplaced c=
onsumable inserts in<br>=0Aconjunction with a spe=
cific joint configuration together<br>=0Awith a s=
uitable protective gas back purge. The gas&n=
bsp;tungsten<br>=0Aarc welding process, either manual&=
nbsp;or automatic, generally<br>=0Ais used to con=
sume or fuse the consumable insert. </span><=
u><span style=3D"font-family:"Calibri",sans-serif;color:red">Thi=
s<br>=0Amethod is particularly adaptable to <b>co=
nditions encountered<br>=0Ain pipe welding but al=
so may be applied to flat plate type<br=
>=0Ajoints.</b> The <b>main consideration is that=
a full penetration<br>=0Agroove weld is req=
uired</b> when the accessibility is limited<br>=
=0Ato one side or when the reverse side=
of the joints is inaccessible<br>=0Afor wel=
ding.</span></u><u><span style=3D"font-family:"Calibri",sans-ser=
if;color:black"> </span></u><span style=3D"font-family:"Calibri&=
quot;,sans-serif;color:black">In order to obtain a&nbs=
p;suitably smooth,<br>=0Auniform under side weld =
surface without crevices or oxidation,<br>=0Aa pu=
rge must be established using a suitable&nbs=
p;protective<br>=0Agas. Since the second and thir=
d passes in the joint may<br>=0Atake the&nbs=
p;previously deposited consumable insert root pas=
s<br>=0Aabove the oxidizing temperature of the&nb=
sp;base and filler metal,<br>=0Ait may be ne=
cessary to maintain the purge until three&nb=
sp;layers<br>=0Aor 3=E2=81=8416 in. (4.8 mm) root=
thickness is obtained.</span><u></u><u></u></p>=0A</div>=
=0A</div>=0A<div>=0A<p class=3D"MsoNormal" style=3D"line-height:18pt;margi=
n:0px 0in;font-size:12pt;font-family:'Times New Roman',serif">=0A<span sty=
le=3D"font-family:"Calibri",sans-serif;color:black"> </span=
><u></u><u></u></p>=0A</div>=0A<div>=0A<p class=3D"MsoNormal" style=3D"mar=
gin:0px 0in;font-size:12pt;font-family:'Times New Roman',serif"><b><u><spa=
n style=3D"font-size:14.5pt;font-family:"Calibri",sans-serif;col=
or:black;background:yellow">AWS D 10.11</span></u></b><u></u><u></u></p>=
=0A</div>=0A<div>=0A<p class=3D"MsoNormal" style=3D"line-height:18pt;margi=
n:0px 0in;font-size:12pt;font-family:'Times New Roman',serif">=0A<u><span =
style=3D"font-family:"Calibri",sans-serif;color:black">Recommend=
ed Practices for Root Pass Welding Of P=
ipe Without Backing</span></u><u></u><u></u></p>=0A</div>=0A<div=
>=0A<p class=3D"MsoNormal" style=3D"line-height:18pt;margin:0px 0in;font-s=
ize:12pt;font-family:'Times New Roman',serif">=0A<u><span style=3D"font-fa=
mily:"Calibri",sans-serif;color:black">2. Preparations =
;for Purging</span></u><span style=3D"font-family:"Calibri"=
,sans-serif;color:black"><br>=0AThe highest quality root&nb=
sp;welds are obtained by using<br>=0AGTAW either&=
nbsp;with or without consumable inserts. A p=
urge<br>=0A(</span><u><span style=3D"font-family:"Calibri",sans-=
serif;color:red">displacement of air at the insid=
e surface of the weldment<br>=0Awith a suita=
ble gas</span></u><span style=3D"font-family:"Calibri",sans=
-serif;color:black">) is required for stainless a=
nd nonferrous<br>=0Apiping systems, except aluminum,&n=
bsp;if a smooth root surface<br>=0Ais to be&=
nbsp;obtained. Carbon steels and most low al=
loy steels <br>=0Acan be welded, </span><u><span =
style=3D"font-family:"Calibri",sans-serif;color:red">using =
an open root groove</span></u><span style=3D"font-family:&q=
uot;Calibri",sans-serif;color:red">, </span><span style=3D"font-=
family:"Calibri",sans-serif;color:black">without the u=
se<br>=0Aof an internal gas purge. Purging o=
f joints with consumable<br>=0Ainserts reduces th=
e occurence of defects resulting from oxidat=
ion<br>=0Aof the insert. Purging will also i=
ncrease welding<br>=0Aspeed. </span><u></u><u></u><=
/p>=0A</div>=0A<div>=0A<p class=3D"MsoNormal" style=3D"line-height:18pt;ma=
rgin:0px 0in;font-size:12pt;font-family:'Times New Roman',serif">=0A<span =
style=3D"font-family:"Calibri",sans-serif;color:black"> </s=
pan><u></u><u></u></p>=0A</div>=0A<div><br></div></div></blockquote></div>=
</div></div></div></div>=0A</blockquote>=0A</div>=0A<p class=3D"MsoNormal"=
style=3D"margin:0px 0in;font-size:12pt;font-family:'Times New Roman',seri=
f"><u></u> <u></u></p>=0A</div>=0A</div>=0A</div></div></blockquote>=
=0A</div></div></blockquote>=0A</div></blockquote>=0A</div>=0A<p></p>=0A--=
<br>=0A<a href=3D"https://materials-welding.blogspot.com/" target=3D"_bla=
nk">https://materials-welding.blogspot.com/</a><br>=0A<a href=3D"https://w=
ww.linkedin.com/groups/122787" target=3D"_blank">https://www.linkedin.com/=
groups/122787</a><br>=0A--- <br>=0AYou received this message because you a=
re subscribed to the Google Groups "Materials & Welding" group.<br>=0A=
To unsubscribe from this group and stop receiving emails from it, send an =
email to <a href=3D"mailto:materials-welding+unsubscribe@googlegroups.com"=
target=3D"_blank">materials-welding+unsubscribe@googlegroups.com</a>.<br>=
=0AVisit this group at <a href=3D"https://groups.google.com/group/material=
s-welding" target=3D"_blank">https://groups.google.com/group/materials-wel=
ding</a>.<br>=0AFor more options, visit <a href=3D"https://groups.google.c=
om/d/optout" target=3D"_blank">https://groups.google.com/d/optout</a>.<br>=
=0A</blockquote></div>=0A<p></p>=0A-- <br>=0A<a href=3D"https://materials-=
welding.blogspot.com/">https://materials-welding.blogspot.com/</a><br>=0A<=
a href=3D"https://www.linkedin.com/groups/122787">https://www.linkedin.com=
/groups/122787</a><br>=0A--- <br>=0AYou received this message because you =
are subscribed to the Google Groups "Materials & Welding" group.<br>=
=0ATo unsubscribe from this group and stop receiving emails from it, send =
an email to <a href=3D"mailto:materials-welding+unsubscribe@googlegroups.c=
om">materials-welding+unsubscribe@googlegroups.com</a>.<br>=0AVisit this g=
roup at <a href=3D"https://groups.google.com/group/materials-welding">http=
s://groups.google.com/group/materials-welding</a>.<br>=0AFor more options,=
visit <a href=3D"https://groups.google.com/d/optout">https://groups.googl=
e.com/d/optout</a>.<br>=0A</div></div></blockquote>=0A</body></html>
------=_001_NextPart036126028357_=------
You can check the attchments, but anyhow when it comes to thinner membrane regardless of whatever the consequences might be the case for oxidation which is non occurrence when we simply imagine for fillet welds but anyhow socket welds aren't with this case of lap to lap fillets, hence a detailed study of amendment to be incorporate with through and through case studies and failure analysis stipulating clauses shall be ensured in international standards.
Anyhow now the case as per the research is chromium depletion (causing heat tints / discoloration) for thinner membranes especially for fillets, So to be conclude that there should be some detailed studies as per AWS D18.2 / NORSOK STANDARD M-601 especially for fillet welds.
At any cost don't accept the requirement unless owner is providing his clause which is already stipulated in owner's manual or international standards, the research i have ensured is from my previous owner requriement which i did not agree and the international standards which i have quoted is for open root / butt welds.
Thanks.
Regards,
MOHAMED MUNEEB MAHABOOB
From: sandeep kumarDate: 2019-02-24 11:20Subject: Re: [MW:29146] RE: 28982] Backing gas as per API RP 582To be specific, as you know purging purpose in SS is mainly for shield against oxidation which took place when molten metal kiss the oxygen from atmosphere. Now when you welding a fillet weld the amount of oxidation is corresponding to the amount of heat supplied vs. encounter of molten weld metal to the atmosphere without shielding.--A fillet weld having a configuration without any gap and zero flow of molten metal to the back side will defiantly not require any purging. Its recommended to use a optimized low heat input. I advise you although to put gas backing upto 2 mm thickness as the low heat dissipation in SS can melt through thickness during welding.Thanks & regardsSandeep Kumar
On Friday, February 22, 2019 at 6:19:06 AM UTC+3, John Manoj wrote:Thanks for the reply, Is back purging is required when we do fillet welding on a thin (2mm to 5mm) SS base material, for example some cleat welding or pad welding or socket welding with GTAW or SMAW process.Expecting a reply.Thanks,ManojDear Mr. Goswami,In 2016 editions of API RP 582 the purging gas requirement given in subcluases (a) (b) (c) but in previous editions purging requirement given in clauseOn Mon, Jan 28, 2019 at 9:53 AM PGoswami <pgos...@quickclic.net> wrote:--
SMAW never requires back purging. It's the "slag" generated by the process, which protects the weld root. This is just back to basic scenario.
Thanks.
P.Goswami.P.Eng, IWE.
Independent Welding & Metallurgical Specialist
Saudi Aramco: Designated Project Welding Engineer(DPWR)& Quality Management Personnel
Linkedin: https://www.linkedin.com/in/
pradip-goswami-2999855/ Email:p...@quickclic.net,p
radip.goswami@gmail.com From: material...@
googlegroups.com [mailto:material...@googlegroups.com ] On Behalf Of Manoj John
Sent: January 27, 2019 8:04 PM
To: material...@googlegroups.com
Subject: [MW:28982] Backing gas as per API RP 582
Dear Experts,
As per clause 7.3 of API RP 582 Ed. 2016 back purging required for GTAW & GMAW process but no where I could found for other process like SMAW. Is it mean that if we do welding with SMAW process back purging is not required?
Please share your interpretation.
Thanks and regards
Manoj.
--
https://materials-welding.blogspot.com/
https://www.linkedin.com/groups/122787
---
You received this message because you are subscribed to the Google Groups "Materials & Welding" group.
To unsubscribe from this group and stop receiving emails from it, send an email to materials-weld...@googlegroups.com .
Visit this group at https://groups.google.com/group/materials-welding .
For more options, visit https://groups.google.com/d/optout .
https://materials-welding.blogspot.com/
https://www.linkedin.com/groups/122787
---
You received this message because you are subscribed to the Google Groups "Materials & Welding" group.
To unsubscribe from this group and stop receiving emails from it, send an email to materials-weld...@googlegroups.com .
Visit this group at https://groups.google.com/group/materials-welding .
For more options, visit https://groups.google.com/d/optout .
https://materials-welding.blogspot.com/
https://www.linkedin.com/groups/122787
---
You received this message because you are subscribed to the Google Groups "Materials & Welding" group.
To unsubscribe from this group and stop receiving emails from it, send an email to materials-welding+unsubscribe@googlegroups.com.
Visit this group at https://groups.google.com/group/materials-welding.
For more options, visit https://groups.google.com/d/optout.
No comments:
Post a Comment