Mr. Abhisekh,
Pl.refer to your mail and the reply as follows:
a. Both electrodes do give good impact results only up to - 29 (E 6010) and -30 (E 7018) deg.C. only.
a. E 6010 is a deep penetration type electrode ( avg. penetration of 2.00 2.50 mm) and well suitable for root run in
small/medium bore pipes there is no accessibility for repair welding, but Not for F/C due to rough arc nature.
The Hydrogen content is > 30 ml. of H2 per 100 grams of weld metal. Balnce runs are by E 6013 / E 7018 or so.
a.1 E 7016H4 R (or) E 7018 H4 R electrodes are not to be compared with E 6010.Both electrodes are to be compared
to & much superior to E 7016 & E 7018 respectively, in the sense, the weld metal has much longer life than the
weld metal deposited with normal type basic electrodes, due to its lower impurity levels.
a.2. While the Hydrogen content is < 15 ml. of H2 per 100 grams of weld metal in E 7018 & E 7016, it is much lower in
E 7016H4 R & E 7018 H4 R electrodes. i.e., The H2 level is <4 ml/100 grams of weld and typical values are < 1.9 to
2..0 ml only ( measured in accordance with AWS/ANSI 4,3-86) specifications..
a.3. That means while normal basic electrodes to be dried at 300 deg.C prior to use, H4R type electrodes do not
require any re-drying at ll. They are vacuum packed and could be used straight on the job.
a.4 All the electrodes are medium penetrate type and could be used for Root and F.C passes.
a.5. E 7016 / 7016 H4R gives more root penetration with DCEN compared to DCEP and E 7018/H4R as they are used
with DCEP only.
Sridhar.
-----------------------------------------------------------------------------------------------------------------------------------------------------
Pl.refer to your mail and the reply as follows:
Impact tested at ( -40) deg C
My Question is in refinery piping B31.3, pipeline , in root welding ( CS) I have used E6010 . Which one is superior between E6010 & E 7016 -1 H4R for root runs & why ?? please elaborate.
small/medium bore pipes there is no accessibility for repair welding, but Not for F/C due to rough arc nature.
The Hydrogen content is > 30 ml. of H2 per 100 grams of weld metal. Balnce runs are by E 6013 / E 7018 or so.
a.1 E 7016H4 R (or) E 7018 H4 R electrodes are not to be compared with E 6010.Both electrodes are to be compared
to & much superior to E 7016 & E 7018 respectively, in the sense, the weld metal has much longer life than the
weld metal deposited with normal type basic electrodes, due to its lower impurity levels.
a.2. While the Hydrogen content is < 15 ml. of H2 per 100 grams of weld metal in E 7018 & E 7016, it is much lower in
E 7016H4 R & E 7018 H4 R electrodes. i.e., The H2 level is <4 ml/100 grams of weld and typical values are < 1.9 to
2..0 ml only ( measured in accordance with AWS/ANSI 4,3-86) specifications..
a.3. That means while normal basic electrodes to be dried at 300 deg.C prior to use, H4R type electrodes do not
require any re-drying at ll. They are vacuum packed and could be used straight on the job.
a.4 All the electrodes are medium penetrate type and could be used for Root and F.C passes.
a.5. E 7016 / 7016 H4R gives more root penetration with DCEN compared to DCEP and E 7018/H4R as they are used
with DCEP only.
Sridhar.
-----------------------------------------------------------------------------------------------------------------------------------------------------
From: ABHISHEK GHOSH <ghoshabhishekmech@gmail.com>
To: pgoswami <pgoswami@quickclic.net>; c sridhar <sridhar305@yahoo.com>; John Henning <jhenning@deltak.com>
Sent: Thursday, 20 December 2012 9:09 AM
Subject: E7016 vs E6010
To: pgoswami <pgoswami@quickclic.net>; c sridhar <sridhar305@yahoo.com>; John Henning <jhenning@deltak.com>
Sent: Thursday, 20 December 2012 9:09 AM
Subject: E7016 vs E6010
Dear Experts,
In our Structural Deck( Cellar, Mezannine ) Construction ( AWS D1.1) , we are using WPS of E 7016-1 H4 R ( root ) & Remaining passes with E 7018 H4 R & E 71T - 1 .
Material : API 5L 2W, AI 5L X52 ( AWS D1.1 - Group II)
Thickness range in WPS : 8- 65 mm
Preheat : upto 38 mm = 30 deg C , 38- 65 mm = 65 deg C
Impact tested at ( -40) deg C
groove details : X bevel , K bevel, 1/2 Bevel etc.
Gouging : Air Arc / grinding.
My Question is in refinery piping B31.3, pipeline , in root welding ( CS) I have used E6010 . Which one is superior between E6010 & E 7016 -1 H4R for root runs & why ?? please elaborate.
Thanks & regards.
Abhishek Ghosh
Indonesia
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