Hi Sasa,
Attached are some guidelines on electrode selection and for welding of cast iron. Cast irons (SG and grey CIs) are weldable to a certain degree, white cast irons are not weldable. The conventional ways are to use Pure Nickel (99% ENi-CI) or Iron Nickel(55% Ni, E-NiFE-CI) electrodes. The later is more suited for welding on rusty, oiled and greased surfaces.
Cast iron could be inspected by conventional LPI and MPI techniques. Often in LPI, the castings would have a tendency to bleed due to entrapment of excessive penetrant, hence proper cleaning of the penetrant are required.
ASME Sec VIII, DIV-1(Chapter UCI) is on cast iron pressure vessel. However welding is not greatly encouraged. Cast iron welding techniques are still more repair welding as of now.
Thanks.
From: pgoswami@sympatico.ca [mailto:pgoswami@sympatico.ca]
Sent: Monday, April 19, 2010 10:42 AM
To: GOSWAMI Pradip -THERMAL
Subject: FW: [MW:4880] Welding of cast iron
Date: Mon, 19 Apr 2010 07:39:28 -0700
From: mkh_200@yahoo.com
Subject: [MW:4880] Welding of cast iron
To: materials-welding@googlegroups.com
What are the precautions before welding the ductile cast iron in pipe with Ø20?
Is there any NDT can applied after welding?
What is the applicable code for this welding??
SASA
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