Hello Aly,
ASME Sec-IX have no specific guidelines for FCAW. However API RP-582 have a few. The extracts are as follows. For supports external atatchments there should be concenrs .For main pressure bearing components all of the follwing guideliens should preferably be met(when applicable).
If the welding consumable is impact tested at -18 Deg C.
Hope it helps to answer you question.
Thanks.
Pradip Goswami, P.Eng,IWE
Welding & Metallurgical Specialist
Ontario, Canada
pradip_goswami@yahoo.ca
FCAW:-
- Self-shielding FCAW (FCAW-S) may be used only for welding carbon steel structural items.
- FCAW with external gas shielding (FCAW-G) may be used for either groove or fillet welds for pressure boundary or structural welding, subject to the clauses as indicated below.
- For procedures requiring either impact or hardness testing, it is advisable to review weld metal properties with the consumable manufacturer to ensure the original qualified properties continue to be met.
- When rutile type (i.e. E71T-1 type) electrodes are used as-welded or in the postweld heat treated (PWHT’d) condition with impact testing required, the specific brand and trade name electrode used in production must be qualified on supporting PQRs with impact test results meeting the minimum design code requirements.
- Welding consumables shall be limited to the ASME/AWS classification used in the PQR.
- For welding pressure-containing equipment wall thickness in excess of 3/8 in. (9.5 mm), the diffusible hydrogen limit for FCAW electrodes (as manufactured) shall meet the specifications as below.
Diffusible Hydrogen Content for BM > 70 Ksi but < 85 Ksi should be -H8 type.
On Tue, Jul 1, 2014 at 7:00 AM, Mhaskar Aly <mhaskar.aly@gmail.com> wrote:
--Dear Friends,We have· FCAW filler wire E71T-1C (Impact tested @ -20°C as per MTC)· Vessel (SA516 Gr 70; MDMT -29°C; Impact test exempted)Can we use this filler wire for welding on above vessel for:1. Nozzle to Shell weld2. RF Pad to Shell weld3. Vessel external Attachments with pad.\4. Saddle Pad to Shell weldKindly provide Code ReferenceThanks & regardsAli Mhaskar,
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