Members,
We have a case of valve disc material F44 and its weld overlaid with alloy 625(NICrMo3) and followed by weld overlaid with Stellite 6.
1. Is it a recommended method to follow and what must be the reason for doing the corrosion resistance overlay before hard facing.
2. What is the...
Members,
We have a case of valve disc material F44 and its weld overlaid with alloy 625(NICrMo3) and followed by weld overlaid with Stellite 6. Is it a recommended method to follow and what must be the reason for doing the corrosion resistance overlay before hard facing.
Members,
One of client specification mentioned corrosion test G48 method A with duration of 24 hours for forged flanges for UNS 31254 material. But for same UNS 31254 fittings(formed from pipe or plate) G48 method A with duration of 48 hours. Please tell why there is a difference in the...
Dear Team,
Power failure happened during heating cycle of PWHT of APL 5L X65 welds ( piping as per B31.3).understand there is no issue in re-doing the PWHT as the crystal transformation temperature is not reached.
1). Does this interruption will have any impact on metallurgy ?
2). What is...
Dear Team,
We have to PMI of Inconel forged material (ASTM B564) with spectro. After the PMI the burn damage due to PMI need to be removed by Grinding. So vendor has proposed grinding with Zirconia grinder in order to avoid the change in chemical composition of material Surface.
So please...
Dear team,
As we know use of CS wire brush over SS and inconel welds are not preferable as it will lead to contamination and rust spots generation. Similarly what will the impact of using ss wire brush over Inconel welds ?
Weld :- Inconel 625
Regards,
Ratheesh N
Dear Team,
F468 grade 625 manufactured by rolling operation and heat treatment (annealing) done on the bar prior to manufacture of studs. No annealing done after the rolling operation is completed. Is it acceptable
Regards,
Ratheesh
Dear All,
We have received input from manufacturer that the SAW pipe test coupons are doing simulated PWHT prior to MPQT as per API 5L.Please let us know why this simulated PWHT is doing for test coupon and whether this is required as per standard
Regards,
Ratheesh N
+918451991305
Dear All,
Please let us know what is the meaning of operating cycle mentioned in API 6A.table 57 refer PR2 for 200 operating cycle.what is the meaning fir this .. please help
Hi,
We are doing overlay by inconel 625 on API 5L Gr X65 .CE value as per WPS is a limiting value for production or can we use same material grade and thickness with higher CE value ?
Dear All,
We are having injection quill fittings.Material grade is inconel 625.
As we are referring the flange specification(SAMSS- Saudi Aramco standard),its having requirement of corrosion test G28. But for the same grade material (inconel 625) fittings is having requirement of corrosion...
Dear All,
We are procuring a valve. The material used is ASTM 182 F22. The material is having higher tensile strength , yield strength and hardness than normal F 22 materials. So is it acceptable?
And test certificate of this material will be certified as ASTM 182 F 22 ..will mention as...
Dear All,
We are procuring welded SA 403 fittings,During the review of WPS we found that PWHT (meniotned solution annealing as PWHT)is considered in WPS. As per SA 403 and Sec VIII div 1 , P8 material not required heat treatment ,unless design calculation say so.In our case there is no design...
Dear All,
We have qualified a two welder in a single specimen(GTAW+SMAW).Qualification thickness will be based on the deposited weld metal thickness or as per the specimen thickness ?
Ie out of 18 mm thk , GTAW - 4mm and SMAW 14 mm . So the GTAW welder qualified for unlimited thickness or...
Dear All,
There is 4 holes in choke valve body area which is in closed condition.Can anyone tell what is the function of these holes and why it is required.
Regards,
RATHEESH N http://files.engineering.com/getfile.aspx?folder=59dd765d-5b79-4bcc-8bcb-34e6d0201f48&file=20180319_134633.pdf
We do have a approved WPS and PQR and we are doing a repair welding without change of essential variables. Did we need to qualify a new wps separately for repair welding as per AWS D1.1 ?
As per AWS D1.1 , for Welded Restoration of Base Metal with Mislocated Holes.
"One reduced section tension...
Dear all,
We need to do machining of Nimonic 80-A.and after that we need to do heat treatment for increasing the hardness . So doing this what are the point we need to take care
And will there anyb change the %of elements like Nikal and chromium in the metal after heat treatment ? Please help
