Thanks Jmec
but as you know most of valves and flanges in gas treatment plant are A 105. in our case by Micrography on material shows they have fine grain that can cause it heat treated well (on other evidence is the body passed the Charpy test but flanges cant). sample valve was 4 inches which...
Hi all
I am involve of a project ( gas compressor station). according to spec. of project contractor should supply all valve with A350 LF2 ( though it is over spec because we don't have cold services only site condition is -12 c in winter and fluid temperature is 40 c).
as request of client we...
Hi
In design of gas compressor stations we consider cold stack (approximately 20 meter hight) for emergency case. But in API 521 Standard insisted we design cold stack with hot flare requirement which it leads us to height of more than 50 meter length with more than 80000 square meter land...
Dear friends
One of big issues for me in oil and gas projects is estimating price of valves especially ball valves ( manual , MOV,ESDV,...). I know the best method is getting budgetary price from manufactures, but as you know some manufactures are careless in giving precise price in budgetary...
Dear all
OK thanks, but I am going to find a method (ex: metallographic or something else method) which endorse the failure is regarding to H2S corrosion (SCC) not related to fault of test procedure or apply test condition.
Thanks
Dear Steve
Thanks for your comment. But you know that this material is belong to a package of valve which manufactured and all of test has been passed except SCC. (ie,HIC, Hydrotest, function test,… have been passed and accepted)
And I want to know we can trust to Metallographic examination or...
We have applied on forging material (A 105N) the SSC test according to NACE TM177. After the termination time (720 hour) we have noticed the sample is broken (we completely observed the condition of test ex, sampling mechanic, applied force, test media,..) . Forge master has quite confidence...
Dears
please send me some information about following question
how does anti rust paint apply on rusted iron?
is metal cleaned at first or could apply anti rust painting on rusted metal?
please consider i can't see any laminated or pitting area on base metal( we buy new produced metal two week...
Dear All
Please guide me about in checking drift in etabs software for 6 storey building which force is considered (seismic force or combined force)?
thanks
Dear Sir and specialists
HI
I ask question about changing the actuator of ON/OFF valves. We have many on/off valve in our gas treatment plant and some actuators were damaged and need to use spare parts for some of them and some item we will replace actuator totally. Also we have drawing of...
Dear Cio
I understand your correct concern completely .thanks
I don’t have Total specification which you mentioned in later recommendation (PVV142). Could you please send it to me?)
Thanks
SAM
Dear Cio
Your knowledge and experience is perfect, I want to say you two things and I am going to clarify it with you and guide me.
1- Please consider base material of ball is A186 F6A and my suggestion was inconel 625 weld overlays on ball (A186 F6A) and use tungsten carbide on inconel.( not...
Thanks for valuable reply
But please consider we had bad experience from HVOF method for tungsten carbide. Because some solid particles that flow up from well caused to have damage on hard faced (tungsten carbide) ball. With this result customer decide to change hard facing method from tungsten...
Thanks for your replies
Is it consider stellite overlay on ball as increase hardness and wearing coating protection also for corrosion protection?
In this stage I understand some coating company confirm full stellite on ball up to size 8 inch and don’t apply it for 8inch and above but I don’t...
Dear Friends
We have one order from my client to supply ON/OFF valve from size 4 up to 24 inch. Application is highly sour (H2S and CO2 and water and also a little CL). Material that costumer is ordered is A186 F6a for ball and also request for fully stellited of ball. I asked with some ball...
Dear Friends
We have one order from my client to supply ON/OFF valve from size 4 up to 24 inch. Application is highly sour (H2S and CO2 and water and also a little CL). Material that costumer is ordered is A186 F6a for ball and also request for fully stellited of ball. I asked with some ball...
