Intriguing remarks from your comments:
- mostly for used/overhauled valves (ball, gate, globe, butterfly, wellhead equipment, safety valves)
- inside an onshore oil production field
- mostly followed standards are API 6A, API 6D, API 598, API 527, ISO 5208, ASME B16.The problem is that I have...
Maybe more details/background over your inquiry.
Who are you? manufacturer, engineering company, end user or third party?
Which (geographical) region are you referring to?
Which type of valves?
Otherwise AI can answer your question, like below
Quote
The requirement for third-party presence...
Hi,
Please buy/subscribe/see at least API 598. The step cannot be any clearer than that.
Usually parties which commenced testing are only three: manufacturer, end user and third party testing companies. There are many reasons for them (better) not to post any videos.
Their reputation, tested...
Your initial questions:
Will the valve cavity become pressurized if you open the ball under pressure? Yes for sure, valves in partial open position will exposed its cavity towards (pressurized) upstream and/or downstream.
And if so, does that mean we should be venting all the cavities again...
Fully agree with LittleInch.
You need to define: Location (offshore/onshore/chemical/water treatment/pharmaceutical/etc.)? type of valve(gate/globe/check/BV,etc)? Was it due to worn out but still movable obturator or completely stuck? Dirty or relatively clean internal? Which trim (only...
Hi,
you are asking specific supplementary from specific end user (Shell). Better to consult with their representative or your counterpart in this case.
Would not find it anywhere in the net, at least the updated version one.
Yes, as per Obturator recommend, it is MESC SPE 77-302.
In summary...
Seems like Ring-O maybe Safe-O seal valve or copy of it. Easily 30+ years old
Not good:
- Diaphragm (under item 02) and ring seal 20 subject for fatigue due to pressure cycles
- when not fully energized (usually first stage of start-up), this valve have leakage path to outside (see hole next to...
What sort of gate valve are you using?
Syngas is very toxic acute and have some nasty particles within. Hence tightness (minimum to zero leakage) and 'scrapping' capability is critical.
Have tried all kind of 12"-900# valves for syngas 350degC, I would say through conduit gate valve is best...
What is your product and temperature?
I have good and not so good experience with Strahman, mainly for high viscosity and high temperature (around 250 degC above)?
SV-700 basically requires around 14-16 turns of the lever prior it start to fill your sampling cup
after reaching that start of...
Thanks LittleInch,
I tend to agree with you, however this is Operation request. Valves will be buried underground.
Brought the gate valve option but got reply with following comments:
- The bottom cavity of the valve body will collect water (corrosion) and rust (particles + flakes) over time...
Good day valve expert,
In need for super ball valve which have the capability to handle slurry and/or already have proven record of passing API 6AV1 Class III Sand Slurry testing.
Our product is Naphtha in carbon steel pipeline hence corrosion rate is quite high. Nonetheless ball valve PIG-able...
All pressure containing parts e.g. valve body, (forged) flanges end, etc. are subject for similar hardness and tensile requirement. if they pass then it is acceptable, at least from strength point of view, regardless where they were originated from.
See A961, one exception is from bar with...
Hello,
Not being "check valve" expert, but both indeed categorized as Non-Slam. Having both types installed on my site, IMO it is more whether small (down to micro) cracking pressure and relatively small Differential Pressure are required or not. If yes, then it would be the bottom one.
What...
Dear Valve professionals,
I will be part of steering committee for Valve World 2024. Appreciate if someone have some ideas or topics should be addressed?
Steering committee consist mainly end user, valve manufacturer/supplier and EPC. Some topics such as emission, standards (IOGP, ASME, etc.)...
Hallo,
Check axial = nozzle type, non-slam check valve
300# = ANSI flange class 300 rating
RF = Raised face
STL = usually Stainless Steel, but for me this is not a wise way to stamp it since there is so many SS family. More industrial standard is to write for example 316SS or 304 or 401, etc...
First of all, a manufacturer which cannot provide torque values of their own control valve, then there is something wrong with them. Assuming this is a question from end user (representative) since most suppliers do not want to disclose their valve details to competitors.
What was the reason you...
Not sure about the Hydrogen pressure, but most likely it will be auto-ignited upon leakage due to operating temperature.
Extra attention on sealing material/quality is highly suggested.
Graphite packing usually consist of graphite (93 to 99% purities) with bonding agent such as Zinc, PTFE, etc...
Hello,
Not a metallurgist, but I think this is a classic shrinkage related porosity. Have seen several of it.
Since it is already pass the test, in theory there shouldn't be any issue. meaning that the raised face roughness and effective sealing area are still within tolerance.
However if your...
Good day,
Been in valve industry for 20 years, I barely have any experience with Siemens. So cannot say they are bad or good.
It is quite common in certain system and/or skid to buy a bundle of equipment from single source supplier, so let say we buy Flowserve pump, then skid components (valve...
Thanks MJCronin to share this information,
Deepest condolences to the families of the victim.
Very unfortunate and disappointed that similar incidents had happened 5 times within 40 years.
Not really clear to me, but shouldn’t all parties (manufacturer, end user and contractor team...
