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  • Users: Danlap
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  1. Danlap

    Pinhole above bonnet - HF service

    Good day, I was wondering if someone have similar experience with pinhole and maybe have done some root cause analysis. Subject is Monel globe valve for HF service. Fully aware that Monel valves have common challenges such as casting shrinkage or micro porosity which later susceptible to be...
  2. Danlap

    API 6AV1 Class III Sand Slurry testing - ball valve

    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...
  3. Danlap

    Valve World 2024 ideas?

    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.)...
  4. Danlap

    Advise on what type of valve is this

    Good day respected valve practitioners, Does anybody knows what type of valves is this? How does the OS&Y concept for example gland tightening, etc.? Is there any review of its valve performance? How do they did the welding so seamless-ly? Maybe I've been in refinery for too long now :-)...
  5. Danlap

    crooked valve? justified or...

    Good day fellow valve practitioners, We've ordered 2"-600# butt welded gate valves, and received as follow condition (in my opinion is crooked) Is this even allowed or acceptable practice? Reason from manufacturer is as follow quote "This configuration is used on smaller valves to facilitate...
  6. Danlap

    Anybody knows what kind of valve is this?

    Dear respected valve experts, Does anyone knows what kind of valve is this. Seems like there is a drain (nut) at the bottom. Service is condensate class 300#. Is this interchangeable with standard gate or globe? Thank you, Regards, D
  7. Danlap

    adjustable ring on swing check valve disc?

    Good day All, we are overhauling swing type check valve and find out this loose/adjustable ring mounted on the disc, which seems to be the contact ring against the seat. Brand unknown Does anybody knows why this is designed this way? Usually it is just the disc (without the ring) against the...
  8. Danlap

    ASME B16.5 table 8 or 9??

    Good day All, In regards flange thickness (tf as per ASME B16.5), I always refer to Table 8 for class 150#. But without clear explanation, now one of the new vendor had delivered us as per table 9, picture below. Gate valve 1/2" Class 150#, material is WCB, measured upon arrival tf is 8,6 mm...
  9. Danlap

    Eroded stem

    Good day All, Hope everyone are well. Need some advise on how to mitigate gland leakage due to eroded stem on gate valve? Some out of the box (temporary) solution, as this gate valve cannot be removed from the line until 2023. Long story short: 8"-300# slide gate valve located directly under...
  10. Danlap

    What is the background for these valve threshold

    Dear All, There are so many information often taken for granted. Up to this day, I am still puzzled with this two numbers. Appreciate if someone know the background or can elaborate where these numbers were coming from: a.ASME B16.34, and related standards. Flange rating limited to 538oC...
  11. Danlap

    double acting actuator concept w/r pulling force

    Good day fellow valves professionals, May sound like rookie question, but does someone have any idea or a better way to explain for double acting valve concept in terms of how it remains “locked and back-seated”? Below photo is the remaining of spindle for 8”-Class 1500# high rate valve. In the...
  12. Danlap

    One of those days

    Dear All, respected valve professionals, This post may seem contradictive with my previous postings, but I believe that there is some time in our career when we were outnumbered by our non-valve peers and requires “relatively equal” sparing partners to check whether we are still insane. I am...
  13. Danlap

    Gate valve with "thousands" turned

    Dear respected valve practitioner, I have only dealt with a dozen of these kind of (thousands turns) valves, and I am still wondering what was the initial reason for designing valve or gearbox with such “slow” linear movement. Even after being refurbished, a 42”-150# Gate valve (for geothermal...
  14. Danlap

    spindle blow out for check valve and gate valve

    Dear fellow valves practitioners, Would really appreciate some insights over likelihood or possibilities for internal pressure to “push” the stem outside (blowout) for two scenarios a.Common check valve with external hinge pin, however the pin is protruding inside the other side of the body. Is...
  15. Danlap

    isometric abbreviation

    Hi All, Does someone familiar with the abbreviation of WR. S on isometric below? Sometimes WR. S, sometimes WR. E or WR. N and it always pointing to the hand-wheel. Thank you in advance, Regards, MR https://nosuchvalve.com All valves will last for years, except the ones that were poorly...
  16. Danlap

    QSL and welding NDE for pipeline valves

    Dear valve/standard professional, Appreciate shall someone can advise over QSL (API 6D) and welding inspection requirement for pipeline valves. Long story short, circa half year ago my team inquire pipeline metal seated fully welded ball valve 24" with pup piece subject to be buried for 30...
  17. Danlap

    Gland packing lubrication for Naphtha?

    Dear valve/maintenance experts, I have some unit that never completely goes down for the last 30 years. Transferring Naphtha from vessel to other places. Some of this old MOV/valves sometimes stuck and or slightly leaking through gland. For preventive maintenance every 1 year interval, there...
  18. Danlap

    Quick action blind

    Dear All, Would really appreciate some feedback from users with experiences using quick action blind. My team is in the process of replacing 42" flare line - 250 degC spectacle blind + Triple offset butterfly valve configuration with quick action blind + triple offset bv. My biggest concern...
  19. Danlap

    Globe valve mental model

    Dear valve experts, I am in the process of Globe valve failure investigation, process crude oil: circa 200 degC, pressure circa 20 barg, which was relatively new (1 year), used as bypass valve for same size Control valve. Long story short the Control valve blocked and damage, so we use the...
  20. Danlap

    TOBV machining "abnormalities"

    Dear fellow Valve practitioner, Appreciate some insights for below abnormalities, what would be the worst case (long term) scenario that potentially occurs. TOBV manufacturer defend its due to the machining "abnormalities" for creating one side tappered and the opposite side relatively...

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