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  1. Erkamal

    UNS G41300 ( IN ASME)

    Dear Friends, Thx for your reply. Client wants API 6A design code for choke but wants to use 4130 material for forged body & bonnet. I can use API 6A annex G for high temp. design but I am not sure that i can use 4130 material for ASME B16.5 flange. Kemlesh
  2. Erkamal

    UNS G41300 ( IN ASME)

    HI Friends, one of client is requesting to use AISI4130 for valve body & bonnet. Temperature is high as 200 Deg C. I have checked B16.5 for flange but I could not found AISI4130 material for use of flange. is it acceptable to use AISI4130 material ? and where can i find those point for refer.
  3. Erkamal

    Tungsten carbide Grade

    Hi Edstainless, Great Thx. it is good information for me. just one question that all those grade has been followed by any international standard? Like ASTM or other....? Kamlesh
  4. Erkamal

    Tungsten carbide Grade

    HI Friends, I am working in choke valve industry. Mostly , tungsten carbide has been used for choke valve trim. Is there any international standard for tungsten carbide's different grades in which i can found chemical as well as mechanical properties. Kamlesh
  5. Erkamal

    Angle type choke

    Thx Lot Sir.
  6. Erkamal

    Angle type choke

    Hi Friends, I am seeing that mostly choke valve which has been used on wellhead are angle type body choke valve. Is there any benefit to use angle type choke body for choke valve design?
  7. Erkamal

    AISI 316 yield strength

    Dear All, Is it possible to increase yield strength up to 60K by heat treatment of AISI316 material?
  8. Erkamal

    Impact test on Tungsten carbide material .

    Dear Friends, I am aware about physical properties of Tungsten carbide like Hardness, density , T.R.S, porosity , Fracture toughness. But My one client is asking about Impact result and one condition is that 400 j impact value of Tungsten parts. I am not aware and never face impact test of...
  9. Erkamal

    Physical property of AISI 4130

    Dear Friends, i have taken reference of ASTM 29/ ASTM 434 & DIN 1.7218 for AISI 4130 In DIN 1.7218 , i have got chemical & physical property both In ASTM A29, i have got chemical property & ASTM A434 , i have got physical property. But My question is that In all above standard , They have...
  10. Erkamal

    Tapered size calcualtion for stem choke valve

    Hi frd, My one of client has given process data and choke valve size, flow rate, pressure drop,temp for four different flow rate, pressure drop , temp. condition. I have got CV from above data . But they wrote that " Please provide Tapered size calculation in graphical and tabular format...
  11. Erkamal

    Graphoil stem seal fail

    Thank you friends. I used Graphoil stem seal in one of Globe valve with 10000 PSI. But at the stage of proto type of Globe valve. valve stem has been jammed. it was because of much force on Graphoil stem seal. and if i m going to loose force, leakage has been started. SO i do not know what...
  12. Erkamal

    Check valve

    Hi Friend, Thx for giving your valuable comments. Dear JBECKHOU, i m not sure PEEK seal will work at high pressure. it will be gone after few months of use of check valve. I have attached figure here. almost all thing improve.but i could not judge that how can prevent the leakage at low...
  13. Erkamal

    Check valve

    HI Israelkk, Agree with your comments. yes. Peek seal will not work at high pressure. Metal to metal seal should be. I am working on check valve which is spring loaded and metal to metal seal. i am modifying some parts . now it is good to prevent on leakage at high pressure & little on low...
  14. Erkamal

    Check valve

    HI Israeikk, Great thanks for your valuable replies.really countable
  15. Erkamal

    Check valve

    Dear Sir, In my above question , I said . it is working well at high pressure. only fail at low pressure seat test. On my view , it should be work. but i can not judge that it is working well on high pressure & do not work on low pressure. so what is the possibility for failing at lower...
  16. Erkamal

    Check valve

    Dear Friends, I have design one check valve for 10000 PSI . it is really going good at high pressure. but it is failed at low pressure seat test. I have used high compressive spring also for giving force towards to seat but still it is not working. Any one have idea that what is going...
  17. Erkamal

    Graphoil stem seal fail

    HI friends, i am using PTFE lip stem seal for 5000 psi. But i have made new globe valve for high temperature at pressure 10000 PSI but it is going to fail and leakage. when i am applying more force on seal. more friction has been generated between seal surface and stem surface. and it is...
  18. Erkamal

    AISI 4130

    Hi Yudhichen, Fully agree with you. API 6A has not given AISI4130 but it has given that which alloy should be in alloy steel. In APi 6A , Vanadium is allowed for alloy steel & AISI 4130 is alloy steel. so it is ok. But in ASTm A29 , vanadium is not in AISI 4130 .so little worry that i should...
  19. Erkamal

    AISI 4130

    Thank you very much . i will count your information and will check again. i have not idea that what effect will come when vanadium is going to add in AIS4130. i will see it more.
  20. Erkamal

    AISI 4130

    Dear Friend, I am working in API 6A valve industry. I have got AISI 4130 certificate. As per ASTM A29, vanadium is not there in AISI 4130 chemical compostion. My material supplier has added 0.002 % vanadium in AISI 4130. his argumentis that AS per API 6A/5.4.5.2 Composition limit. -PSL 2...

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