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  1. ET1983

    Spiral Wound Gaskets for Thin Wall pipes against ASME B16.20 Table SW-2.5-2 & SW-2.5-1

    Pipers,,,Can you throw some light to the query??
  2. ET1983

    Spiral Wound Gaskets for Thin Wall pipes against ASME B16.20 Table SW-2.5-2 & SW-2.5-1

    Dear Pipers, Came across a request from 'End-User' to the use of 'Spiral Wound Gaskets with Inner Ring_ASME B16.20' in place of existing 'Flat Ring Gaskets_ASME B16.21'. It was briefed on the limitations for the use of "Spiral Wound Gaskets with Inner Ring_ASME B16.20" to thin wall pipes, in...
  3. ET1983

    PWHT requriement on Cast Valve bodies

    Dear All, Have come across a query on the need for PWHT on cast body. Need your expert opinion.!!! However, as per code requirements and per specific client needs, any cast imperfections with weld repairs (or) structural welding of any cast valve component that will be in contact with sour...
  4. ET1983

    Hot Tap on Elbow

    Have a scenario, where I had to weld a 2" piping connection (through HOT TAP) on to an 24" A234-W elbow, oriented in skewed direction, i.e., elbow rotated in 2 plane. would like to explore the feasibility of executing hot tap of 2" connection anywhere in the surface of the elbow or is there a...
  5. ET1983

    Application of ASTM A20 requirements for testing of ASTM A516 plates

    Hi mike, as far as my understanding.. all ASTM A516 plate materials shall be UT tested in accordance with A578 for identification of discontinuity or cracks in the plate material. If ASTM A20 is not applicable for heat treated plates ( normalized) as indicated in section 1.4, then my question is...
  6. ET1983

    Application of ASTM A20 requirements for testing of ASTM A516 plates

    My query is all about the interpretation of section 1.4.. my understanding on this section,is that the normalized plated or heat treated plates wouldn’t be tested or complying to general requirements in accordance with ASTM A20?? If so, how to determine the UT acceptance level for a material or...
  7. ET1983

    Application of ASTM A20 requirements for testing of ASTM A516 plates

    Dear All, During my review of an material test certificate of A516 Gr70 plate material,the supplier has qualified the UT testing of a plate to level B. I raised a query of why not qualified for level C, which is the stringent one and as required by ASTM A20 requirement also. However received an...
  8. ET1983

    100% radiography requirement on 150# Cast steel butterfly valve

    Thanks for your replies. It really means a lot.
  9. ET1983

    100% radiography requirement on 150# Cast steel butterfly valve

    Does 100% radiography a mandatory requirement for standard class valves, 150 LB fire water service valve with cast steel body?? As per ASME B16.34, it states that, radiography is a mandatory requirement for Special class valves, so, can we interpret this statement that, no radiography is...
  10. ET1983

    Dear All, I came across a clarif

    Thanks MickMc, I completely Agree to you on the stand that, the thread will in no way be in contact with the service fluid, however, the TEFLON tape which is winded on to the threaded joints (Normal Industrial Practice), will that itself be a good corrosion resistant??? [bigears]
  11. ET1983

    Dear All, I came across a clarif

    MickMc Thanks. Is there any other way, other than changing the material of the plug, we can resist the corrosion on the thread of the plug.??probably, any corrosion resistant tape would work here>>
  12. ET1983

    Dear All, I came across a clarif

    Dear All, I came across a clarification / query on one of the Y-type strainer used for the seawater services. The thing is, the body of the strainer is Cast steel with internal EPOXY coating to protect from corrosion, as the service is seawater. but the drain plug on the strainer, which is...
  13. ET1983

    Provision of Extended Stem to a ball valve in operating condition_Retrofit

    Dear donf & zdas04,gerhardl, Thanks for your excellent suggestions and answers. First time i am hearing about this Remote valve Operator, and it seems to be an apt answer to my case. Will get into touch with these experts and will share with you the informations. Thanks
  14. ET1983

    Provision of Extended Stem to a ball valve in operating condition_Retrofit

    Dear All, I had been through a case where, the 6" ball valve, trunnion mounted was erected with gear operator. But, after the commissioning, the operation team of the plant is asking for valve access from the platform located 1.5 meters above. Even the provision of platform is very difficult to...
  15. ET1983

    Selection of seat material based on Operating or design temperature.

    Thanks to moltenmetal and Danlap to share their knowledge and experience.
  16. ET1983

    Selection of seat material based on Operating or design temperature.

    Thanks all for the inputs. However, i have seen cases where the design temperature is around 200+ deg celcius and the operating is somewhat around 120-130 deg celcius for sour service environment, where they look for tight seal. As we all know that, Soft seals give better sealing than the Metal...
  17. ET1983

    Selection of seat material based on Operating or design temperature.

    Dear all, I know that, many threads explain about the selection of seat material and its pressure and temperature ranges for specific fluid services. Also many vendor charts show the Seat material specifications and its limitations with respect to the pressure and temperature. However, my...
  18. ET1983

    Necessity of Fire Test Requirement for Metal Seated Valves

    Hi all, In one of our projects, we requested to VENDOR for a Fire test Certificate for the Metal seated check valves. But the VENDOR replied that, metal seated valves are intrinisically fire safe and no fire test is applicable. But when i had gone through the API 6FA / ISO 10497, they mention...
  19. ET1983

    PTFE / Teflon body seals on ball valves

    Hi, The selection of seal materials for ball valves shall be based on actual maximum and minimum operating temperatures of the valves, pressure fluid composition and chemical product used. And it is not based on the Line class pressure / temperature design conditions. ET
  20. ET1983

    Design Life factor for the New Pipe ?

    Thanks to Little inch, Bimr for the brainstorming explanations... going thru the API RP 581 for more informations... Thanks.

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