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  1. abdolmaleki1975

    SPLIT TEE

    Dear GD2, The preheat temperature is 100 degrees Celsius and the inter pass temperature is 250 degrees. The natural gas fluid is methane in the gas transmission system with a pressure of 1050 psi Of course, I think there is no need for heat treatment due to the conditions of thickness and fluid...
  2. abdolmaleki1975

    SPLIT TEE

    Dear LittleInch, The thickness of the 40 inch split T's body is and with material x 65 , is equal to 20 mm, and when the same material is extruded, the thickness of 16 inches is reduced to 15 mm on the branching side. Also, the material and thickness of the existing pipeline is 40 inches...
  3. abdolmaleki1975

    SPLIT TEE

    Sorry, friends, maybe I didn't express my meaning correctly, where I work, the material is not easily available, and most of the time, the manufacturers or sellers determine the conditions. so even though I know all the things related to the design , but the material should be based on the...
  4. abdolmaleki1975

    SPLIT TEE

    Yes, you are right, the thickness of the flange is calculated and thicker, the only limitation is the diameter of the hot tap drill. Because the higher thickness of the flange reduces the inner diameter. Other friends, I would be grateful if you would not spare me your valuable comments. Thank...
  5. abdolmaleki1975

    SPLIT TEE

    Hello LittleInch I know what Split T is and I have currently ordered two of them from a manufacturer, the first one is a Split Tee 40 to 16 inches and my order was to use f 52 flange, but the manufacturer suggested a 105 flange. In addition, the data presented in the w p s used the e 70s filler...
  6. abdolmaleki1975

    SPLIT TEE

    Hello dear friends and experts; I have a few questions about Split Tee First, if the material of the main pipe body (pipeline) is API.5L.X60, can A 516 GR.70 sheet be used to make the split tee body? (of course calculated with a higher thickness) Second, for the split tee with the size of 40x16...
  7. abdolmaleki1975

    Mss standard compared to astm a860 wphy 52 standard

    Dear SJones; Thank you very much for your kind comment, dear colleague
  8. abdolmaleki1975

    Mss standard compared to astm a860 wphy 52 standard

    Dear GD2; Hello A seller uses the mss standard instead of the astm standard in his technical offer, claiming that there is no difference other than the difference in the amount of manganese, and demands that we accept his offer. So my question is clearly whether it is acceptable without...
  9. abdolmaleki1975

    Mss standard compared to astm a860 wphy 52 standard

    Hello Can the mss standard replace the astm a860 standard for a 16-inch tee as the base material standard?
  10. abdolmaleki1975

    Distance between blowdown stacks in gas pressure boosting facilities

    Yes Sir,[smile] They have been operating the pipeline for 50 years, so they know their job. I mean, we do not create a new stack for the new blowdown and instead join the existing stack on a part of the route(As a jacket). Do you think this idea is acceptable?
  11. abdolmaleki1975

    Distance between blowdown stacks in gas pressure boosting facilities

    Thank you 1503-44, But this is with the operators and they know what they are doing. I just have to consider the possibilities in the design. I was wondering if it was possible to use a 24-inch pipe, for example, as a jacket pipe on an existing 16-inch pipe(If we consider the existing 16-inch...
  12. abdolmaleki1975

    Distance between blowdown stacks in gas pressure boosting facilities

    Dear 1503-44, We have also installed two plug valves on the 16" lines that comes from the pipelines, but sometimes it is possible that exactly when the workers are working on this line and this valves are open, the return of the gas will cause dangers. or maybe those valves in the form of They...
  13. abdolmaleki1975

    Distance between blowdown stacks in gas pressure boosting facilities

    Hello dear friends Is it permissible for me to use a check valve(to prevent gas from returning to the pipeline and to protect workers while working) even to use an existing stack for two purposes?
  14. abdolmaleki1975

    Distance between blowdown stacks in gas pressure boosting facilities

    Dear GD2, Thank you very much for your attention It can be said that the dispersion/radiation model study should be done by which discipline? With best regards
  15. abdolmaleki1975

    Distance between blowdown stacks in gas pressure boosting facilities

    Hello dear LittleInch, The problem is that we are in an urban area and it is not possible to buy extra land. Also, the problem of the prevailing wind is another reason. The only safe area I can use is the area inside the attached photo, which unfortunately already has two more stacks in place...
  16. abdolmaleki1975

    Distance between blowdown stacks in gas pressure boosting facilities

    Dear 1503-44, Thank you very much for your attention But our problem is how far the new blowdown stack is from the two existing blowdown stacks. And that the new blowdown stack is only designed to connect to the compressor station ESD system. So forget the process design of valves and pipeline...
  17. abdolmaleki1975

    Distance between blowdown stacks in gas pressure boosting facilities

    Dear georgeverghese, This plant is not a gas refinery but a gas booster facility During time Pigging,I think that the gas flows out of the existing stacks with full flow and the flow is not dead or low. By the way, this explanation is in response to my dear friend LittleInch I thank and...
  18. abdolmaleki1975

    Distance between blowdown stacks in gas pressure boosting facilities

    Thanks to my good friends LittleInch and 1503-44, Unfortunately, I have not yet found the answer to the problem, but I am trying It should be noted that the flow in the existing stacks that come from the pipelines is planned and is done in the time of pigging is a full flow. And the flow in the...
  19. abdolmaleki1975

    Distance between blowdown stacks in gas pressure boosting facilities

    Dear 1503-44, I want to specify the location of the new stack according to the existence of two existing stacks I mean, I want to know what the safe distance should be from these two dear stacks[smile] And also about the height of the new stack, how high it can be. It should be noted that the...
  20. abdolmaleki1975

    Distance between blowdown stacks in gas pressure boosting facilities

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