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  • Users: wcw1985
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  1. wcw1985

    Weird Surface Defect (Honeycomb like)

    Dear All, Can anyone tell me what kind of defect as per picture attached? It appears on the material after we performed welding. The material is SA312 TP304L pipe weld to a SA182 F304L Flange...
  2. wcw1985

    RT1 or RT4

    Dear forum member, I have a pressure vessel, one of the circumference seam is considered as Type 3 joint as per table UW-12. (Because we can't inspect the internal quality of the weld) If i do 100% radiography on all the joint, can the vessel be categorised as RT1? Regards, Wcw
  3. wcw1985

    ASME B16.5 Flange DN550 / NPS 22

    Dear all forum member, Can anyone enlighten me, why is it B16.5 do not have flange size of 22" ? I try to read through the B16.5 but still catch no ball. Thanks in advance. Regards, Wcw
  4. wcw1985

    Foundation bolt length using pvelite

    Dear All member, I have a question about foundation bolt,I just started to use pvelite software, i notice that i could only calculate the bolt size required for the foundation bolt using pvelite, can any member tell me that is there a way to know the length of the foundation bolt required? I...
  5. wcw1985

    ASME code section II Part A Ordering Information

    Dear Forum member, I have 1 queries about the ordering information as per asme II when i order a pipe (SA 106 Gr.B) Under ASME II Part A (3.1.12) End Use of material. Does this clause means that i have to state the reason i buy the pipe in my ordering information? Thanks in advance for...
  6. wcw1985

    Swing Bolt Closure

    Dear all, I saw a lot of swing bolt closure (design based on asme Sec8 Div.1 code) vessel in the internet, i was curious and would like to know which code in asme sec8 div1 shows the design of swing bolt closure? What i read from asme sec8 div1 is UG-35.2 (a)(1) Closure of the swing bolts are...
  7. wcw1985

    Large Diameter Flange with small hub thickness vs thick pipe

    Hi All, I encounter a question which would like to discuss. I have a vessel, OD 46"(1168.4mm), have one side SE2:1 dish head another side end with large diameter WNRF #300 flange (46") with blind as a manhole. Design Pressure: 50 bar Design Temp: 50 degC Shell using 1"(25.4mm) Boiler Plate...
  8. wcw1985

    ER308L vs ER308LSi

    Dear All, May i know when i qualify a WPS using consumable ER308L, is it in the future my WPS can use ER308LSI consumable as well? Does the Si will require make me to requalify a new WPS? Thanks in advance for reply. Regards, wcw
  9. wcw1985

    Clamp Meter For WPS

    Hi All, I am currently in dilemma in selecting the correct clamp meter for AC&DC. Option 1) with True RMS feature Option 2) without True RMS feature The purpose of this clamp meter is for me to use it during WPS qualification of GTAW,SMAW and FCAW. Does any of the option above will affect...
  10. wcw1985

    R134a consider as lethal?

    Dear forum member, I would like to ask is R134a consider as lethal substance? I read UW-2 stating that lethal substance is gas or liquids that in nature that very small amount of gas or vapor that inhaled by human can be dangerous to life. How to measure the "small amount" in the sentence? Is...
  11. wcw1985

    SA19X For Flat Washer

    Dear All Forum Member, Can someone point me out what is the material code section 2 part A for the flat washer? I used to know A193 B7,B8,B8M for bolts, A194 2H,8,8M for nuts, but i don't know what is the code for flat washer[ponder].. Thanks for help.
  12. wcw1985

    PWHT for head or whole vessel

    Dear forum member, I have a vessel which the thickness for sa516 gr70 shell ID 660.4mm: 18mmt Torispherical head: 25mmt After calculation, my dish head elongation is about 24% which (>5% need to be pwht). So i need to do pwht, my question is can i just heat treat the head(consider as stress...
  13. wcw1985

    Ducting thickness calculation suitability

    Dear All, Is it appropriate to use UG-27 to calculate the thickness of a ducting project? Our client require us to verify the thickness of the ducting to make sure that the thickness is enough to withstand the internal pressure of the ducting. I have some weird feeling to use ASME Section VIII...
  14. wcw1985

    Weld Flange To Dish Head Directly

    Dear All, I have 1 question which cannot be solve and would like to ask for dear forum members's opinions: Design condition: Internal pressure : 10 bar Torispherical Dish Head: OD1300mm ( around 51") SORF 20" Flange Ansi 150 -->OD about 700mm (27.5") I would like to open an opening in...

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