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  1. Prashanth Markonda

    Tempering issue - - Pipe Size 4”, Sch-120, ASTM A 335 Gr P5

    As per ASTM A 335 Gr P5 min tempering temperature is 675deg.C. Vendor submitted Material Test Certificate with tempering carried out at 750 deg.C. Fluid service - Hot slurry at 300 deg.C Would like to know if the material being proposed by vendor is acceptable or not ?
  2. Prashanth Markonda

    Lateral Tee vs Equal Tee fittings

    Hi, We are fabricating a heavy hydrocarbon drain piping which comprises of fittings viz. Lateral Tee fittings of ASTM A 234 Grade WP5 specification. However, vendor has requested for change in fittings as Lateral Tee fittings are unavailable. He has proposed for Equal Tee fittings. Based on...
  3. Prashanth Markonda

    Specification Long Radius Pipe bends - Radius = 9D

    Thanks. My query is on whether we should consider NPS or OD in the equation Radius = 9 Diameter.
  4. Prashanth Markonda

    Specification Long Radius Pipe bends - Radius = 9D

    Hi, We have requested the vendor to provide 3 INCHES, SCHEDULE 80S ASTM A 312, TP 304H, SMLS, 90 DEG. 9D pipe bends. But vendor has provided 3 INCHES, SCHEDULE 80S ASTM A 312, TP 304H, SMLS, 90 DEG.686 mm radius pipe bends. Can you please explain difference between 9D (as per specification)...

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