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  • Users: Pickaspot
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  1. Pickaspot

    1/2" diameter WPQ qualified with Volumetric NDE

    ASME Section IX QW-452.1 Thickness of weld metal qualified Production application 1/2" NPS (.840" OD) schedule 80 (.147" wall)open butt groove weld (GTAW out)P4 to P8. WPQ qualified with volumetric NDE, welder produced 3qty. 1/2" schedule 80 coupons meeting the 6" (QW-302.2)section IX...
  2. Pickaspot

    PQR hardness P5A to Incoloy Alloy 800HT

    B31.3 code Reviewing my PQR lab results I have some concern in regards to the hardness results in the P5A HAZ. The highest Vickers(HV) reading was 284 this is with no PWHT being performed. I referred to the toughness test results and referenced B31.3 to which they are acceptable. I selected...
  3. Pickaspot

    PQR P4 to P8 questions?

    The application this will be used for in the field is a steam line with a design temp of 869F and design pressure of 769 psig. The weld's are open butt on 1/2" diameter SA-335 P-11 to SA-312(316)both having a wall thickness of 0.147" The engineering spec requires that max hardness not exceed...

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