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  1. tigwired

    growing tube length

    Metengr Appreciate your input.. Pupping the tubes is the desired approach from my view, client is trying to find a way around it.
  2. tigwired

    growing tube length

    Unfortunatley the batteries are dead..... Tubes are SA210 A1 carbon steel, 2 1/2" OD. MWT is 0.203" Length of stock is 20 feet. Need to grow individual tubes in a tube panel by about 3/8" to meet gap requirements for WPS. Figure we can locally heat the short tubes with a tiger torch or a...
  3. tigwired

    growing tube length

    Does anyone have a procedure for growing the length of a tube to make up for an improper fit (tubes cut to short on a panel)?
  4. tigwired

    what is the correct procedure for UT examination of 1.5 inch pipe weld

    Am having several welds inspected utilizing UT, am wondering if grinding the caps off is the way to go? Should the procedure be straight through inspection or shear wave inspected? Diameters are 20 inch with a 1.5 inch wall thickness.
  5. tigwired

    CSA Z276

    "welded pipe" is a manufacturing process, it does not refer to how the pieces are connected in the field. four types of manufacturing include longitudinally welded pipe, spiral welded pipe, seamless pipe and ERW welded pipe. I believe the clause(s) you are referring to are for welded pipe only...
  6. tigwired

    P91 hardness testing

    stanweld the elbow replications were done on an 8" and 16". the fillet welds (one inch and two inch)which have the high hardness readings has elbows, valves and risers. your statement regarding replacement is the same as the engineering dept has come up with. my main concern at this point in...
  7. tigwired

    P91 hardness testing

    Metengr we cooled the weld to just under 200 F for 45 min after welding sequence and prior to PWHT, the cool down from the preheat of 400 F to 200 F took 1 hour. am wondering if this was adequate in light of your comment about martinsite formation. Is there a recommended cooling time and or...
  8. tigwired

    P91 hardness testing

    Thanks Stanweld I stand in error on the filler material It was ER90S-B9. The Ni and Mn were shown to be < 1.5% The Mn/S were shown to be > 50 The X factor as calcuated from the Bruscato Formula X=(10P+5Sb+4Sn+As) x 100 was shown to be 9.3 The microstructure was taken at weld, HAZ and well...
  9. tigwired

    P91 hardness testing

    Thanks Metengr Actual holding time as recorded on the chart, also a separate test was performed to verify that PWHT equipment was indeed at this temp. results showed it to be within 1 degree F at this temp.
  10. tigwired

    P91 hardness testing

    Metengr hold time for PWHT was 1400 F for 2 hours interpass temps did not exceed 600 F. Agreed that the appearance of the microstructure suggests that it had not been subjected to a proper heat treatment during manufature.
  11. tigwired

    P91 hardness testing

    Thank you for your prompt replies. Here is more info.Hope it is of some help. The lines were a 2” shd 160, and a 1” shd 160. PWHT ramp up at 200F per hour, hold for 2 hours and ramp down at 250 F per hour, had the wrap on until it cooled to 200 F . Microdur was used for hardness test. The...
  12. tigwired

    P91 hardness testing

    Am wondering if anyone can explain why the hardness numbers on a fillet weld of P91 materials would be in the 350 to 400 range(vickers)while the valve is around 200 and the pipe is in the 160 range? The welding procedure was strictly adhered to including the monitoring if interpass temps, PWHT...

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