ML18018A819
| ML18018A819 | |
| Person / Time | |
|---|---|
| Site: | Harris  |
| Issue date: | 05/04/1973 |
| From: | SOUTHWEST FABRICATING & WELDING CO. (SUBS. OF IU |
| To: | |
| Shared Package | |
| ML18018A805 | List: |
| References | |
| 4-108, NUDOCS 8310130289 | |
| Download: ML18018A819 (7) | |
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HOT BENDING OF CARBON STEEL AND PERRITIC N.MYS PAGE 1
OF DATE 4-30-73 1
Pipe shall be selected oo that the minimum vali thickness aftez bending triII bc not less than the calculated minimum va11 thfckness required for straight pipe.'.
Welded plate pipe chall have the longitudinal scam on the aeutzal axis of thc bead 3.
The centerline radius of a bend viII aot normally be less than five {5) times the nomiaal pipe dfameter and shall not be leos than permitted by Figure 2 in PFI Standard ES-3.
4.
Thc pipe shall be packed Wth diy sand aad the ends plugged prior to hcatfng.
S.
The area of the pipe to be beat shall be unfformly booted to a temperature aot exceeding 2100 F.
Beading shall be completed between I650o aad 2000 F.
So bending or forming sha11 be performed at a temperature lees than 1650oF or greater thaa 2000oF..
The temperature shall be.determined.by
- a. surface thermocouple.or..by aa optical pyrometer.
6.
Beading methods aad controls shall be such that the difference betvcen the maximum and mfafmum diameter at any cross section of the bead shall not exceed 8X of the average measured outside dfameter of the straight portion of the pfpe.
I 7.
Buckling shall be kept to aa absolute mfnfmum aad shall aot exceed the lfmfts specfifed fa PFI Staadard ES-3 aad outlined helens:
a)
The maximum vertical height of any wave, measured from the avezage height of tvo ad fofnfag crests to the valley, shall not exceed 3L of thc aomfaal pipe sfse.
~ 4 b)
Thc mfnfmum ratfo of the distance betveen crests as compared to the height between crests aad the included valley ohall be 12 to 1.
'c)
Suckles excecdfng the Ifmfts defined in a) and b) above ohall aot be repaired without approval of the Manager of galfty Assurance.
8.
Qherc surface checking is ovident, it shall be removed by grinding aad the grouad surface shall be examined using an approved liquid penetrant oz'agnetic particle procedure.
9.
Fcrrftic alloy bends shall be stress relieved.
REVtSION BY DATE APPROV ED
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,". FABRICATlNG NVVLMVllhIiyo e avv HOT BENDING OF CARBON STEEL AND PERRETIC hLLOTS rAGE 1
OF 1
DATE 3-26-74 SUPPLEMENT Ol
- 8. 0.
3301 thru 3304 Change Paragraph 03 to read:
3.
We centerline radius of a bend shall not be less than five (5) times the nominal pipe diameter.
Ch'ange Paragraph f6 to read:
6.
Bending methods and controls shall be such that the difference betMeen the maximum and minimum diameter at any cross section to the bend shall not exceed 6X
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of the average measured outside diameter of the straight portion of the pipe or tvo inches (2")
whichever is greater.
i Change Paragraph 7 (a) to read:
7.
a)
The maximum vertical height of any vave, measured from the average height of evo ad)oining crests to the valley, shall not exceed 3/8" in depth over a 12" length.
Change Paragraph 09 to read:
l 9.
All hot bendy shall ke stress relieve.~
kr.9 D~lebed 8> SWC'Cu Aekfc~ 5-ZS-SO-Aflptuvmcf By EbaL~o 9-l 0,
4'PA hpproved:
REVISION BY DATE
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I ELiH4t Dear Mrs Fefgonbauoe
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P.OS Ã1'-495M5 Shcaron )tarrta tluclcnr Power Nant
$.0t 3301 thzu 3)08 and 4121 Qiru 4128 Qpttg flite )eater
@$ 11 confirm our tclephono eonvcroatfon todayt 4"cHAseap Supplement Ol to South>eat I'roccdure )/o.
4 l08 (0) vhfch haa been opprnvcd by Ebaaco chan/ca tarag,raph 9 to read 'M,l hot benda ohall be atrcae volicvcdt" g ggr;
$ $ nco this Ca no 1onf,cr a apfcif5cat5on requ5rcnent ier ckkghot bendos you hsvo agreed to author5ao ur to delete 1'arograph 09 froc Supplement 01 and include any rcquix~nt for heat treating, bcp4e on'Qie face of our dcta51 ohcct.
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7'lcoec ochnoMlcdpa, your concurrcncc v5th tls5a letter by oigntng in the apace provtded below and rctusn5ng a 05gncd ccpy for our Cilca.
Youra very truly, P 05oct Banapscr JQl!jh
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SO FAHRICAilNG HOT BENDIHC OF CARBON STEEL k%) FERRITXC hLLtKS
)(), (I SUPPI =MENT 01 S.
O. 3301 thru 330k Change Pax~raph 03 to read:
3.
The centerline radius of a bend shall not be less than five (5) times the nominal pipe diameter.
Paragraph à to read:
Bending methods and controls shall be such that the difference between the muamua and minimum diameter at any cross section to the bend shall not ezceed 6Z of the average measured outside diameter of the straight portion of the pipe or evo inches (2")
whichever is greater.
Change Paragraph 7 (a) to rend:
a)
The auxfaum vertical height of any wave, measured from the average height of evo ad)oining crests to the valley, sha11 not exceed 3/8" in depth over a 12" length.
Change Paragraph 09 to read:
- 9. All hot bends shall be stress relieved.
hpproved:
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REVISION BY DATE APPROVED
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