8/12/2019 Fab Tolerance

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** Given underneath is a gist of the FABRICATION TOLERANCE rules taken from

AI R !A and AI !B CO"E#$ This is for %ui&k referen&e onl'$ lease refer the a&tual

rule for the &om(lete (i&ture$

FABRICATION TOLERANCE# ) AIR!A +"e&em,er !---.

#e&$ //$/$0 B ) 1a&ket and "e&k se&tion &olumns

- In any plane, field assembly tolerance at Top of Jacket & bottom of deck column, for

CL (central line) of column to CL of adjacent column : - !" mm

- #t all deck le$els, CL to CL of t%o columns : - ! mm

- In ot'er jacket planes : - ! mm

- ia*onals of a rectan*ular plan layout + ! mm

- trai*'tness of jacket columns + !" mm, but, not . mm in any m len*t'

- Top of all jacket column /le$ation : - ! mm

- Locations of ends of 'ea$y %alled 0 jacket cans or deck le* joint cans : - 12 mm

- C'an*e in locations due to c'an*e in %all t'ickness in jacket le*s or deck columns : +

2! mm

//$/$0$C ) 1a&ket and "e&k Ere&tion Bra&ing

- all braces in a 'ori3ontal plane s'ould be 'eld $ertically %it'in ! mm

- location c'an*es due to %all t'ickness c'an*e in brace : - 12 mm

- all bracin*s (end point dimensioned) : - ! mm of planned dimension

//$/$0$" ) "e&k Beams

- on central line of deck beam, bet%een ends : - ! mm

- at no point on C4L, beam %ill be out of line more t'an ! mm 'ori3ontally or ! mm

$ertically

//$/$0$F ) Grating : joint in *ratin* at point of support only4

//$/$0$G ) Fen&ing 2 3and rails : top of rail %ill be strai*'t and le$el to t'e eye

//$/$0$3 ) Landing 2 #tairs

- location, 'ori3ontally : %it'in 56 mm

//$/$0$/ iles

- minimum 7ile piece len*t' : ! m or one pipe diameter, %'ic' e$er is less

- lon* seam of t%o adjacent piles : min " de*ree apart (89C need : !;" de*ree)

- ma )

- C'eck strai*'tness by taut %ire, at minimum radius points

- ?oot face of be$els : not out of s@uare 2 mm per ! m, ma

8/12/2019 Fab Tolerance

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5$/$5 B ) 1a&ket orientationde$iation after installation : 2 de*ree in eit'er direction

TOLERANCE# A# ER AI 6 !B +1anuar' !--!. )

0$7 - ?adial offset of a,utting edgesof lon* %eld seam - not more t'an ! >; inc'

- lon*itudinal %eld seam of adjacent cans : " de*ree apart

0$0 Girth 8eld

- ?adial offset of abuttin* ed*es of *irt' seam 0 not *reater t'an "41 = %all t'ickness,

but ! >B inc' ma ; inc' ma t + ! : ; ratio

- for diameter . B; inc', ma!6 inc' : need not be remo$ed- ?epair of defects, deeper t'an 1" D of FtG or len*t' > %idt' . 1" D nominal

diameter : not permitted in fabrication4