WORK INSTRUCTION FOR CORRECTION OF FLANGES SERRATION
DOCUMENT NO. DDEL/WI/SEF/001 Rev-00
DEE DEVELOPMENT ENGINEERS LIMITED
00
29.09.16
Initial Isse
RE*.
D!+E
DES,RIP+IN
!c"int#a $% Sa&ant a PREP!RED ! !N!)ER3
!'a# (&a% )oel !PPR-*ED !/, E!D3
D-,5EN+ RE*ISI-NS
!,,EP+ED
WORK INSTRUCTION DEE DEVELO PMENT ENGINE ERS LTD
CORRECTION OF FLANGES SERRATION
Doc No.
DDEL/WI/SEF/001
Rev. Date
00 29.09.16
Page
Page 2 of 4
INDEX
1. SCOPE 2. REFERENCE STANDARD 3. . !. ".
RESPONSIBILITY ASSESSING IMPERFECTIONS ON FLANGE SERRATION RE-SERRATION PROCEDURE ACCEPTANCE OF FLANGE SERRATIONS
WORK INSTRUCTION DEE DEVELO PMENT ENGINE ERS LTD
1.
CORRECTION OF FLANGES SERRATION
Doc No.
DDEL/WI/SEF/001
Rev. Date
00 29.09.16
Page
Page of 4
SCOPE#
!ssess t"e i&7e%fections on %aise8 face anges an8 ca%%#ing ot co%%ection of se%%ation :# t"is 7%oce8%e. $.
REFERENCE STANDARD#
!SE 16.; !SE 16.4< 3.
RESPONSIBILITY#
+"e ons of 8etecting i&7e%fection an8 %e7ai%ing t"ose lies =it" P%o8ction enginee% an8 , enginee% assigne8 to t"e 7%o'ect. .
ASSESSING IMPERFECTIONS ON FLANGE SERRATION
4.1 Pe%&issi:le i&7e%fections as 7e% NPS a%e to :e %efe%%e8 f%o& +a:le > clase <. an8 <.4 of !SE 16.; an8 +a:le 0> clase <.1 an8 <.2. -f !SE 16.4<. 4.2 I&7e%fections s"all :e se7a%ate8 :# a 8istance of at least 4 ti&es t"e &a?i&& %a8ial 7%o'ection. I&7e%fections less t"an "alf t"e 8e7t" of se%%ations s"all not :e consi8e%e8 case fo% co%%ections. 4. Da&age if an# i8enti@e8 s"all :e &a%$e8 7"otog%a7"e8 an8 8oc&ente8 in ins7ection %e7o%t / N,. 4.4 e#on8 t"e acce7tance li&its state8 a:ove> ange facing s"all :e %eAse%%ate8 as 7e% t"is 7%oce8%e. !.
RE-SERRATION PROCEDURE
!ssessing ="et"e% t"e ange facing can :e &ac"ine8 o% notB ;.1 ReAse%%ation :# &ac"ining of %aise8 face a3 ,"ec$ing of Raise8 face "eig"t :3 If t"e t"ic$ness of %aise8 face is &o%e t"an acce7ta:le li&it as 7e% stan8a%8 %eCi%e&ent t"en %aise8 face s"all :e %etoole8 7 to 8e7t" of t"e i&7e%fection an8 %eAse%%ate8 as 7e% t"e stan8a%8. c3 If t"e t"ic$ness of %aise8 face is not a8eCate to %e&ove t"e i&7e%fection an8 &a$ing t"e se%%ation t"en t"e follo=ing 7%ocess s"all :e follo=e8BA ;.2 ac"ining of ange t"ic$ness to inc%ease t"e "eig"t of %aise8 face a3 eas%e t"e t"ic$ness of ange t"ic$ness B If t"e t"ic$ness of ange t"ic$ness is &o%e t"an t"e acce7ta:le li&it as 7e% stan8a%8 %eCi%e&ent t"en &ac"ining t"e t"ic$ness of t"e ange t"ic$ness to inc%ease t"e "eig"t of t"e %aise8 face 7 to ce%tain li&it ="ic" is %eCi%e8 to %e&ove t"e i&7e%fection an8 %eA se%%ate8 t"e %aise8 face. ;. Re7ai% :# =el8ing a3 In %e7ai%ing a ange face> it &a# :e necessa%# to se =el8 &etal to eit"e% @ll a local a%ea fo% e?a&7le> a goge o% a sc%atc"3 o% to =el8 :il8 7 t"e :ase &etal o% e?isting =el8 ove%la# face. :3 W"e%e t"e ange is to :e %e7ai%e8 :# =el8ing> t"e a%ea ="e%e t"e :il8A7 is to :e a77lie8 s"all :e f%ee of an# %esi8e> co%%osion 8e7osits> etc.> t"at =ol8
WORK INSTRUCTION DEE DEVELO PMENT ENGINE ERS LTD
c3
83 e3
f3 g3 "3 i3
'3
"
CORRECTION OF FLANGES SERRATION
Doc No.
DDEL/WI/SEF/001
Rev. Date
00 29.09.16
Page
Page 4 of 4
n8l# aect t"e =el8. ,leaning &a# :e :# &ec"anical o% c"e&ical 7%oce8%es !%ea to :e %e7ai%e8 s"all :e e?a&ine8 7%io% to 7e%fo%&ing t"e =el8 :il8 7 sing an a77%o7%iate NDE &et"o8 to 8ete%&ine t"e integ%it# of t"e :ase &etal. Wel8ing 7%oce8%es an8 =el8e% Cali@cations s"all co&7l# =it" t"e %eCi%e&ents of !SE section I. +"e @lle% &etal> =el8ing tec"niCe> =el8e% Cali@cations> an8 "eat t%eat&ent if an#3 s"all :e selecte8 to &eet se%vice an8 &etall%gical %eCi%e&ents 7ost =el8 "eat t%eat&ent s"all :e 7e%fo%&e8 7%io% to ange face &ac"ining if %eCi%e8 :# an a77lica:le ne= const%ction o% 7ostAconst%ction co8e Post =el8 "eat t%eat&ent is not %eCi%e8 if t"e t"ic$ness of t"e =el8 &etal :il8 7 is less t"an t"e &a?i&& allo=a:le @llet =el8 t"%oat t"ic$ness Post =el8 "eat t%eat&ent s"ol8 also :e ca%%ie8 ot ="e%e se%vice /7%ocess %eCi%e&ents 8ictate. +"e @nis"e8 &ac"ine8 s%face s"all also :e e?a&ine8 :# + o% P+> an8 i&7e%fections in e?cess of t"e stan8a%8 a77lica:le to ne= anges> o% as s7eci@e8 :# t"e se%> s"all :e %e7ai%e8 an8 %eAe?a&ine8 :# t"e &et"o8 t"at 8iscove%e8 t"e i&7e%fection. !fte% co&7letion of a:ove activities> t"e ange face s"all :e s:'ecte8 to &ac"ining an8 %eAse%%ate8 as 7e% stan8a%8 %eCi%e&ents.
ACCEPTANCE OF FLANGE SERRATIONS
6.1 +"e ange facing is ins7ecte8 visall# an8 se%%ation is &eas%e8 to Rog"ness ave%age Ra stan8a%8s. +"e stan8a%8 Ra is 12;A2;0 &ic%ons. 6.2 5n8e%At"ic$ness of a %aise8 face 8e to %e@nis"ing s"all :e acce7ta:le> 7%ovi8e8 t"e &ini&& @nis"e8 "eig"t of t"e %aise8 face is 0. && 0.01 in.3. 6. +"e co%%ecte8 se%%ations =ill :e c"ec$e8 as 7e% stan8a%8 %eCi%e&ents :# , Enginee% an8 if fon8 -( =ill :e %elease8 fo% f%t"e% 7%ocess. 6.4 -n 8e acce7tance :# -=ne% t"e sa&e anges =ill :e se8 fo% 7i7ing fa:%ication.
