3.05 a. Welding Specification of Carbon Steel & Alloy Steel

8/18/2019 3.05 a. Welding Specification of Carbon Steel & Alloy Steel

1/40

WELDING SPECIFICATION OF CARBON

STEEL & ALLOY STEEL PIPING

SCOPE

•This specification coe!s !e"#i!e$ent fo! a!c

%e'in( of)

*ca!+on an' o% ao, stee pipes an' fittin(s-

*For pipes to be used for steam services,

* the !e"#i!e$ent of In'ian +oie! !e(#ationsha app,)

* in a''ition to a non*confictin( !e"#i!e$ent of

this specification-


2/40

REFERENCE STANDARDS.

• AS/E B 01-0 *Co'e fo! p!ess#!e pipin(-• AS/E P2 Co'e Sec I3 * We'in(

• GRAI.PIP *Ai(n$ent of pipes & fittin(s fo! %e'in(-

• GRAI.PIP *Inspection !e"#i!e$ents of f#sion %e's of

pipes


3/40

WELDING 45ALIFICATIONS.

• We'in( p!oce'#!e an' %e'e! sha +e "#aifie' as pe!

the !e"#i!e$ent of AS/E P2 Co'e section I3-

• We' as %e as heat affecte' 6one in pipe ope!atin(

+eo% *177 8C sha $eet the i$pact test !e"#i!e$ent inacco!'ance %ith $ate!ia specification-

• I$pact a#es sha +e !eco!'e' %ith %e'in( p!oce'#!e

an' %e'e!s9 "#aification test-


4/40

/ATERIAL SPECIFICATION.

Materials have been grouped,

on the +asis) of co$position) $echanica p!ope!ties an'

%e'a+iit, as (ien in Ta+e*1 -

The t,pica) Material specification, hae aso +een

in'icate'-


5/40

TABLE *1

Material P- Material Typical Specifications

group number type

1 1 C S up to ASTM A105, A106 B, A234, API-5L 0.35 C BS:3602, DIN 17175 St 45.8

2 1 CS for o! ASTM A233 "rI, A 420 "r #PL 6,

t$%p &$r'()$ BS:3603 "r 27, LT 50

*$o! 33 +C

3 3 Cr*o- Mo ASTM A335 "r PI, A234 "r #P 1, St$$ DIN 17175 "r. 15 Mo 3

4 4 1Cr- 1/2 Mo, ASTM A335 "r PI2/P11, A234 "r

1 Cr- #P 12/#P11, A 182"r.11/12,BS3604

Mo &t$$ "r.620/621,DIN17175"r.10,Cr-Mo 44 5 5 2 Cr-1 Mo ASTM A335 "r P22, A234 "r P22

St$$. A 182"r.22,BS3604 "r.622,DIN 17175

"r10, Cr-Mo 10

6 - 17 Cr-Mo-10 ---

7 3 N( &t$$& ASTM A333 "r3, A420 "r.#PL


6/40

WELDING PROCESS

Welds shall be made by one of the process:

• /an#a $eta a!c %e'in( ://A o! S/AW;-

• Ine!t (as shie'e' $eta a!c %e'in( :/IG o! G/AW;-

• Ine!t (as shie'e' t#n(sten a!e %e'in( :TIG o! GTAW;-

• Root !#n in case of pipes hain( p!ess#!e !atin( (!eate!

than G?C/@ sha +e $a'e +, /IG o! TIG p!ocess-

• Insi'e of the pipe sha +e p#!(e' %ith a!(on-

• o%ee! if chippin( an' +ac %e'in( is possi+e theshie'e' $eta a!e %e'in( $a, +e #se' fo! !oot !#ns-


7/40

FILLER /ETALS.

• $)tro$& for %u %$t r$ !$( of (ff$r$t &t$$&&9 *$ & p$r T*$-2.

• $)tro$& &9 *$ r pr(or to !$(.• Lo! 9ro$ $$)tro$& %u&t *$ )o%p$t$ r !9$ u&$

%uf)tur$r& (&tru)t(o for r( %u&t *$ 9$r$ to.• It (& oo pr)t()$ to r $$)tro$& ( &u(t*$ 9$t$r t

)otro$ t$%p$rtur$ of 150-200+C for t9$ !9o$ (9t *$for$

t9$(r u&$ ( o )&$ for $&& t9 four 9our&.• or !$( out&($ prt()ur ( !$t !$t9$r&, t9$$$)tro$& &9ou *$ ;$pt ( port*$ 9$t( )ot($r& ut(t9$(r u&$.

• $)tro$&, ro& or f($r !(r$& u&$ for ($rt & &9($$ %$t

r$ !$( & r$)o%%$$ tp$.

• #$& Prou)$ &9 9'$ %$)9() %$tur()prop$rt($& $?u('$t to t9o&$ of t9$ *&$ %$t.


8/40

TABL-2

Mt$r( B&$ %$t Sp$)(f()t(o $)tro$& -No.

"roup tp$ of &t$$ )&&1- Cr*o &t$$ A#S A 5.1 6010/13 for root ru -3

7015/16/18 for f((

1 . CS for Lo! A#S A 5.1 7015/16/18/24 -4

T$%p S$r'()$


9/40

NOTES ON TABLE @.

• E"#iaent $ate!ia to othe! specification $a,aso +e #se'-

• Eect!o'es co!!espon'in( to E 33 1< an' E 331 o% h,'!o(en t,pes $a, aso +e #se'-

• Eect!o'es fo! %e'in( of ca!+on an' o%ao, stees to a#stenitic stainess stee shaconfo!$ to cass E07 /o :@C!*1@ Ni %ith /o;-

• In %e' oints +et%een C!*/o stees of

'iffe!ent C!*pe!cent) the fie! $ate!ia sha haean inte!$e'iate C! pe!cent) o! if this is notpossi+e) the o%e! C! pe!cent of the t%o stee to+e %e'e'-


10/40

BASE /ETAL PREPARATION.

• T9$ $ &9 *$ pr$pr$ * %)9((, r(( or f%$)utt(.

• $ pr$prt(o for E-roo'$& &9 *$ pr$pr$ * %)9(( / r(( o &9 ot *$ f%$ )ut.

• %$ )ut &urf)$ &9 *$ r$&o* &%oot9 )o%p$t$fr$$ fro% oF($ pr(or to !$(.

• Cr*o %o*$u%, 1 Cr -1/2 Mo 11/4 Cr -1/2 Mo &t$$p(p$& &9 *$ pr$9$t$ for t9$r% )utt( to %((%u% 100+C !9$ t9();$&& of p(p$ (& *o'$ 12 %%.

• 2 1/4Cr-Mo p(p$& &9 *$ pr$9$t$ for t9$r% )utt( to 150+C %(, for p(p$ t9();$&&$&.

• Pr(or to !$(, t9$ roo'$ G)$t *&$ %$t, for (&t)$ of t $&t 2T or 50 %%,

• T9$ u&$ of &o'$t for r$&$, o(, p(t r$%o' (&r$)o%%$$.


11/40

ALIGN/ENT

• The a+#ttin( e'(es of oints sha +e ai(ne' as

acc#!ate, possi+e an' $aintaine' in ai(n$ent '#!in(

%e'in( +, tac %e'in( o! othe!%ise)• the ai(n$ent sha +e %ithin i$its specifie'-


12/40

PREEATING.

• Pr$9$t r$?u(r$%$t pr$9$t t$%p$rtur$ &9 *$ &&p$)(f($ ( T*$ -3.

• #9$ !$( (&&(%(r %$t& or %t$r(& !(t9 (ff$r$tt9();$&&, t9$ %t$r( 9'( t9$ r$t$r t9();$&& or r$t$r)r*o or o )ot$t &9 o'$r. #9$ &(p- o f$& r$tt)9$ * f($t !$&, t9$ t9();$&& of p(p$ &9 o'$r.

• Pr$9$t &9 *$ pp($ to t9$ r$ o) to ()u( t9$!$ pr$prt(o t9$ t$%p$rtur$ &9 *$ %(t($ur( t9$ $t(r$ !$( op$rt(o.

• T9$ pr$9$t t$%p$rtur$ &9 *$ )9$);$ * t9$ u&$ oft$%p$rtur$ (()t( )ro&, t9$r%o )oup$& or ot9$r&u(t*$ %$t9o.

• It &9 *$ $&ur$ t9t t9$ r$?u(r$ pr$9$t (& o*t($ tpo&(t(o up to 100 %% fro% t9$ out&($ $$ of t9$ Go(tpr$prt(o.


13/40

PREEATING.

• P!eheatin( !e"#i!e$ents sha aso app, to tac %e'in(

as %e as %e'in( of st!#ct#!a attach$ents to pipin(-

• The !ate of p!eheatin( sha not ecee' 1778C pe! ho#!

o!


14/40

FIT H5P:

•In case of pipin( of no$ina p!ess#!e $o!e than@ (?c$@ %ith thicness = $$ o! a!(e!) the pieces to+e +#tt %e'e' sha +e co#pe' +, ,oes o! +!i'(e C*ca$p-

• Fo! ao, stee an' o% te$pe!at#!e se!ice +eo%*008C)

eect!o'es confo!$in( to E07 sha +e #se'-• Whe!e C! @J) the pipe s#!face sha +e p!eheate'oca, to 17*@77 8C +efo!e %e'in( of the ca$ps-

• Fo! %e'in( of ,oes o! +!i'(e C* ca$ps) @- $$ o!0-@ $$ eect!o'es sha +e #se'-

• Ca!e sha +e taen to aoi' #n'e!c#ts-• D#!in( the !oot !#n) ,oes o! +!i'(e C* ca$ps sha +e

!e$oe' aoi'in( c!ate!s o! 'a$a(es on pipe-• An, c!ate! on pipe sha +e !epai!e' an' s#!face

i!!e(#a!ities on the pipe afte! !e$oa of ,oes o!

ca$ps sha +e (!o#n' off-


15/40

FIT 5P.

• Fo! thicness = $$ o! ess) tac %e' in the (!ooe in

pace of ca$ps $a, +e pe!$itte' p!oi'e' the, a!es#+se"#ent, !e$oe' '#!in( the !oot !#n-

• P!eheatin( is !e"#i!e' as pe! Ta+e*0-

• In case of pipin( of PN ess than 1< (?c$@) the tac*%e's $a, +e eft p!oi'e' the, a!e !e*$ete' in the%e' an' co$pete penet!ation is achiee'-

• o%ee!) c!ace' tac %e' sha +e !e$oe'-

• In case of fiet %e's) tac %e's a!e pe!$itte' fo! fit*#pan' the, $a, +eco$e a pa!t of the %e') p!oi'e' the,a!e f!ee f!o$ 'efects an' !e*$ete' in the s#+se"#ent%e'in(-

• P!e heatin( is !e"#i!e' as pe! Ta+e*0-


16/40

TABLE *0 :PREEATING RE45IRE/ENTS;

Mt$r( T9$r% A ot9$r r) !$( pro)$&&$F)$pt

)utt( oF- )$t$$ !$(

HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH

Mt$r( Tp$ of T9();$&& for M(. Pr$ T9();$&& for !9()9 M(. Pr$ 9$t(

roup &t$$ !9()9 Pr$ 9$t( 9$t( Pr$ 9$t( (& r$?u(r$ T$%p. +C

(& $?u(r$, %%. T$%p +C %%.

----------------------------------------------------------------------------------------------------------------------------------------

1 CS up - - 18 100 to 0.35J C

2 CS for o! t$%p. - - K 5 150

&$r'()$& *$o! -33+C

3 Cr*o- Mo 12 100 A 150

C- Mo4 1Cr- Mo A 100 A 150

1 Cr@ Mo

5 2 Cr- 1 Mo A 150 A 200

6 17 Cr. Mo- 10 A 150 A 250- 300

7 3 N( A 250 A 350


17/40

WELDING PROCED5RE.

•The eect!o'e si6e fo! !oot pass sha not +e (!eate!than 0-@$$-

• The fiin( sha +e $a'e +, shie'e' $eta a!e %e'in(:S/AW; %ith eect!o'es not a!(e! then = $$-

• Di!ect c#!!ent sha +e #se') %ith eect!o'es ho'e!

connecte' to the position poe-• Fo! pipe in ho!i6onta fie' position the #p%a!'

techni"#e sha +e #se' as a !#e-

• Whe!e !oot !#n is $a'e +, TIG o! /IG) the insi'e of the

pipe sha +e p!otecte' %ith the shie'in( (as-• The !oot !#n of +#tt oints) !e(a!'ess of the techni"#e

#se') sha +e s#ch to achiee f# penet!ation-

• Fit*#p tac %e'in( sha +e !e$oe' p!o(!essie,'#!in( the !oot !#n) ecept in cases $entione' in ca#se17-0 an' 17-=-


18/40

Contin#it, of We'in( an' P!eheat.

• I!!espectie of the cass of stee) !oot !#ns sha +e $a'e

%itho#t inte!!#ption othe! than fo! the chan(in( ofeect!o'es o! fo! ao%in( the %e'e! to !eposition hi$sef-

• Root !#ns $a'e in the %o!shop $a, afte!%a!'s +eao%e' to coo p!oi'e' that p!eca#tions a!e taen toens#!e a o% cooin( :e-(- %!appin( in '!, as+estos

+anets;-• We' at site sha not +e ao%e' to coo #nti the

thicness of %e' $eta 'eposite' ecee' one*thi!' of thefina %e' thicness o! 17 $$ %hichee! is (!eate!-

• When %e'in( @ 1?= C!*1/o an' 1K C!*/o*217 stees itis st!on(, !eco$$en'e' that a!!an(e$ents +e $a'e toaoi' an, inte!!#ption of %e'in(-


19/40


• Whe!e s#ch an inte!!#ption is necessa!,) eithe! the

p!eheat te$pe!at#!e sha +e $aintaine' '#!in(

inte!!#ption o! the oint sha +e %!appe' in '!, as+estos

+anets to ens#!e so% cooin(-

• Befo!e !eco$$encin( %e'in() p!eheat sha a(ain +e

appie'-

• On co$petion of %e'in() the oint sha +e %!appe' in

'!, as+estos +anets to ens#!e so% cooin() #ness

post*%e' heat t!eat$ent is appie' i$$e'iate,-


20/40


• On co$petion of !oot pass) !e(a!'ess ofthe techni"#e #se') an, isi+e 'efects an' a

i!!e(#a!ities of the %e' %hich co#' +e

'et!i$enta to the net pass sha +e (!o#n' off-

• At each inte!!#ption of %e'in() the sa( sha

+e !e$oe' f!o$ the !esta!t 6one an' it is

!eco$$en'e' to (!in' off the en' c!ate!-

• On co$petion of each pass) sa( sha +eca!ef#, !e$oe' an' an, 'efect of %e' %hich

co#' +e 'et!i$enta to the net pass sha +e

(!o#n' off-


21/40


• The a!c sha not +e sta!te' +, st!iin( theeect!o'e on the pipe %a) off the oint a!ea

• - At each inte!!#ption of %e'in() the a!c sha +e+o%n o#t on the +ee instea' of on the %e'$eta an' the a!(on fo% sha +e contin#e' fo! so$e secon's) so as to ao% c!ate! cooin(#n'e! its p!otection-

• It is !eco$$en'e' to !e$oe the en' c!ate!

+efo!e the !esta!t-• This is pa!tic#a!, i$po!tant in case of shie'e'

$eta a!c %e'in( of ao, stees-


22/40


• Afte! the %e'in( is sta!te' an' #nti the oint has not+een co$pete') 'ispace$ents) shocs) i+!ations o! st!esses sha +e ca!ef#, aoi'e') in o!'e! to p!eentc!acs o! +!eas in the %e'-

• No %e'in( sho#' +e 'one in hea, !ain o! hi(h %in'-

• Afte! %e'in() %e'e!s i'entif,in( si(n assi(ne' #pon his

"#aification) sha +e cea!, sta$pe' at a 'istance of ateast 07 $$ f!o$ the e'(e of the %e'-


23/40

POST WELD EAT TREAT/ENT • Post %e' heat t!eat$ent sha +e !e"#i!e' as specifie'

in Ta+e*=-

• The heat t!eat$ent to +e #se' in p!o'#ction %e'in(sha +e state' in the %e'in( p!oce'#!e an' #se' in the"#aification of the %e'in( p!oce'#!e-

• When %e'in( 'issi$ia! $etas o! $ate!ias %ith'iffe!ent thicness) the $ate!ia hain( the (!eate!

thicness o! (!eate! ca!+on o! ao, content sha(oe!n-• Dissi$ia! oints inc#'in( +oth fe!!itic an' an a#stenitic

%e' o! co$ponent sha +e heat t!eate' acco!'in( tothe !e"#i!e$ent fo! the fe!!itic $ate!ia-

• When sip*on fan(es a!e attache' +, fiet %e's) thethicness of pipe sha (oe!n-• In the case of +!anch connections) $eta :othe! than

%e' $eta; a''e' !einfo!ce$ent) %hethe! inte(!a o! attache') %i not +e consi'e!e' in 'ete!$inin( heat

t!eat$ent !e"#i!e$ents-


24/40

POST WELD EAT TREAT/ENT.

• eat t!eat$ent p!oce'#!e sha ens#!e #nifo!$

te$pe!at#!e 'ist!i+#tion a!o#n' an' th!o#(h the

thicness of the oint-

• Effectie oca heatin( of the s#!face sha +eaoi'e'- It is !eco$$en'e' to inse!t p#(s in

pipin( o! p#t +in' fan(es to p!eent ai!

ci!c#ation th!o#(h insi'e of the pipe-


25/40

TABLE*=

Mt$r( T9();$&& for So;( T(%$ t T$%p. Br($

Mt$r( Tp$ of !9()9 po&t !$ 9$t t$%p.+C p$r 25 %% of 9r$&&,&t$$ tr$t%$t (& r$?u(r$, %% t9();$&&, 9r&. %F

HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH

1 CS up to0.35J 18 %%. or %or$ 600- 650 1 < M( = -

1. CS. LT &$r'()$ A !$& to *$ 600 -650 1


26/40


• The te$pe!at#!e sha +e chece' an' !eco!'e' '#!in(the pe!io' of heat t!eat$ent an' it sha +e ens#!e' thata !e"#i!e' te$pe!at#!e is $aintaine'-

• Post %e' heat t!eat$ent sha +e acco$pishe' +, one

of the foo%in( $etho's.:a; eatin( the co$pete st!#ct#!e as a #nit-

:+; eatin( the co$pete section containin( the %e' o!%e's to +e st!ess !eiee' +efo!e attach$ent to othe!section of %o!-

:c; Loca heat t!eat$ent-


27/40


• T9$ o) 9$t tr$t%$t pro)$ur$ &9 %$$t t9$ foo!( %((%u%r$?u(r$%$t&:

• T9$ 9$t( rt$ &9 ot $F)$$ t9$ foo!( 'u$&:• Cr*o &t$$ 1/2 Mo &t$$&

• 250+C /9r. for t9();$&& up to 30 %%.• 200+C /9r. for t9();$&& o'$r 30 %%.• A ot9$r o &t$$& LT p(p$&

• 200+C /9r. for t9();$&& *$o! 15 %%.• 150+C /9r. for t9();$&& 15-30 %%.

• 00+C /9r. for t9();$&& o'$r 30 %%.• T9$ *o'$ 'u$& % *$ ()r$&$ * 100+C !9$ t9$ tr$t%$t (& %$ *

(u)t(o $?u(p%$t.


28/40


• T9$ )oo( rt$ for !$& &9 ot $F)$$ t9$ foo!( 'u$&up to t$%p$rtur$ of 400+C.

• Cr*o &t$$& 1/2 Mo. &t$$

• 200+C /9r. for t9();$&& up to 30 %%.• 150+C /9r. for t9();$&& o'$r 30 %%.• • A ot9$r o &t$$& LT p(p$&

• 150+C /9r. for t9();$&& *$o! 15 %%.• 100+C /9r. for 15-30 %%.• 70+C /9r. for t9();$&& o'$r 30 %% o! t$%p$rtur$


29/40


• The 'isposition of heatin( ee$ents sha +e s#ch as to

o+tain a te$pe!at#!e p!ofie %hich is app!oi$ate,s,$$et!ica a+o#t the cent!e ine of the %e' an'ci!c#$fe!entia, #nifo!$ -

• The $ini$#$ %i'th of the ci!c#$fe!entia +an' cente!e' onthe %e's) sha not +e ess than


30/40


• The on(it#'ina te$pe!at#!e (!a'ient sha +es#ch that s#fficient en(th of $ate!ia on eachsi'e of the %e' !e$ains at a te$pe!at#!eecee'in( haf the st!ess !eiein( te$pe!at#!e-

• This en(th sha +e (!eate! than @- S" Root:RT; %he!e R is the !a'i#s of the +o!e at the ointan' T is the thicness of the $ate!ia at the oint-

• A co$pete a#to$atic te$pe!at#!e !eco!'in(sha +e $a'e of a#es taen +, eachthe!$oco#pe as a f#nction of the ti$e +,s#ita+e !eco!'e!s) inc#'in( cooin( to =77+C-


31/40


• Whe!e ha!'ness i$it is (ien in ta+e*=)

• a $ini$#$ of 17 pe!cent of %e's in each heatt!eat$ent +atch %hich a!e f#!nace heat*t!eate'

• an' 177 pe!cent of those %hich a!e oca, heat t!eate'

sha +e ha!'ness teste'-• The ha!'ness i$it appies to %e' an' to heat affecte'

6one-

• a!'ness test of the heat affecte' 6one sha +e $a'e at

a point as nea! as p!actica+e to the e'(e of the %e'-


32/40

INSPECTION & TESTING

• ALL WELDS CO2ERED BY TE SPECIFICATION

SALL BE S5BMECT TO INSPECTION BY

P5RCASER INSPECTOR AS PER SPECIFIED

INSPECTION RE45IRE/ENT-


33/40

RECTIFICATION OF DEFECTS

• A 'efects in ecess of those specifie' sha +eco$pete, !e$oe' +, chippin() (!in'in() $achinin( o!the!$a c#ttin( to so#n' $eta +efo!e !e*%e'in(-

• The en's an' si'es of the c#t sha +e (!a'#a, tape!e'f!o$ the +ase of the c#t to the s#!face of the %e' $eta-

• The si6e an' p!ofie of c#t sha +e s#ch as to (ie

a'e"#ate access fo! %e'in(-• Whe!e a fa#t, %e' has +een c#t) !e %e' the enti!e (i!th

an' the!e sha +e no se!io#s oss of pipe*en(th-

• The e'(es sha +e p!epa!e' fo! !e*%e'in( as specifie'

fo! the o!i(ina %e'-• In case of sho!tenin( of pipe en(th afte! c#ttin( a fa#t,

%e') a en(th of pipe containin( the fa#t, %e' sha +e!e$oe' an' a ne% en(th of pipe %e'e') %ith the e'(ep!epa!e' as specifie'-


34/40

RECTIFICATION OF DEFECTS.

• Re %e'in( of 'efectie %e's sha +e 'one aspe! the "#aifie' p!oce'#!e-

• P!eheatin( an' post %e' t!eat$ent sha +e as

!e"#i!e' fo! o!i(ina %e's ecept fo! $ino!!epai!s-

• A !epai!s to 'efectie %e' sha +e !epo!te' tothe p#!chase!9s inspecto!-

• A !epai!e' %e' sha +e s#+ecte' to the sa$etestin( an' inspection !e"#i!e$ents as theo!i(ina %e's-


35/40

TABLE*

POS WE!" #E$ %E$ME& %E'()%EME& FO% !OWEMPE%$(%E P)P)&*:

Lo%est se!ice Thicness fo! %hich post

te$pe!at#!e) +C %e' heat*t!eat$ent!e"#i!e') $$*

* 0= to *=7 10 an' a+oe

*=1 to *7 an' a+oe

*1 to *


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PCAETIN AND SPCIAL EIMNTS L#

TMPATE SIC BL# -33 +C.

• It $#st +e !e$e$+e!e' that ca!e p#t into the 'esi(n an'choice of $ate!ia can +e n#ifie' +, appa!ent, $ino!fa#ts o! ca!eessness in fa+!ication an' %e'in(-

• The "#ait, of %e'in( has a e!, i$po!tant +ea!in( onthe safet, of the pipin( an' this $#st +e app!eciate' +,

a conce!ne' %ith the fa+!ication of o% te$pe!at#!epipin(-• Non*oa' +ea!in( attach$ents an' $ino! attach$ents

!e"#i!e the sa$e stan'a!' of %o!$anship as the $ainpipin( to %hich the, a!e attache'-

• Ee!, p!eca#tion sho#' +e taen to aoi' fa%s &notches f!o$ fa+!ication ie #n'e!* c#ttin() ecessie!einfo!ce$ent) sa( inc#sions) a!c fashes etc-


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• A )ut $$&


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• Ee!, ca!e sha +e taen to ens#!e that aeect!o'es #se' a!e those specifie' an'app!oe' an' the, a!e sto!e' an' han'e' ins#ch a %a, as to ens#!e no 'ete!io!ation-

• The eect!o'es $#st +e '!ie' p!io! to %e'in( at@77* @7 8C fo! $ini$#$ one ho#!-

• The, sho#' +e ept hot '#!in( %e'in( +,eepin( in a containe!-

• P!eheatin( an' post %e' heat t!eat$ent sha +eca!!ie' on ca!ef#, at specifie' te$pe!at#!es asthese t!eat$ent affect the notch to#(hness of the%e' an' pa!ent $eta app!ecia+,-


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• Beca#se the notch to#(hness of a %e' 'eposit'epen's c!itica, #pon the techni"#e #se') it is essentia

that p!oce'#!e e$po,e' in $ain( %e'in( p!oce'#!e

tests is '#picate' as fa! as possi+e '#!in( p!o'#ction

%e'in(-• Not on, the c#!!ent an' ota(e settin( sho#' +e the

sa$e) +#t aso the $anip#ation techni"#e) ie- +ea'

a,in() %eain( an' spee' of t!ae-

• Ca!e sha +e taen that eect!o'es a!e st!#c eithe! in%e' (!ooe o! on '#$$, $ate!ia o#tsi'e the p!ope!

$ate!ia to +e %e'e'-

• If an, a!c st!ies occ#! o#tsi'e of the (!ooe) the a!ea

sha +e (!o#n' an' sha +e inspecte' to ens#!e that no

c!acs hae !es#te'-


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• No %e'in( sha +e 'one afte! fina heat t!eat$ent-

• We' sha hae f# penet!ation- 5n'e!*c#ttin( o! +a'p!ofie sha +e aoi'e' o! co!!ecte' +, ca!ef# (!in'in(-

• P!ope! s#pe!ision of the %e'in( %o! f!o$ the+e(innin( to the en' of the o+ is i$pe!atie pa!tic#a!,fo! pipe thice! than < $$-

3.05 a. Welding Specification of Carbon Steel & Alloy Steel

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Transcript of 3.05 a. Welding Specification of Carbon Steel & Alloy Steel