PONTIFICIA UNIVERSIDAD CATÓLICA CATÓLICA DEL PERÚ
PROYECTO FINAL - INGESOLD
SOLDAD"RA DE T"#ERÍAS EN EST ESTACI$N ACI$N DE DESCO%PRESI$N DE GAS NAT"RAL.
INTEGRANTES: Chero Huamaní Miguel Espinoza Salizar David Mamani Martínez Wilber Perinango Traverso Traverso León ernando !alderrama P"rez #vimael
Índice 1. Introd Introducc ucción ión.. Estud Estudio io de !rt !rte. e.
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&. 'usti(ic!ción de !)s* nor+!)s* o códi,o)s* ! e+e!r. e+e!r. . E!/or!ción de os rocedi+ientos rocedi+ientos de sod!dur!. sod!dur!. .1. 'usti(ic!ción 'usti(ic!ción de ! eección de +!teri! +!teri! de !orte0 roceso roceso de sod!dur!0 Prec!ent!+iento0 Prec!ent!+iento0 tio de unt! entre otros. .1.1.- 2!ri!/es esenci!es de roceso GTA3. .1.&.- 2!ri!/es esenci!es de roceso S%A3. .1..- Dise4o de unt!. .1.5.- %!teri! /!se. .1.6.- %et!es de !orte. .1.7.- Posiciones. .1.8.- Prec!ent!+iento. Prec!ent!+iento. .1.9.- Tr!t!+iento t:r+ico ost-sod!dur!. ost-sod!dur!. .1.;.- G!s de rotección. .1.1<.- C!r!cter=stic!s e:ctric!s. .1.11.- T:cnic!. 5. C!i(ic!ción de rocedi+iento de sod!dur!. 5.1. Cuones ! sod!r )c!ntid!d > oc!i?!ción de esec=+enes*. 5.&. Tios > n@+ero de ro/et!s ! ens!>!r. ens!>!r. Di+ensiones ! tr!:s de esBue+!s. 5.&.1. Ens!>os de tr!cción. 5.&.&. Ens!>os Ens!>os de do/!do do/!do - ,ui!dos. 5. Di+ensiones de ro/et!s de ens!>os. 6. C!i(ic!ción de sod!dores. 7. Criterios !r! ! c!i(ic!ción de rocedi+iento de sod!dur! sod!dur! !r! c!d! ens!>o. 7.1. Insección 2isu!. 7.&. Ens!>os de tr!cción. 7.. Ens!>o de do/e?.
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9. E!/or!ción de ! insección desde e inicio !st! ! uest! en +!rc! de eBuio.
;. Aneos.
1. INT NTR ROD OD"C "CCI CI$N $N..
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códigos, normas, especificaciones, especificaciones, etc. Relacionadas Relacionadas con la misma, de manera que se pueda pueda garantizar la operatividad en servicio requerida de los productos elaborados. Con esta premisa nuestro proyecto apunta a desarrollar los rocedimientos de soldadura para construir una Estación de descompresión de !as !as natural, que es un Con"unto de instalaciones instalaciones de tuber#as, que permiten efectuar la descarga de gas a las instalaciones fi"as de consumidores directos o usuarios de !as $atural como son% Estaciones de !as $atural &e'icular &e'icular para venta al p(blico, plantas industriales, redes comerciales y redes domiciliarias. !ene !enera ralm lmen ente te las las plan planta tass de desc descom ompr pres esió iónn de gas gas natu natura rall tien tienen en tres tres etap etapas as bien bien diferenciadas%
Zona de Descarga de Gas natural. Presión = 250 Bar
Zona de Descompresión de gas. Presión Ingreso= 250 Bar / Presión Salida = depende de los puntos de consumo.
Puntos de Consumo Calderos ! "0 #ar$ % &ornos ! 5 #ar $% Generador de electricidad ! 50 Bar $% Comercios !' #ar$% (esidencias ! ')0 m#ar$.
ara ara esto, esto, la empres empresaa !asodu !asoducto ctoss ).*. ).*. , 'a desarro desarrolla llado do la ingeni ingenier# er#aa de detalle detalle y 'a seleccionado tuber#as de material *)+ * -/ y *)+ * 01 ambas de !rado 2, de 345, )C6 -/. 7as 7as cuales van van a estar sometida sometidass a una temperatur temperaturaa de servicio servicio de 'asta 'asta 849C y la presión llegará 'asta 40 2ar.
&. '"ST '"STIFIC IFICACI$N ACI$N DE DE LA)S* LA)S* NOR%A)S* NOR%A)S* O C$DIGO) C$DIGO)S* S* A E%PLEAR E%PLEAR.. 7a norma de dise:o a emplear será *)E 21-.1 el cual titula T"#ERÍAS DE PROCESO DE Cap#tulo <, #tem 1.- *lcance=. *demás REFINERÍAS Y PLANTAS "Í%ICAS0 ;indicado en el Cap#tulo el #tem 1.-.- Contenido y cobertura, nos indica que el presente código se aplica a tuber#as para todos los l#quidos incluyendo !as $atural. El fluido de traba"o ;!as natural= con resión de 40 2ar, 2ar, temperatura de 849C, inflamable y no to>ico, seg(n el *)E 21-.1 ;*péndice ? gu#a para para clasificar los servicios de fluidos= está catalogado como servicio de fluido normal como se puede apreciar en el esquema de la siguiente figura. El cual nos gu#a a% 8 8
*plica *plicarr el el códig códigoo base base ;Caps. ;Caps. <8 &<= a tube tuber#a r#ass metál metálica icas. s. @ise:ar @ise:ar y construir construir seg(n seg(n las las reglas reglas del del código código para servicio servicio de de fluido fluido $ormal. $ormal.
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Gui! !r! c!si(ic!r os sericios de (uidos )(i,ur! % << de AS%E # 1.* .
Gas Natural
430.9 ar
D! la tala "# $!l AS%E "#&.'( Clas! )'00
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)eg(n *)E 21-.1, los rocedimientos de )oldadura ;A)= y Calificación de )oldadores ;AB= se deben deben desarrolla desarrollarr en base a *)E )ECC<$ )ECC<$
. ELA# ELA#ORACI ORACI$N $N DE LOS PROCE PROCEDI%IE DI%IENTOS NTOS DE SOLD SOLDAD"RA AD"RA.. .1. 'usti(ic!ción de ! eección de +!teri! de !orte0 roceso de sod!dur!0 si es neces!rio o no rec!ent!+iento0 tio de unt! entre otros. +eniendo en cuenta el diámetro y espesor de la tuber#a indicada en el dise:o, la elaboración del procedimiento de soldadura, soldadura, se realizará con un proceso i>to ;!+*A ? )*A=, )*A=, donde la ra#z y relleno se realizará con el proceso !+*A !+*A asegurando la calidad de la unión soldada soldada y el pase de acabado con el proceso )*A, me"orando la tasa de deposición del proceso !+*A. )eg(n lo indicado en el *)E )ección
.1.1.- 2!ri!/es esenci!es de roceso GTA3.
*+,)'& &*R<*27E) @E 7* E)EC
*+,40) 5u1tas
*+,403 %ETAL DE "ASE *+,404 %ETAL DE
R!su!1 $! la Var2al! .# .' . #0 . ## .' .& .6 . ## .3 .4
Es!12al N/ Es!12 Sul!!1t Es!12 al ar2a al
* Dise+o del canal o ranura - (espaldo
, ,
* Separación de ra
,
(etenedores * 1mero de grupo 3mite de 4 4 calicado
,
* P6 1umero Cali7icado * 4ama+o * 1umero 8
, , , , , ,
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*+,40' POSICIÓN
#4 . )) . )3 . 30 . 33 . '0 .# .) .3 .#
*+,40& PRECALENTA %IENTO .3 *+,40 TRAT. TER%ICO POST SOLD.
.#
Consumo del Inserto * Sólido o ncleo met;lico o ncleo
,
*t
,
* Clasi7icación
,
8undente - Posición * Posición * 78Soldadura :ertical Disminución > "00?8 !55?C$ Incremento > "00?8 !55?C$ !IP$ * 4ratamiento 4@rmico Post Soldadura * 4ratamiento 4@rmico Post Soldadura !4 A rango de 4$ 3mites de 4 trail o composición * Simple% mecla o B * :elocidad de 8luo 8luo de respaldo 6 (espaldo o Complemento
, ,
.) .4 .# .) .3 *+,406 GAS .' .9 . #0 * Protección o trailing .# calor aportado *+,409 CARACTERIS TICAS ELECTRICAS
Intensidad de corriente .3 pulsante% I .4 * Corriente o polaridad * (ango de Corriente A .6 Eoltae
. #) .# .3 .'
,
* Flectrodo de 4ungsteno * (ecto/ ondulado EaiE@n * Gri7icio% 4ama+o de 4o#era * H@todo de 3impiea * H@todo de SocaEado. De .& respaldo * Gscilante Pase simple o li
, , , , , , , , , , , , , , ,
, , , , , , , , ,
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iKuierdas O Descendente
66 Fliminación Fliminació n 9 derecQas * Cam#io
N Disminuir/menor Disminuir/me nor Kue
Tabla 1: Variables del procedimiento de soldadura GTAW. Fuente: Estándar ASME sección I.
.1.&.- 2!ri!/es esenci!es de roceso S%A3.
*+,)'3 &*R<*27E) @E 7* E)EC
*+,40) 5u1tas
*+,403 %ETAL DE "ASE
R!su!1 $! la Var2al! .# .4 . # 0 . # # .'
Es!12al N/ Es!1 Sul!!1t Es!1 2al ar2a 2al
* Dise+o del canal o ranura 6 (espaldo
, ,
* Separación de ra
,
(etenedores * 1mero de grupo 4!espesor$ lmite para .& impacto .6 * 4 cali7icado t pase > "/2R !"'mm$ .9
,
. # # .4 .' .& . . # *+,404 %ETAL ) DE APORTE . 3 0 . 3 3 .# *+,40'
* P6 1umero Cali7icado * 1umero 8 * 1umero 9 * Di;metro !electrodo$ * Di;metro > "/) pulgada
, , , , , , , , ,
* Clasi7icación * t !espesor depositado$ * Clasi7icación - Posición
, , , ,
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AS ELECTRICAS .6 .# .'
*+,4#0 TECNICA
* (ango de amperae A :oltae * (ecto/ ondulado EaiE@n * H@todo de limpiea * H@todo de SocaEado. De respaldo * Pase/lado Simple Hltiple
.& .9 . ) ' * Hanual 9utom;tico . ) & Hartillado . & so de proceso t@rmico 4
3FJF1D9 - 9dición 9umentar/maAor Kue iKuierdas 66 Fliminación Fliminaci ón O Descendente 9 derecQas * Cam#io
, , , =
, , = =
= L 9scendente M9 N Disminuir/menor Disminuir/ menor Kue
Tabla !: Variables del procedimiento de soldadura SMAW. Fuente: Estándar ASME sección I.
.1..- Dise4o de 'unt!. El dise:o de "unta a elegir será en &, simple, seg(n se muestra en el siguiente detalle.
Fspesor = .T mm Separación = ' a Separación 5 mm 4alón= " a ' mm
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@iámetro $ominal Cédula @iámetro E>terior @iámetro
45 )C6 -/ ; .1F15 ? .J- mm= 4.1J05 ; /.11 mm= -./1K5 ;F4.K mm= 2er t!/! 5
2er t!/! 7 / psi ; F-0 pa= 2er t!/! 8
/ psi ; F-0 pa= 2er t!/! 6
Tabla ": #esumen de datos para los materiales utili$ado
Co+osición0 %! *zufré Cobre* $#quel* Cromo* Tio S )Tu/o sin costur!* .40 .K0 .0 .F0 .F .F .F Gr!do A Gr!do # < .< 1.& < <.< 6 <.<56 <. 5< <.5< <.5< Tio E )sod!do or resistenci! e:ctric!* e :ctric!* .40 .K0 .0 .F0 .F .F .F Gr!do A .1 -.4 .0 .F0 .F .F .F Gr!do # Tio F )tu/o sod!do en orno* .1 -.4 .0 .F0 .F .F .F Gr!do A * 7a combinación de estos cinco elementos no debe superar el -,L
Ca Carbono
anganeso
Hosforo
olibdeno*
&anadio*
.-0 <.16
. <. <9
.-0 .-0
. .
.-0
.
Tabla %: &omposición 'u(mica del acero ASTM A)". Fuente: Estándar ASTM A)".
+ipo H !rade * F ;11= 1 ;40= *,2
Resistenci! ! ! tr!cción0 +in0 si )%!* El l#mite elástico, min, psi ;pa= Elongación en 4 pulg. ;0 mm=
+ipos E y ) !rado * F ;11= 1 ;40= *,2
!rado 2 7< <<< )516* 10 ;4F= *,2
Tabla ): *ropiedades mecánicas del acero ASTM A)". Fuente: Estándar ASTM A)".
!rado * A
Carbono, ma> anganeso Hosforo, ma> *zufré, ma> )ilicio, min Cromo, ma>2 Cobre, ma>2 olibdeno, ma>2 $#quel, ma>2 &anadio, ma>2
Composición, L Gr!do #
.40 .4J8.K1 .10 .10 .- .F .F .-0 .F . Tabla +: &omposición 'u(mica del acero ASTM A1,+. Fuente: Estándar ASTM A1,+.
<.< <.&;-1.<7 <.<6 <.<6 <.1< <.5< <.5< <.16 <.5< <.<9
!rado C .10 .4K8-./ .10 .10 .- .F .F .-0 .F .
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ara la selección del material de aporte se debe utilizar electrodos con las mismas o me"ores propiedades mecánicas que el material base, por lo tanto se verifica las fic'as técnicas de electrodos de )olde>a, para los procesos mencionados% •
!+*A ,se utilizará el electrodo denominado +
4.0 ;1145= *A) 0.- ? ERJ)8/ 0 ? /F ; J1 8K4 = PF4 ; /K = P44 P Corriente continua electrodo al negativo ; @CE$= -L *r 4 ? -0 K 8-0 88 0 ? -0 , 6, &a, )C antener en un lugar seco y evitar la 'umedad, no requiere almacenamiento ba"o 'orno. Tabla : Fic/a t0cnica de electrodo E#-,S+. Fuente: Solde2a 3 4T,-,.
•
)*A, se utilizará el electrodo denominado *A) EJ- ;)GERC<+O= ? *A) 0.-, por ser un electrodo de ba"o 'idrógeno con buenas caracter#sticas mecánicas y de soldabilidad. Con un arco muy suave, ba"o nivel de salpicaduras y escoria de muy fácil remoción. Con los siguientes datos% @iámetro Mmm ;pulg=N Clasificación Resistencia a la +racción Mpa ; psi=N 7#mite de fluencia Mpa ; psi=N Elongación en 45 MLN Energ#a *bsorbida <)O8& ;819C= MQN olaridad !as rotector *mpera"e ; *= &olta"e ; &= osiciones de )oldadura Conservación del producto
4.0 ;1145= *A) 0.- ? EJ- 04 ? /- ; J0F 8F0= in F ; 0 = #n 41 #n J ;0J= Corriente continua electrodo al positivo ; @CE= 888888 / 8 K -0 8 40 , 6, &a, )C antener en un lugar seco y evitar la 'umedad.
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Nor+! A3S A.< /! ascendente
Descrición.
CroBuis.
+uber#a fi"a a F0V con la Qoriontal
Tabla 1,: *osición de soldadura. Fuente: AWS ".,.
.1.8.- Prec!ent!+iento. Prec!ent!+iento. )eg(n tabla BA F44 del *)E
.1.9.- Tr!t!+iento t:r+ico ost-sod!dur!. +ratamiento térmico post soldadura no es requerido para materiales con $(mero 8- y se verifica en el código *)E 2 1-.1, Cap#tulo &, tabla 11-.-.-. ;Requisitos de +ratamiento térmico=.
.1.;.- G!s de Protección. ara el electrodo seleccionado ERJ)8/ se utilizará *rgón al -L indicados en la fic'a técnica del fabricante del electrodo )olde>a 6+8J ;&er tabla =. 7a tobera a utilizar puede obtenerse teniendo en cuenta el diámetro del electrodo igual a 4.F mm seg(n muestra la tabla --, con un valor de @iámetro interior de la tobera igual a -4 mm.
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GASODUCTOS S.A.
QW-482 ESPECIFICACIÓN DE PROCEDIMIENTO DE SOLDADURA (W (Ver QW-20.! Se"#$%& I'! ASME) Pág.
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PRECALENTAMIENTO (QW-40) Tempera&ura m$%$ma Temp. aH. E%&re paada
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• •
4 ensayos de doblez de cara. 4 ensayos de doblez de ra#z.
7a localización de las probetas de los ensayo requeridos se muestra en la figura -. ara fabricar las probetas de tracción las dimensiones necesarias se indican en el esquema de la figura 4 ;seg(n tabla BA F/4.- ;c= del *)E )ección
Fi9. 1: 8ocali$ación 6 &antidad de espec(menes de caliicación de procedimiento. procedimiento.
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etal de )oldadura )oldadura Cupón de etal 2ase, Calificado, @epositado, ; +racción y @oblez !uiado= $ota ;4= Ensayo, pulg. ;mm= ;$ota - y 4 = Cali Calififica cado do,, pulg pulg.. )oldado )oldado pulg. pulg. ;mm= $ota - y 4 ;mm= +racción 7ado Cara Ra Ra#z in a> a> BA8 BA8 BA8-0 -0 BA8BA8-/ / BA8-/ -/ --/ --/55 a 15 15 --/5 ;-.0 = ;-= incluido
4+
4t
4
8888
4
4
Tabla. 1!: Tipo 6 n
$otas% ;-= 7as siguientes variables restringen además los l#mites mostrados en esta tabla, cuando son referidas en BA840, para el proceso ba"o consideración, BA8F1.K, BA8F1.-, BA8FF.14 y BA8FJ.F, también BA844.4, BA844.1 y BA.44.F ;4= ara la combinación de proce dimientos de soldaduras ver BA84.F ;1= ara los procesos de soldadura )*A, )*A, )*A, !*A y !+*A solamenteW por lo demás para la nota ;-= o 4+, o 4t, cualquiera que sea aplicable. ;F= &er BA8-0-.-, BA8-0-.4, y BA8-0-.1 para los detalles en muestras m(ltiples cuando los espesores del cupón están sobre -5 ;40 mm=.
)i cualquier probeta requerida en BA ? F0- falla en cumplir el criterio de aceptación aplicable, el cupón de ensayo será considerado fallido, y un nuevo cupón de ensayo será soldado.
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6. CALIFICACI$N DE SOLDADORES. E7 código de fabricación *)E 21-.1 titulada T"#ERÍAS DE PROCESOSH indica que para la calificación de soldadores se debe recurrir al estándar *)E )ECC
6.1.. 6.1
2!ri!/ !ri!/es es ese esenc nci! i!es es !r! !r! ! ! c!i c!i(ic (ic!ci !ción ón de so sod!d d!dore ores. s. T!/! 3-67 ROCE)O @E )O7@*@GR* OR *RCO CO$ E7EC+RO@O @E +G$!)+E$O S RO+ECC<$ @E !*) ;!+*A=, *$G*7 S )E<*G+OI+
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6(espaldo * Di;metro de tu#o * P 6 1um#er (elleno * 8 6 1um#er Insertos * Solido o ncleo met;lico a ncleo de 7undente * Deposito de soldadura t - Posición * LO Soldadura Eertical 6(espaldo con gas inerte
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espécimen de doblez. 7os cupones de tuber#a deben ser e>aminados visualmente por BA8-KF sobre toda la circunferencia, interior y e>terior. 8
Ens!>o +ecnico % el tipo y n(mero de muestras de ensayos requeridos para ensayos mecánicos, estarán de acuerdo con BA8F04, ara este caso necesitaremos - ensayo de doblez de cara y - ensayo de doblez de ra#z.
8
E!+en no destructio ou+:trico. Cuando el soldador u operador de soldadura es calificado por ensayos no destructivos volumétricos, como permite en BA81FJ para soldadores y BA810 para operadores de soldadura, la m#nima longitud de cupón para e>aminar e>aminar debe ser /5 ;-0 mm= y debe incluir incluir la circunferenci circunferenciaa total total del tubo, e>cepto esto para diámetros peque:os de tuber#a, m(ltiples cupones de igual diámetro de tuber#a debe ser requerido, pero el n(mero necesario no e>cederá de cuatro cupones de prueba consecutivos. 7a técnica de e>aminación y criterio de aceptación debe ser de acuerdo con BA8-K-.
$ota% )eg(n *)E )ección amen no destructivo volumétrico.
6. C!i(ic!cion de sod!dores. esesores i+ites > eseci+enes de rue/!. 7a siguientes tablas identifican los rangos l#mites de soldadura para soldadura en ranura de
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Criterio de Acet!ción de sod!dur!s > %:todos de e!+en !r! e!u!ciones de i+er(ecciones. Criterio ;* 8 = para tipos de soldadura y para condiciones de servicio M$ota ;-=N )ervicio normal y de fluidos Categor#a Condiciones c#clicas severas )ervicio de fluidos Categor#a @ +ipo de soldadura
+ipo de soldadura +ipo de soldadura
e d = s 4 ; , e a n t a l a i o o r i u c > $ n n e ; a e n s r r o e e c n e f o @ n y i . u s c c d r a a l i v o c d i r a ) r e t i d m
a t o $ ; l a n i d u t i g n = o = l 1 ; a r u t s o c e @ . d l o )
étodo de e>amen
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!r !rieta Halta de fusión enetración incompleta orosidad interna puesta ;$ota ;0== *cabado )uperficial )uperficie de ra#z cóncava ;s ; socavado= Refuerzo de soldadura o protuberancia interna
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$O+*) !E$ER*7E)% ;a= amen disponibles, como se especifica en los párrafos 1F-.F.-, 1F-.F.4, 1F-.F.4, 1F-.F.1 y 1F-.F, por el dise:o de ingenier#a. ;b= [$*[ indica que el código no establece un criterio de aceptación o no requiere una evaluación evaluación de esta clase de imperfección para este tipo de soldadura. ;c= 7a marca de verificación ;Y= indica el método de e>amen generalmente generalmente usado para evaluar el tipo de imperfección imperfección de soldadura. ;d= 7a elipsis ;...= indica el método de e>amen generalmente generalmente no usado para este tipo de imperfección de soldadura. soldadura.
S=+/oo * 2 C @ E H
!
6 < Q Z 7
Criterios % ed id ! E>tensión de la imperfección rofundidad rofundidad de penetración incompleta 7ongitud acumulada de penetración
2!or de os =+ites !cet!/es )Not! )7** Cero ;imperfecciones no evidente= \ - mm ;-14 pulg.= y \ .4 +] \ 1 1 mm mm ;;-.0 pu pulg.= en en cu cualquier so soldadura de de -0 -0 mm mm ;/ ;/ pu pulg.= \ .4 +] \ 1 1 mm mm ;;-.0 pulg.= en en cu cualquier so soldadura de -0 -0mm ;/ ;/ pu pulg.= &ea el código 2&, sección &<<<, @ivisión -, *péndice F ara +] \ /mm ;-F pulg.= el l#mite es el mismo que @ ara +] ^ /mm ;-F pulg.= el l#mite es -.0 > @
\ +]1 \ 4.0 mm ;114 pulg.= y \ +]1 \ +] en cualquier -4 +] longitud de soldadura
cepto como se indica en la $ota ;K=. El metal de aporte de la soldadura deberá emerger suavemente de la superficie en las superficies de los componentes.
\ 4 +] \ 1 mm ;- pulg.= y \ +]4 \ F +] en cualquier de -0 mm ;/ pulg.= de longitud - mm ;-14 pulg.= y \ +]F -.0 mm ;--/ pulg.= y \ ;+]F o - mm ;-14 pulg.== 0 min. Ra por *)E 2F/.Espesor total de la Qunta, incluido el refuerzo de soldadura, _ +] ara +] mm ;pulg.= \ / ;-F= ^ / ;-F= \ -1 ;-4= ^ -1 ;-4= \ 40 ;-= ^ 40 ;-=
*ltura, mm ;pulg.= \ -.0 ;--/= \ 1 ;-= \ F ;114= \ 0 ;1-/=
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7a altura de refuerzo o de la protuberancia interna interna ;$ota ;== como s e describe en 7, la $ota ;K= no se aplica.
El l#mite es el doble del valor aplicable para 7 ;arriba=
Tabla. 1-: &riterio de Aceptación de soldaduras 6 M0todos de e2amen para e>aluaciones de imperecciones. Fuente: &ódi9o ASME ?"1.".
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$O+*)% ;-= 7os criterios criterios indicados indicados son para el e>amen requerido. 7os criterios más e>igentes pueden especificarse en el dise:o de la ingenier#a. &ea también los párrafos 1F-.0 y 1F-.0.1. ;4= 7a soldadura de cone>iones de derivaciones incluye soldaduras sometidas a presión en ramales y traslapes fabricados. ;1= 7as "untas de soldadura longitudinal incluyen costuras rectas y en espiral. El criterio no pretende ser aplicable a las soldaduras realizadas de acuerdo con el listado de normas de la +abla *8- o la +abla 14/.-. 7a rueba de fugas alternativa requiere el e>amen de estas soldadurasW consulte el párrafo 1F0.K. ;F= 7as soldaduras de filete incluyen soldaduras embonadas y de sello, y las soldaduras de unión de las bridas deslizantes, los refuerzos de ramales y los soportes. ;0= Estas imperfecciones se eval(an solo para soldaduras de espesor nominal menores o iguales a 0 mm ;1`-/ pulg.=. ;/= @onde dos valores l#mites estén separados por TyT, el menor de los valores determina la aceptación. @onde dos con"untos de valores están separados por To5, el valor mayor es el aceptable. +] es el espesor nominal de la pared del componente más delgado de los dos componentes unidos con soldadura a tope. ;J= 7as caras de la ra#z a tope a"ustadas y sin fusión son inaceptables. ;= ara las soldaduras soldaduras de ranura, ranura, la altura altura es la menor de las medidas realizadas realizadas desde las superficie superficiess de los componentes componentes adyacentes, ambos el refuerzo y la protuberancia interna está permitida en la soldadura. ara las soldaduras de filete, la altura se
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8. CRITERIOS PARA LA CALIFICACI$N DE LOS SOLDADORES PARA CADA ENSAYO. E7 código de fabricación *)E 21-.1 titulada T"#ERÍAS DE PROCESOSH indica que para los criterios de aceptación se debe recurrir al estándar *)E )ección
3-<5.1 E!+in!ción. 7as soldaduras realizadas en cupones de ensayos para la calificación de 'abilidades pueden ser e>aminadas por ensayos visuales y mecánicos ;BA814.-, BA8 14.F= o por $@E volumétrico ;BA814.4= para el proceso ;s= y el modo de la transferencia del arco especificado en BA81F. or otra parte, un m#nimo de /5 ;-0 mm= de longitud de
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7as probetas de doblado guiado no tendrán que tener defectos abiertos en la soldadura o en la zona afectada por el calor que e>cedan de - pulg., medida en cualquier dirección sobre la superficie conve>a de la probeta después del doblado. 7os defectos abiertos que aparecen en las esquinas de la probeta durante el ensayo no serán considerados a menos que 'aya evidencia precisa de que ellas resultan por falta de fusión, inclusiones de escoria u otros defectos internos. 3-1;1.1.&.1 Ter+inoo,=!. ;a=
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ELA#ORACI$N DE LA INSPECCI$N DESDE EL INICIO MAST MASTA A LA P"ESTA EN %ARCMA DEL E"IPO.
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9.1. Contro de rocesos +odas las actividades de la gestión de control e inspección de los procesos establecidos desde el inicio 'asta la puesta en marc'a del sistema de descompresión de la planta de gas natural serán realizadas de acuerdo acuerdo a los procedimientos internos internos de la empresa !*)O@GC+O) ).*. y serán
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ITE
SOLDAD"RA DE T"#ERÍAS EN ESTACI$N DE DESCO%PRESI$N DE GAS NAT PLAN DE P"NTOS DE INSPECCION. B ROCE@<
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SOLDEO DE '"NTA ♦
&erificación &erificación de parámetros de soldadura
RO80% )oldeo de "unta. C
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♦
)ecado interno de tuber#a
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;.1 For+!to de 3PS. GASODUCTOS S.A.
QW-482 ESPECIFICACIÓN DE PROCEDIMIENTO DE SOLDADURA (W (Ver QW-20.! Se"#$%& I'! ASME)
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