Welding Fabrication Procedure API-650 Tank

   

 

  1.0 P 2.0 R 3.0 W 4.0 W 5.0 M 6.0 B 7.0 B 8.0 J 9.0 P 10.0 T 11.0 B 12.0 I 13.0 W 14.0 I 15.0 I 16.0 A 17.0 W 18.0 P 19.0 A 20.0 A PURPOSE AND REFERENCES WELDER QUA WELDING PRE MATERIALS .. BASE MATERI BASE MATERI JOINT FIT-UP PREHEAT ... TACK WELDS BACKPURGE/B NTER-PASS T WELDING TEC NTERRUPTION NSPECTOR QU ACCEPTANCE WELD REPAIR POST WELD H ATTACHMENT ATTACHMENT D SCOPE ... ... ALIFICATION . EREQUISITES. ... IAL JOINT PRE IAL JOINT CLE AND ALIGNM ... S ... BACKING GA TEMPERATURE CHNIQUE... N OF WELDIN UALIFICATION CRITERIA FO RS... HEAT TREATM T WELDS... TS...

TABLE O

... ... ... ... ... EPARATION .. EANING ... MENT ... ... ... S ... E ... ... NG ... N... OR COMPLETE ... MENT ... ... ...

OF CONT

... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ED WELDS ... ... ... ... ...

TENTS

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1.0 P

UR 1

2.0 R

EF 1 2

3.0 W

EL A. ac

4.0 W

EL A. A S B. W lo w m in te en pr

5.0 M

AT A. B B. O 1 C. W Pr D. R W E. W w

 

6.0 B

ASE A. T li W fr C RPOSE AND . This Wel requiremen effect or as ERENCES  . API 650, “ . ASME Sec LDER

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UAL Welder/weld ccordance wit LDING

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RE All welding sh Specification ( Welding shall ower than 0° F weld joint shal moisture has n ntroduced int emperature sp ntrapped moi resent. TERIALS  Base Materials Only the mater . Filler Mate Welding filler rocedure Spe Requirements f WPS. Welding filler welders makin E

M

ATERIA The edges of mited to 3/8 in When edges o ree of scale an Circumferentia

S

COPE  lding Fabrica nts of API 65 s otherwise sp “Weld Steel T ction IX, “We

LIFICATIO ding operators th API – 650. EREQUISITE hall comply w (WPS). not be perfor F or when sur ll be sufficien not been trapp to previously pecified in the isture. The ad s rials specified erials materials to b cification (W for procurem materials (ele ng weldments AL

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OINT

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plates may b n. thickness o f plates are o nd slag accum al edges of ro ation Procedu 0. The Code pecified by th

Tanks for Oil S elding and Br

ON 

s shall be c

ES 

with the require

rmed when th rfaces are wet ntly protected ped between m y fit-up joint e Welding Pro dditional preh d shall be used be used with t WPS.

ent and contro ectrodes, bare

with this proc

P

REPARAT

be sheared, m of plates for b oxygen cut, th mulations befo

oof and bottom

ure (WFP) sh edition and a he client. Storage” azing Qualifi currently cert ements specif he ambient tem t or exposed t d from inclem members that s prior to fi ocedure Spec heat should be d. this procedure ol of filler ma e filler wire, o cedure. Weld TION  machined, chip butt-welded j he resulting su ore welding. m plates may hall govern th addenda for th ications” tified, having fied in the We mperature in t to rain, snow, ment condition t are to be we inal welding. ification (WP e applied if th e are specified aterials shall b or consumable ders shall not

pped, or mach joints and 5/8 urface shall b y be manually he welding o his procedure g performed elding Proced the immediate , dust, or high ns. Care shall elded and that

. Preheating PS) may be n here is reason d in the Weld be in accordan e inserts) mus perform weld hine oxygen in thickness be uniform an y oxygen cut. f components e shall be the qualification dure e vicinity of t h wind. The w be taken to a t moisture ha g above the ecessary to re n to believe m ding nce with st be utilized b ds autogenous cut. Shearing for lap- weld nd smooth an . Kerf or gou s to the latest in n tests in the weld is welder and assure that as not been minimum emove any moisture is by sly. g shall be ded joints. d shall be uge marks

 

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ASE A. Pr an B. A C. W pr 1

8.0 J

OIN A. T If by B. P th C. D D. Sh w an

9.0 P

REH A. W Pr at B. T jo su us

0.0 T

AC A. T Sp B. D C. T re D. T pr ta

n the joint bev

E

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ATERIA rior to weldin nd other forei A fine film of r Weld-through rior to weldin . Solvents ap alcohol, iso Stoddard s NT

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IT

-U

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The root openi f the tolerance y machining o lates to be joi he welding op During the wel hell plates ma welded to the b nd the bottom

HEAT 

When the base rocedure Spe t or above the The preheat tem

oint and in adv urface pyrome sed directly in

CK

W

ELDS 

Tack welds sha pecification ( Defective tack Tack welds use

emain in the f Tack welds in rovided they a ack welds.

vel deeper tha

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ng, surfaces fo ign s that are d

rust adhered t primers, e.g., ng. pproved for u opropyl alcoh solvents. AND

A

LIGN

ing and fit-up es cannot be a or grinding. ined by butt w peration (see p lding operatio ay be aligned bottom before m plates. e metal temper cification (W e minimum pr mperature sha vance of the w eter, “Tempil n the weld zon

all be made b WPS. welds shall b ed in the asse finished joint w the bottom, ro are sound and

an 1/8” (0.125

C

LEANING or welding sh detrimental to to the joint ed Deoxalumin

use on the bas hol, acetone, m NMENT  tolerances sh achieved, the welding shall b paragraph 15. on, plates shal

by metal clip e continuous w rature is below PS). The bas reheat temper all be maintai welding. Preh stik,” or non-ne. y qualified w be removed or mbly of verti when the join oof, and circu d the subseque

5) shall be rep

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all be clean an o welding. dges need not

ite, Spatter-w e material and methyl ethyl k hall be as spec end preparati be matched ac A.3). ll be held in c ps attached to welding is sta w the minimu se metal shall ature prior to ined for a dist heat temperat mercury-type welders in acco r repaired prio cal joints of t nts are welded umferential jo ently applied paired prior to nd free from p be removed p weld, or Carbo d weld materi ketone, toluen cified in WPS ions may be b ccurately and close contact a the bottom p arted between um preheat te be heated suc welding. tance of at lea ture above 12 e thermomete ordance with or to welding tank shells sha d manually. oints of the tan

weld beads a

o fit-up and ta

paint, oil, rus

prior to weldi oweld 11, need

ials are methy ne, Varson 4,

S.

built up by we

d retained in p

at all lap joint lates, and the the bottom e

mperature sp ch that the sur

ast 3 inches on 5° F shall be er. Indicating c the Welding P . all be remove nk shell need are thoroughly ack welding. st, scale, slag, ing. d not be remo yl alcohol, eth Dowanol EB elding or re- p position durin ts. shell may be dge of the she

ecified in the rfaces to be w n each side of checked by u crayons shall Procedure ed and shall no not be remov y fused into th grease, oved hyl B, and prepped ng e tack-ell plate Welding welded are f the weld using a not be ot ved he

 

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11.0 B

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pplicable. ER

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ASS

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E nter-pass temp pecification ( Tempilstik,” o weld zone. f the temperat rocedure Spe ass temperatu LDING

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EC Welding voltag nd amperage r mandatory che erformed by t ecording equip Cracks or blow rinding, chipp hall not be use Before welding djacent base m or double-we hall be prepa ssure sound m The recommen hick unless oth

eening may b erformed unti asses, base, o

defect. After being lai

equence provi All welding pr n the Welding Welding shall pecification ( ERRUPTION Welding may b rocedure Spe

B

ACKING

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EMPERATU perature shall WPS and sha or non-mercu ture of the we cification (W ure, but not be

CHNIQUE  ge and amper range gages l eck or hold po the inspector u pment. wholes that ap ping, or air ca ed on quench g over previou material 1 inc elded butt join ared by suitab metal.

nded weld bea herwise speci be used to con il at least 3/8 in

r weld layers

d out and tack ided in Attach rocesses may b g Procedure Sp be performed WPS. N OF

W

ELD be interrupted cification (W

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AS  URE  l not exceed th all be checked ury-type therm eld is above th PS) the weld elow the minim

rage shall be in ocated on the oints. Voltage using calibrat

ppear on the su arbon arc goug hed and tempe

usly deposited ch on either si nts, before app ble methods ad thickness s ified in the W ntrol distortion n. depth of be requiring non ked, bottom p hment 2, unle be single pass pecification ( d single arc un DING  d without restr WPS). he maximum d on the surfac mometer. Indi he maximum i shall be allow mum preheat n accordance e welding pow

and amp rang ted voltage an urface of a we ging before de ered steel. d metal, all sl de of the weld plying weld m such as chip shall be 1/16 to Welding Proced n or to relieve evel has been

ndestructive e plates shall be ess otherwise s or multiple p WPS). nless otherwis riction, unless value specifi ce of the com cating crayon inter-pass tem wed to cool do t temperature,

e with the limi wer supply are

ge checks for nd amp meter

eld bead shall epositing the

lag and flux s d shall be bru metal on the s pping, grindin o 3/16 inches. P dure Specific e residual stre deposited. P examination. e joined by we specified by t passes per sid se specified in s otherwise sp ed in the Wel mponent using ns shall not be mperature spe own below th , prior to resum its specified o e for referenc r documentati rs or approved l be removed next bead. O hall be remov ushed clean. second side to ng, or air car Passes shall b ation (WPS). esses. Peening Peening shall n Peening shal

elding the join the Client. de unless othe n the Welding pecified in the lding Procedu g a surface pyr e used directly cified in the W he maximum i mption of we on the WPS. V e only and are ion purposes s d welding par

by filing, Oxygen gougi

ved, and the w

o be welded t rbon arc goug

be less than ½ g shall not be not be applied ll not be used nts in the erwise specifi g Procedure e Welding ure rometer, y in the Welding inter-lding. Voltage e not shall be rameter ng weld and the root ging to ½ inch e d to cover to mask ied

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15.0 I

NSP A. T au

16.0 A

CC A. B 1. 2 3. 4. 5. 6. B. F 1 2

17.0 W

EL pr PECTOR

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U The Inspector w uthorized by A CEPTANCE

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Butt Welds . As-welded coarse ripp . The surfac radiograph required. B a. W by res co b. Th c. Th ma At . The misali thickness o . The upper of the lowe maximum 5 /16 inch thi . The edges a maximum for horizon . The thickn shall not ex illet Welds . As-welded coarse ripp . The surfac nondestruc LD

R

EPAIR A. Defects f rior to repair. UALIFICAT who performs AL-KARRAR

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RITERIA d surfaces are ples, grooves, ce condition o hic and other n

Butt-welded j Weld ripples or y any suitable sulting from a onfused with t he weld surfac he finished su ay have a reas ttachment 1. ignment of co or 1/16 inch, w plate in comp er plate at any of 1/8 inch exc ick. of welds shal m permissible ntal butt joints ness of the rein xceed the amo

d surfaces are ples, grooves, ce condition o ctive examina RS  found in weld TION  s welding insp R and approv FOR

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OMP permitted; ho overlaps, abr f the finished nondestructiv joints to be ra r weld surface mechanical p any irregulari the image of a ce shall merg urface of the w sonable unifo ompleted verti whichever is th pleted horizon y point by mo

cept that a pro

ll merge with e undercut of s. nforcement o ount shown in permitted; ho overlaps, abr f the finished ations. ds shall be cal pection for ac ved by client. PLETED

W

owever, the su rupt ridges, an d welds shall b ve examination adiographed sh e irregularities process to suc ties cannot m any objectiona e smoothly in weld reinforce orm reinforcem

ical butt joints he larger.

ntal butt joints ore than 20% o ojection of 1/1 the surface o 1 /64 inch of th f the welds on n Attachment owever, the su rupt ridges, an d welds shall b

lled to the atte

cceptance to th

W

ELDS  urface of weld nd valleys. be suitable for ns when nond hall be prepar s on both the ch a degree th mask or be able defect. nto the plate s ement may be ment not to ex s of tank shel s of tank shel of the thickne 16 inch is perm of the plate wi he base metal n butt joints o 1. urface of weld nd valleys. be suitable for ention Client a this procedure ds shall be su r the proper in destructive ex red as follows inside and ou hat the radiogr

surface. e flush with th

xceed the amo lls shall not ex

lls shall not pr ess of the upp missible for up ithout a sharp for vertical bu on each side o ds shall be su r the proper in and approval e shall be ufficiently free nterpretation xaminations ar s: utside shall be raphic contras he plate or ount shown in xceed 10% of roject beyond per plate, with pper plates le

p angle. There utt joints and

of the plate ufficiently free nterpretation obtained e from of re e removed st n f the plate d the face h a ss than e shall be 1 /32 inch e from of

         

 

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B. W re C. P ad re D. C gr E. R w on be F. W co m ap

18.0 P

OST A. P pe

19.0 A

TT A. B as B. W th C. W da an Weld repairs sh estore a weld inhole leaks o dditional weld epaired. Cracks and all

rinding, mach Repairs of defe water level at l n or near the t een complete Welded repairs ontained oil, u manner. Repa pproved in wr T

W

ELD

H

Post weld he erformed in a ACHMENT Bars, clamps, t s the base ma When applyin hicker materia When the engi amage the ba nd grind the a hall be perfor to an accepta or porosity in d bead over th defects in she hining, or air c ects discovere least 12 inche tank bottom. ly blanked of s shall not be until the tank irs shall not b riting by the C

H

EAT

T

REA eat treatment accordance wi T

W

ELDS  temporary atta terial. ng attachmen al shall govern ineering speci ase material s area flush. rmed using th able condition tank-bottom j he defective a ell joints or sh carbon arc go ed after the tan es below the p

Welding sha ff.

attempted on has been emp be attempted o Client. ATMENT  when indica ith API-650 achments, etc nts to materia n. ification requ hall be utilize e original We n. joints or roof area. Other de hell to bottom ouging from o nk has been f point being rep all not be perfo

n a tank filled ptied, cleaned on a tank that ated in the W c. welded to th als of differen uires removal ed, e.g. cut, g

elding Proced

f joints may b efects or crack

m joints shall b one or both sid filled with wa paired or with formed on any with oil, or o d, and freed of has containe Welding Proc he base mater nt thicknesse of temporary grind, or air c dure Specifica e repaired by ks in tank bot be removed b des of the join ater for test sh

h the tank emp y tank unless c n a tank that h f gas or oil re d oil, except i cedure Specif rial shall be th

es, the prehea

y attachments carbon arc go ation (WPS) t applying an ttom joints sh by chipping, nt and re- wel hall be made w

pty if the repa connecting lin has previousl sidue in a saf in a manner fication (WP he same P- nu at requiremen , a method th ouge the attac to hall be lded. with the airs are nes have ly fe PS shall be umber nts of the

hat will not chment off