BROWN-MINNEAPOLIS TANK

PROCEDURE GVI-OO1

VISUAL INSPECT10N

,1.0 SCOge

This procedure details the practices used by BMT for visually inspecting welds.

References2.0

BMT Section VII' a.A. Manual.~j

2.2 ASME Section VIII, Division 1, Latest Edition and Addenda.

2.3 API-650 and API-620, Latest Edition.

AWWA, latest Edition.Z:4

~.o General

3,1 a.A. Technician/a.C. Leadman shall be capable of reading J.1 lettef'S on staIxiardJaeger eye test chart. a.c. Technician/a.C. Leadman shall be required to have an eyeexamination annually and a color vision test every three years.

3.2 The a.Ala.C. Supervisor shall be responsible for insuring the compet~e of the a.c.Technician/a.C. Leadman.

'3.3 When inspecting components in the plant, a flashlight shall always be used.

4,f) P raced u re

Inspection Edge Preparation4.1

Surfaces and edges to be welded shall be unifonT\ and shall be free of cracks, 9Ol'Je8.etc.. which could adversely affect the qualify of strength of the weld.

4,1.2 Surfaces to be welded and surfaces adjacent to a weld shaH be free of lose or thickscale, slag, rust, moisture, visible oxides and grease or oil that would affect the quaay ofwelding.

Edges of carbon steel bottom sheet and roof plates for field wekjing shal be coated withdeoxaluminite.r

BAOWN'M'NNEAPOll~ TANK

4.2 Fit-Up Inspection

Misalignment of plates shall not exceed the requirements shown on the Code ToleranceSummary Sheet (see attachment).

Gaps shall be within the limits shown in the welding procedure.

Tack welds shall be cleaned and inspected for cracks. Any tacks that are cracked shallbe removed.

Weld Inspection Shall Consist of the Following Criteria Which are Spot ChecksMade During the Perlormance of the Q.C. Technician/Q.C. Leadman NormalDuties.

4.3

Welders and operators have current qualifications.

4..3.2 Correct WPS is available at the work station.

Compliance with WPS.

Use of correct welding filler metal.

~t identif~ ~ekis-

Visual Weld Inspection Acceptance Criteria.4.4

No evidence of cracks.

No evidence of lack of fusion.

Undercutting is within code limits as shown in Exhibit 1

No evidence of pinholes.44 ~. ,"t

Fillet welds are correct size (Attachment A). Check by use of fillet gauges.

Visual and dimensional tolerances shall be within code limits as shown on Attachment B.4.4.6

Mark all Weld Joint Areas Containing Defects Clearly for Elimination of Defects.4.5

All re-welds and pick-ups shall be re-i~ected.'4.5.1

effecUVe Date: ~1/93ReviSion No.1

Page2of4

ATTACHMENT *, A'""-

PROCEDURE: GVJ-OOI

"; "'TtJ:Eoa~TI"A

l~'.": ~t.' \f~

;.".. THROAT.co', ,<

~

1HEo~ETr£;A;L" '..0 c

,THROAT:r-

/''"

t.SIZEtCONVEX FtL~~J

CQ~CAVE;_tl~j;l1f;

:~~11et;~~f'd;{$~t~;l~g,~~o:ftb,," largestin$cr;j;beq-rignt, ..." '

The'Ore.~1cal throat = O..r..X' :Slz~; .

EQQAL: LETpLt~E1_:,,~hD

~;rHE'9Rt;Tr~Al_: ..- ,,. "'~~'D Qk r~'.': 'J,nl:' ~ ':'< TfI~,()~ET;1~~.THROAT ,

-.f;,I'

~

A

§rit~OF".'Ell):'

cpt~ c~v~r;J~'CCOttVEX':FlltU.. '" ,-

For une,&- u~lc1.e g cfi llet.;'~elds~thes4::eo:f.. ' .c ." CC" "

the wet ~;is the:lcg '~~rig;thsd£~~~.l~r;gest.". lh ""\;;c' ' b ".,cco b' :J.. b .r1gilt tr1:ang :ew :lOll can e11\ScrJ; e~ 'V.~"t. In

1Qn'~' .,'c~,;!! !;,"

UNEfiUAL.tbGFILLBT' WELDx ~C'

~ Of;~; WELp

ATTACHMENT BPROCEDURE GVI-OQ1

TOLERANCES

1}2)3)4)5)6)

Height from bottom plate to rim % 1/4" up to 20'-0" plus % 1/8" per 10'of tank height thereafter.Specified location of any1hreaded or nozzle connection and manway % 1/4",

Face of nozzle from shell or roof % 1/8".Alignment of face of nozzle % 10 with reference to the ind~ated plane.Specified location of any internal or external clip or support bracket % 1/4".The maximum out-of-plumbness of the top of the sheD relative to the bottom of the shell not to exceed1/200 of the total tank height. The out-of-pluni>ness in one she" plate shall not exceed the valuesspecified for miU tolerances in Table 14 or Table 15 of ASTM SpecW~ation A6 or in Table 10 or Table 13 of

ASTMSpecif~ation A20, wh~hever is appl~able.

~

t~...

NOTE: See diagram below for applications

~~,.

~-

~~8dtS~

MIIaIIgn~oIPI8I..

Rounm Peaking!Banding

Weld

A81~T ;:

E8Ct1SIde

PI8Ie Th~

3116.101.

rtQr

MIl. ~ '*-

3{32.

118.

Thickne8s Lgog

To&11jcI. 112' 1/41Over Ifl.to 314' 1/8.Over 314. to 1.1/2' 1/8'

tc ThInrI8SI P~Thickri8Ss

~

1/41

1/41

3/16'

;)18 ~~1hei?irIimum-,...~~'shall not exceed i'r.QI the nominat

~.

No~AllowedASMEVIII

1I_.~. taw..3:-~~t.~ifed.

Using ~36'Iong~boardpeaking or

baflGngsh8ftn«8KcMd

112..

PtaI8~

Upk>&Jllcl;112"

~

1)64' Maxirr..m

Hadii _ured l'above ~Qlnol ~k:

~~c

~ \040' . ~ 1/2"

.o-~10 1~ ~ 3f4°1W ~1o2&1 ' ~ 1"

2SO'&Ovet ~ t-1'4-

Vall

Up to &18.: 1MS.5/8" & Up: 10'- or 1/8" ~-

~

1132'~

AP\.e50 ~

2(W. ~ pi'" t \0 . max; m ~1/8" (1/16" ~um lor plates lessthan Sl16") ~ 'J/16"1/2'&

Incl. ...~

1164' Max!mJm0Ier' 1/4

Using a ~

long ~-board. ~.ing or bandln;shall ~eXceed 1/2'

PIMe MaX;

1biI*rJ8J~.,

Yldtm

Uplo 112' .;~' j~1tr 101' "S' 3/16"0V8t-1~ 3116- f,.'

~

1$0 Mexi m

t'2IizQIII8I

1,'320 Maxln-.m

1J16. maxlmUmfOrp4ates114.ltIiCk orless,

25'10 of plate thickness or 1/8"Whichever is .~11er for p48te1over 114.,

~me_.-edt'--8bo11oin~1ank;

~IQ!tfI(g

up to 4lY * )!2.~liPto15O' is ,.w up to 2&Y * 1.

250' 4 0... ~ 1-1/4'

API.e20

~

1,~' Maximlm

~

1$' M8XilTalm

'tQ!ilQIJIII

'...32'~

~.ltie-' 1 ~ 01 pI- thlC~s or1/16', wI1~.. IS larger

As~mall..

~~~_than t16'AWWA tiQ"L\1ntII: 20'10 01 pial. thICkness

or 1/8" whjc~er ISSmAller Up 10112' ,VIS"

112" 101' ...~'I" .r.a!4' . , '8"

~~

Y.td~

3fJ2' 1/8"