Hot Tap Form Proposed Signatories

7/24/2019 Hot Tap Form Proposed Signatories

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Welding On Live Equipment, Hot Tap Procedure & Checklist Z!C"""#$WP%$E%"#

Singapore Chemical Plantand Refinery

Mechanical Work Practices Section-8 Metals (Fixed E!ipment" Work Practice

MWP-ME-8#$ Welding %n &i'e E!ipment )ot *ap Proced!re +Checklist

SME: Subject Matter Expert

________________________(Kee Ah Chye)

Approved ByDocument Owner:

Metals Maintenance Manager

________________________(Quey Joo Hiong)

Endorsed By: Cobine! "perations #roce!ure Coittee

________________________(Chairan)

Purpose: Hot tap applies to a connection made to a pipeline or vessel that is underpressure or has 'een depressuri(ed 'ut has not 'een cleared )or conventionalconstruction methods* +e)ore an hot tap operation is carried out, it must 'ethoroughl revie-ed and approved* This procedure outlines the control,responsi'ilities and sa)et requirements pertaining to Welding on Live Equipment.WOLE/, hot tap operations at !CP and !ingapore 0e)iner*

Precautions:Safety, Health,

Environmentaluality

Hot taps are carried out onl -hen it is impractical to take equipment out o)

service*

The -all thicknesses must 'e adequate to allo- -elding -ithout causing a'urn through on the pipe*

1mm or the calculated minimum thickness, -hichever is higher, )or pipin!

in service*

2*1mm or the calculated minimum thickness, -hichever is higher, )or

vessels.e3cluding tank/ in service*

or tan"re)er to 4P5 216 Ta'le 7*8* The hot tap connection si(es and

minimum shell thickness are 9

Connection !i(e, :P! .in*/ $inimum !hell Plate Thickness .mm/

;2 1*"

; 2*88 Last printed9 #=>88>#"81 8


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Procedure Steps:

%nitial)Date

4/ Preparation *or +eldin!

8* Hot tap locations are marked and veri)ied together -ith E$

E3ecution L!, E$ inspector and Operation Technician* E$0

#* The no((le stu' shall 'e a pre%)a'ricated piece done in the-orkshop environment* The -elded assem'l shall 'e inspected)or compliance -ith )lange alignment tolerances and clearances*

WECWD4>DC

6* The no((le stu' shall 'e accuratel aligned -ith the )lange )acesuch that the )ace is parallel to the pipe longitudinal a3is across thediameter*

WECWD4>DC

or responsi'le OperationTechnician to con)irm and monitor the )lo- 'e)ore proceeding -iththe -elding operation )or the no((le )it%up* E$0

+A#$%$&A +O#- 'O S'OP %* .O$D%'%O$S .HA$&E /%0E0

H1D#O.A#BO$ EA-S %$ 'HE A#EA, PE#SO$$E%$23#%ES, E'.040 'HE OPE#A'%O$ 'E.H$%.%A$ %S

'O BE $O'%*%ED %MMED%A'E10

1* Prepare the -eld area and )it%up the no((le* The no((le centerlineshould accuratel intersect the pipe centerline longitudinall* 4uni)orm gap o) 8*1 to 6mm 'et-een the hot tap no((le and pipe

sur)ace should 'e provided* .!ee 4ttachment #/ E$0

$"%E&-nless !eterine! by an engineering re.ie+ to be other+ise acceptable/ +el!ingor hot tapping closer than 01 inches to a lange or threa!e! connection/ or closer thanthe greater o 2 inches (34) or 5 ties the +all thic'ness o the hea!er pipe to a+el!e! sea (inclu!ing the longitu!inal sea o +el!e! piping) shoul! be a.oi!e!,

2* Ao not -eld on the inside o) no((les 2 inch :P! .81"mm/ andsmaller* Ensure the e3cess -eld metal )rom the root pass does note3tend past the inside diameter )or no((les 2 inch and 'elo- toavoid damaging the cutter* .!ee detail 4 in 4ttachment 8/ E$0

=* :o((les inch :P! .#""mm/ and larger should have a grinding )rom the outside to sound metal,the -eld should 'e completed )rom the outside* E$0

* se lo- hdrogen electrodes and no more than 8> inch .6mm/electrode diameter* Larger diameter electrodes ma 'e considered)or )ill passes i) the -all thickness is greater than or equal to 8>#inch .86mm/* E$0

7* 4)ter the completion o) no((le root pass -elding, the -eld shall 'evisuall inspected, 8""F PT or $T inspected 'e)ore proceeding

WECWD4>DC

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%nitial)Date

-ith the cover pass -elding*

8"*4)ter the completion o) no((le -elding and 'e)ore appling anspeci)ied rein)orcement pad, the completed -eld shall 'e visuallinspected, 8""F PT or $T inspected*

WECWD4>DC

88*Pressure test the no((le -ith a 'lind )lange installed* WECWD4>DC

8#*Test pressure should 'e at least equal to the operating pressure o)the line or vessel to 'e tapped, 'ut it should not e3ceed the presentinternal .operating/ pressure ' more than 8"F in order to avoidpossi'le internal collapse o) the pipe -all* 5) higher test pressure isrequired ' local codes or standards, i3ed Equipment Engineershall 'e consulted*

WECWD4>DC

86*The rein)orcement pad -elds should 'e visuall, and PT or $Tinspected, and the rein)orcement pad leak test .#1psig/ carried out*The tapped hole should not 'e plugged a)ter the test is completed*

Ho-ever, the hole ma 'e )illed -ith grease>sealant or to preventcorrosion due to moisture accumulation* 4)ter the hot tap is done,the tapped hole shall then 'e plugged -ith a steel plug*

WECWD4>DC

$"%E&6or non 7perpen!icular branch connections,Angle! branch connections shall only be use! +hen a 84!eg connection is not possible,9hen use!/ they shall be at least one si:e saller than the hea!er si:e

An internal gui!e shall be attache! to the angle! surace perpen!icular to the pilot !rillan! centere! on the angle! surace, A 5,3 gui!e plate (or si:e 2; an! belo+) shallalso be +el!e! to the en! o the straight section o the no::le to 'eep the no::leaccurately aligne!,

$"%E&6or large linesConsi!eration shoul! be gi.en to reinorcing the coupon to pre.ent it ro becoing latan! causing the cutter to bin! up, 6or spiral +el! seas/ reinorcing is re*uire! or 0services9

A0 .om7usti7le or flamma7le mi;ture.Hdrocar'on & 4ir -ithin )lamma'le range or -ith potential toenter )lamma'le range/ at an pressure*

B0 Acids, chlorides, ammonia, pero;ides, or other chemicals li"ely to decompose or 'ecomeha(ardous )rom the heat o) -elding* E3amples include sulphuric acid, 'utadiene pero3ide, hdro)luoricacid and acetlene

.0 4ir content in high purit ethylene or 7utadienelines e3ceeds 8"""ppm, or the pressure e3ceeds#""" Jpag .#7" Psig/

D0 Hydro!ena'ove 8""KC .#8#K/*E0 Hydro!enpartial pressure e3ceeds ="" Jpag in car'on steel lines or is -ithin 27" Jpag .8"" psig/ o)

the limit set ' :elson Curve**0 .austic service -here PWHT is required or steam%out o) caustic lines is per)ormed during

shutdo-ns>start%ups&0 Pure O;y!en, 'EAor .hlorineservice

H0 Air lines -here the a'sence o) hdrocar'on cannot 'e assured, e*g* instrument air lines -ithpossi'ilit o) lu'e oil

%0 2ac"eted Pipin! or 2ac"eted Stora!e 'an"s% Potential o) cutting through the internal vessel>pipe orsupport rods

20 Monelpiping handling sulphurcompounds-0 Stainless steelpiping containing .atacar7solution0 The pipe is made o) an air hardened alloy, as there is a risk o) metallurgical changes in heat a))ected

(one

services9A0 Hydro!en service 7elow 9==>.% 5t should 'e con)irmed that the pipe has not e3perienced hdrogen

attack* Con)irmed operation -ithin the :elson Curve limits o) 4P5%7sec .6 m>sec/, -ith the ma3imum kept as close to this value as possi'le*

*0 Butadiene % +utadiene, in the presence o) o3gen, can decompose e3plosivel* Aecompositionpressures and temperatures should 'e considered* 5) 'utadiene pero3ide is present in the line, hot

tapping is prohi7ited* 5n addition, during permitted hot tapping o) 'utadiene lines the cutting machineshould 'e purged o) all air to prevent )ormation o) 'utadiene pero3ide polmer in the hot tappingequipment* 5nspect the area to 'e hot tapped )or +utadiene pero3ide polmer* +utadiene pero3ide cane3othermicall react*

&0 Acetylene% Aue to thermal decomposition, hot taps on acetlene is prohi7ited-hen9a/ The line contains 1F or greater acetlene in ethlene or 'utadiene .liquid or vapor/'/ The line contains #"F or greater acetlene -ith other hdrocar'ons

H0 Air lines that are )ree o) hdrocar'on -ith greater than #6*1F o3gen* :itrogen purging ma 'erequired during hot tapping

%0 Dimethyl *ormanide /DM*4

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Appendix I

HO' 'AP &3%DE%$ES

8* P#OH%B%'ED HO' 'APS :o Hot Tap 4llo-ed

Hot taps are Prohi7itedunder the )ollo-ing conditions>services9










(one







20 *lamma7le or .om7usti7le i(uid Below Atmospheric Pressure% Provisions should 'e made to

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Appendix I

HO' 'AP &3%DE%$ES












(one







-0 &ases 3nder 6acuum% Ensure the sstem stas air%)ree ' maintaining a continuous purge -ith inert

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Appendix I

HO' 'AP &3%DE%$ES












(one







0 Pipe -all thickness is less than 1 mm*

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Appendix I

HO' 'AP &3%DE%$ES












(one







M0 Line 4:!5 temperature>pressure rating e3ceeds 2"" lange 0ating

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Appendix I

HO' 'AP &3%DE%$ES












(one







$0 Deviation from #e(uired 6elocities or -elding on liquid service, )lo- is -ithin "*sec %

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Appendix I

HO' 'AP &3%DE%$ES












(one







P0 Hi!h 'emperatures % Piping operating at a process temperature a'ove =1" .


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Appendix I

HO' 'AP &3%DE%$ES












(one







0 ow 'emperatures% Hot taps that -ill 'e made at lo- temperatures Me*g*, car'on steel 'elo- 88 Last printed9 #=>88>#"81 8


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Appendix I

HO' 'AP &3%DE%$ES












(one







#0 P+H'% Piping & storage tanks that require PWHT according to applica'le codes, standards, and>or

0ev* 8, 8"=>88 Last printed9 #=>88>#"81 8


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Appendix I

HO' 'AP &3%DE%$ES












(one







S0 Brittle *racture% Equipment that meets a level 6 'rittle )racture assessment .grand%)athered/ requires

0ev* 8, 8"=>88 Last printed9 #=>88>#"81 8


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Appendix I

HO' 'AP &3%DE%$ES












(one







'0 Stress .orrosion .rac"in!% !tainless steel su'Bect to chloride stress corrosion cracking should 'e

0ev* 8, 8"=>88 Last printed9 #=>88>#"81 8


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Appendix I

HO' 'AP &3%DE%$ES












(one







30 Em7rittlement % !pecial evaluation o) the -elding procedure -ith respect to process side metal

0ev* 8, 8"=>88 Last printed9 #=>88>#"81 8


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Appendix I

HO' 'AP &3%DE%$ES












(one







60 Hydro!en *issurin!% or services in -hich aqueous or room temperature hdrogen )issuring ma

0ev* 8, 8"=>88 Last printed9 #=>88>#"81 8


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Appendix I

HO' 'AP &3%DE%$ES












(one







+0 inin!, .laddin!, Overlay% or piping & tanks -ith internal linings, cladding or -eld overla, the

0ev* 8, 8"=>88 Last printed9 #=>88>#"81 8


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Appendix I

HO' 'AP &3%DE%$ES












(one







?0 .oncrete and #efractory ined Pipe% or piping -ith concrete or re)ractor linings, the potential )or

0ev* 8, 8"=>88 Last printed9 #=>88>#"81 8


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Appendix I

HO' 'AP &3%DE%$ES












(one







10 .ast %ron ines% sing a -elded )itting is prohi'ited on cast iron lines, a commercial 'olt%on )itting

0ev* 8, 8"=>88 Last printed9 #=>88>#"81 8


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Appendix I

HO' 'AP &3%DE%$ES












(one







@0 3nder!round Pipe% or underground lines that run through a casing, 'e sure that the -ork is done

0ev* 8, 8"=>88 Last printed9 #=>88>#"81 8


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Appendix I

HO' 'AP &3%DE%$ES












(one







AA06essel 8 E;chan!ers % 0estricted regardless o) temperature, pressure and contents

0ev* 8, 8"=>88 Last printed9 #=>88>#"81 8


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Appendix I

HO' 'AP &3%DE%$ES












(one







BB0The location of hot tapis -ithin 2""mm o) )langed or threaded connections, as the heat )rom -elding

0ev* 8, 8"=>88 Last printed9 #=>88>#"81 8


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Appendix I

HO' 'AP &3%DE%$ES












(one







0ev* 8, 8"=>88 Last printed9 #=>88>#"81 8


29/43


Appendix I

HO' 'AP &3%DE%$ES












(one







0ev* 8, 8"=>88 Last printed9 #=>88>#"81 8


30/43


Appendix I

HO' 'AP &3%DE%$ES












(one







:otes9

0ev* 8, 8"=>88 Last printed9 #=>88>#"81 8


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Appendi; %%

+ED%$& O$ %6E E3%PME$')HO' 'AP *O+ SHEE'

0ev* 8, 8"=>88 Last printed9 #=>88>#"81 8


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0ev* 8, 8"=>88 Last printed9 #=>88>#"81 8


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Appendi; %%% A /Page , of $"

DES%&$ *O#M

+ED%$& O$ %6E E3%PME$' /+OE4 8 HO' 'APPart % : &eneral %nformationThis )orm is to 'e completed ' the + contact engineer>processdesigner to initiate the hot tap process, on%stream -elding )or linepadding and detailed engineering, as part o) the PA! or $OC*

Aate " 4pril #"86 ++0O00E Hot 'ap Stopple

$OC > o' :o* 9PD=C P&5A :o* ESPA==A???. Tie%in :o* 'Phr/

:ormal lo-. /

:ormal ?elocit.m>sec/

% Liquid "*< % 8*6 m>sec %

% ?apor "*< % 6 m>sec %

E3pected Composition, -tF :itrogen Operatin! Density

.List all components Q 1F/

0easons )or Aeviating )rom lo- 0equirements & Wh is it 4ccepta'leR .Consult i3ed Equipment Engineer/

0ev* 8, 8"=>88 Last printed9 #=>88>#"81 8


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Appendi; %%% A /Pa!e < of Process Heads have the authorit to

approve>reBect the hot a)ter revie- o) the request -ith special precautions and proceduresproposed* +T$> Process Heads ma also escalate to )ull !OC revie- as appropriate*

4n other deviation )rom the procedure shall require !OC approval*

Approvals

Process Aesigner >Contact Engineer :ame>!ignature Aate

$anu)acturingCoordinator.$C/ > Operations

nit !upervisor :ame>!ignature Aate

i3ed EquipmentEngineer.E/ :ame>!ignature Aate

+T$ > Process Head:ame>!ignature Aate

!OC . onl i) required/

0ev* 8, 8"=>88 Last printed9 #=>88>#"81 8


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%nstructions)&uidelines for Desi!n *orm for +OE 8 Hot 'ap

5! THE WOLE>HOT T4P NO 40E P0OPO!5:@ 0E4LLN :EEAEARThis question should 'e asked ever time there is an urge to make connections ' hot tapping into e3isting )acilities* 4ntime -e propose ahot tap or WOLE -e are e3posing personnel and equipment to conditions, -hich i) not evaluated thoroughl, can 'e unsa)e* Hot taps have'een and can 'e per)ormed sa)el, 'ut should 'e minimi(ed* The should onl 'e used -here9 5t is impractical to emplo conventional methods*

5t is impractical to take the equipment out o) service* 4 huge cost incentive e3ists*

Taking equipment out o) service ma pose more risks than hot tapping*

Each hot tap must 'e evaluated individuall ' using sound engineering Budgment and ' considering all potentiall adverse conditions*@eneral guidelines to )ollo- at the design stage98* Check to see i) process )luid is suita'le )or a sa)e hot tap* Equipment handling ethlene, 'utadiene, acetlene or -here the heat o)

-elding ma induce e3plosion or other ha(ardous reactions -ithin sstem shall 'e approved ' ull !OC*#* !peci) the min and ma3 )lo- required at the hot tap>WOLE location to dissipate the heat* $a3 )lo- is speci)ied to prevent

e3cessivel rapid cooling o) the -elded area and to avoid the coupon )rom dislodging*6* Hot tapping o) air lines or lines containing e3plosive mi3tures are not permitted*o' no* P&5A si(e piping specs operating and design conditions*5) the hot tap required is a si(e on si(e, )urnish a Busti)ication )or si(e on si(e* !i(e on si(e should 'e avoided i) possi'le, consider hottapping a si(e smaller and e3panding line si(e a)ter the hot tap valve*

Part 559 Hot Tap > WOLE Aetail & lo- Esta'lishment4 )lo- schematic is required )or the hot tap > WOLE* The schematic should clearl indicate9a/ Line num'er and location o) hot tap*'/ Equipment, valve or instrument used to measure or esta'lish the required )lo-*c/ 4ll valves to 'e tagged )or -elding and cutting activities*d/ 4ll relevant 'ranches )or the sstem*e/ Location o) an temporar connections used to esta'lish the required )lo-*

5t is necessar to maintain a min )lo- in the pipe during -elding in order to dissipate -elding heat* Conversel, it is sometimes necessarto impose a limit o) ma3 )lo- rate in order not to quench the -eld & contri'ute to hard -eld cracking or )usion pro'lems .Higher velocitiesma 'e used -ith special coupon retainers*/9a/ 5n gas services, a min )lo- rate should 'e tpicall "*< m>s .8*6)t>s/ )or -elding* or cutting, the ma3 )lo- rate should generall 'e

limited to 6 m>s .8")t>s/ to minimi(e the likelihood o) spinning the cut coupon and having it dislodged* $a3 )lo- is not critical )or vaporservice -elding*

'/ 5n liquid services, the )lo- rate )or -elding should tpicall 'e kept in the range o) "*< to 8*6 m>s .8*6 to < )t>s/* or cutting, -et steamshould 'e considered as liquid*

The )lo- rates to 'e esta'lished must 'e endorsed ' the manu)acturing coordinator>operation supervisor and responsi'ilit )or monitoringthis rate must 'e indicated* lo- rates speci)ied should 'e consistent -ith the monitoring )lo- meter reading*

!peci) the composition o) the stream to 'e hot tapped* 0e)er to !CP !a)et Procedure $anual )or a list o) compounds that require specialattention -hile carring out hot taps or WOLE*

Part 5559 Other Precautions4* 5) the hot tap is at the suction o) machiner, such as compressors or gear pumps, etc* then a machiner e3pert should 'e consultant*

Ensure )acilities, such as strainers, are availa'le upstream o) the machine to prevent chips and shavings )rom reaching the machine*

4lternativel, there ma 'e a possi'ilit to carr out the hot tap -hile 'passing the equipment -ith minor adBustments to the process*+* i3ed equipment engineer should revie- this )orm and indicate i) an )urther precautions are required, such as PWHT, piping liners &!tress Corrosion Cracking impacts, etc*

C* 5ncase the coupon is dislodged, prior evaluation and planning should 'e carried to see -here it is most likel to settle* 5ts long> shortterm impact to process and equipment should 'e high%lighted here*

A%@ highlights the strategies )or the given situations, i) di))erent o) usual emergenc response* 5) a special procedure is required )or an o)these, this should 'e indicated and procedures should 'e developed ' Operations !upervisor prior to e3ecuting the hot tap*

Part 5?9 !OC 0evie- & 4pproval Provide reason )or carring out the Hot Tap, and accepta'le deviations*

The Process Aesigner>Contact Engineer .or other author o) this )orm/ should sign here along -ith $C>Ops !upervisor and i3ed

equipment Engineer and o'tain the )inal approval )rom Process Heads .!CP/ or +T$ .0e)iner/

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Appendi; %%% BME.HA$%.A *O#M

+ED%$& O$ %6E E3%PME$' A$D HO' 'AP

P#O2E.''%'E:

Sin!apore Sulphur Disposition Proect

'he E(uipment to 7e welded on has 7een appropriately identified with the Mechanical Planner ) *Sand clearly mar"ed0

nit !upervisor>$anu)acturingCoordinator.$C/ :ame9

!6 Ops !ignature9 Aate9

All re(uired $DE has 7een completed and the location found to 7e accepta7le for weldin!0

nit 5nspector :ame W D4DC !ignature9 Aate9

P#O.ESS .O$D%'%O$S P#%O# 'O +ED%$& S Operations

Are process conditions on the +0O00E0 ) Hot 'ap *orm still validG 1ES ) $O

%s the velocity specified in Desi!n *orm correctG 1ES ) $O

> $o/ Contact Engineer shall ha.e the #rocess @esignerM"C Author re.ise the 9"=EHot %ap @esign6or an! attach it ater re.ie+ing it +ith Manuacturing Coor!inator"ps Super.isor,

> es/ Contact Engineer shall Sign an! return to Mechanical #lanner

nit Process Contact Engineer:ame9

S Ops !ignature9 Aate9

nit !upervisor>$anu)acturingCoordinator :ame9

S Ops !ignature9 Aate9

%s there special weldin! or testin! procedures /See Attached4 1ES ) $O

i3ed Equipment .E/>

5nspection Engineer :ame9

W D4DC !ignature9 Aate9

Additional #e(uirements

SO. 6ariances *orm Attached, if #e(uired NE! > :O

A .opy of $DE #eports Attached /*urnished 7y 3nit %nspector4 NE! > :O

Special Procedures #e(uired as identified in the Hot 'ap Desi!n *rom Appendi; %%%A NE! > :O

$echanical Planner>ProBect Engr>

E$ E3ecution L! :ame9

E$0 !ignature9 Aate9

0ev* 8, 8"=>88 Last printed9 #=>88>#"81 8


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Appendix III C%$SPE.'%O$ *O#M

+ED%$& O$ %6E E3%PME$' A$D HO' 'AP

94 *ield 'hic"ness Measurements /

rd

Party %nspector4

8a/ Thickness $easurement Equipment /rdParty %nspector4

3' Meter Pro7e .ouplant 3sed:

62AL A=7"!$ !ound sa)e Copper !lip High Temp* Couplant

Please tick .

/ the appropriate 'o3

8'/ Thickness Aata /rdParty %nspector4

%MPO#'A$' $O'E O$ 'H%.-$ESS MEAS3#EME$'S9

'H%.-$ESS MEAS3#EME$' PO%$'S M3S' BE BASED O$ MA#-EDO3' P#O*%E O* 'HE A.'3A +ED%$& O.A'%O$0

0ecorded Thickness .mm/

Location 8 # 6 < 1 2 = tmin .min* recorded/

4

+

?eri)ied ' 5nspector 9 W D4DC:ame>!ignature>Aate 5nspected

*O# %$SPE.'%O$ #E*E#E$.E O$1 $ew Pipin! +all 'hic"ness in mm to Sch $o0

3' E3%PME$' &3%DE%$ES/EE0CFE0FI4

:o((le!i(e

O*A* !8" !#" !equipment thickness, t r, as speci)ied ' Engineering Aesign !ection is9 mm8

.8'ased on Aesign Pressure9 JPag Aesign Temperature9 oC, and includes 6mm )or H4Z/

#'/ is the minimum line>equipment thickness, tmin.as veri)ied ' 5nspection !ection/, adequate )or onstream -eldingR

.i*e* min* recorded thickness, tmin Q tr/ 5NE!>:O

i3ed Equipment Engineer9 E$0E :PDC

:ame>!ignature>Aate

4 %nspection re(uirement /others4 *+ A.

6a/ T scans )or lamination* Completed on9

6'/ T scans on a))ected longitudinal seam o) e3isting pipe* Completed on9

6c/ Hot%tap valves tested as per Piping $aintenance @uide Completed on9

6d/ $O$ > $O$ third part surve Completed on9

0evie-ed and released )or Hot%tap ' 4rea 5nspector:Ooi !oo JenJJJJJJJJJJJJJJJJJJJJJJJJJ

0ev* 8, 8"=>88 Last printed9 #=>88>#"81 8


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:ame>!ignature>Aate

Appendi; %%% D

6E$DO# HO' 'AP DA'A *O#M /After +OE done4 'D+

ProBect Title9 !ingapore !ul)ur Aisposition ProBect

+usiness nit9

Work Order :o*9

lange>stu' alignment check -ithin tolerance 9 Nes > :o

2OB

P,A$$E# ield ?eri)ication 5n)ormation .)ill in in)ormation, attach cop o) isometric and send to vendor/9

Overhead clearance )rom )lange to nearest o'stacle9

Orientation o) line to 'e hot tapped9 Hori(ontal ?ertical

Orientation o) hot tap no((le on line9

4verage -all thickness determined ' ultrasonic measurement9

$inimum 5*A* o) no((le connection and valve9

.$ust )ield veri) this measurement/

Travel dimension .O*A* o) header to )ace o) connecting )lange/9

:ame >!ignature9

Phone >a39

Aate9

6E$DO#

#EP#ESE$'A'%6E HOT T4P ?E:AO0 0E!PO:!E9 .)ill in in)ormation and return to o' Planner/

4*

+*

C*

Cutter tooth material9

:um'er o) teeth on cutter9

$odel no* o) hot tapping equipment9

Po-er requirements9 ?endor :ame9

!pecial requirements9 !ignature>Aate9

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Appendi; %6&3%DE%$E *O# HO' 'AP MA.H%$E .HE.-S P#%O# 'O

%$S'AA'%O$

f any of the follo.ing points are !nsatisfactory rectify /efore installation0 *1W

P%O'

5s the pilot the correct si(e and lengthR

:um'er o) -ires con)orm to document

Ensure cutting edge in not pitted or 'lunt .dull/

Wires should )all )reel during rotation o) pilot

Wire protruding out #%6 mm circum)erentiall )or holesa- and 6%1mm )orstandard pilot > cutter?isual check )or de)ects e*g* hairline cracks

.3''E#

Ensure cutting edge in not pitted or 'lunt .dull/

Check cutter si(e con)orms to ?endor Aata )orm and compare -ith stu'5A?isual check )or an de)ects e*g* hairline cracks

HO' 'AP MA.H%$E

Check $achine model con)orm to ?endor Aata )orm

Ensure hdraulic hoses>)ittings are in good condition

Correct seals and packing usedR$achine must 'e serviced and pressure tested* ?endor to producecerti)icationlanges are o) correct ratingR

'%&H'$ESS 'ES'S #E3%#EME$'S 'D+

'o .hec" the %nte!rity of the *lan!es and Hot 'ap ) Stopple Machine Assem7ly

Testing $edium 4ir :itrogen Others

Leak Test Pressure to 'e at least 1"psig 'ut not e3ceeding the operating pressure o) the line orvessel to 'e hot tapped

Test Pressure9 Jpag>PsigChecked '9

Hot tap !pecialist Technician :ame9 TAW!ignature9 Aate9

E$ E3ecution L! :ame9 E$0!ignature9 Aate9

0ev* 8, 8"=>88 Last printed9 #=>88>#"81 8


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Attachment 9 'appin! valve, Adapter and .uttin! machine setup

2%*E3 4 For si5e on si5e hot taps !se single-piece f!ll encirclement saddle(i0e0 no55le shall /e one-piece .ith saddle" .ith f!ll fillet .elds0

Detail A +eld details

0ev* 8, 8"=>88 Last printed9 #=>88>#"81 8V ma3* electrode to -eld

no((le to pipe electrodes larger

than 8>V ma 'e used to Bointsections o) rein)orcement

+leeder % or releasing

pressure on tapping machine

Tapping $achine

4dapter

Tapping ?alve

Pressuri(ed Line

or

?essel

V5:TE@04LLN

O0@EA 5TT5:@V

V!ET O: :OZZLE 5:!T4LL4T5O:

W5TH !EP404TE 0E5:O0CE$E:TV

8>


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Attachment < Measurin! noKKle centerline and stu7 ali!nment chec"

2%*E3 1etermine centre of main pipe + ens!re hot tap st!/ is on centerlineCheck flange le'elness after installing st!/

Hot tap stu'Centre o) main pipe

$ain pipe

2%*E3 Meas!re dimensions 6a6 and 6/6 as sho.n d!ring fit !p check0

Centerline o) 'ranch pipe

measure dimension VaV measure dimension V'V

0ev* 8, 8"=>88 Last printed9 #=>88>#"81 8


42/43


Attachment L Additional #e(uirement for Stopplin!

!topples are used to per)orm repairs or to remove a section o) line -ithout interrupting service*

Hot tapping is a prerequisite )or installing stopples and all the requirements )or hot taps appl tothe installation o) stopples*The stopple must provide a tight seal* !topples have de)inite limitations and it must 'edetermined that the stopple is adequate )or the line si(e, temperature and pressure* The materialchosen )or the stopple cups must also 'e resistant to the line environment* When a vendor isused, the must have demonstrated e3perience in stoppling lines o) similar si(e, temperature,pressure and service*or si(e%on si(e hot taps )or stoppling, a )ull encirclement rein)orcing pad must 'e installed toprovide additional -all thickness in case the cutter cuts into the pipe -all* The diameter o) thestoppling cutter is almost the same as the inside diameter o) the pipe* 4 straight hot tap cutter hasa smaller diameter and provides some clearance 'et-een the cutter and the pipe -all*

or stopple -orks the detailed -ork sequence and checks shall 'e developed ' specialistcontractor and revie-ed -ith the o-ner* The sequence shall include the installation o) the stopplemachine to the removal o) the stopple machines*

The ma3 )lo- rate )or insertion o) stopple is #*8 m>s .= )t>sec/ )or liquid service and 1 m>s )or gas*or single stopple .i*e* there is a upstream or do-nstream isolation valve availa'le/, the lineshould 'e static*

4)ter the stopple is installed, it should 'e tested )or leaks ' 'leeding the isolated section o) theline* 5) a leak is )ound, the stopple should 'e repositioned and rechecked )or leaks* 5) the leak stillpersists, the stopple should 'e removed, reinserted and retested* The operation must 'erepeated until a tight seal is o'tained*

0ev* 8, 8"=>88 Last printed9 #=>88>#"81 8


43/43


#E6%S%O$ O&:

Para 'itle #ev #ev Date Description

Documents

Hot Tap Form Proposed Signatories