GOM D iving S afety W ork G roup - usgomdswg.comusgomdswg.com/PDF/US GOM DSWG Underwater Burning...

ThisregulatioThe rea

G

s US GOM Don is containader should

US

GOM D

CO

SWG documned herein. consult add

S GOM DivinCommitt

iving S

OMMITTE

JAN

DI

ment is not mThe US GOMitional resou

informat

ng Safety Wotee Work Gr

1

afety W

EE WORK

N 2014

SCLAIMER

meant to be aM DSWG doeurces and sution as requ

ork Group roup

Work G

K GROUP

4

all inclusive,es not issue bject matteired.

Group

, and not evepolicy or crer experts for

Revis

ery rule andeate regulatr more deta

sion 0

ions. iled

The GOM

oil and ga

contracto

promote a

Purpose

T

C

Diving Safety

s operators, t

ors, organizati

and improve

• identif

• identif

• review

• provid

e of Comm

his docume

Committee C

Executive S

Tre

Dav

US

y Workgroup

transmission

ions and indu

diving safety

fication and s

fy and seek so

w and comme

de input to the

mittee

nt has been

Chairman

Sponsor

Comevor Day

vid Gilbert

S GOM DivinCommitt

Underw

is a US GOM

companies, c

ustry stake ho

, through the

sharing of bes

olutions to in

nt of existing

e regulators a

prepared b

Gary

Ted

mittee Me

Underw


2

water Bu

focused, non

commercial d

olders. The g

e following:

st practices

dustry challe

g and propose

and industry a

by the US GO

y Kane

Roche

embers (N

water Bur

ork Group roup

urning

n‐competitive

diving compan

group will pro

nges and issu

ed standards

associations

OM DSWG a

ames OnlyPa

J

rning

e and non‐com

nies, supporti

ovide a unified

ues

and guideline

s guidance f

y)aul Woodhal

Jack Couch

Revis

mmercial gro

ing sub‐

d voice to

es

for:

ll

sion 0

oup of

The doc

P

P

P

P

P

P

P

cument is

art 1: Execu

art 2: Defini

o Define

regula

art 3: Regul

o Identi

activit

betwe

art 4: Past In

o Identi

and th

for th

art 5: Hazar

o Identi

with t

to red

art 6: Drills

o Provid

possib

art 7: Appen

o Please

docum

docum

depth

US

divided int

tive Summa

ition

es the activit

atory or indu

atory and In

fies regulato

ty or operati

een these gr

ncidents

fies past nea

he root caus

e hazard ana

rd Analysis

fies the haza

the hazards,

duce or elimi

and Prepara

de a list of d

ble emergen

ndix

e do not alte

ments it rela

mentation, r

h or relevant

S GOM DivinCommitt

to seven s

ary

ty that is be

ustry groups

ndustry Gap

ory and indu

ion and prov

roups as it re

ar misses, in

se of the inci

alysis in Part

ards of the a

and provide

inate risk

ation

rills that sho

ncy situation

er the templ

tes to other

eports, draw

information


3

ections:

ing evaluate

s that are ass

Analysis

ustry associa

vides a visua

elates to the

ncidents, and

dent in orde

t 5.

activity or op

es specific m

ould be perfo

s

ate, in order

r committees

wings, etc. in

n to the repo

ork Group roup

ed and provi

sociated wit

ation require

al aid to dete

e activity

d fatalities a

er to provide

peration, Ide

mitigation co

ormed to pr

r to maintain

s, but please

n this section

ort.

des definitio

h the activit

ements to pe

ermine the c

nd provides

e supporting

entifies the r

nsiderations

epare the cr

n the consist

e add additio

n that may p

Revis

ons from

ty.

erform the

consistencie

s causal facto

g documenta

risks associa

s for each ha

rew membe

tency of the

onal

provide more

sion 0

s

ors

ation

ted

azard

rs for

e

e

Part 1: E

Underwainjury or The frequnderwa This Commanagemexecutio When prscope thtechniqushears, d When it must be thoroughmitigatioidentificabeginnin Divers enachievedrecomme

Part 2: D Oxygen‐a

of the ch

the arc b

directed

away. Th

process a

Executive Su

ater burningfatality unleuency of diater burning

mmittee wasment of thisn of this ope

ractical, elimhat can be ces. Alternatdiamond wire

is not pracput in plac

h risk assesons to keep ation of thg the burnin

ngaged in ud through tendations)

Definition

arc cutting is

hemical reac

brings the me

through a tu

he tip of the

and needs to

US

ummary of C

g is a high riess performever fatalitiecontinues to

formed ands activity aneration.

minate undecompleted ttive cutting e, water jet

tical to elime to managssment shothe diver fre material ng operation

nderwater btraining, kn

s defined as

ction of oxyg

etal to its kin

ubular cuttin

electrode, w

o be replaced

S GOM DivinCommitt

Committee

sk / critical ed to a high es, injuries, io be unacce

d the follownd provide c

erwater burnthrough themethods mcutting, hyd

minate undege the risks ould be undrom being iand surrou

n.

burning neenowledge a

the oxygen

gen with the

ndling tempe

ng electrode

which is expo

d by the dive


4

diving activstandard byincidents, aptably high w

wing guidanccontrol mea

ning and cue use of memay include,draulic hand

erwater burnof the cuttidertaken ton harm’s wunding cond

d to be comand experie

cutting pro

e base meta

erature and

e at the heat

osed to both

er at regular

ork Group roup

vity that prey well‐trainend asset dawithin the g

e has beenasures and g

utting operaechanical cubut are nottools and ex

ning, sufficieng operatioo identify pay. Ventingditions mus

mpetent in tence. (See

cess in whic

al at elevate

then a high

ted spot. The

h heat and o

r intervals. (

sents a poteed and compamage occurglobal diving

developed tguidance to

ations by deutting or ott limited toxplosives.

ent safeguaons. Advancepotential risg requiremest be unde

the task. The Appendix

ch metal is s

d temperatu

velocity jet

e metal oxid

oxidation, is

(IMCA D 003

Revis

ential for sepetent persorring while industry.

to assist witensure the

eveloping a ther interve: hydraulic s

rds and cone planning asks and ideents and poerstood prio

is competen 1 for tra

evered by m

ures. The he

of pure oxyg

dizes and is b

consumed i

3)

sion 0

erious onnel. using

h the e safe

work ntion saws,

ntrols and a entify sitive or to

nce is aining

means

eat of

gen is

blown

in the

Part 3: R

The folloadditionarevision burning.

Item De

1 Pe

2 M

3 Si

4 JS

egulatory an

owing docual informatiof each of t

IMCA D 0

ADCI – C

OGP Rep

U.S. Nav

IMCA D 0

escription of

ermit Require

MOC Use

te Specific HA

SEA/JSA

US

nd Industry

uments weron and guithese docum

003 Rev. 1, G

Consensus Sta

port No.471 ‐

vy Underwat

045, R 015 –

Item IMCA

ed Yes

Yes

AZID Yes

Yes

S GOM DivinCommitt

GAP Analys

re referencedance on uments should

Guidelines fo

andard Rev.

‐ Oxy‐arc un

er Cutting an

– The Safe Us

A ADCI

No

No

No

Yes


5

sis

ed in deveunderwater d be referen

or oxy‐arc cu

6 ‐ Section 5

nderwater cu

nd Welding

se of Electric

USCG OSH

No No

No No

No No

No No

ork Group roup

lopment ofOxy‐Arc cutnced when

utting

5.31 ”Weldin

utting Recom

Manual, Do

city Underwa

HA OGP

Yes

No

Yes

Yes

f this Guidatting operatplanning to

ng and Burni

mmended Pr

oc.# S0300‐B

ater

Comments

Underwater

diving activit

managed by

Work proces

The decision

use underwa

be decided p

cold cutting

considered a

If circumstan

UW burning

an MOC and

assessment

completed.

Should be re

A JSEA is rec

diving activit

UW burning

Revis

ance or protions. The l use underw

ing”

actice

B‐MAN‐010

r burning is a

ty and should

y the Permit t

ss.

n to use or no

ater burning

prior to the jo

options shou

as primary m

nces change a

g becomes req

d associated r

should be

equired

commended f

ties, especial

g.

sion 0

ovide latest water

0

critical

d be

o

ot to

should

ob; all

uld be

ethod.

and

quired,

risk

for all

ly for

Item De

5 Al

6 CoSu

7 CoDi

8 Gaen

9 DC

10 WSo

11 BrSw

12 Dibe

13 NoG

14 G

15 Sp

16 Co

escription of

lternate Cutti

ompetency ofupervisor

ompetency ofiver

as venting anntrapment

C Output only

Welding Poweource

reaker or Knifwitch

iagrams of itee burned

o Through Wround

round Size

plices

ontinuity/ Po

US

Item IMCA

ing Yes

f the Yes

f the Yes

d Yes

y No

r Yes

fe Yes

em to Yes

ater No

No

No

larity Yes

S GOM DivinCommitt

A ADCI

Yes

Yes

Yes

Yes

Yes

Yes

Yes

No

Yes

No

No

No


6

USCG OSH

Yes No

Yes Yes

Yes No

Yes Yes

No No

No No

Yes No

No No

No No

No No

No No

No No

ork Group roup

HA OGP

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Comments

It is recomm

alternative c

should alwa

UW burning

Recommend

competency

Recommend

competency

Specific draw

should be de

the job, expe

training sho

venting tech

Only DC out

machines sh

Power requi

attached as

Breakers are

Site specific

diagrams sh

and reviewe

No through

Ground lead

determined

circumstanc

Splices shou

minimum

Leads should

and machine

Revis

mended that

cutting metho

ys be used in

g.

d supervisor

y

d diver prove

y

wings and dia

eveloped prio

erience and

uld include p

hniques.

put welding

hould be used

irement matr

appendix.

e recommend

drawings and

ould be deve

ed prior to the

water ground

d size should b

by project sp

ces

uld be kept to

d be load test

e polarity ver

sion 0

ods

lieu of

proven

n

agrams

or to

roper

d.

rix is

ded

d

eloped

e job

ding.

be

pecific

a

ted

rified.

Item De

17 Ox

18 Oxho

19 Ox

20 Ox

21 To

22 Ro

23 PP

24 Tr

25 Be

26 Cu

27 FlCh

escription of

xygen quality

xygen cleaneose

xygen Regula

xygen Pressu

orch

od

PE

raining for bu

ell location

utting metho

owcharts / hecklists

US

Item IMCA

y No

d Yes

ator Yes

re Yes

Yes

Yes

Yes

rning No

Yes

ds Yes

Yes

S GOM DivinCommitt

A ADCI

No

No

No

No

No

No

Yes

No

No

No

No


7

USCG OSH

No No

No No

No No

No No

No No

No No

Yes Yes

No No

No No

No No

No No

ork Group roup

HA OGP

Yes

Yes

Yes

Yes

Yes

No

Yes

Yes

Yes

No

Yes

Comments

Oxygen qua

burning perf

Proper hose

oxygen clean

to safe oper

High flow re

recommend

Suggested m

recommend

in Appendix

Standardize

inspected, m

tested as pe

recommend

Should be ba

be cut, and p

conditions

Proper PPE

Written and

are critical fo

operations,

recommend

Should be a

and diver aw

requirement

Should be st

through trai

HAZID

Example flow

Revis

lity can affect

formance

e selection an

ning are esse

ration.

egulator

ded.

manufacturer

dations are inc

. Torch shoul

maintained an

er manufactur

dations.

ased on mate

project specif

is required

practical tra

or safe burnin

see appendix

dations.

addressed in H

wareness

ts

tandardized

ning class and

wchart in App

sion 0

t

d

ntial

cluded

d be

nd

rer

erial to

fic

ining

ng

x for

HAZID,

d

pendix

Item De

28 EqPM

29 SpSt

30 Sp

31 Co

32 Cl

Part 4: P

This sectiunderwatan explosinclude ththe torch

Year Lo

1947 H

1969 Z

1968

1970

1977

escription of

quipment CerMS

pecific Procedteps

pecific Amp S

ontractor Che

ient Checklist

ast Incident

on lists someter oxy‐arc busion caused fhe numerous was blown o

ocation

USA, Hawaii

AftediveoveAriz

New ealand

Cutund

USA Undhoscon

UK Div

USA

Salvbeeundafte

US

Item IMCA

rt and Yes

dural Yes

etting Yes

ecklist Yes

t No

ts

e of the docuurning. In mofrom trappedun‐reportedut of the dive

er the bombingers spend abouer two years. Tzona probably

tting up the wrderwater explo

derwater Oxy Aspital, never renductor, impro

er killed in an e

vage operationen in the waterderwater exploer an underwat

S GOM DivinCommitt

A ADCI

No

No

No

No

No

umented injurost of these ind hydrogen g incidents wher’s hand or c

g of Pearl Harbut 20,000 hourTwo divers diedunderwater ox

reck of the ferrosion

Arc Explosion sturned to divinperly vented.

explosion duri

ns on the tanker two hours coosion, reportedter explosion”


8

USCG OSH

No No

No No

No No

No No

No No

ries and fatalncidents the as or hydrochen a blow‐bcaused his ear

Details

bor, it was estirs underwater d on operationxy arc explosio

ry “Wahine” at

seriously injureng. Second div

ng salvage ope

er “Sansitena” nducting oxy‐ad as “diver stric

ork Group roup

HA OGP

Yes

Yes

Yes

Yes

Yes

lities over throot cause ofcarbons. Theback or explosrs to ring for s

mated that theon major salvans cutting into tons

t the entrance

ed but recoverver burning on

erations

in Los Angelesarc cutting opecken with bend

Comments

Preventive m

recommend

Procedure a

developed a

to mobilizat

dive briefing

Suggested m

recommend

in Appendix

Should be re

Should Be re

e past sixty yf the injury oe incidents lission occurredseveral hours

e Navy and civage operationsthe wreck of th

to Wellington

red after a year a damaged

s harbor, diver erations, gas pods when he sur

Revis

maintenance

ded

nd cut plan t

and reviewed

ion and durin

g.

manufacturer

dations are inc

equired

equired

years attributr fatality wassted below dd, instances ws.

Fatality

vilian s lasting he

2

Harbor, 1

r in

1

had ocket, rfaced

sion 0

o be

prior

ng pre‐

cluded

ted to s from do not where

y

Injury

1

1

Year Lo

1978

1980

1981

1984

1986 I

1990 Sin

1991

1993

1993 Sin

1993 Ho

1999

1999

1999 Ca

2001

2003

2004

2004 G

2004

2005 Ro

ocation

UK Div

Brazil Oxydive

USA Divan ewit

UK Divblow

USA llinois

Divpos

ngapore Div

USA

ChaundTheincianc

USA

Divexphelmarre

ngapore Div

onduras Divcoa

UKCS Div

GOM Divope

USA, alifornia

We

GOM Div

GOM P &insu

GOM Divtec

GOM OxyIMC

GOM Oxywor

omania Div

US

er was killed in

y/arc torch noters died of bur

er was oxy arcexplosion occuh his diver hat

er was oxy‐arcwn in, rupture

er died in an essibly burned in

er killed in an u

asing hangers aderwater exploe incident led tident was a machors”

er cutting a wiplosion on the dmet off. The inest

er died in an u

er died while pastal freighter.

er died in oxy a

er died in undeeration.

lder diver, 'die

er died in Miss

& A job. Oxy Arufficient ventin

er received 3rdhnique

y Arc explosionCA SF 05/04)

y Arc explosionrk. (See IMCA

er died in unde

S GOM DivinCommitt

n a burning exp

t working, takerns

cutting well courred. The diveand harness o

c cutting, rended eardrums, ri

xplosion durinnto a pocket of

underwater ex

after doing an osion, face plato a brief and inajor factor in th

ndow in the 10diver’s radio. Tnjured diver lat

nderwater exp

performing und

arc explosion.

erwater oxy ar

ed in an industr

sissippi river ba

rc cutting, H2 bng. No JSA, MM

d degree burns

n, Ship's plate,

n, tank, salvageSF 05/04)

erwater burnin


9

Details

plosion undern

en back to the

onductors in aer was found unoff. He was bro

ered unconscioght side pneum

g a ship salvagf methane give

xplosion in an u

inside burn offte blown in, dronformal morathe introduction

0 ¾ inch casingThe standby divter died in the

plosion during

derwater cutti

HSE prosecuti

rc explosion, im

rial accident' a

arge salvage jo

build up, exploMS report, no p

s, Broco BR 22

diver unconsc

e diver perfora

ng during salva

ork Group roup

neath a small b

bell for checki

pproximately 4nconscious andought to the su

ous by an explomothorax, resc

ge operation oen off by the fe

underwater pil

f below the muowned. torium on insidn of the 'T' typ

g. Surface persver found him decompressio

a salvage oper

ng operations

ion, (See IMCA

mproperly vent

at Los Angeles

ob, oxy arc exp

sion, fatality. personal detail

defective man

ious/dizzy, 3 d

ted both eardr

age of the 'Rost

barge or tanker

ng, flash fire, t

45 feet of wated tangled in hirface unconsc

osion. Face placued by bellma

n a sunken corermenting corn

le cutting oper

ud line resulted

de burn offs anpe faceplate scr

sonnel heard aunconscious a

on chamber of

ration on a shi

to raise a sunk

A SF 07/01).

ted tank on a s

Harbor

losion

No proper drals

nufacturing plu

ays off work.

rums, 37 days

tok' from the D

Revis

Fatality

r. 1

two 2

er when s hose ious.

1

ate an

rn barge, n.

1

ration 1

d in

nd this rew 1

n and his cardiac

1

pwreck. 1

ken 1

1

salvage 1

1

1

wings, 1

us bad

(See

off

Danube 1

sion 0

y

Injury

1

1

1

1

Year Lo

2006

2007 Ind

2007

2008 F

2008

2008 Phi

2009 T

2010

2011 G

ocation

GOM Undtoo

donesia Div

GOM Divdec

France Div

GOM Div

ilippines 2 difeet

Turkey Salvdive

GOM Pos

Georgia Twoof tacc

GOM

Cutaftetheandthebotof shec

Tot

US

derwater Oxy Aoth, sore ribs. 3

er killed in an e

er was killed inck plate, with h

er was killed c

er had a bilate

ivers injured cut” Hospitalized

vage diving opeer injured in an

st 'Katrina' ‐ di

o scuba divers the sunken Ukrumulated insid

tting up of the er gas dive bur drilling derrickd was cutting it surface." and ttom he sees wscrap (gas trapck is that?" the

tals

S GOM DivinCommitt

Arc explosion, 3 weeks off wo

explosion cutti

n explosion usihydrogen and h

utting up a sun

eral traumatic p

utting up wrecd with breathin

eration on then underwater e

ver killed in un

were killed in rainian ship, thde the ship

wreck of the "rning box after k. The diver hat free of bottomgoes back to t

what looks like ped in the scra supervisor res


10

Details

knocked uncoork

ing into the hu

ng a grinder tohydro‐carbon b

nken boat, und

pneumothorax

ck “Trapped airng difficulties, l

wreck of the fexplosion durin

nderwater oxy‐

an underwatehe explosion co

High Island III"box of rods, cu

ad rigged up tom. Diver says, the bell to watca huge (20 to 3ap pile) The divsponded. "The

ork Group roup

nscious, facial

ull during salva

o cut vent holebuild up under

derwater oxy/a

x following bur

r explosion knolater released.

ferry 'Hayak N'ng cutting shee

‐arc explosion.

er explosion woould have been

" ‐ "There we wutting up a beno a big pile of I‐"OK get up on ch the load com30ft) cloud comver asks the sue bomb you we

lacerations, ch

ge operations.

es on a fallen str the plate.

arc explosion

rning explosion

ocked divers of

', 1 diver killedet metal

.

orking on the sn caused by hy

were making gant and twisted‐beam and angthe load it's frme up. As it cleming up underpervisor, "Where building."

Revis

Fatality

hipped

. 1

tructure 1

1

n.

ff their

d and 1 1

1

salvage ydrogen 2

as dive d pile of gle iron ree to ears r this pile hat the

28

sion 0

y

Injury

1

1

2

1

8 11

Part 5: H

Item

1

E

2 E

3

E

4 E

5 E

azard Analy

Hazard Identified lectric Shock

lectric shock

lectric Shock

lectric Shock

lectric Shock

US

ysis

Risk Asswith H

Injury to tor diver

Injury to d

Injury to d

Injury to d

Injury to d

S GOM DivinCommitt

ociated Hazard topside

diver

diver

diver

diver


11

Ensure gearup by traine

Check all werepairs, thequalified pe

Repairs to wwaterproof

Clean the kn Ensure thatelectrocutio

Ensure the w AC power swelding duecurrent und

The diver shbooties, andglove.

Establish a gmachine (poclamp is attgrowth.

The Diver shground or w

A diver is atperforming partially imhabitat).

The diver shgloves and b

Proper grouis critical to

Do not toucinsulated pa

Do not toumetallic par

When burnchanging elthe torch inacknowledg

This safety pthe electrod

ork Group roup

Mitigation

r is in workinged personnel.

elding leads fese repairs shoersonnel.

welding cablefing adhesive,

nife switch an

t the knife swon to the ope

welding mach

hall not be use to the extrederwater.

hould wear atd rubber glov

ground to theositive termintached to an a

hould never gwork; he coul

t risk from seva cutting or wmersed in wa

hould wear fubooties if wo

und placemen preventing e

ch the helmetart of the ele

ch the work wrt of the diver

ing is stoppedectrodes. Thin cutting positges MAKE IT C

precaution isde type or cu

Considerati

g order, good.

for damage aould be done

es should be m, wrap and ta

nd all electric

witch is kept derator.

hine frame is

sed for undereme danger in

t a minimumves with leath

e work from tnal), make suarea cleaned

get between td become pa

vere electricawelding operater. (e.g. spla

ull rubber werking partially

nt (to keep dielectrocution

t with the electrode holde

with the metar’s dress. d, signal MAKis must alwaytion until the COLD.

s recommendrrent setting

Revis

ions

d condition an

nd make nece by trained

made with ape (3M or si

cal connection

ry to prevent

grounded

rwater cuttingnvolved with

: a wetsuit jacher or Kevlar o

the welding re the groundof rust or ma

the torch andrt of the circu

al shock whenration while oash zone or

t suit, insulaty submerged

iver out of cir.

ectrode or anyr or torch. al helmet or a

KE IT COLD beys be done. Ke supervisor

ed regardless

sion 0

nd set

essary

milar)

ns.

t

g and AC

cket, outer

d arine

d the uit.

n only

ted .

rcuit)

y un‐

any

efore eep

s of

Item

6 E

7 E

8 E

9 E–

10 E

11 E

12 E

Hazard Identified lectric Shock

lectric shock

lectric Shock

lectric Shock – Knife Switch

xplosion

xplosion

xplosion

US

Risk Asswith H

Injury to t

Damage tEquipmen

Injury to t

Injury to dtopside pe

Injury to d

Injury to t

Injury to t

S GOM DivinCommitt

ociated Hazard the diver

o nt

the diver

diver or ersonel

diver

the diver

the diver


12

Use of throground clambetween th

Use of throvessel’s hul

Verify corretest, place eand make th(Straight Pofrom the ro

It is extremecorrectly. Tmounted, aknocked or circuit woul

Electric hazcareful plac

Underwatemixtures thcompartmeshould be flunsure abothe vent ho

Ensure thatvent hole at

The diver shareas of thedirect line ocharge and whatever is

Explosions hArterial GasDDC shouldjobs regard

Escaping hysite; do not

Never burn explosive su

ork Group roup

Mitigation

ugh‐water grmp placemenhe torch and t

ugh water grol or facility fro

ect polarity ofelectrode andhe torch “hotolarity) a smaod tip

ely importanthe switch muand located sovibrated closld be broken.

ard in dive cocement and c

r burning creat are highly ents, enclosedlooded or puut the conditoles should be

t gases cannot its highest p

hould keep hie body (larynxof the cut; an focus the pows in front of it

have caused s Embolism od be immediatless of depth

ydrocarbons c burn if hydro

into a space ubstance, alw

Considerati

round is discot should not the ground.

ound discourom electrolys

f the torch byd ground in bt”, if the polall stream of b

t to mount thust be positiveo that it cannsed. Should th.

ontrol should orrect mount

ates hydrogeexplosive. Ald space, strucrged with wation of the coe cold cut.

ot be trapped point.

is face plate ax and chest) aexplosion cawer of the ex.

pneumothoran various incitely available

can accumulaocarbons are

containing anways drill or sa

Revis

ions

ouraged; the position the d

raged; damagsis.

y using the buucket of seawrity is correctbubbles will co

he knife switcely acting, rigot be accidenhe switch fall,

be mitigatedting of knife s

en/ oxygen l closed ctures or pipeter and ventempartment o

by providing

and soft tissuaway from thn act as a shaxplosion to

ax and then idents, therefe on all UW cu

ate at the worpresent.

n unknown oaw your vent

sion 0

diver

ge to

ucket water t ome

ch gidly ntally , the

d by switch.

elines ed. If or pipe

a

e e ape

fore a utting

rk‐

r .

Item

13 E

14 E

15 E

16 E

Hazard Identified xplosion

xplosion

xplosion

xplosion

US

Risk Asswith H

Injury to t

Injury to t

Injury to t

Injury to d

S GOM DivinCommitt

ociated Hazard the diver

the diver

the diver

diver


13

Grinding is cgenerated b

Do not use hydrogen /gthe object b

Below mud‐weight coattendency to

It is recommburning belmaterial be

When possi

Always knowThere may bconcrete, msection) whpotential fo

Cutting on sknuckles. Beknuckles pr

BEFORE comDiving Supeshould meephysically idworked on.

The dive suwater the afollowed pr

The initial p Before cuttthe surface,seawater anpipelines in

ork Group roup

Mitigation

considered a by the grindin

grinding to vegas/hydrocarbeing cut.

‐line cutting, ting or cuttingo build up larg

mended to reow the mud‐eing cut shoul

ible vent with

w what is behbe; hydrocarbmud, voids duhich could proor explosions.

sheet piles cae sure to havoperly vented

mmencing anervisor and diet with compadentify the pi

pervisor shougreed upon prior to beginn

penetration sh

ing on any pi, vented to atnd flooded. Ifternal condit

Considerati

hot process ng disk.

ent if there isrbon pockets

cutting on pig against a grge quantities

emove weight‐line the backd be jetted to

h inert gas or

hind the matebon solid, lique to scantlingoduce gas poc.

an trap gas in e area in vicind.

ny burning opvers who willany representpeline, condu

uld verify withprocedure/cuning the UW b

hould be drill

peline it shoutmosphere, flf there is any tion it should

Revis

ions

due to the sp

s the possibilion the back s

ipelines with rout backing h of trapped g

t coating andkside of the o vent the gas

air.

erial being cuuid, or gas, aig shape (crossckets with the

pockets of thnity of these

erations, the l do the worktative and uctor or riser

h the diver inut plan is beinburn.

ed or saw cut

uld be openedlushed with doubt about NOT be cut

sion 0

park

ty of side of

have a ases.

d when

s.

ut. ir, s e

he

k

to be

n the ng

t.

d to

the

Item

17 Efi

18 F

19 F

20 F

21 DP (

Hazard Identified xplosion or re

ire

ire

ire

Differential ressure Delta P)

US

Risk Asswith H

Injury to d

Injury to t

Injury to t

Injury to t

Injury to d

S GOM DivinCommitt

ociated Hazard diver

topside

topside

topside

diver


14

Do not operremoved. Ddamage to t

Do not burntorch, this cspark arrestextremely d

NITROX shocutting is pethe free flow

Prior to hoobottles are falling over.

Ensure thatfree from gr

Ensure O2 and repair a

Have propefighting equ

Hydrocarbopresence ofcomponent

Due to the fwaterproofconducted iflames or spburning lea

Delta‐P canwelded toplikewise a ponly under

Be aware ofpressure (flto check for

Keep body, any area of these items

If Delta‐P is equalized (e

ork Group roup

Mitigation

rate the torchDoing so may the torch.

n the rod dowcan cause damtor, it also madifficult.

ould not be userformed. Hiw or exhaust

oking up Oxygsecured in a .

t valve outlet,rease, dirt an

equipment isany leaks

erly trained firuipment.

ons ignite almf oxygen. Nevts to come in

flammability fing compounin a well‐ventpark producind or torch int

exist on platside before tpipeline that ia single atmo

f body positioood pipeline)r or prevent D

hoses, tool laDelta‐P, the s and drag a d

present, staye.g. flooded)

Considerati

h with the spcause injury t

wn to within 1mage to the cakes removin

sed on dives wigher oxygen could lead to

gen to the torrack to preve

, regulator annd other forei

s properly hoo

re watches w

most spontanever allow oxygcontact with

and toxicity onds, waterprotilated space,ng machineryto the bell.

tform membehe platform ws open endedosphere.

on, when pos), use “tattletDelta‐P.

anyards and cin‐rush of wadiver into har

y back and veand inform to

Revis

ions

ark arrestor to the diver a

1‐2 inches of collet, washerng the rod stu

where oxy‐arconcentratioo explosions.

rch ensure thent them from

nd all fittings ign matter.

oked up, chec

with in‐date fir

eously in the gen‐carrying oil or grease

of fumes fromoofing must b, clear of any y. NEVER take

ers if they wewas installed,d on the surfa

ssible verify zetales” and diff

clothing awayater may pull m’s way.

erify item hasopside

sion 0

and

the r or b

rc ons in

he m

are

ck for

re‐

.

m e open e a

re , ace is

ero fusers

y from in

Item

22 B

23 B

24 Wb

25 C

26 BC

27 Cp

28 T

29 Lo

Hazard Identified

Burn

Burn

Welding flash urn

Chemical Burn

Bell Contamination

Crush or Pinchoints

rapped Diver

ow Visibility

US

Risk Asswith H

Injury to dtopside

Damage tumbilical

Eye injurytopsides personnediver

n Injury to t

n Injury to d

h Injury to d

r Diver

Diver

S GOM DivinCommitt

ociated Hazard diver or

o

y to

l and

the diver

diver

diver


15

Wear propematter howinfected

Molten slaghose, umbil

When testintenders aregloves and w

Divers shouwhen burnisufficient.

Distillate orburns to unwearing dryexposed are

Combustionand hydrocaBe sure the aware of cu

Evaluate thin bells duri

Increase thebell checks.

The burninginto the bel

Be aware ofand stay oubacks, anchobjects from

Pipelines orwithout wato be out of

Umbilical mburning to pdamage fro

Be aware ofmaterial beand always

Ensure qualoperations,before cutti

Take adequand discuss

ork Group roup

Mitigation

er PPE when bw minor since

g or sharp melical managem

ng the burnine wearing prowelding hood

uld wear a bung in clear w

r petroleum pnprotected sky suits and apeas to preven

n by‐product,arbons must bell is in an aurrents.

he use of a hying salvage /

e required Ox.

g lead/ torch ll.

f body placemut of line of firhors, chains om sudden mo

r platform merning, alwaysf line of fire b

management iprevent poteom falling stee

f body placemeing cut. Ensuready

lified divers a do not makeing.

uate time for ts potential ha

Considerati

burning, repoburns can ea

etal can damament is impor

ng gear on deper PPE includ with #8 lens

rning lens onater, #4 lens

products can cin, divers shopply a dermal nt irritation

, oxygen or hynot enter thearea below cu

yper‐gas hydrburning oper

xygen conten

should never

ment, anticipare, consider tr come‐a‐lonovement after

embers may ss verify the dibefore beginn

is important antial for entrael.

ment, anticipaure standby d

are used in lowe guesses and

the diver to azards with to

Revis

ions

ort all burns nasily become

age the diver’rtant.

ck insures theuding: Rubbers minimum.

their helmets is usually

cause chemicould consider protective ge

ydrogen bubbe bell atmosputs/vents, be

rocarbon monrations.

nt monitoring

r be brought u

ate stored enhe use of holgs to preventr they are cut

shift or breakver has safe sning the cut.

at all times wapment or ho

ate and dictadiver is qualifi

w visibility d always verif

assess the situopsides.

sion 0

no

s

e r

ts

cal

el to

bles, phere.

nitor

in the

up

nergy d‐t t.

k free spot

while ose

te ed

fy

uation

Item

30 CP

31 DED

32 RE

33 RE

Part 6: D

Item

1 E

2 Ure

3 Inre

Hazard Identified

Cuts and unctures

Diving quipment Damage

Rigging quipment

Rigging quipment

Drills and Pre

Drill Nam

lectrocution

Unconscious decovery drill

njured diver ecovery drill

US

Risk Asswith H

Topside a

Topside a

Crane / Wcable dam

Nylon stradamage

eparation (sp

me

Drill Peele

diver Pediv

Pe(Cu

S GOM DivinCommitt

ociated Hazard nd Diver

nd diver

Winch mage

ap

pecific to Un

rform drills oectrocution ‐ r

rform drill to ver has been i

rform drill to ut Leg, broken


16

Wear propeand chaps

Burning equhoses shoulthat is in anpower, hyd

Insure rigginthis could dfailure

Insure that molten slagedges.

nderwater O

n how to hanremove the e

simulate thein an oxy‐arc

simulate then arm, straine

ork Group roup

Mitigation

er PPE, Kevlar

uipment highld not be run ny way conneraulic, or gas

ng componendamage the w

nylon slings sg. Nylon strap

Oxygen‐arc c

Describe Dr

ndle a topsideelectrical haza

e recovery of aexplosion.

e recovery of aed back)

Considerati

r gloves (over

amperage ca in any cable cted to divingservices.

nts are not cawire rope and

stay clear of hps are not to b

cutting)

rill

e man down dard first. a unconsciou

a conscious y

Revis

ions

r the rubber o

ables and oxytray (or similg system elec

ausing groundcause rigging

hot areas andbe used on sh

due to

s diver – assu

yet injured div

sion 0

ones)

ygen ar) ctrical

ding, g

d harp

ume

ver

Part 7: A

Item

1 R

2 D

3 P

4 F

5 IM

6 AM

7 B

Appendix

Appendix

Recommenda

Diagrams

Photographs

Flowchart

MCA Safety F

Amperage andMatrix

Broco

US

Item

tion UW

Sho

Sho

Shotor

Sho

Sho

Sho

Fla

Int

To

Flo

Flashes Exc

Exc

Exc

d O2 We

BR

S GOM DivinCommitt

W Burning ‐ Tr

ows proper a

ows venting p

ows proper brch and groun

ows correct k

ows proper g

ows drag met

ammable resid

ernal Stiffene

rch damage f

owchart exam

cerpt from IM

cerpt from IM

cerpt from IM

elding machin

22 Leak test p


17

De

raining and C

nd improper

pipelines with

burning gear nd)

knife switch se

round clamp

thod of cuttin

due in a pipe

er Rings Insid

from burning

mple from IMC

MCA Safety Fla

MCA Safety Fla

MCA Safety Fla

ne and O2 PS

procedure

ork Group roup

escription of

Competency R

venting tech

h over‐bends

set up (weld

et up

placement

ng

line

e of Member

rod up into c

CA D 003

ash 07‐01

ash 10‐03

ash 05‐04

I settings for

f Item

Recommenda

niques

ing machine,

rs

collet

steel & exoth

Revis

ations

knife switch,

hermic rods.

sion 0

, O2 ,

Appendix

Divers encompeteperform make thebasis andrequirem Recomm

Fo

Fo

Foa

C

P

S Recommlimited to

Ev

R

M

O

E

V

G

St

D

H

S

C

Experiencan be practical The diver

specific b

x 1 : UW Bu

ngaged in uency is achiein‐house quese availabled this documments.

ended train

ormal dive s

ormal dive s

ormal dive snd visibility

ompany in‐h

re‐job “task

upervisor le

ended itemo the follow

valuation of

isk identifica

Management

Oxy‐arc UW b

quipment se

Venting

Grounding

tored energy

Differential P

Hydrocarbon

imultaneous

utting Rods

ce level anddocumentedtesting.

qualification

urning operat

US

urning ‐ Trai

underwater ved throughualifications e to the cliement does

ing requirem

school classr

school instru

school dry (conditions.

house classr

‐specific” qu

d training an

ms to be incling:

f alternative

ation and m

t of Change

burning theo

election and

y

ressure

s sources

s Operations

and techniq

d competend through l

s should be m

tion/task.

S GOM DivinCommitt

ining and Co

burning neeh training, knfor their supent for revienot intend

ments may in

room instruc

uction for eq

topside) an

oom trainin

ualifications

nd mentorsh

luded in the

cutting met

itigation

process

ory

set‐up

s

ques

cy are extrelog books,

matched to th


18

ompetency R

ed to be trnowledge anpervisors anw. The trainto set speci

nclude the fo

ction

uipment set

d in‐water i

g and in‐wat

with materi

hip based on

e UW burni

thods

emely imporin house p

he hazards ass

ork Group roup

Recommend

rained and cnd experiencnd divers to ning criteria ific training,

ollowing:

t up

instruction w

ter qualifica

al mock‐ups

n diver’s exp

ng training

rtant in the performance

sociated with

dations

competent ce. Diving Coverify their may vary o, experience

with various

tions

s

erience

should inclu

qualificatioe reviews, a

h and the com

Revis

in the task.ompanies shcompetencyon a case bye or compet

s rods, mate

ude, but are

on process; tand written

mplexity of th

sion 0

. This hould y and y case tency

erials,

e not

these n and

e

US

Ap

S GOM DivinCommitt

ppendix


19

x 2 : Dia

ork Group roup

agrams

s

Revission 0

USS GOM DivinCommitt


20

ork Group roup

Revission 0



21

ork Group roup

Revission 0

Groun

nding C Clam

Diver’s Tor

US

DoubThrow

mp

rch Head

S GOM DivinCommitt

ble Pole Singw Knife Switc

Never groundleads odeck afalling o


22

gle ch

coil excess bd leads whileover hand raway from fooobjects

ork Group roup

H

burning and e burning. Drail or flake ouot traffic and

DC W 40

Oxygen BoHigh Flow Re

ape t on

Revis

- +

Welding Mac00 to 650 am

ttleegulator

sion 0

+

chinep

Groun

R

nding C Clam

Diver’s Tor

Dive ControRemote Swit

Off

On

US

mp

rch Head

oltch

f

S GOM DivinCommitt

Never groundleads odeck afalling o

DCC


23

OHig

coil excess bd leads whileover hand raway from fooobjects

C Breaking Contactor

ork Group roup

Oxygen Bottleh Flow Regu

burning and e burning. Drail or flake ouot traffic and

DC W 40

eulator

ape t on

Revis

- +

Welding Mac00 to 650 am

sion 0

+

chinep

Thiknifvoltthe

This endRED to tBlack to

s is the incofe switch hatage of the w

e handle of th

d toward the the torch heathe groundin

US

orrect methondle is up, t

welding mache knife swit

diver.adng C clamp

S GOM DivinCommitt

d. When thehe full

chine is at tch.


24

e

ork Group roup

This is theknife switcis up, therepart of the

This eThe topositiv

e correct waych. When thee is no volta

e switch.

end to the weorch head is ve side of the

Revis

y to connecte switch hanage on the kn

elding machconnected te machine. (

sion 0

t the ndle nife

ine.to the (RED)



25

ork Group roup

Revission 0

C

B

B

C

It

W

A

WAR

utting on she

e sure to hav

elow mud‐lin

utting against

is recommen

When possible

lways know w

US

RNING: Cu

eet piles can t

e area in vicin

ne cutting has

t a grout back

nded the back

e vent with in

what is behin

Alternativ

S GOM DivinCommitt

tting on sh

rap gas in po

nity of these

s a tendency t

king has a ten

kside of the m

ert gas or air

d the materia

ve cutting


26

heet piles i

ckets of the k

knuckles prop

to build up la

ndency to bui

material being

.

al being cut.

methods

ork Group roup

is not reco

knuckles.

perly vented.

rge quantitie

ild up large q

g cut should b

are recom

ommended

.

s of trapped g

uantities of t

be jetted to v

mmended.

Revis

d.

gases.

rapped gases

vent the gas.

sion 0

s.

Appendix

This pipeextremelwas mad

x 3 : Photog

eline was flusly flammablede to use alte

US

graphs

shed and thee residue thaernative cutt

S GOM DivinCommitt

e plan was tat had built ting method


27

o burn it, thup over the ds.

ork Group roup

his image shoyears of ser

ows the amorvice. Thankf

Revis

ount of fully the dec

sion 0

cision

Interna

Internal st

angle gas

member w

stiffeners

al Stiffener

tiffener rings

could be tra

was cut with

would be a b

US

r Rings Ins

found inside

apped on the

a diamond w

bad day.

S GOM DivinCommitt

ide of Mem

e of VD and sk

e topside of t

wire saw and g


28

mbers

kid beam mem

he pipe even

gas of some s

ork Group roup

mbers on this

n though it a

sort did escap

s platform. If

ppears to be

pe. Burning b

Revis

a member is

e open ended

below one of

sion 0

s at an

d. This

these

During div

did this se

needle no

burning to

torch blew

spark arre

valve vapo

ver training se

everal times r

ose pliers. Th

orch gets sen

w up (no injur

estor screen w

orized.

US

ession, we ha

requiring the

is is one habi

t topside to r

ry to the dive

was vaporized

S GOM DivinCommitt

ad a diver wh

burning torch

it we work on

remove a sho

er, except sca

d, and the oxy


29

o wanted to b

h to be sent t

n to stop, as it

rt stub. The t

red him). The

ygen hose/fit

ork Group roup

burn the rod

to the surface

t's dangerous

third time he

e torch outer

ttings betwee

all the way to

e to remove t

s and wastes

e burnt the ro

r housing was

en the torch a

Revis

o the torch. H

he rod with

time when th

od too short, t

s fine, but the

and the oxyge

sion 0

He

he

the

e

en

Appendix

x 4 : Flowch

US

hart exampl

S GOM DivinCommitt

e from IMCA


30

A D 003

ork Group roup

Revis

sion 0

Appendix

Excerpt f

5 O

The inveidentifieddiver waon the sp The comoxy‐arc c

O

Aop

Saco

D

Dri

So

Swpsu

Oflro

x 5 : IMCA S

from IMCA S

Oxy‐Arc Cu

estigation ind that the ms ignited by pool directly

pany involvcutting:

Oxy‐arc cuttin

Any oxy‐arc peration anarticular tas

upervisors snd that coommencing;

Divers who u

Divers who asks and risk

upervisors af gas entrap

upervisors awhere gas crobably requfficient;

Oxy‐arc equiowing throuod, creating

US

Safety Flash

Safety Flash

tting

nto a diver most likely caa spark. Th

y below the c

ed has issue

ng should on

cutting opend a specifisk need to be

should ensuntrol are c;

se oxy‐arc e

re to carry ocontrol met

and oxy‐arc ement, creat

and oxy‐arc eould be trauire creatio

ipment opeugh the rod. an explosio

S GOM DivinCommitt

es

07‐01

fatality on ause of the ee gas was licavity.

ed the follow

nly be used i

eration needc task plane in place;

re all hazardlearly speci

quipment sh

out oxy‐arc cthods to be a

equipment oing a potent

equipment oapped is con of a vent

erators shouHydrogen frn hazard.


31

a subsea sexplosion wakely to have

wing instruc

if there are n

ds the apprn and risk a

ds have beeified, comm

hould be tra

cutting shouadopted;

operators netial explosion

operators nempletely vehole. Flushi

uld not enerom electrol

ork Group roup

structure inas that gas te been gene

ctions to its

no practical

roval of theassessment

en identifiedmunicated a

ined in its u

uld be fully a

eed to ensurn hazard, pr

eed to ensurented beforng the cavit

ergize the Blytic action c

nvolving oxytrapped in a erated durin

personnel r

alternatives

e relevant mcovering th

d, the risk pnd in place

se;

aware of and

re that thereior to strikin

re that any pe striking tty with air is

Broco rod ucan otherwis

Revis

y‐arc cuttingcavity abovg the oxy‐ar

regarding su

s;

manager forhe detail of

properly assee prior to

d understan

e is no possing an arc;

potential loche arc. Thiss not likely t

unless oxygse build up i

sion 0

g has ve the rc cut

ubsea

r that f the

essed work

d the

ibility

cation s will to be

en is n the

Excerpt fExcerpt

3

A membduring uconditio

from IMCA St from IMCA

Diver Fata

ber has adviunderwater ons and sequ

US

Safety Flash Safety Flash

ality – Und

sed of a rececutting operuence of eve

S GOM DivinCommitt

10‐03 h 07‐01

erwater Ex

ent fatality, rations as paents are sum


32

xplosion

involving anart of a well mmarized in t

ork Group roup

n experiencestub removthe diagram

ed diver, whival project. Tms below.

Revis

ich occurredThe site

sion 0

d

Excerpt f

The com

Scuo

G‘r

T

Aw

T

Tsu

The com

Itin

Ithto

Ith

Ita

Itreb

Athosi

from IMCA S

pany’s subse

ite conditioustomer’s df grout betw

Generic procroutine’ well

he job safety

A ‘can do/wilwhich may ha

he project m

he on‐site uperintende

pany has no

t has instigatnformation f

t has reiteraazardous. Ito be prepare

t has notedandover pro

t has pointednalyses (JSA

t is aiming einforcemenring about a

Again in relathe companynshore manignificant ch

US

Safety Flash

equent inves

ons had prorawing, in teween annuli;

edures had l stub remov

y analysis (JS

l do’ attitudave caused s

manager only

procedureent, supervis

oted the follo

ted a ‘formafrom custom

ated that sat has noted ed, as per its

d the need ocedures and

d out the neAs) to identify

for a bettent training, a ‘can do/wil

tion to a bey has noted nagement aanges to pro

S GOM DivinCommitt

10‐03 – Con

stigation has

oved to beerms of the w

been produval;

SA) had focu

e can be presome resista

y had limited

e, developesor and diver

owing action

al request fomers;

alvage and bthe need fos project ma

for projectd project ris

eed for formy all potenti

er implemenin accordanll do safely’

tter implemthat, when

and the cusocedures.


33

ntinued.

s noted the

e different wellhead co

uced for wh

used on exca

evalent amoance to halt o

d involveme

ed by a r, proved to

ns:

or informatio

burning jobsor detailed pnagement p

t managemk assessmen

mal project rial risks befo

ntation of itce with its culture emb

mentation of ever appropstomer are

ork Group roup

following fin

from thoseonnector ass

hat had been

avation as th

ong dive teamoperations;

ent in this op

widely expbe not adeq

on’ procedu

s are never procedures aprocedures;

ent procednts;

isk assessmeore commenc

ts ‘safety stmanageme

braced by all

its managepriate, projeto be invo

ndings:

e representembly, bubb

n considered

he primary r

ms and in th

peration;

perienced tquate to avo

ure for retrie

routine andand project

ures to inc

ents and wocement of o

tand‐down’ nt‐of‐change employees;

ment‐of‐chaect managerolved in and

Revis

ted in the bling gas and

d a ‘standar

isk;

e wider indu

team of doid the fatalit

eval of addit

d are potenrisk assessm

clude forma

ork site job soperations;

system thre procedure;

ange procedrs, senior and to approv

sion 0

end‐d lack

rd’ or

ustry,

diving ty.

tional

ntially ments

al job

safety

rough es, to

dures, nd/or ve all

Excerpt f

7 U

We haveoccurring

1. AtotoathtoTfoinh

2. SahooftokeWhan

3. Dloudostea

4. Ththwcohsewwea

5.

from IMCA S

Underwater Ex

e received reg when oxy‐

A diver was mo mark the ao tap a nummount of oxhe gas pockeogether withhe diver waor a short pento the decoad some che

alvage diversad to be burnil and air pocf oil the diverook place. Thept talking toWhen the injuospital. Both nd chest pain

uring cuttingongitudinal dip under the tiver had repoccurred. The tand by diveardrums.

he fourth inche tank for a wanted to cutonnect a thinand inside theconds of stawas able to cowas transferreardrums.

US

Safety Flash

xplosions

eports from arc cutting t

making cornarea that hamber of timexygen must et reached ith hydrogen,s hit by the eriod. The stompression cest pain but

were cuttingned from theckets were rer started to che standby dio the injuredured diver waof the diver’

n. The diver co

g work in a direction, a divtank top. Wheorted some sudiver was ab

er. After the

cident occurrecouple of hot a small hol rope to keepe hole to chearting cuttingome to the sed to a nearby

S GOM DivinCommitt

05‐04

members otechniques h

er holes in td to be cut oes with the have been ets lowest ex reached thpressure watandby diverchamber andwas able to

g an access hinside to themoved by a put a hole in tver immediat diver. The inas on deck th’s eardrums hould not resu

double bottomver tried to cen the cuttinuction into thble to come tdecompress

ed during theours using an e in the tanp the air hoseeck for a gas‐g, he saw a fiurface withoy rig for med


34

of four separhave been in

the ships shout. The rodrod on the escaped fromxplosion levee gas pockeave of the exr guided thed was then tresume wo

hole into a tae outside. Befpump. After che tank. Withtely started tnjured diver he paramedichad been perme his work

m on a salvaut a small hog rod had inite hole. Whileto the surfaceion, the dive

e cutting of tair hose befok wall, just be in place. Bef‐pocket and ere inside theut any problical treatmen

ork Group roup

rate incidenn use:

hell plate usid did not igncutting spom the rod ael value. Whet, which waxplosion and victim out otaken to therking after t

nk for lifting fore starting wchecking thathin approximto retrieve thmanaged to c examined hrforated and for 37 days.

age job whileole in the tantially gone the he drew thee without aner medic dia

ank wall platore and durinbeside a holefore resumingeverything see tank and anem or assistant. The medic

nts of underw

ing ultrathernite and the ot. Every timnd eventualhen the rod ias followed d became diof the wrecke hospital forthree days.

slings to be with the cuttt there were ately five seche umbilical aclimb the dihim and he whe had a sor

e cutting the k to avoid gahrough the tae cutting‐rod ny problem oagnosed a pe

ting. The inteng the actuale made by hg cutting, theemed to be on explosion foance of the sc diagnosed p

Revis

water explo

rmic cuttingdiver was fo

me he tappelly the mixtuignited, the by an explozzy/ unconsk. The diver r observatio

installed. Theting, the remano visible resconds an expland the supeive ladder himwas then takre throat and

bottom platas pockets bunk top platinback, an explr assistance oerforation of

ention was to cutting. Theis predecesse diver felt wiokay. Within ollowed. The stand by diveperforation of

sion 0

osions

g rods orced d, an ure in heat, osion. scious went n. He

e hole aining sidues losion ervisor mself. ken to d nose

ing in uilding g, the losion of the both

o flush diver or, to ith his a few diver

er and f both

Excerpt fr

Oxy‐arc cthe procmixture followingthose inv

Gbsu

BtocuthDp

Exgaoso

Actions isuper‐liteenclosedParticula

It is recooperatioresidual managemIMCA D flushing v

The use potentiasupervisoand the i

rom IMCA Saf

cutting invoess. When tis formed, wg factors knovolved with t

Gas pockets ubbles of gaufficient qua

low backs –o be generautting technhe time betDuring the rroduce suffi

xplosive or ases or fumf blow back.ome light all

instigated be for use dd spaces prior recommen

ommended ns commentraces of hyment measu003 (Oxy‐Avoid spaces

of Arc Air lly hazardouors and divindentification

US

fety Flash 05

lves the usethe proportiwhich will iown to causthese incide

– gas pockas are trappantity;

– blow backsted at the cnique at deptween makiresearch an cient hydrog

flammable es can be re. For instancloy materials

y those invduring operaor to commendations aris

that detailece, specificaydrocarbonsres such as dArc Cutting with inert ga

Rods couldus operationng personnen and manag

S GOM DivinCommitt

‐04‐ Continue

e of large quon of hydrognite when se an explosnts:

kets are forped on their

s are spontautting pointpth. It showeng the rod interval of

gen to cause

substanceseleased durce: hydrocars.

olved includations of thncing hot wsing from the

d risk assesally when ths (such as indiver awareOperations asses such a

d also be cos such as thoel are compegement of h


35

ed.

uantities of ogen to oxygthe arc, or

sion during

rmed when r way to the

neous explot. A researched that ther‘hot’ and sf four secone a serious e

– dependiing cutting wbons inside

de specifyinghis type andork. ese incident

ssments are here may ben double boness, for exaUnderwate

as nitrogen.

onsidered iose describeetent in termhazards assoc

ork Group roup

oxygen andgen reaches r a spark, reoxy‐arc cutt

the shape e surface an

osions of vah project ware is enoughstriking the nds was shoexplosion, ev

ng on the which can ca pipe, pain

g the use od cold‐cuttin

ts have inclu

carried oute a potentiaottom tanksample diversr), use of c

n some cased in the texms of the skiciated with t

d generates a certain leeaches it. Rting have be

of a structnd allowed t

rying intensas carried ouh hydrogen parc, to cauown to be ven in half‐u

substance iontribute tont or bitumas

of hard helmng‐drilling o

ded the follo

t before undal of gas ents/fuel tanks s should be fcold cutting

ses. Whenext, it is impells required the operatio

Revis

hydrogen devel, an explReminders oeen identifie

ure is suchto accumula

ity which aput on the oxproduced, dse an explolong enougsed rod;

nvolved, vao the mechastic coatings

mets such aof holes to

owing.

derwater cutrapment anof vessels).familiar with techniques

ver carryingrative that dby the operon.

sion 0

uring osive of the ed by

that ate in

ppear xy‐arc uring osion. gh to

arious anism s, and

s the flush

utting nd/or . Risk h s and

g out diving ration

Appendix

Oxygen athe torch100 foot

Exotherm

Tham

Note: Thhose/cabl

x 6 : Amper

Exothe

and Amperah. Exothermof host for

mic rods req

LengthC

Feet

150

200

250

300

350

400

450

500

he increase imperes per fi

ese pressurele lengths, dia

US

rage and O2

rmic Ro

age setting fmic Rods reqhose loss

quire 150 AM

h of PowerCable

n amperage ifty feet to se

es and amperameter and c

S GOM DivinCommitt

2 Matrix

ods Am

for exothermquire 90 PSI

MPS at the ro

A

#

1

1

1

1

1

1

1

1

compensatesettings.

rage settings onditions.


36

perage

mic rods. AI at the torc

od

Amperage

1/O

155

157

159

161

163

165

167

169

s for resistan

may differ f

ork Group roup

& Oxyg

All Oxygen sch. You mu

settings fo

#2/O

152

154

156

158

160

162

164

166

nce losses. F

rom actual s

gen Set

settings shouust add 5 to

or Cable Si

#3

15

15

15

15

15

16

16

16

For greater le

ettings requi

Revis

ttings

uld be figur10 PSI for e

ize

3/O

50

52

54

56

58

60

62

64

ead lengths,

ired dependi

sion 0

ed at every

add 2

ng on

Oxygen abe figure

It will tak

6

Note: Thehose/cabl

Tubu

and Amperaed at the tor

ke 300 amps

650 AMP W

ThickneMet

5/8", 1

3/4

1"

1‐1/

1‐1/

1‐3/

1‐7/

2"

ese pressures le lengths, dia

US

lar Steel

age settings rch. You mu

s at the torc

Welding M

ess of tal

1/2"

4"

4"

2"

4"

8"

and amperagameter and c

S GOM DivinCommitt

Rods Am

for tubular ust add 5 to

ch head to co

Machine at

OxygenBo

1

1

1

1

ge settings monditions.


37

mperage a

steel rods, f10 PSI for ev

onsume a tu

1800 RPM

n settings oottom PSI

70‐80

90‐100

90‐100

100‐125

125‐150

150‐170

150‐170

170

ay differ from

ork Group roup

and Oxyg

flux coated.very 100 fee

ubular steel

M for Settin

over

m actual setti

gen Settin

. All Oxygenet of hose, fo

rod

ngs of 350

Ampera

350‐39

370‐38

380‐39

425‐45

460‐48

490‐51

510‐52

525‐55

ngs required

Revis

ngs

n settings shor hose loss

to 575:

age

90

80

90

50

80

10

25

50

depending o

sion 0

hould s.

on

Appendix

1. Ccl

2. Sete

3. Se

4. Rstw

5. Op

6. Kthbd

7. Rre

8. If

9. R

x 7 : BR22 C

onnect the lean non‐com

et the regulesting purpo

eal off head

eplace the ctub of full cuwithout a rod

Once the heaull the torch

eep the levehere are bube small buisregard the

emove the temove the n

f torch has le

emove the s

US

Cutting Torc

torch to itsmbustible ga

lator pressuosed only)

of the torch

collet washeutting rod ind in place as

ad is sealed,h lever to ins

er depressebbles cominbbles initiaese initial bu

torch from tnut slowly.

eaks repair a

solid washer

S GOM DivinCommitt

h‐Leak Test

s Oxygen Suas will also w

re to 130 P

h

er with a wn the torch ait will bend

, place the tsure the enti

d underwatg from the tlly as the wbbles.)

the water an

as required a

r and replace


38

Procedure

upply, (contwork)

SI. (normal

elding colletand tighten the tabs of t

torch in a buire torch is p

er for at leatorch it shouwater displ

nd point plu

and retest.

ed with norm

ork Group roup

taminant fre

operating p

t washer (sonormally (dothe collet.)

ucket of watpressurized

ast 30 seconuld be repaiaced any e

ug away from

mal collet wa

ee compres

pressure is 9

olid rubber o not attem

ter, pressuri

nds and looired prior toentrapped a

m personnel

asher.

Revis

ssed air or o

90 PSI, 130

disk). Put ampt to tighte

ize the torch

k for bubbleo use. (Therair in the t

l or property

sion 0

other

is for

a rod n nut

h and

es. If e will torch,

y and

GOM D iving S afety W ork G roup - usgomdswg.comusgomdswg.com/PDF/US GOM DSWG Underwater Burning...

Documents

Transcript of GOM D iving S afety W ork G roup - usgomdswg.comusgomdswg.com/PDF/US GOM DSWG Underwater Burning...