Tiêu chuẩn iso 20421 2 2017

© ISO 2017 Cryogenic vessels — Large transportable vacuum insulated vessels — Part 2 Operational requirements Récipients cryogéniques — Grands récipients transportables, isolés, sous vide — Partie 2 E[.]

Cryog enic vessels — Lar g e

Part 2:

Récipient cry g nique s — G ra ds récipient tra sporta le s, isolé

COPYRIGHT PROTECTED DOCUMENT

© ISO 2017, P blshed in Sw itz rlan

A ll rig hts r eserved Unles otherw ise spe ified, nopar of this p blc tion ma y be r epr od c d or utilz d otherw ise in an form

or b an me ns, ele tr onic or me hanic l, inclu in p oto opying , or postin on the internet or an intranet , w ithout prior

written permis ion Permis ion c n be req esed from either ISO at the ad r es below or ISO’s member bod y in the c u try of

F reword i v

Introduction v

1 Sc ope 1

2 Nor mati ve r eferenc es 1

3 Terms an definitions 1

4 Prelminar ies befor e put ing into ser vic e 2

4.1 General 2

4.2 Mar king an la el ng 2

4.2.1 Mar king 2

4.2.2 L bel ng (or placar ding ) 3

4.3 Han o e document 3

5 Per o nel training 3

6 General safety requirements 4

6.1 General 4

6.2 Safety considerations 4

7 Put in into ser vic e 5

8 L catio 5

9 Transpor t 6

10 Fi lng 6

1 1 General 6

1 2 Pr efi che ks 7

1 3 Pr eparations 7

1 4 A fte -fi che k 8

11 Product w ithdrawal 8

12 Chang e of ser vic e 8

13 Taking o t servic e 9

14 Maintenanc e and repair 9

15 Perio ic inspectio 10

16 Additio al r equirements for flammable gases 11

1 1 General safety r eq ir ements 1

1 1.1 General 1

1 1.2 Ele trical eq ipment 1

1 1.3 Grou ding (earthing )sys em 1

1 2 Puting into se vic ( e also Clause 7) 1

1 3 L cation ( e also Clause 8) 1

1 4 Transport se also Clause 9) 1

1 5 Fi ing ( e also Clause 1 ) 1

1 6 Chang e of se vic ( e also Clause 1 ) 1

1 7 Taking out of se vic ( e also Clause 1 ) 1

1 8 Maintenanc an r ep ir ( e also Clause 14) 1

1 9 Emer g ency eq ipment an pr oc d r es 1

Biblog raphy 14

ISO (he Int ernational Org nization for Stan ardization) is a worldwidefede ation of national s an ards

b dies (ISO membe b dies) The work of pr p ring Int ernational Stan ards is normaly car ied out

through ISO t ech ical committ ees Each membe b dy int er st ed in a subje t for w hich a t ech ical

committ ee has be n es a lshed has the right t o be r pr sent ed on that committ ee Int ernational

org nizations, g ove nmental an non-g ove nmental, in laison with ISO, also take part in the work

ISO cola orat es closely with the Int ernational Ele trot ech ical C mmis ion (IEC) on al matt ers of

ele trot ech ical s an ardization

The proc d r s used t o develo this document an those int en ed for it furthe maint enanc ar

desc ibed in the ISO/IEC Dir ctives, Part 1 In p rticular the dife ent a pro al c it eria ne ded for the

dife ent ty es of ISO document should be not ed This document was draft ed in ac ordanc with the

edit orial rules of the ISO/IEC Dir ctives, Part 2 ( e www iso org dir ctives)

A tt ention is drawn t o the p s ibi ity that some of the element of this document ma be the subje t of

p t ent right ISO shal not be held r sponsible for identifying any or al such p t ent right Detais of

any p t ent right identified d ring the develo ment of the document wi be in the Introd ction an / r

on the ISO ls of p t ent de larations r c ived ( e www iso org p t ent )

Any trade name used in this document is information given for the convenienc of use s an does not

cons itut e an en orsement

For an ex lanation on the meaning of ISO spe ific terms an ex r s ions r lat ed to conformity as es ment,

as wel as information a out ISO’s adhe enc to the Wor ld Trade Org nization (WTO) principles in the

Te h ical Bar ie s to Trade (TBT) se the folowing URL: www iso org iso/ for word html

The committ ee r sp nsible for thisdocument is ISO/TC2 0, Cr yo enic ves s el s

This se on edition canc ls an r plac s the f irs edition (ISO 2 42 - 2:2 0 ), w hich has be n

t ech icaly r vised

A l s of al p rt in theISO 2 42 se ies can be fou d on the ISO websit e

Element of this document sup ort the r q ir ment of the UN-R ecommen ations on the Transp rt of

Dang erous Go ds an othe int ernational, national or local r q ir ment

L rg e transp rta le c y g enic ves els ar oft en p rtly eq ip ed b the man factur r, but ma be

complet ed or r -eq ip ed b anothe p rty, such as the o e at or or owne F or this r ason, some of

the sco e of this document, w hich inclu es put ing int o se vic , inspe tion, f il ing, maint enanc an

eme g ency proc d r s, overla s with ISO 2 42 -1

This document a ples t o ves els for c y g enic fluids, primariy as spe ified in ISO 2 42 -1 It ma also

be used for ves els for c y g enic fluids man factur d an designed t o othe s an ards, e.g EN1 5 0- 2

In case of conflct betwe n the r q ir ment of this document with a plca le r gulations, r gulations

take pr c denc

Cryog enic vessels — Lar g e transportable vacuum- nsulated

These o e ational r q ir ment inclu e put ing int o se vic , f il ng, with rawal, transport within the

location, st orag e, maint enanc , pe iodic inspe tion an eme g ency proc d r s

F or the transp rt of these ves els b publc ro d, rai , wat erwa , sea an air, ad itional r q ir ment

can a ply;these ar defined in spe if ic r gulations

2 Normati ve r eferences

The folowing document ar r fe r d t o in the t ext in such a wa that some or al of their cont ent

cons itut es r q ir ment of this document F or dat ed r fe enc s, only the edition cit ed a ples F or

un at ed r fe enc s, the lat es edition of the r fe enc d document ( inclu ing any amen ment ) a ples

ISO 2 42 -1, Cr yo enic ves s el s — L rge tra s porta le v c uum-ns ulated ves s els — Part 1: Des ig ,

f bric atio , ins pec tio a d tes tin

3 Terms and definitions

F or the purposes of this document, the folowing t ermsand definitions a ply

ISO an IEC maintain t erminolo ical data ases for use in s an ardization at the folowing ad r s es:

— IECEle tro edia: a aia le at ht p:/ www ele tro edia org

— ISO Onlne brow sing plat orm:a ai a le at ht p:/ www iso org o p

3.1

put ing into service

o e ation b w hich a new ves el being used for the firs time or an exis ing ves el being r turned t o

se vic is pr p r d for use

Note 1 to entry: Initial inspections an t ests are covered in ISO 2 42 -1 or similar design stan ards, e.g

EN 1 5 0-2

3.2

fi l ng

o e ation b w hich a transporta le ves el un e g oes a pr f il che k, f il ng with a c y g enic fluid an

an aft er-f il che k

3.3

with rawal

o e ation b w hich the prod ct istaken from a ves el conne t ed t o the sup ly sy st em

larg e transportable c y g enic ves el

the maly insulat ed ves el of mor than 45 l int en ed for the transp rt of oneor mor c y g enic fluids,

consis ing of an in e ves el, an out er jacket, al of the v lves an se vic eq ipment t og ethe with the

s ructural p rt

Not e 1 to entry: T e larg transporta le c yog nic ves elcomprises a complet e as embly that is re d for service

Not e 2t o entry: A “larg transporta le c yog nic ves el” is hereinaf er refer ed to as “ves el”

time that wi ela se from the es a lshment of the initial f il ing con ition unti the pr s ur has risen

d e t o heat influx t o the lowes set pr s ur of thepr s ur lmiting devic ()

4 Prel minaries before put ing into ser vice

Befor put ing int o se vic , ve ification shal take plac t o ensur that the ves el is suita le for the

int en ed se vic and that the marking, la el ng an han o e document ar complet e

4.2 Mar king and label ing

4.2.1 Mar king

Marking shal be in ac ordanc with the a pl ca le design s an ard an / r r gulations, e.g ISO 2 42 -1

4.2.2 Labeling (or placarding )

F or la el ng, the folowing shal be affix ed:

a) a flow she t denoting o e ation;

b) dang er la elsand marks in ac ordanc with transp rt r gulations;

c) risk an safety phrases as ociat ed with the g s cont en

d) name of the owne ;

e) name of the o e at or;

f) actual holding time for g ses being transp rt ed;

g) ma imum pe mis ible gros mas ;

h) unladen (ar ) mas ;

i) an u short ened identif ication of the fluid w hich is transp rt ed in ac ordanc with the transport an

subs anc r gulations an it net mas in ac ordanc with the documentation As an alt ernative,

this information can be inclu ed in a transport document

NOTE 1 Items a) t o i can ap e r on the ves el, name plate or transport document depen ing on the

req irements of the particular transport mode or operat or req irements

NOTE 2 Items e)t o i can b req ired by the design stan ards an do not ne d to b repe t ed

Spe ific transport r gulations shal alway s be consult ed prior t o the car iag e The holding time shal be

calculat ed for each journey in ac ordanc with a plca le transp rt r gulations

In ad ition t o the man factur r’ s documentation, w he e ne es ary, the c y g enic ves el shal be

ac omp nied b ves el-spe if ic document an ins ructions for al it ems sup led co e ing the

— o e ation,

— auxi iary eq ipment, and

— inspe tion r cords

These document shal be r tained b the owne of the ves el

The o e at or shal ha e a pro riat e ins ructions a aia le Such ins ructions ma be at ached t o the

ves el in a pe manent man e , or car ied b or a aia le t o the o e at or

5 P ersonnel training

Only pe sons trained for the spe ific task shal be alowed t o put int o se vic , fil , han le, o e at e or

maintain the ves el and it eq ipment

The training pro ramme shal inclu e

— normal proc d r s,

— prod ct an hazard identif ication,

— safe o e ating lmit ,

— eme g ency proc d r s,

— phy sical an chemical pro e ties of the ves el’ s cont ent an their efe t on the h man b dy,

— pe sonal prot ection, an

— confined sp c sentry, if a plca le

Training shal be r peat ed as ne es ary t o ensur that pe son el r main compet ent A r cord should be

maintained w hich detai s the training pe son el have r c ived

6 General safety requir ements

Befor any o e ation, the o e at or shal ensur that al eq ipment is fr e from any o vious damag e or

defe t w hich could afe t it safe o e ation

Marking an la el ng shal not be r mo ed or defac d

Conside ation shal be given t o the prod ct pro e ties an the use of a pro riat e pe sonal prot ective

eq ipment

Part un e pr s ur shal be discon e t ed only if they ha e be n pr viously depr s uriz d

Leaking v lves or con e tions shal be depr s uriz d befor r ctif ication When this is not p s ible,

leaking v lves u de pr s ur shal be tight ened using suita le t ools an proc d r s

Dir ct lame or dir ct int ense heat shal neve be used t o raise the pr s ur or de-ic froz n comp nent

Al surfac s w hich ma come in contact with the prod ct shal be clean for the int en ed se vic F or

cleanl nes r q ir ment , se ISO 2 2 8

Outlet , seals an trans e hoses shal be che ked t o be clean, dry an fr e from contaminant an

visible defe t befor conne tion

Ves els an trans e hoses shal not be modified without pro e authorization It is r commen ed that

the coupl ngsbe at ached t o the ves els an / r hoses in a man e that pr vent u authoriz d r mo al

of the prod ct coupl ngs

Ope ating v lves should be o ened an closed slow ly

6.2 S fety c onsiderations

In al o e ations and training, the fol owing safety conside ations shal be taken int o ac ou t

— Smal amou t of c y g enic fluids wi l prod c larg e v lumes of v p riz d g s Spi lag eof o y g en can

r sult in an o yg en-enriched atmosphe e;spi lag e of othe c yog enic fluids can r sult in an o y g

en-def icient atmosphe e Ap ro riat e measur s shal be taken for al these cases, e.g ventiation

— Be ause of the p s ibi ty of cold embrit lement, c yog enic fluids shal only be used in prod ct

sy st ems with comp nent w hich ar suita le for low t empe atur s

— Va orizing c y g enic fluids prod c g ses that ar hea ie than air an can ac umulat e in lowe

ar as (e.g pit , tr nches)

— Be ause of their extr mely low t empe atur s, c y g enic fluids wi prod c cold burns w hen

coming int o contact with the skin Cold burns can also be prod c d from contact with u insulat ed

eq ipment an piping

— Oxy g en enrichment d e t o lq efaction of ambient air can oc ur on the cold surfac s of u insulat ed

eq ipment w hich contains a fluid with a b i ing p int lowe than that of o yg en

— Conside ation should be given t o es a l shing pro e safety dis anc s d ring p rking or prod ct

trans e

7 Put ing into servic e

This o e ation shal fol ow a writt en proc d r an the r sult of the st eps inv lved should be r corded

(e.g in a che k l s ) Such ls s should be r tained b the o e ating comp ny

Ves els an ac es ories shal be visualy che ked for damag e

The folowing shal be ve ified

— The ves el an ac es ories ar a pro riat e for the int en ed se vic , comply with the flow she t an

ar a pro riat ely marked an la eled; al la els shal be clearly displayed an a pro riat e for the

prod ct

— A r lef devic with a set pr s ur not highe than the ma imum alowa le working pr s ur of

the ves el is f itt ed Pr s ur , siz and ins alation shal comply with the documentation Devic s

r q iring a pro al shal be cor e tly s amped an mat ching c rtif icat es shal be a aia le

— Al v lves ar o e a le

— Al r q ir d che ks an t es s ha e be n car ied out

Ensur that the ves el an ac es ories ar clean an compatible for the int en ed se vic ; se ISO 2 2 8

an ISO 2 0 0

The ves el should be purg ed with an a pro riat e g s u ti the g s eme ging from the ves el is

sufficiently dry an pur for the int en ed se vic

The ves el shal be co led down ac ording t o the man factur r’ s r commen ations St eps shal be

taken t o a oid u controled pr s ur rise d e t o ra id lq id v p rization The co l-down g s chosen

shal take int o ac ount the risk of soldification

Measuring an control ng devic s (level g ug e, pr s ur g ug e, et c ) shal be che ked for cor e t

o e ation an set ing

The r q ir ment lst ed in this clause ar v l d for st orag e an p rking, as wel as for othe activities

such as f il ing an with rawal

— Ves els shal be locat ed in a suita le ar a such as in the o en air or in a suff iciently ventiat ed

enclosed ar a, awa from sour es of heat (welding sour e, o en fir , et c ) Hot work shal be subje t

t o a pro riat e safety measur s The ar a shal be kept a pro riat ely clean and suita le ac es shal

be pro ided

— Adeq at e ventiation shal be pro ided In locations at or a o e groun level, natural ventiation is

g ene aly suff icient, pro ided that the ro m is larg e enough or that the out do r ar a is not closely

sur ou ded b wals In othe cir ums anc s, for ed ventiation or othe pr ca utions shal be

pro ided

— Ves els should not be locat ed u de grou d Howeve , w he e this is u a oida le, r lef devic

outlet (s) should be piped t o a safe ext ernal venting p int As an alt ernative, a pro riat e marking

(e.g in icating the risk of asphy iation) an suff icient contin ous ventiation t o deal with prod ct

r leases should be pro ided The vent pipework shal be designed in such a wa as t o ensur

pro e pr s ur r lef from the ves el an t o pr vent the ac umulation or blockag e of rainwat er b

airbornemat erial The same measur s shal be taken if ves els ar in o rs for ext en ed pe iods ( i.e

o e night or weeken s)