International Standard (!@ 3304 0 Q 4 4!l! l INTERNATIONAL ORGANIZATION FOR STANDARDIZATlON*ME~YHAPOflHAR OPTAHMBALWIR fl0 CTAH~APTH3Al&lWORGANlSATlON INTERNATIONALE DE NORMALISATION Plain end seamles[.]
Trang 1INT ERA T IO AL O GA NIZAT IO FO ST ANDARDIZ ATlO*MEYAPOf lHAR OPT AHMBAL R fl0 CT AH~A PTH3Al WORANlSATlO INT ERA T IO A L E DE N R ALISA TIO
Tub es d pr kcisio e a c ie sa s so d r e, rl ex t r& mit & ls es - Co ditio s t ec hniq es d lv r a iso
i
8
?
De c ript o : pip s (u e ), metal tu e , st eel tu e, s a mle s tu e, s ec if ica t io s, dime sio s, te ts, d sig a tio , c emical cmp sitio ,
mehanica l prop rt ie , d lvery cn it io s, a c c ept a nc e tetin
Trang 2IS0 (h Inter nat io al O a niza t io for St an a r diza t io ) is a w or l w id fe er at io of
na t io al st an a r ds b dies (IS0 memb r b dies) The w or k of prep a rin Int e at io al
Sta nd r ds is n rmaly c ar r ie o t t hr ou h IS0 t ec nic al c m it t es Ea c h memb r
b od int erest ed in a su jec t for w hic a t ec nica l c om itt ee ha s b ee est a blsh d ha s
t he r i ht to b e represe t ed o t hat c m it t ee Int er na tio a l orga niza t io s, g v er n-
me t a l a d n n-g v er nme t al in la iso w ith ISO, a lso t a ke pa rt in t he w or k
Draf Int e a tio al Sta nd r ds a do t ed b y t he t ec hnica l c mmit t ees a re c ir culat ed to
t he memb er b dies for ap p roval b f or e th ir a c c ept a nc e a s Int e atio al St a nd r ds b y
t he IS0 Co n i The a re a p p roved in a c cor da nc e w ith IS0 pr oc ed r es req ir i g a t
lea st 7 % ap p roval by t he memb r b dies v ot in
Inter nat io al St a nd r d IS0 3 0 wa s p re a re b y T ec hnic a l Commit t ee ISO/T C 5,
Fer r ous met a l p ip es a nd met a llc fitin s
T his se o d e it io c a nc els a nd re la c es t he first e it io (IS0 3 0 -19 51, of w hic it
c onstitutes a t ec hnica l r ev isio
User s sh uld n t e t ha t a ll Int er nat io al St an ards u d r go r ev isio from t ime to t ime
a nd t hat a ny r ef eren e ma de h r ein to any ot her Int e a tio al St an a r d imples its
la t est e it io , u les ot her w ise st a t ed
0 int e a t io a l O aniza t io for Sta ndardizat io , 19 5 0
Trang 3Pla in end sea mless prec ision st eel t ubes - T ec hnic a l
1
Sc pe and f ield of a p plc at io
T his Inter nat io al St a nd r d sp cif ies t he t ec hnica l c n itio s
for d lvery of sea mles t ub s w ith p l n e ds, ma ufa tur ed
from t he gra des of st eel sh w n in t a b le 2, w ith precisio di-
me sio al t olera nc es a nd in t hose dime sio s sh w n in t a b le 9
w hic have b ee selec t ed from IS0 4 0
Tub es in a c corda nc w ith this Int er nat io al St a nd r d a re use
ma inly for p r poses w here imp r t a nc e a t t a c hes to dime sio a l
a c c ura c y a d, if req ir ed, sma ll t hicn s es a nd sur fa e finish
If su h t ub s a re int en e for use in h dr aulc p i n e uip -
me t , t he sha ll b e use o ly in t he a nn a le or n r malze
d lvery c n itio
IS0 4 4, St eel a d st eelpr od ct s - Ge era l t ec nica l d lv ery
re uir eme t s
IS0 2 0 12, St eelpr od c t s f or pr es ur e p rposes - Qua lit y r e-
q ir eme t s - Pa rt 2: W ro g t sea mles t ub s
IS0 3 4 , St eel t ub s a nd t ub la r sha pe a c c es o es w ith
c ir cular cr os -se tio - Sy mb ls to b e use in sp cific t io s
IS0 4 0 , Pla in e d st eel t ub s, w eld d a d sea mles -
Ge era l t a b les of dime sio s a d ma sses p er u it le gt h
IS0 6 9 , Met alc ma t eria ls - T ensie t es n
IS0 3 3 , Met a llc ma t er i ls - Tub s - Fla t t enin test 1)
IS0 8 9 , Met a llc ma t eria ls - Tub es - DrLf ex p a ndin test 2)
D = Out sid dia met er of t he t ub e
T = T hic kn s of t he t ub e w a ll
Rnl
= Tensie str en t h in n w to s p er sq a re mi met r e
R
eH
= Up p er y ield st r en t h in n w t ons p er sq a re mi -
met r e
Elo ga t io afer fr actur e, a s a p erc ent a ge, of
o gin l gaug le gt h (L,), L, = 5,6 fl
Cr os -se t io al are of t he gaug le gt h
Cold-inish d a s-dr a w n
L ig t ly c ld-w or ke
Ann a le in c ntr ole a t mosp ere a nd d sc a le
Norma lize in c ntr ole a t mosp er e
Norma lize in c ntr ole a t mosp er e a d d sc a le
4.1 Ma nda t ory inf orma t ion
The p r c ha ser sh l st a t e t he folow in d t a ils in his e q ir y
a d or de
a ) q a t it y ;
b) r ef eren e to this Int e a tio a l St an a r d;
c) gra de of st eel;
d) r eq ir ed c n itio of t ub es a t d lv en/
e) o tsid dia met er a nd t hic n s ;
4.2 Opt iona l c on it ion
Cer t ain a lt erna t iv es a re p rmit t ed; ot her su pleme t a ry r e-
q ireme t s ma y b e sp cif ie a nd t he p r c ha ser sha ll st a t e his
req ir eme t s in his e q iry a nd or de if h d es n t d so,
sup p ly w il b e ma de a t t he o t io of t he ma ufa t ur er
4.3 Desig a t ion
The t ub s sha ll b e d sig a t ed in t he folow in se u nc e by
-
t he na me of t he pr od ct
-
r ef eren e to this Int er na tio al St a nda r d;
-
t he gra de of st eel t he c n itio of t ub s a t d lv ery ;
-
t he o tsid dia met er a nd t he t hic n s
1) A t prese t a t t he st a ge of dr af (Revisio o f ISO/R 2 2-19 1 whic h remain in force u ti p blc atio o f IS0 8 9 )
2) A t pres nt at t he st age o f dra f t (Revisio o f ISO/R 16 -19 0 whic h remain in force u ti p blc atio o f IS0 9 9 )
Trang 4Ex amp le :
Sea mles pr ecisio st eel t ub s, in a cc or da c e w ith IS0 3 0 ,
in st eel R3 , a nn a le in a c ntr ole a t mosp ere (GBK ),
of
o t sid dia met er 2 m , t hicn s 2 mm, in r an om le gt hs,
sha ll b e d sig a t ed a s
The t ub s sh l b e ma ufa tur ed from a st eel pr od c ed b y a n
op en or elec t r ic h ar t h, or o e of t he ba sic ox yge st eel-ma kin
proc s es,
The st eel use sha ll b e kie The met ho of ma uf act ur e is lef
to t he o tio of t he ma uf actur er
A t t he p r c ha se s req es t he su pler sha ll in ic at e t he st eel-
ma kin pr oc s a nd t he d ox ida t io pr oc d r e use
The t ub s sha ll b e ma ufa tur ed b y a sea mles pr oc s The
a re n r maly c ld-inish d o b t h t he insid a d t he o tsid
sur fa es For c er t a in a plc a t io s, t he t ub s ma y b e h a
t r ea t ed The c n itio of t he t ub s a t d lv ery sha ll b e c ose
from t a b le 1
The t ub s a re n r ma lly d lv ere in o e of t he c n itio s
sh w n in t a b le 1
6.1.1 L a dle a na ly sis
On la dle a na ly sis, t he st eel sh l sh w t he c mp sit io given in
t a b le 2, a pp ropria t e to t he st eel t yp e sp cif ie
Tab le 1 - Delvery c n itio
(lg t ly c old-
f orme w it hin c ert ain
lmits (b n in , ex p a nd-
th u p r t ra nsf orma tio p int an c oole
Both st a ge o f h a t treatme t are c a rrie o t
Tab le 2 - Ch mic a l c mp sitio o la dle a na ly sis
Trang 56.1.2 Pr od ct a na ly sis
If a c ec k a na ly sis is req ired o t ub s, t he p rmis ible d v i-
a tio s given in IS0 2 CW2 a p p ly
6.2.1 The mec ha nic a l prop rt ies d p n o t he d lvery c n-
ditio Th y a re sp c if ie in t a b les 3, 4, 5 a nd 6
For t ub s d lv ered in t he a nn a le c n itio , t he y ield str es
may b e t a ke a s 5 % of t he minimum t ensie st r en t h given in
t a b le 5 for t he p r p ose of c a lc ula t in t he t est pr es ur e
T a ble 3 - Mec ha nical prop rties in t he c old-f inis ed,
Gr a de
I3 8
R3
R3
R4
R5
4 o
8
Tab le 4 - Mec ha nic a l pr op rt ies in t he lg t ly
Gr a de
I3 8
R3
R3
R4
R5
5,6 fi
T a ble 5 - Mechanica l pr op r t ies in t he a nnea led
Gra de
R2
R3
R3
R4
R5O
R, min
A min o 5,6 fi
Tab le 6 - Mec ha nic a l prop rt ies in t he n r ma lize
Grade
R2
R3
R3
R4
R5
%
2
6.2.2 The t ub s sha ll me t t he a p p ropria t e req ir eme t s of
t he t est s given in c la use 9 (se t a b les 7 a d 8)
6.3 W elda bi t y
Tub es in t he a nn a le or n rma lize c n itio a re suit a ble for
weldin w ith ut sp c ia l pr ec aut io s For c ld-inish d t ub s
whic a re w eld d or b ra ze , t he mec ha nic al pr op rt ies in t he
h a aff ect ed zo e ma y b e aff ecte b y t he w eldin t emp ra -
t ur e
7.1.1 Diameter s a nd t hic knes
The dime sio s for o t sid a nd insid dia met er a nd t hicn s
a re given in t a b le 9
7.1.2 Ma sses
The ma sses p er u it le gt h a re given in IS0 4 0
7.1.3 L en t hs
Co c r nin le gt hs, a distin tio is dr aw n b et we n :
a ) r an om le gt hs b et wee 2 a nd 7 m : t hese a re su ple
if, w he or de n , n sp ec ia l a greeme t is rea c he c n er n-
in t ub e le gt h;
b) e x act le gt h
7.2.1 Dia met er
The p rmis ible v a ria t io s o o t sid a d insid dia met er ap p ly
to c ld-inish d/h r d a nd c ld-inish d/sof t ub s, a nd a re
given in t a b le 9 A s a r esult of distor tio d r i g a nn a lin , w ith
a nn a le a d n rma lize t ub s, t he v a r iat io s in dia met er a re
grea t er; t he p r mis ible va lu s a re a s folows :
T hic n s, T (m )
Toleranc e
t ab le 9
T ID < 1 2 a nd TID > ‘ 4 I5 t imes t he va lu s
given in t a b le 9
T ID < I/# a nd T ID > I6 t wic t he va lu s giv n
in t a b le 9
T ID < 1l6
2,5 t imes t he va lu s
giv n in t a b le 9
It is n t p s ible in a ll c a ses to ap p ly simult an o sly a ll t hree
p rmis ib le v a r ia t io s for o t sid dia met er , insid dia met er a d
t hic n s Tub es a re g n ra lly or der ed to o t sid dia met er a d
t hic n s
Trang 6If t he insid dia met er is mor e imp r t ant, t ub s may b e or der ed
to insid dia met er a d thic n s or o tsid dia met er a d insid
dia met er
Sp ec ia l t olera nc es may b e agre d u o b et wee t he int erest ed
p a r t ies
7.2.2 T hicn s
Tolera nc es o t hic n s a re given in t a b le 9
7.2.3 O v a lit y
The p rmis ible v a ria t io s in t he t ub o t sid dia met er in lu e
ov a lit y
7.2.4 L en t hs
Ex act le gt hs : t he folow in v aria t io s a re p r mis ible :
L n th
Toleranc e
+imm
+,Smm
+‘rnr n
b y a gre me t
If, in in iv id a l c a ses, le gt hs a re req ired w it h a grea t er
d gre of a c c ura c y , t he p rmis ib le v a r ia t io s sha ll b e a gre d
7.2.5 St r a ig t nes
The t ub s sh l b e st r aig t For dia met e grea t er t ha or e ua l
to 16 mm, t he total b n sh l n t e x cee d 0,2 % of t he ov era ll
le gt h of t he t ub The b n mea sured o any le gt h of 1 m
sh l n t e x cee d I5 mm
Sp ecia l t oler a nc s may b e a gre d b et wee t he ma uf actur er
a d t he p r ch se
7.2.6 En prepa ra t io
The t ub e e ds sha ll b e c t n mina lly sq a re to t he ax is of t he
t ub By a gre me t b et we n t he int er est ed pa rt ies, sp c ia l
e d-inishin ma y b e a pp lie
The t ub s sha ll have smo th ex t erna l a nd int er na l sur fa es, t he
fa tur e The t ub s sh l have a w or kma lk finish b t sma ll im-
p r fe t io s a re p r mis ible prov id d t hat t he thicn s r ema ins
w ithin t he low er t oler a nc e lmit
In t he c a se of t ub es w ith a n insid dia met er les t ha n 16 m ,
for ma ufa tu n r ea so s t he r eq ireme t rega rdin a smo th
int er nal sur fa e is n t fuly o serva b le
Cold-inish d t ub s a re p r mit t ed to ha ve a n a dh rent la y er of
p osp a t e a nd lu r i a t o gina t in from t he dr a w in pr oc es
o t he int e a l a nd ex t erna l sur f ac
Tub es a nn a le or n rma lize in a c ntr ole a t mosp er e ma y
have a disc lor atio , b t sha ll b e fr ee from lo se sc a le
8.2 Rec tif ic a t io
Sur f ac imp r f ectio s may b e dr es e prov id d t ha t t he
t hic n s afer dr es in r ema ins w ithin t he low er t oler a nc e
lmit Pe nin of sur f ac d fe t s is n t p rmis ible
Test s a re n rmaly a p p lie o ly a s a q a lit y c ntr ol b y t he
su ple If req ir ed for t ub s su ple a ga inst a pa r t ic la r
or de this sh l b e sp c if ic a lly st a t ed in t he or de
A cc r din to t he pr ov isio s of t he or de t he t ub s may b e su -
jec t ed to a fin l insp c tio p or to d lvery , folow in t he
in ic tio s giv n in 9.1 9.1.2 a d 9.2
Ac c ept a nc e t es n may b e ca r r ie o t b y a n a ge t a pp oint ed
by t he p r c ha se T his a ge t may b e a n o tsid insp ct or or
ma y b e selec t ed from t he staf of t he ma ufa tur er The d t a ils
of t he a c c ep t a nc e t es n sha ll b e a gree u o a t t he t ime of
or de n
9.1.4 Sum a r y of t est s
The t ub es sha ll b e su jec t ed to t he folow in t est s :
a ) v isua l insp ct io ;
b) t ensie t est ;
c) drif ex p andin t est ; or
d) f latt enin t es
Drif ex p a ndin test s sha ll b e ma de o ly in t he c a se of t ub s
ma de from R2 , 8 3, R3 a nd FM4 in a n a nn a le or n r malze
ca se of a ll oth r dime sio s a nd gra des of st eel t he f lat t enin
t est sh l b e ma de where a nn a le or n r malze t ub s a re
c on er ne
A lea kt ig t nes t est is n t n r ma lly prov id d for t hese t ub s If
t hese t ub s a re to b e use for c a rr y in fluids, a nd a re in t he
n rma lize or a nn a le c n itio , t he sha ll b e t est ed The
lea kt ig t nes t est sha ll b e sp cif ie o t he or de
Trang 79.1.2 Definitio of a lot sele t io a nd prepa ra t io of
t est p iec es
The t ub s su jec t ed to a c c ep t a nc e test s sh l b e t est ed in lots
A lot c mpri es 2 0 t ub s of t he sa me st eel gra de, d lvery c n-
ditio a nd dime sio
A ll fr actio s of a lot c mp sin les t ha n 2 0 t ub es sh l b e
c nsid r ed a s a c omplet e lot A ll fr actio s of a lot c mp s-
in les t ha 2 t ub s sha ll b e dist r ib t ed a mo g t he oth r
lots
The t ensie t est a d t he drif ex p andin or f la e in test s
sha ll b e ca r r ie o t o o e t ub e selec t ed a t r an om from ea c h
lot
A ll t ests sha ll b e ca r r ie o t a t a mbie t t emp r a t ure
9.2.1 T ensie t est
In this t es ca r r ie o t in ac c orda c e w it h IS0 6W2, t he t ensie
st r en th a nd p erc ent a ge elo g t io sha ll b e me sured a nd t he
va lu s o t a in d sh l c r r esp n to t hose in t a bles 3, 4 a nd 5
In t he n r ma lize c n itio , t he u p er y ield st r en th sha ll a lso
b e mea sur ed a d t he va lu s o t a in d sh l c r r esp n to th se
given in t a b le 6
9.2.2 Flat t enin t est
The flat t enin t est sh l b e c ar r ie o t in a cc or da c e w ith
IS0 8 9 The t est p iec e sh l sh w n it her cr a ck n r fis ur e
w he t he dist a nc e b et we n t he p la t ens is n t grea t er t ha t he
va lu s given in t ab le 7
9.2.3 Drif ex p a ndin t est
The drif ex p andin t est sha ll b e c r rie o t in a c corda nc w ith
IS0 8 9 The t est p iec e sh l sh w n it her cr a ck n r fis ur e
b f ore ex p a nsio rea c hes t he v a lu s giv n in t a b le 8
Tab le 7 - Flat t enin t est (in cir c umsta c es w here t he dia met er a nd thic n s a llow
d for matio of t he t est p iec e)
A fter t he t est ca r r ie o t a cc r din to IS0 9 9 , t he
dist an e H, in mi met r es, b et we n t he p la t ens sh l n t
b e grea t er t ha n t he valu giv n by t he formula :
H= (l+ )T
c + (T /D)
w here
Norma lize or a nn a le
R-2
I3 3
R3
R4
R5
.- , , , s-m ,-a-
T 1) is t he t hicn s , in mi metr es;
D 1) is t he o tsid dia met er , in mi met r es;
c is t he st eel c nst ant, va ry in w ith t he gra de :
0,0
0,0
0.0 ~
0,0
6 6
I
symo ls T r a m ib x i4
Tab le 8 - Drif ex p a ndin t est
Ex pa nsio l)
%
%
R3
10
6
5
1) T is t he t hic n s in mi met r es
Trang 89.2.4 L ea kt ig t nes t est
Tub es sha ll p a ss a hy dr a ulc pres ure t est a t a pr es ur e of
5 MPa (5 ba r ) A difer ent pres ure may b e use , b y a gre -
me t b et wee t he p r cha ser a nd ma ufa tur er
The ma uf actur er may su stit ut e for this t est a not her typ e of
t est w hic g a ra nt ees a n e uiva le t q a lit y
9.2.5 V isua l insp ct io
With a ll t ub s a visua l insp c tio sh l b e ma de, a s far a s
p s ible, of t he ex t erna l a d int er nal sur fa es
a ) t he ma ufa t ur er ’s mar k;
b) t he gra de of st eel (se t a b le 2)
cl t he d lvery c n itio
The t ub s sh l b e d lvered w ith sur fa e pr ote t io Unles
ot her w ise a gre d, t he ma ufa tur er ’s st an ar d mi pr ot ectio
may b e use
9.2.6 Co tr ol of dime sio s
The t ub es sh l b e c hec ke for c ompla nc e w ith diamet er a nd
t hic n s
The sp cific t io s of IS0 4 4 ap p ly
The sp cif ica tio s of IS0 4 4 a p p ly
The t ub s sh l b e ma r ke b y la b els w hic a re f ix ed sec urely to
t he b n le or c r a t e c nt ainin t he t ub s, a d w hic sha ll c n-
t ain t he folow in infor matio :
If a c c ept a nc e t est s a re agre d in t he or de a w or ks c r t if ic t e
sh l b e su ple , r ela t in to t he t est s prov id d for in c la use 9
The t yp e of d c me t su ple sha ll b e in a c cor da nc e w it h
IS0 4 4
In t he event of a c mplaint , t he ma ufa tur er sha ll have a n
o p r t unit y to c hec k t he me t of t he cla im w ithin a rea so a ble
t ime The c ntest ed it ems sh l remain ava ila b le for this
p urpose
In pa r t ic la if imp r f ectio s ap p ear afer sub se u nt use b y
t he p r c ha se it is n c es a ry to su mit t he pr od ct to a c e k
Trang 9Outside dia met er
T hicn s ), It ’
I
S r iesl
Tde-
InS
r a nc e
homin l \i
14
-t -i
16
f 0.10
~ 3 0,?ol 2,4 M,Jo~ 2fO,3 I 1,60.3
4fO.r ) 3,4*0,3 3f 0.3 1.6f 0.3
5k.21 4,4 *0,?51 4 *& z 1 3.6io.3 1 3*0,3ot 2,4*0,4 0/ 2k.4 0
3.6 f 0.4 0 3iO.40
5,6 f 0.35 5f 8.35
7,5 f 0,m
7f0.3 6,4 i 0.4 0 6 t O,QI -
1 ,6~,20 1 fo,za 10,4 *0,3l 10*0,3o 9f0.35 8k 35
17 f 0.10 16.4f 0.10 16f 0.10 15,6fO,lO 15f0.10 14,4 *0.10
14 f 0.10 13,6~ ,20 13f 0.20 12.4 *o,% I 12*o.m 1 kO.35 lOkO.35 9io.35
19f o.10 18,4*0,10 18f 0.10 17.6~ 10 17f0.10 16,40,10 16fo.10 15.6 k 0.15 15f 0.15 14 ,4*0,15 14 *0,20 13*0,3 12 * 0,35 1 f0.35
21io.10 20,4 i0,10 20*0,lo 19,6f o,'o 19io.10 18,4h ,10 18*0,10 17 ,6~ 10 17 * 0,15 16,4*0,15 16iO.15 15*0,20 14r 0.3 13t 0,3
24 1t o.10 23,4kO,lo 23i0.10 2,6i0,10 2k.10 21,4 ~0,10 21f 0.10 20.6t 0,10 20 f 0.10 19,4 f 0.15 191 0,15 16f 0.15 17f o.zl 16~ ,20
27 *o,ro X,4 *0,10 2f 0,10 2,6kO,lO 2~ ,lO 2,4*0,10 24 io.10 23,6 k 0.10 23i 0.10 2,4 fO,lO 2 * 0,15 21f 0.15 2uf 0.15 19io.15
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1) Se IS0 4 0 for d finitio of se es The clas ific t io of t he o tsid dia met er is t he seme
2) T hic kn s es in pa rent heses sha ll b e a v oid d wherever p os ible
3) Tolera nc e o thic n s for t ub s of o t sid dia met e 4 a nd 5 mm : f 2 %,
Trang 10le 9 - Dime sio s
V a lu s in mi metr es