BSI Standards Publication

BS EN ISO 5817:2014

Welding — Fusion-weldedjoints in steel, nickel, titaniumand their alloys (beam weldingexcluded) — Quality levels forimperfections

Tabl

e 1

— L

imit

s fo

r im

perf

ecti

ons

No.

Ref

eren

ce to

IS

O 6

520-

1Im

perf

ecti

on

desi

gnat

ion

Rem

arks

t

mm

Lim

its

for

impe

rfec

tion

s fo

r qu

alit

y le

vels

DC

B

1 S

urfa

ce im

perf

ecti

ons

1.1

100

Crac

k≥

0,5

Not

per

mit

ted

Not

per

mit

ted

Not

per

mit

ted

1.2

104

Crat

er c

rack

≥ 0,

5N

ot p

erm

itte

dN

ot p

erm

itte

dN

ot p

erm

itte

d

1.3

2017

Surf

ace

pore

Max

imum

dim

ensi

on o

f a s

ingl

e po

re fo

r

— b

utt w

elds

— fi

llet w

elds

0,5

to 3

d ≤

0,3

s

d ≤

0,3

a

Not

per

mit

ted

Not

per

mit

ted

Max

imum

dim

ensi

on o

f a s

ingl

e po

re fo

r

— b

utt w

elds

— fi

llet w

elds

> 3

d ≤

0,3

s, bu

t max

. 3 m

m

d ≤

0,3

a, b

ut m

ax. 3

mm

d ≤

0,2

s, bu

t max

. 2 m

m

d ≤

0,2

a, b

ut m

ax. 2

mm

Not

per

mit

ted

1.4

2025

End

crat

er

pipe

0,5

to 3

> 3

h ≤

0,2

t

h ≤

0,2

t, bu

t max

. 2 m

m

Not

per

mit

ted

h ≤

0,1

t, bu

t max

. 1 m

m

Not

per

mit

ted

Not

per

mit

ted

1.5

401

Lack

of f

usio

n (i

ncom

plet

e fu

sion

)—

≥ 0,

5N

ot p

erm

itte

dN

ot p

erm

itte

dN

ot p

erm

itte

d

Mic

ro la

ck o

f fu

sion

Onl

y de

tect

able

by

mic

ro e

xam

inat

ion

≥ 0,

5Pe

rmit

ted

Perm

itte

dN

ot p

erm

itte

d

1.6

4021

Inco

mpl

ete

root

pen

etra

-tio

n

Onl

y fo

r sin

gle

side

but

t wel

ds≥

0,5

Shor

t im

perf

ectio

ns:

h ≤

0,2

t but

max

. 2 m

mN

ot p

erm

itte

dN

ot p

erm

itte

d

5

N

o.R

efer

ence

to

ISO

652

0-1

Impe

rfec

tion

de

sign

atio

nR

emar

kst

mm

Lim

its

for

impe

rfec

tion

s fo

r qu

alit

y le

vels

DC

B

1.7

5011

Cont

inuo

us

unde

rcut

Smoo

th tr

ansi

tion

is re

quir

ed.

This

is n

ot re

gard

ed a

s a s

yste

mat

ic im

perf

ec-

tion.

0,5

to 3

Shor

t im

perf

ectio

ns:

h ≤

0,2

tSh

ort i

mpe

rfec

tions

: h

≤ 0,

1 t

Not

per

mit

ted

5012

Inte

rmit

tent

un

derc

ut>

3h

≤ 0,

2 t,

but m

ax. 1

mm

h ≤

0,1

t, bu

t max

. 0,5

mm

h ≤

0,05

t, b

ut m

ax.

0,5

mm

1.8

5013

Shri

nkag

e gr

oove

Smoo

th tr

ansi

tion

is re

quir

ed.

0,5

to 3

Shor

t im

perf

ectio

ns:

h ≤

0,2

mm

+ 0

,1 t

Shor

t im

perf

ectio

ns:

h ≤

0,1

tN

ot p

erm

itte

d

> 3

Shor

t im

perf

ectio

ns:

h ≤

0,2

t, bu

t max

. 2 m

mSh

ort i

mpe

rfec

tions

: h

≤ 0,

1 t,

but m

ax.1

mm

Shor

t im

perf

ectio

ns:

h ≤

0,05

t, b

ut m

ax.

0,5

mm

1.9

502

Exce

ss w

eld

met

al (b

utt

wel

d)

Smoo

th tr

ansi

tion

is re

quir

ed.

≥ 0,

5h

≤ 1

mm

+ 0

,25

b, b

ut

max

. 10

mm

h ≤

1 m

m +

0,1

5 b,

but

m

ax. 7

mm

h ≤

1 m

m +

0,1

b,b

ut m

ax.

5 m

m

6

No.

Ref

eren

ce to

IS

O 6

520-

1Im

perf

ecti

on

desi

gnat

ion

Rem

arks

t

mm

Lim

its

for

impe

rfec

tion

s fo

r qu

alit

y le

vels

DC

B

1.10

503

Exce

ssiv

e co

n-ve

xity

(fill

et

wel

d)

≥ 0,

5h

≤ 1

mm

+ 0

,25

b, b

ut

max

. 5 m

mh

≤ 1

mm

+ 0

,15

b, b

ut

max

. 4 m

mh

≤ 1

mm

+ 0

,1 b

, but

m

ax. 3

mm

1.11

504

Exce

ss p

en-

etra

tion

0,5

to 3

> 3

h ≤

1 m

m +

0,6

b

h ≤

1 m

m +

1,0

b, b

ut

max

. 5 m

m

h ≤

1 m

m +

0,3

b

h ≤

1 m

m +

0,6

b, b

ut m

ax.

4 m

m

h ≤

1 m

m +

0,1

b

h ≤

1 m

m +

0,2

b,b

ut

max

. 3 m

m

7

N

o.R

efer

ence

to

ISO

652

0-1

Impe

rfec

tion

de

sign

atio

nR

emar

kst

mm

Lim

its

for

impe

rfec

tion

s fo

r qu

alit

y le

vels

DC

B

1.12

505

Inco

rrec

t wel

d to

e—

but

t wel

ds≥

0,5

α ≥

90°

α ≥

110°

α ≥

150°

— fi

llet w

elds

≥ 0,

5α

≥ 90

°α

≥ 10

0°α

≥ 11

0°

α 1 ≥

α a

nd α

2 ≥ α

1.13

506

Ove

rlap

≥ 0,

5h

≤ 0,

2 b

Not

per

mit

ted

Not

per

mit

ted

1.14

509

Sagg

ing

Smoo

th tr

ansi

tion

is re

quir

ed0,

5 to

3Sh

ort i

mpe

rfec

tions

: h

≤ 0,

25 t

Shor

t im

perf

ectio

ns:

h ≤

0,1

tN

ot p

erm

itte

d

511

Inco

mpl

etel

y fil

led

groo

ve>

3Sh

ort i

mpe

rfec

tions

: h

≤ 0,

25 t,

but

max

. 2

mm

Shor

t im

perf

ectio

ns:

h ≤

0,1

t, bu

t max

. 1 m

mSh

ort i

mpe

rfec

tions

: h

≤ 0,

05 t,

but

max

. 0,

5 m

m

8

No.

Ref

eren

ce to

IS

O 6

520-

1Im

perf

ecti

on

desi

gnat

ion

Rem

arks

t

mm

Lim

its

for

impe

rfec

tion

s fo

r qu

alit

y le

vels

DC

B

1.15

510

Burn

thro

ugh

—≥

0,5

Not

per

mit

ted

Not

per

mit

ted

Not

per

mit

ted

1.16

512

Exce

ssiv

e as

ymm

etry

of

fille

t wel

d (e

xces

sive

un

equa

l leg

le

ngth

)

In c

ases

whe

re a

n as

ymm

etri

c fill

et w

eld

has n

ot

been

pre

scri

bed.

≥ 0,

5h

≤ 2

mm

+ 0

,2 a

h ≤

2 m

m +

0,1

5 a

h ≤

1,5

mm

+ 0

,15

a

1.17

515

Root

con

cavi

tySm

ooth

tran

sitio

n is

requ

ired

.0,

5 to

3h

≤ 0,

2 m

m +

0,1

tSh

ort i

mpe

rfec

tions

: h

≤ 0,

1 t

Not

per

mit

ted

> 3

Shor

t im

perf

ectio

ns:

h ≤

0,2

t, bu

t max

. 2 m

mSh

ort i

mpe

rfec

tions

: h

≤ 0,

1 t,

but m

ax. 1

mm

Shor

t im

perf

ectio

ns:

h ≤

0,05

t, b

ut m

ax.

0,5

mm

9

N

o.R

efer

ence

to

ISO

652

0-1

Impe

rfec

tion

de

sign

atio

nR

emar

kst

mm

Lim

its

for

impe

rfec

tion

s fo

r qu

alit

y le

vels

DC

B

1.18

516

Root

por

osit

ySp

ongy

form

atio

n at

the

root

of a

wel

d du

e to

bu

bblin

g of

the

wel

d m

etal

at t

he m

omen

t of

solid

ifica

tion

(e. g

. lac

k of

gas

bac

king

)

≥ 0,

5Lo

cally

per

mit

ted

Not

per

mit

ted

Not

per

mit

ted

1.19

517

Poor

rest

art

—≥

0,5

Perm

itte

d

The

limit

depe

nds o

n th

e ty

pe o

f im

perf

ec-

tion

occu

rred

due

to

rest

art.

Not

per

mit

ted

Not

per

mit

ted

1.20

5213

Insu

ffic

ient

th

roat

thic

k-ne

ss

Not

app

licab

le to

pro

cess

es w

ith p

roof

of g

reat

er

dept

h of

pen

etra

tion

0,5

to 3

Shor

t im

perf

ectio

ns:

h ≤

0,2

mm

+ 0

,1 a

Shor

t im

perf

ectio

ns:

h ≤

0,2

mm

Not

per

mit

ted

> 3

Shor

t im

perf

ectio

ns:

h ≤

0,3

mm

+ 0

,1 a

, but

m

ax. 2

mm

Shor

t im

perf

ectio

ns:

h ≤

0,3

mm

+ 0

,1 a

, but

m

ax. 1

mm

Not

per

mit

ted

1.21

5214

Exce

ssiv

e th

roat

thic

k-ne

ss

The

actu

al th

roat

thic

knes

s of t

he fi

llet w

eld

is

too

larg

e.≥

0,5

Perm

itte

dh

≤ 1

mm

+ 0

,2 a

, but

max

. 4

mm

h ≤

1 m

m +

0,1

5 a,

but

m

ax. 3

mm

10

No.

Ref

eren

ce to

IS

O 6

520-

1Im

perf

ecti

on

desi

gnat

ion

Rem

arks

t

mm

Lim

its

for

impe

rfec

tion

s fo

r qu

alit

y le

vels

DC

B

1.22

601

Stra

y ar

c—

≥ 0,

5Pe

rmit

ted,

if th

e pr

op-

ertie

s of t

he p

aren

t m

etal

are

not

affe

cted

.

Not

per

mit

ted

Not

per

mit

ted

1.23

602

Spat

ter

—≥

0,5

Acce

ptan

ce d

epen

ds

on a

pplic

atio

n, e

.g.

mat

eria

l, co

rros

ion

prot

ectio

n

Acce

ptan

ce d

epen

ds o

n ap

plic

atio

n, e

.g. m

ater

ial,

corr

osio

n pr

otec

tion

Acce

ptan

ce d

epen

ds o

n ap

plic

atio

n, e

.g. m

ater

ial,

corr

osio

n pr

otec

tion

1.24

610

Tem

per c

olou

r (D

isco

lour

a-tio

n)

—≥

0,5

Acce

ptan

ce d

epen

ds

on a

pplic

atio

n, e

.g.

mat

eria

l, co

rros

ion

prot

ectio

n

Acce

ptan

ce d

epen

ds o

n ap

plic

atio

n, e

.g. m

ater

ial,

corr

osio

n pr

otec

tion

Acce

ptan

ce d

epen

ds o

n ap

plic

atio

n, e

.g. m

ater

ial,

corr

osio

n pr

otec

tion

11

N

o.R

efer

ence

to

ISO

652

0-1

Impe

rfec

tion

de

sign

atio

nR

emar

kst

mm

Lim

its

for

impe

rfec

tion

s fo

r qu

alit

y le

vels

DC

B

2 I

nter

nal i

mpe

rfec

tion

s

2.1

100

Crac

ksAl

l typ

es o

f cra

ck e

xcep

t mic

rocr

acks

and

cra

ter

crac

ks≥

0,5

Not

per

mit

ted

Not

per

mit

ted

Not

per

mit

ted

2.2

1001

Mic

rocr

acks

A cr

ack

usua

lly o

nly

visi

ble

unde

r the

mic

ro-

scop

e (5

0 ×

)≥

0,5

Perm

itte

dAc

cept

ance

dep

ends

on

type

of p

aren

t met

al w

ith

part

icul

ar re

fere

nce

to

crac

k se

nsiti

vity

Acce

ptan

ce d

epen

ds o

n ty

pe o

f par

ent m

etal

w

ith p

artic

ular

refe

r-en

ce to

cra

ck se

nsiti

vity

2.3

2011

2012

Gas p

ore

Unifo

rmly

di

stri

bute

d po

rosi

ty

The

follo

win

g co

nditi

ons a

nd li

mit

s for

impe

r-fe

ctio

ns sh

all b

e fu

lfille

d. S

ee a

lso

Anne

x A

for

info

rmat

ion.

a1)

Max

imum

dim

ensi

on o

f the

are

a of

the

impe

rfec

tions

(inc

lusi

ve o

f sys

tem

atic

impe

rfec

-tio

n) re

late

d to

the

proj

ecte

d ar

ea

NO

TE T

he p

oros

ity

in th

e pr

ojec

t are

a de

pend

s on

the

num

bers

of l

ayer

s (vo

lum

e of

the

wel

d).

≥ 0,

5Fo

r sin

gle

laye

r: ≤

2,5

%

For m

ulti-

laye

r: ≤

5 %

For s

ingl

e la

yer:

≤ 1

,5 %

For m

ulti-

laye

r: ≤

3 %

For s

ingl

e la

yer:

≤ 1

%

For m

ulti-

laye

r: ≤

2 %

a2)

Max

imum

dim

ensi

on o

f the

cro

ss-s

ectio

nal

area

of t

he im

perf

ectio

ns (i

nclu

sive

of s

yste

mat

ic

impe

rfec

tion)

rela

ted

to th

e fr

actu

re a

rea

(onl

y ap

plic

able

to te

st p

iece

s: p

rodu

ctio

n te

st, w

elde

r or

pro

cedu

re q

ualif

icat

ion

test

s)

≥ 0,

5≤

2,5

%≤

1,5

%≤

1 %

b)

Max

imum

dim

ensi

on fo

r a s

ingl

e po

re fo

r

— b

utt w

elds

— fi

llet w

elds

≥ 0,

5d

≤ 0,

4 s,

but m

ax. 5

mm

d ≤

0,4

a, b

ut m

ax. 5

mm

d ≤

0,3

s, bu

t max

. 4 m

m

d ≤

0,3

a, b

ut m

ax. 4

mm

d ≤

0,2

s, bu

t max

. 3 m

m

d ≤

0,2

a, b

ut m

ax. 3

mm

12

No.

Ref

eren

ce to

IS

O 6

520-

1Im

perf

ecti

on

desi

gnat

ion

Rem

arks

t

mm

Lim

its

for

impe

rfec

tion

s fo

r qu

alit

y le

vels

DC

B

2.4

2013

Clus

tere

d (l

ocal

ized

) po

rosi

ty

≥ 0,

5d A

≤ 2

5 m

m

or

d A, m

ax ≤

wp

d A ≤

20

mm

or

d A, m

ax ≤

wp

d A ≤

15

mm

or

d A, m

ax ≤

wp/

2

Refe

renc

e le

ngth

for l

p is 1

00 m

m.

The

tota

l gas

por

e ar

ea w

ithin

the

clus

ter i

s rep

-re

sent

ed b

y a

circ

le o

f dia

met

er d

A su

rrou

ndin

g al

l the

gas

por

es.

The

requ

irem

ent f

or a

sing

le g

as p

ore

shal

l be

met

by

all t

he g

as p

ores

with

in th

is c

ircl

e.

A pe

rmit

ted

poro

us a

rea

shal

l be

loca

l. Th

e po

ssi-

bilit

y of

the

pore

clu

ster

mas

king

oth

er im

perf

ec-

tions

shal

l be

take

n in

to c

onsi

dera

tion.

If D

is le

ss th

an d

A1 o

r dA2

, whi

chev

er is

smal

ler,

then

the

tota

l gas

por

e ar

ea is

repr

esen

ted

by a

ci

rcle

of d

iam

eter

dAC

, whe

re d

AC =

dA1

+ d

A2 +

D.

Syst

emat

ic c

lust

er p

oros

ity

is n

ot p

erm

itte

d.

d A c

orre

spon

ds to

dA1

, dA2

or d

AC, w

hich

ever

is

appl

icab

le.

13

N

o.R

efer

ence

to

ISO

652

0-1

Impe

rfec

tion

de

sign

atio

nR

emar

kst

mm

Lim

its

for

impe

rfec

tion

s fo

r qu

alit

y le

vels

DC

B

2.5

2014

Line

ar p

oros

-it

y—

but

t wel

ds≥

0,5

h ≤

0,4

s, bu

t max

. 4 m

m

l ≤ s,

but

max

. 75

mm

h ≤

0,3

s, bu

t max

. 3 m

m

l ≤ s,

but

max

. 50

mm

h ≤

0,2

s, bu

t max

. 2 m

m

l ≤ s,

but

max

. 25

mm

— fi

llet w

elds

≥ 0,

5h

≤ 0,

4 a,

but

max

. 4 m

m

l ≤ a

, but

max

. 75

mm

h ≤

0,3

a, b

ut m

ax. 3

mm

l ≤ a

, but

max

. 50

mm

h ≤

0,2

a, b

ut m

ax. 2

mm

l ≤ a

, but

max

. 25

mm

Case

1 (D

> d

2)

Case

2 (D

< d

2)

Refe

renc

e le

ngth

for l

p is 1

00 m

m.

For c

ase

1: d

1 = h

For c

ase

2: d

1 + d

2 + D

= h

14

No.

Ref

eren

ce to

IS

O 6

520-

1Im

perf

ecti

on

desi

gnat

ion

Rem

arks

t

mm

Lim

its

for

impe

rfec

tion

s fo

r qu

alit

y le

vels

DC

B

2.6

2015

2016

Elon

gate

d ca

vity

Wor

mho

les

— b

utt w

elds

≥ 0,

5h

≤ 0,

4 s,

but m

ax. 4

mm

l ≤ s,

but

max

. 75

mm

h ≤

0,3

s, bu

t max

. 3 m

m

l ≤ s,

but

max

. 50

mm

h ≤

0,2

s, bu

t max

. 2 m

m

l ≤ s,

but

max

. 25

mm

— fi

llet w

elds

≥ 0,

5h

≤ 0,

4 a,

but

max

. 4 m

m

l ≤ a

, but

max

. 75

mm

h ≤

0,3

a, b

ut m

ax. 3

mm

l ≤ a

, but

max

. 50

mm

h ≤

0,2

a, b

ut m

ax. 2

mm

l ≤ a

, but

max

. 25

mm

2.7

202

Shri

nkag

e ca

vity

≥ 0,

5Sh

ort i

mpe

rfec

tions

pe

rmit

ted,

but

not

br

eaki

ng o

f the

sur

-fa

ces:

butt

wel

ds: h

≤ 0

,4 s,

but

m

ax. 4

mm

fille

t wel

ds: h

≤ 0

,4 a

, bu

t max

. 4 m

m

Not

per

mit

ted

Not

per

mit

ted

2.8

2024

Crat

er p

ipe

0,5

to 3

> 3

h or

l ≤

0,2

t

h or

l ≤

0,2

t, bu

t max

. 2

mm

Not

per

mit

ted

Not

per

mit

ted

The

larg

er v

alue

of h

or l

will

be

mea

sure

d

2.9

300

301

302

303

Solid

incl

usio

ns

Slag

incl

usio

ns

Flux

incl

usio

ns

Oxi

de in

clus

ions

— b

utt w

elds

≥ 0,

5h

≤ 0,

4 s,

but m

ax. 4

mm

l ≤ s,

but

max

. 75

mm

h ≤

0,3

s, bu

t max

. 3 m

m

l ≤ s,

but

max

. 50

mm

h ≤

0,2

s, bu

t max

. 2 m

m

l ≤ s,

but

max

. 25

mm

— fi

llet w

elds

≥ 0,

5h

≤ 0,

4 a,

but

max

. 4 m

m

l ≤ a

, but

max

. 75

mm

h ≤

0,3

a, b

ut m

ax. 3

mm

l ≤ a

, but

max

. 50

mm

h ≤

0,2

a, b

ut m

ax. 2

mm

l ≤ a

, but

max

. 25

mm

15

N

o.R

efer

ence

to

ISO

652

0-1

Impe

rfec

tion

de

sign

atio

nR

emar

kst

mm

Lim

its

for

impe

rfec

tion

s fo

r qu

alit

y le

vels

DC

B

2.10

304

Met

allic

incl

u-si

ons o

ther

th

an c

oppe

r

— b

utt w

elds

≥ 0,

5h

≤ 0,

4 s,

but m

ax. 4

mm

h ≤

0,3

s, bu

t max

. 3 m

mh

≤ 0,

2 s,b

ut m

ax. 2

mm

— fi

llet w

elds

≥ 0,

5h

≤ 0,

4 a,

but

max

. 4 m

mh

≤ 0,

3 a,

but

max

. 3 m

mh

≤ 0,

2 a,

but

max

. 2 m

m

2.11

3042

Copp

er in

clu-

sion

s—

≥ 0,

5N

ot p

erm

itte

dN

ot p

erm

itte

dN

ot p

erm

itte

d

2.12

401

Lack

of f

usio

n (i

ncom

plet

e fu

sion

)

≥ 0,

5Sh

ort i

mpe

rfec

tions

pe

rmit

ted:

butt

wel

ds: h

≤ 0

,4 s,

but

m

ax. 4

mm

fille

t wel

ds: h

≤ 0

,4 a

bu

t max

. 4 m

m

Not

per

mit

ted

Not

per

mit

ted

4011

Lack

of s

ide

wal

l fus

ion

4012

Lack

of i

nter

-ru

n fu

sion

4013

Lack

of r

oot

fusi

on

16

No.

Ref

eren

ce to

IS

O 6

520-

1Im

perf

ecti

on

desi

gnat

ion

Rem

arks

t

mm

Lim

its

for

impe

rfec

tion

s fo

r qu

alit

y le

vels

DC

B

2.13

402

Lack

of p

en-

etra

tion

T-jo

int (

fille

t wel

d)

> 0,

5Sh

ort i

mpe

rfec

tion:

h ≤

0,2

a, b

ut m

ax. 2

mm

Not

per

mit

ted

Not

per

mit

ted

T-jo

int (

part

ial p

enet

ratio

n)

Butt

join

t (pa

rtia

l pen

etra

tion)

≥ 0,

5Sh

ort i

mpe

rfec

tions

: bu

tt jo

int:

h ≤

0,2s

or i

, bu

t max

. 2 m

m

T-jo

int:

h ≤

0,2a

, but

m

ax. 2

mm

Shor

t im

perf

ectio

ns:

butt

join

t: h

≤ 0,

1 s o

r i,

but m

ax. 1

,5 m

m

fille

t joi

nt: h

≤ 0

,1 a

, but

m

ax. 1

,5 m

m

Not

per

mit

ted

Butt

join

t (fu

ll pe

netr

atio

n)

≥ 0,

5Sh

ort i

mpe

rfec

tion:

h ≤

0,2

t, bu

t max

. 2 m

m

Not

per

mit

ted

Not

per

mit

ted

17

N

o.R

efer

ence

to

ISO

652

0-1

Impe

rfec

tion

de

sign

atio

nR

emar

kst

mm

Lim

its

for

impe

rfec

tion

s fo

r qu

alit

y le

vels

DC

B

3 I

mpe

rfec

tion

s in

join

t geo

met

ry

3.1

507

Line

ar m

is-

alig

nmen

tTh

e lim

its r

elat

e to

dev

iatio

ns fr

om th

e co

rrec

t po

sitio

n. U

nles

s oth

erw

ise

spec

ified

, the

cor

rect

po

sitio

n is

that

whe

n th

e ce

ntre

lines

coi

ncid

e (s

ee a

lso

Clau

se 1

). t r

efer

s to

the

smal

ler t

hick

-ne

ss.

5071

Line

ar m

is-

alig

nmen

t be

twee

n pl

ates

Plat

es a

nd lo

ngit

udin

al w

elds

0,5

to 3

> 3

h ≤

0,2

mm

+ 0

,25

t

h ≤

0,25

t bu

t max

. 5 m

m

h ≤

0,2

mm

+ 0

,15

t

h ≤

0,15

t, b

ut m

ax. 4

mm

h ≤

0,2

mm

+ 0

,1 t

h ≤

0,1

t, bu

t max

. 3 m

m

5072

Tran

sver

sely

ci

rcul

ar w

elds

at

cyl

indr

ical

ho

llow

sec-

tions

Circ

umfe

rent

ial w

elds

≥ 0,

5h

≤ 0,

5 t,

but m

ax. 4

mm

h ≤

0,5

t, bu

t max

. 3 m

mh

≤ 0,

5 t,

but m

ax. 2

mm

3.2

617

Inco

rrec

t roo

t ga

p fo

r fill

et

wel

ds

Gap

betw

een

the

part

s to

be jo

ined

. Gap

s exc

eed-

ing

the

appr

opri

ate

limit

may

, in

cert

ain

case

s, be

co

mpe

nsat

ed fo

r by

a co

rres

pond

ing

incr

ease

in

the

thro

at th

ickn

ess.

0,5

to 3

h ≤

0,5

mm

+ 0

,1 a

h ≤

0,3

mm

+ 0

,1 a

h ≤

0,2

mm

+ 0

,1 a

> 3

h ≤

1 m

m +

0,3

a,

but m

ax. 4

mm

h ≤

0,5

mm

+ 0

,2 a

, bu

t max

. 3 m

mh

≤ 0,

5 m

m +

0,1

a,

but m

ax. 2

mm

18

No.

Ref

eren

ce to

IS

O 6

520-

1Im

perf

ecti

on

desi

gnat

ion

Rem

arks

t

mm

Lim

its

for

impe

rfec

tion

s fo

r qu

alit

y le

vels

DC

B

4 M

ulti

ple

impe

rfec

tion

s

4.1

Non

e

Mul

tiple

im

perf

ectio

ns

in a

ny c

ross

se

ctio

n

h 1 +

h2 +

h3 +

h4 =

∑h

h 1 +

h2 +

h3 =

∑h

0,5

to 3

> 3

Not

per

mit

ted

Max

imum

tota

l hei

ght

of im

perf

ectio

ns:

Σ h

≤ 0,

4 t o

r ≤ 0

,25

a

Not

per

mit

ted

Max

imum

tota

l hei

ght o

f im

perf

ectio

ns:

Σ h

≤ 0,

3 t o

r ≤ 0

,2 a

Not

per

mit

ted

Max

imum

tota

l hei

ght o

f im

perf

ectio

ns:

Σ h

≤ 0,

2 t o

r ≤ 0

,15

a

19

N

o.R

efer

ence

to

ISO

652

0-1

Impe

rfec

tion

de

sign

atio

nR

emar

kst

mm

Lim

its

for

impe

rfec

tion

s fo

r qu

alit

y le

vels

DC

B

4.2

Non

e

Proj

ecte

d or

cr

oss-

sec-

tiona

l are

a in

lo

ngit

udin

al

dire

ctio

n

Case

1 (D

> l 3

)

hl

hl

hl

hl

11

22

33

×+

×+

×=

×Σ

Case

2 (D

< l 3

)

hl

hl

hh

Dh

lhl

11

22

23

33

2×

+×

++

×

+×

=×

Σ

≥ 0,

5Σ

h ×

l ≤ 1

6 %

Σ h

× l ≤

8 %

Σ h

× l ≤

4 %

The

sum

of t

he a

reas

Σ h

× l

shal

l be

calc

ulat

ed

as a

per

cent

age

to th

e ev

alua

tion

area

l p ×

wp

(cas

e 1)

.

If D

is sm

alle

r tha

n th

e sh

orte

r len

gth

of o

ne o

f th

e ne

ighb

ouri

ng im

perf

ectio

ns, t

he fu

ll co

nnec

-tio

n of

the

two

impe

rfec

tions

shal

l be

appl

ied

to

the

sum

of i

mpe

rfec

tions

(cas

e 2)

.

See

also

Ann

ex A

for i

nfor

mat

ion.

20

D

esig

nati

on

To in

dica

te th

at th

e qu

ality

requ

irem

ent i

nclu

des t

he re

quir

emen

ts in

Ann

ex C

the

desi

gnat

ion

for l

evel

B

and

C is

supp

lem

ente

d w

ith th

e ch

arac

ter f

atig

ue c

lass

. Lev

el D

is n

ot su

pple

men

ted.

EXAM

PLE

1 IS

O 5

817-

C63

EXAM

PLE

2 IS

O 5

817-

B90

EXAM

PLE

3 IS

O 5

817-

B125

Tabl

e C.

1 —

Add

itio

nal r

equi

rem

ents

to T

able

1 fo

r w

elds

sub

ject

to fa

tigu

e lo

ad

No.

Ref

eren

ce to

IS

O 65

20-1

Impe

rfec

tion

de

sign

atio

nt

mm

Lim

its

for

impe

rfec

tion

s fo

r qu

alit

y le

vels

C 63

cB

90 c

B 12

5

1.5

401

Mic

ro la

ck o

f fus

ion

≥ 0,

5a

aa

1.7

5011

5012

Cont

inuo

us u

nder

cut

Inte

rmit

tent

und

ercu

t>

3a

aN

ot p

erm

itte

d

1.8

5013

Shri

nkag

e gr

oove

> 3

aa

Not

per

mit

ted

1.9

502

Exce

ss w

eld

met

al

(but

t wel

d)≥

0,5

aa

h ≤

0,2

mm

+ 0

,1 b

, m

ax. 2

mm

1.10

503

Exce

ssiv

e co

nvex

ity

(fill

et w

eld)

≥ 0,

5a

ab

1.11

504

Exce

ss p

enet

ratio

n0,

5 to

3a

ah

≤ 0,

2 m

m +

0,0

5 b

> 3

aa

h ≤

0,2

mm

+ 0

,05

b, b

ut

max

. 1 m

m

1.12

505

Inco

rrec

t wel

d to

e,

wel

d to

e an

gle

for f

il-le

t wel

ds

≥ 0,

5a

aa

—50

52In

corr

ect w

eld

toe,

w

eld

toe

radi

us≥

0,5

bb

r ≥ 4

mm

1.14

509

511

Sagg

ing

Inco

mpl

etel

y fil

led

groo

ve

> 3

aa

Not

per

mit

ted

1.16

512

Exce

ssiv

e as

ym-

met

ry o

f fill

et w

eld

(exc

essi

ve u

nequ

al le

g le

ngth

)

≥ 0,

5a

ab

1.17

515

Root

con

cavi

ty>

3a

aN

ot p

erm

itte

d

1.23

602

Spat

ter

≥ 0,

5a

aN

ot p

erm

itte

da

Sam

e va

lues

as g

iven

for q

ualit

y le

vels

B a

nd C

resp

ecti

vely

Tab

le 1

.b

Not

def

ined

.c

Valu

es id

entic

al w

ith II

W-D

oc. X

III-2

323–

10. T

he v

alue

s are

pro

ved

by II

W fo

r a m

ater

ial t

hick

ness

of 1

0 m

m a

nd a

bove

. Lo

wer

mat

eria

l thi

ckne

sses

may

be

appl

icab

le.

d Th

e lim

it of

impe

rfec

tion

corr

espo

nds t

o th

e ra

tio b

etw

een

the

sum

of t

he d

iffer

ent p

ore

area

s and

the

eval

uatio

n ar

ea.

If th

e di

stan

ce b

etw

een

two

pore

are

as is

less

than

the

diam

eter

of s

mal

lest

por

e ar

ea, a

n en

velo

pe s

urro

undi

ng th

e bo

th

pore

are

as is

rel

evan

t as o

ne a

rea

of im

perf

ectio

n. If

the

dist

ance

bet

wee

n tw

o po

res i

s sm

alle

r tha

n th

e di

amet

er o

f one

of

the

neig

hbou

ring

por

es, t

he fu

ll co

nnec

ted

area

of t

wo

pore

s is t

he s

um o

f im

perf

ectio

n ar

eas.

25

No.

Ref

eren

ce to

IS

O 65

20-1

Impe

rfec

tion

de

sign

atio

nt

mm

Lim

its

for

impe

rfec

tion

s fo

r qu

alit

y le

vels

C 63

cB

90 c

B 12

5

2.3

2011

2012

Gas p

ore

Unifo

rmly

dis

trib

uted

po

rosi

ty

≥ 0,

5a

afo

r sin

gle

laye

r: ≤

1 %

for m

ulti-

laye

r: ≤

2 %

d ≤

0,1

s, m

ax. 1

mm

2.4

2013

Clus

tere

d (l

ocal

ized

) po

rosi

ty≥

0,5

a≤

3 %

d

d ≤

0,2

s,

d ≤

0,2

a,

d ≤

2,5

mm

≤ 2

% d

d ≤

0,1

s, m

ax. 0

,5 m

m

2.5

2014

Line

ar p

oros

ity

≥ 0,

5a

afo

r sin

gle

laye

r: ≤

1 %

d

for m

ulti-

laye

r: ≤

2 %

d

d ≤

0,1

s, m

ax. 1

mm

2.6

2015

2016

Elon

gatio

n ca

vity

Wor

mho

les

≥ 0,

5a

h ≤

0,2

s or 0

,2 a

max

. h =

2 m

m

as w

elde

d: m

ax.

l = 2

,5 m

m; s

tres

s re

lieve

d: l

≤ 20

mm

a

2.9

300

301

302

302

Solid

incl

usio

ns

Slag

incl

usio

ns

Flux

incl

usio

ns

Oxi

de in

clus

ions

≥ 0,

5a

h ≤

0,2

s or 0

,2 a

max

. h =

2 m

m

as w

elde

d: m

ax.

l = 2

,5 m

m

stre

ss re

lieve

d:

l ≤ 2

0 m

m

Not

per

mit

ted

3.1

5071

Line

ar m

isal

ignm

ent

betw

een

plat

es≥

0,5

ah

≤ 0,

1t

max

. 3 m

m

h ≤

0,05

t

max

. 1,5

mm

5072

Tran

sver

sely

cir

cula

r

wel

ds a

t cyl

indr

ical

hollo

w se

ctio

ns

≥ 0,

5a

h ≤

0,5

t

max

. 1 m

m

a

3.3

508

Angu

lar m

isal

ign-

men

t b≥

0,5

β ≤

2°β

≤ 1°

β ≤

1°

a Sa

me

valu

es a

s giv

en fo

r qua

lity

leve

ls B

and

C re

spec

tive

ly T

able

1.

b N

ot d

efin

ed.

c Va

lues

iden

tical

with

IIW

-Doc

. XII

I-232

3–10

. The

val

ues a

re p

rove

d by

IIW

for a

mat

eria

l thi

ckne

ss o

f 10

mm

and

abo

ve.

Low

er m

ater

ial t

hick

ness

es m

ay b

e ap

plic

able

.d

The

limit

of im

perf

ectio

n co

rres

pond

s to

the

ratio

bet

wee

n th

e su

m o

f the

diff

eren

t por

e ar

eas a

nd th

e ev

alua

tion

area

. If

the

dist

ance

bet

wee

n tw

o po

re a

reas

is le

ss th

an th

e di

amet

er o

f sm

alle

st p

ore

area

, an

enve

lope

sur

roun

ding

the

both

po

re a

reas

is r

elev

ant a

s one

are

a of

impe

rfec

tion.

If th

e di

stan

ce b

etw

een

two

pore

s is s

mal

ler t

han

the

diam

eter

of o

ne o

f th

e ne

ighb

ouri

ng p

ores

, the

full

conn

ecte

d ar

ea o

f tw

o po

res i

s the

sum

of i

mpe

rfec

tion

area

s.

Tabl

e C.

1 (c

ontin

ued)

26

EUROPEAN STANDARD

NORME EUROPÉENNE

EUROPÄISCHE NORM

EN ISO 5817

February 2014

ICS 25.160.40 Supersedes EN ISO 5817:2007

English Version

Welding - Fusion-welded joints in steel, nickel, titanium and their alloys (beam welding excluded) - Quality levels for imperfections

(ISO 5817:2014)

Soudage - Assemblages en acier, nickel, titane et leurs alliages soudés par fusion (soudage par faisceau exclu) -

Niveaux de qualité par rapport aux défauts (ISO 5817:2014)

Schweißen - Schmelzschweißverbindungen an Stahl, Nickel, Titan und deren Legierungen (ohne Strahlschweißen) - Bewertungsgruppen von

Unregelmäßigkeiten (ISO 5817:2014)

This European Standard was approved by CEN on 4 January 2014. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.

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Ref. No. EN ISO 5817:2014 E