Butt-Weld Fittings / Clamps - RO-FI Edelstahl

STAINLESS STEEL
Butt-Weld Fittings / Clamps
TECHNICAL INFORMATION, APPLICATION AREAS
MATERIALS, ORDER INFORMATION
RO-FI Precision in Stainless Steel
Zuverlässigkeit
durch Qualitätsmanagement
Reliability
by quality
management
Reliability by quality management - ISO 9001

Butt-Weld Fittings
Fittings for welding DIN 2609
Technical delivery conditions
The with a point • signed sections contain details of declarations,
which have to be mentioned
in order. The with two points •• signed sections contain details
about declarations, which are additional to the order.
1 application area
This norm is used for delivery of fittings acc. to DIN 2605 part 1
and part 2, DIN 2615 part 1 and part 2 (currently concepts), DIN
2616 part 1 and part 2 and DIN 2617 of unalloyed and alloyed
steel. If the fittings get appliance into the application area of
the order for control requiring special constructions according
to § 24 of the trading regulations (for example steam boiler
edict, pressure tank edict), you have to keep in mind the relevant
technical rules (for example technical rules for steam boiler and
technical rules for pressure tank).
The same applies for other application areas, which exist for
further instructions.
Comment: You have to keep in your mind that total demands and
reaction of scale which to act up in table 2, can reduce or raise the
temperature limits.
The fittings will be used for welding.
11.2007_1.000
2 Order
The selection of order details must be commit by purchaser.
•In the order you have to act up beside the standard description
of detail dimension standard always the quantity required
(quantities), the kind of certification and maybe the question for
additional technical rules.
•• Furthermore you can arrange more particulars in the order
which are according to the two points signed chapters.
3 Materials
The materials you have to choose from table 2.
•• If fittings of other materials will be produced as in table 2
denoted, is this norm apply accordingly.
The possible form of manufacture of base material are in
groups of materials combined.
The detail groups of materials have the nickname of the characterise
material and a code letter for designation.
Standards committee pipes, pipe connections and pipe lines in
DIN German institute for standardization registered society.
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4/1

Butt-Weld Fittings
Fittings for welding DIN 2609
4 Requirements
4.1 manufacturing process
Being valid the manufacturing process according to table 1. The
manufacturing process according to table 1 leave to the
manufacturer. Purchaser has to be informed about it, on
request.
The manufacturing plant have to command by competent personal
and adequate procedure, so that they can weld, deform
and handle blameless to accomplish, supervising and check.
•• If several manufacturing processes, form of base material
and/or welding process get apart of, so it is necessary to agree.
If it will be welded in production process of fittings, you have to
comply the requirements to chapter 4.1.1 – 4.1.3, the principles
and requirements of DIN 8563 part1 must be considered.
4.1.1 You have to weld the fittings so that the weldseam is welded
through and the fittings are according to the standard of
this norm. The blameless accomplishment of welding is necessary
to control.
The fittings are effective for an internal pressure loading for a
exploitation of the acceptable calculating range of 100%.
•• The assessment group of the weld seam according to DIN
8563 part 3 is to arrange especial between orderer and manufacturer.
4.1.2 At Fusion-welded fittings the weldseam have to be welded
of both sides as far as they are accessible from inside.
A local correction of the weldseam is permitted. The orderer can
ask for a throwaway evidence of the acceptability of the correction
renovation according to article 4.1.3.
The corrected parts have to undergone by a non-destructive
test.
4.1.3 •• Orderer can ask for a certificate about the discharge of
the requirements according to article 4.1. The particulars about
this certificate, especial about the test point, are arranging between
the orderer and the manufacturer. This certificate are just
considered for those steel grades, measure areas, welding processes
and welding additions which get named to him.
4.2 Condition of delivery
4.2.1 Fabrication by cold forming
By fittings which are made by cold forming you can abdicate the
heat treating if the terms of the material characteristics according
to the AD-leaflat HP 7/2 rather HP7/3 are discharged.
•• If a heat treating is necessary, you have to deliver the fittings
in the heat treatment according to table 3 as far as it is not
denoted in the standards of the base material.
4.2.2 Fabrication of hot forming
You have to deliver the fittings in the heat treatment according to
table 3 as far as in the standards of the base material nothing else
is denoted. The account of a appropriated heat treatment in the
group of materials A – H, L – S is fulfilled when material is in good
order and condition and an adequate constancy by hot forming is
secured. Considering to the same requirements by the group of
materials J and K can comply an annealing instead of a complete
recompense.
11.2007_1.000
Table 1. manufacturing process, allocated form of manufacture of base materials 1)
manufacturing hot forming cold deformed to the manuf.
process bended in the swake grinded, bended in the swake rolled 2) from solid
compressed 2) forged and compressed 2) metal machin.
machinabled
arranged
fitting arranged till DN 50
bend 1, 2, 1, 2, 3, – 1, 2, 1, 2, 3, – –
4, 5 4, 5 4, 5 4, 5
T – 1, 2, 3, 4, 5 – 1, 2, 3, – –
4, 5 4, 5
reducer – 1, 2, 3, 4, 5 – 1, 2, 3, 1, 2, 3, 5
4, 5 4, 5
Cap – 1, 2, 3, 4, 5 – 1, 2, 3, 1, 2, 3, 5
4, 5 4, 5
1) Form of manufacture of base materials
1 seamless tube
2 welded tube (just tubes with a allowance calculation
range of 100% in the weldseam)
3 sheet
4 forging
5 bars
2) At this manufacturing process can be welded too.
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Butt-Weld Fittings
Fittings for welding DIN 2609
11.2007_1.000
Table 2. base material, materials and form of manufacture
group of materials base material material form of manufacture 1) base material application
code- temperature *)
letter nickname material Nr. 1 2 3 4 5 •C
A St 37.0 St 37.0 1.0254 x DIN 1629 - 10 to 300
St 37.0 1.0254 x DIN 1626
RSt 37-2 1.0038 x x x DIN 17 100
B St 44.0 St 44.0 1.0256 x DIN 1629 - 10 to 300
St44.0 1.0256 x DIN 1626
St 44-2 1.0044 x x x DIN 17 100
C St 52.0 St 52.0 1.0421 x DIN 1629 - 10 to 300
St 52.0 1.0421 x DIN 1626
St 52-3 1.0570 x x x DIN 17 100
D StE 290.7 StE 290.7 1.0484 x x DIN 17 172 - 10 to 50
E StE 360.7 StE 360.7 1.0582 x x DIN 17 172 - 10 to 50
F St 35.8 I St 35.8 I 1.0305 x DIN 17 175 - 10 to 420
St 37.8 I 1.0315 x DIN 17 177
H I 1.0345 x DIN 17 155
H II 1.0425 x DIN 17 155
C 22.8 1.0460 x x DIN 17 243
G St 35.8 III St 35.8 III 1.0305 x DIN 17 175 - 10 to 420
St 37.8 III 1.0315 x DIN 17 177
H II 1.0425 x DIN 17 155
C 22.8 1.0460 x x DIN 17 243
H 15 Mo 3 15 Mo 3 1.5415 x DIN 17 175 - 10 to 530
x DIN 17 177
x DIN 17 155
x x DIN 17 243
J 13 CrMo 4 4 13 CrMo 44 1.7335 x DIN 17 175 - 10 to 570
x DIN 17 155
x x DIN 17 243
K 10 CrMo 9 10 10 Cr Mo 9 10 1.7380 x DIN 17 175 - 10 to 600
x DIN 17 155
x x DIN 17 243
L X 5 CrNi 18 11 X 5 CrNi 18 11 1.4301 x DIN 17 458 - 200 to 550 3)
x DIN 17 457
x x x DIN 17 440
M X 2 CrNi 19 11 X 2 CrNi 19 11 1.4306 x DIN 17 458 - 200 5) to 550 3)
x DIN 17 457
x x x DIN 17 440
N X 6 CrNiTi 18 10 X 6 CrNiTi 18 10 1.4541 x 2) DIN 17 458 - 200 5) to 550 3)
x DIN 17 457
x x x DIN 17 440
O X 5 CrNiMo 17 12 2 X 5 CrNiMo 17 12 2 1.4401 x DIN 17 458 - 200 to 550 3)
x DIN 17 457
x x x DIN 17 440
P X 2 CrNiMo 17 13 2 X 2 CrNiMo 17 13 2 1.4404 x DIN 17 458 - 200 to 550 3)
x DIN 17 457
x x x DIN 17 440
Q X 6 CrNiMoTi 17 12 2 X 6 CrNiMoTi 17 12 2 1.4571 x 2) DIN 17 458 - 200 5) to 550 3)
x DIN 17 457
x x x DIN 17 440
R WStE 355 WStE 355 1.0565 x DIN 17 179 - 20 to 400
x DIN 17 178
x x DIN 17 102
x DIN 17 103
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Butt-Weld Fittings
Fittings for welding DIN 2609
Table 2. base material, materials and form of manufacture
group of materials base material material form of manufacture 1) base material application
code- temperature *)
letter nickname material Nr. 1 2 3 4 5 •C
S TStE 355 TStE 355 1.0566 x DIN 17 179 - 60 to 50 4)
x DIN 17 178
x x DIN 17 102
x DIN 17 103
T TStE 285 TStE 285 1.0566 x DIN 17 179 - 60 to 50 4)
x DIN 17 178
x x DIN 17 102
x DIN 17 103
U 10 Ni 14 10 Ni 14 1.5637 x DIN 17 173 - 105 to 50 4)
x DIN 17 174
x x x DIN 17 280
*) Named values are cut-off values. For dimensioning use the in
the material norm stipulated values.
1) See table 1
2) The details about the acceptable utilisation factor in the
dimension standard just apply at application of cold manufactured
tubes. If you use hot manufactured tubes you have
to arrange it between orderer and manufacturer, because of
the low resistance data.
3) Until a temperature to 300°C (material group L,O) rather
350°C (material group M) rather 400°C (group of tools N, P,Q)
the material has not change so much that it at the check
according to DIN 50914 shows susceptibility against inter crystalline
corrosion .
4) The indicated values can be overtaken for a temporary operation
because at a long term application and at higher temperature
can advocate a curtailing robustness attitude at lower
temperatures.
5) At application temperatures lower than -200°C till -270°C
check of impact work at -196°C with ISOV samples, min.
account 40J for wall thickness > 10mm, at bar material and
forge material of bore > 15 mm
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Butt-Weld Fittings
Fittings for welding DIN 2609
11.2007_1.000
Table 3. teat treating
condition of delivery material group code
normallized A to H N
rather
R to S
transformed
coated J, K, U V
solution annealing L to Q L
coated or normalized T V, N
4.3 chemical composition
At the chemical composition applies the, in the respective
Norm
of base material, denoted bounds for the ordered material.
•• The product analysis which will be arranged at base material
or at the fitting, can be agreed.
4.4 mechanical properties
The mechanical properties have to comply to the given values
which are denoted in the appropriated norms of the base
material (table 2). For the notched impact strength into the
weld deposit applies the values of the base material across to
the direction of rolling.
4.5 weld ability
Concerning to the weld ability you have to consider the details
according to the norms of the base material (table 2).
4.6 surface finish
4.6.1 The fittings have to comply, to the way of manufacture, a
smooth external and internal surface.
4.6.2 Irregularities on the surface, conditional to the way of
manufacture, like signs of indentations and elevations or flat
grooves are marginal acceptable as far as the residual wall thickness
complies to the requirements.
4.6.3 The correct removal of surface defects with low-deepness
is according to the application of suitable means acceptable as
far as the residual wall thickness complies to the requirements.
Welded corrections are just with the acceptance of the orderer
acceptable.
4.6.4 •• If you have special requirements concerning to the
surface treatment, so you have to arrange it separately.
4.7 measurement and measurement tolerances
4.7.1 measurement
For the measurement applies the details in the norms of measurement.
4.7.2 measurement tolerances
4.7.2.1 For the tolerances of construction dimensions and of the
wall thickness under-usage applies the details in the norms of
measurement.
4.7.2.2 For the limiting sizes of external diameter at the pipe
connection (at the weld seam) applies table 4 (of DIN
1629/10.84, table 6).
The upper limiting size of the wall thickness at the pipe connection
(s, s1, s2) amounts to 15% of the nominal wall thickness for
all nominal bores.
4.7.2.3 For the safeguarding of throttling, the inner diameter will
be restricted to the connecting tube. (comprised also the upper
limiting sizes of wall thickness s3, s4, si and sa).
The theoretic inner diameter of the tube will be calculated as the
following.
Theoretic inner diameter = da-2 ? nominal wall thickness (connection
of wall thickness) [nominal bore diameter]
4.7.2.4 For the circularity tolerance applies:
a) on weld-end (weld-ends) of the fitting the table 4 (acc.
DIN1626/10.84, table 6)
b) for elbow according to the elbow length a difference of 4%.
The balance R of the circularity will be calculate as follows:
R = 200 • d a max --d a min
in %
d a max + d a min
following is da maximal the biggest measured external diameter,
da minimal the smallest measured external diameter (measured
in the cross-section).
4.7.2.5 For the meanderings of the fitting-geometry applies
table 5 and the pictures 1-7. You have to measure at the orthographicaly
together standing surfaces. The allowance Q may not
exceed in any place at amount. It needs to keep all measurements
of the fitting. At the inspection of the measurement Q
you have to look for that the construction dimensions in the
tolerances of the dimension standard will be complied. The
Index at the dimensional letters Q in the pictures act up to the
absolute measurement of the dimension standard after which
you have to calculate the value Q.
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Table 4. limiting sizes of external diameter and circularity tolerance
external diameter limiting sizes of external diameter circularity tolerance
d a
•• at special
mm
decleration
±1%d a
inside by legal
≤ 100 (±0,5 mm ±0,4 mm aperture
allowed)
allowance
100 > d a ≤ 200 ±1%d a ±0,5%d a
> 200 ±1%d a ±0,6%d a 2%
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Butt-Weld Fittings
Fittings for welding DIN 2609
Q da
Q d a
d
b
Q a
2
b
2
Q d a
b
2b
picture 1 picture 2 picture 3
Q d1
t 1
Q d 1
b
t 2
d
d 3 -
1
d 3
d 3
Q d 1
l
Q d 2
Q d 1
l
Q d 2
U 1
U 2
Q d1
Q d1
Q d1
a a
picture 4 picture 5 picture 6 picture 7
dimensions e a, b, d a , d 1 , d 2 , l, t 1 , t 2 , u 1 und u 2 see norms of measurement
Table 5. allowance Q
•• standard design
at special
decleration
4.7.3 wave formation at elbows
Flat waves as in picture 8 are acceptable. The medium wave
height hm may not exceed 3% of da1.
h m = d a 2 + d a 4 – d a 3 (2)
2
where
L ≥ 15 • h m (3)
d a 1
d a 2
d a 3
allowance Q
1 % of basic dimension
(1 mm allowed)
0,5 % of basic dimension
(0,5 mm allowed)
L
d a 4
4.7.4 Accomplishment of the weldends
Rule model of the edge form: ordered wall thickness of the weldends.
till 3 mm face form DIN 2559–1
above 3 mm till 16 mm face form DIN 2559–22
above 16 mm face form DIN 2559–3
•• Other face forms needs to be agreed.
5 Checking and certification about
material control
5.1 Generel
The fittings according to this norm can be delivered with one
of the following certification about material control DIN EN
10204.
– Certification DIN 102 04 – 2.2
– Certification DIN 102 04 – 3.1 A
– Certification DIN 102 04 – 3.1 B
– Certification DIN 102 04 – 3.1 C
• The kind of the desired certification has to act up with the
order.
5.2 Location of checking
The particles will be tested in the manufacturing plant. 5.3
scope of inspection
5.3 Scope of inspection
5.3.1 At the certificate according to DIN EN10204, the values for
the yield point, tensile strength and breaking elongation as far
as the case may be the completion of the in chapter 5.4.3
named requirements at the technological bending test due to
the up on to the internal checking will be confirmed.
The nominal width of the certified fittings have to comply to
the presentable production program.
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Butt-Weld Fittings
Fittings for welding DIN 2609
11.2007_1.000
5.3.2 Fittings which are delivered with the certificate according
to DIN 50049, will be tested in batches. An overview about the
scope of inspection contains table 6.
For the check, the fittings must be arranged according to material
and measurement, at da > 100 mm of alloyed steels, and
the same heat number in dependence of the external diameter
da 1) in batches of the following quantities:
d a < 100 mm . . . . . . . . . .500 pieces
100 mm ≤ d a < 350 mm . . . . . . . . . .200 pieces
d a > 350 mm . . . . . . . . . .100 pieces
for elbows according to DIN 2605 part 1 and part 2 construction
10 and 20 the maximal quantity per batch will be mottled.
Remaining quantity up to 50% of the batch-size can share out
equable of the detail batches. Quantities and remaining quantity
over 50%, also delivery quantity of less than 50% of the
batch-sizes, considered as one closed batch.
For materials, which will undergo a heat treatment, the batch is
bound to one heat treatment but for fittings with the same
heat no. of unalloyed steel, which are apart got the same heat
treatment can be checked together if the constancy of the components
at a hardness test of 10% but minimal at 3 fittings,
(according to the in the order specified certificate) are detected
to the expert. The precondition of more evenly heat treatment
deemed as fulfilled when the difference between the highest
and the lowest measured hardness have not more than 30 HB
5.3.3 For the accomplishment of the assay, for the class of material
A-G and R-T at a test piece, for the class of material H-Q and
U at two test pieces, you have to take one assay per batch after
the last heat treatment. The checkout can result at the fittings
themselves, at an overlength or at a trial example. Per measurement
and material - for alloyed materials with da> 100 mm
with the same
melt also – at a closed delivery quantity will be tested maximal
4 batches.
5.3.4 At delivery quantities unto 10 of the same fittings, you
have to take a test piece.
5.3.5 At the test pieces will arrange the following assays will bes
tested:
– pull-out test at a room temperature for da> 100 mm.
For fittings with da < 100 mm instead of the pull-out test a
hardness test will be done at 10% of the pieces but at a minimum
of 3 pieces.
With the second batch of a closed delivery the scope of inspection
for a hardness test can be mottled when the calculated values
of the hardness are in the defined closeness
range(reassessment according to Din 50150).
– At fittings which are made by welding with da > 200 mm
additional to a pull-out test across to the weld seam.
– The impact bending test 2) accordant to the values in the
norms of the base materials
– Additional impact bending test in the middle of the weld
seam at by welding manufactured fittings 2)
at the class of material D, E, T and U for da > 200 mm and the
nominal wall thickness > 5 mm,
at class of material F – K for da >= 100 mm and a nominal wall
thickness > 5 mm if a sampling of a non directional assay with a
width of minimal 5 mm is possible.
In class of materials R and S for da > 200 mm and a nominal
wall thickness > 10 mm.
In Class of materials L – Q for da >= 100 mm and a nominal wall
thickness > 12 mm.
– technological bending test at, by welding manufactured fittings.
5.3.6 • • You have to agree in addition at the order:
– The re examination of the chemical composite (product analysis).
It will, per melting, be done at a test piece or at the base
material.
– Hot tensile test for da >= 100 mm, 1 test per batch. The test
temperatures have to be arrange before 3).
– Test of inter-crystalline corrosion . This test can only be done
for the class of materials L – Q.
5.3.7 Beyond that:
– all fittings of alloyesteel have to undergo a test to exclude
any chance of a material confusion
– all fittings have to be controlled upon the look of the surface,
internal and external
– all fittings have to be confirmed in the compliance of the
dimensions and tolerances of dimensions
– all, by welding manufactured fittings, have to be controlled
the weld-seam of a examination assay of steel-iron-test sheet
1916.
5.3.8 At the base material carried out ultrasonic and radiographic
tests, for the raw material and the weld seam, don´t have
to repeated at the fitting.
5.3.9 •• An examination of the fittings can be agreed, but keep
in mind that the fitting dimensions and the fitting forms can
affect the test results.
5.3.10 For the chemical analysis the manufacturer has to attest
the correctness of the base material, the cast analysis per melt
or casting device according to the in the base material defined
values and variations.
This attests can be take over for the certificate of the fittings
1) look to table 6, gloss 7
2) look to table 6, gloss 1
3) look to table 6, gloss 2
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Butt-Weld Fittings
Fittings for welding DIN 2609
5.4 Sampling and sample preparation
5.4.1 pull-out test
For the pull-out test the fitting will undergo a tensile strength test
lengthwise according to DIN 50125. The assay will not be heat treated
and internally of the gauge length not adjusted.
At fittings with a external diameter of da > 200 mm can – if the test
pieces allow it without being adjusted- treated round- or flat specimen(look
to DIN 50125), be removed as transverse test specimen.
5.4.2 Beam impact test
For the beam impact test at the fitting you take per fitting 1 set ISO-
V-samples, in being of 2 specimen as transverse test specimen (if for
the class of material F – K in the norms for the base material, according
to table 2, not act up another specimen shape) when the fittings
allow it without adjusting, otherwise you have to take longitudinal
test specimen.
For the beam impact test in the middle of the weldseam, you have
to take from the fitting 1 set ISO-V-samples, across the weld seam,
consisting of 3 specimen.
You have to take the assays in a way that the notch axis lies vertically
to the fitting surface and at the, in the weld seam to taking assays in
the middle of the weld seam.
5.4.3 Technological bending test
For the technological bending test, for welded fittings produced
from sheet, you take per batch 2 test fittings across to weldseam,
with the weldseam in the middle. Here you have to consider the
details accordimg DIN 50120 part 1.
5.4.4 Chemical composition
If the chemical composition as product analysis was not tested at
base material, after the agreement of the norms of the base material,
you have to take an assay at a test piece of the fitting according
to the steel test specification 1805.
5.5 Accomplishment of the assay
5.5.1 The pull-out test at the fitting is to be arranged at the fitting
according to DIN 50145. The pull-out test across the weldseam is
arranged with assays according to DIN 50120 part 1/09.75, picture 1
and DIN 50120 part 2/08.78, picture 2. If the certificate was agreed
at 0,2%- 0,1%- of the creep limit with higher temperatures, it´s
ascertain according to DIN 50145.
5.5.2 The beam impact test is to be arranged according to DIN 50115,
each at the for the concerning materials named lowest temperatures
of norms from base material.
5.5.3 The technological bending test, at by welding manufactured
fittings, is to be arrange according to DIN 50121 part 1. An Assay is to
be tested at the outside of the fitting and the other at the inside of
the fitting in the tensile zone.
5.5.4 The hardness test is to be arrange according to DIN 50351 once
per each fitting.
5.5.5 The examination of the weldseam is to be arrange according
to the steel test specification 1916.
For the non-destructive test of the fittings, consider the agreement
of the steel test specification 1915 and/or 1918 and/or 1919.
•• The inspection conditions of surface crack test according to the
magnetic powder test or the test method of colour introducing
have to be agreed.
5.5.6 The look of the fittings is to be tested by an inspection with normal
visual acuity and with adapted illumination.
5.5.7 The dimensions of the fittings have to be tested with an adapted
measuring instrument.
5.6 Re-qualification
For re-qualification consider DIN 17010.
5.7 Certificate about material control
5.7.1 For fittings without inspection a certificate will be exposed
according to DIN 50049 – 2.2.
5.7.2 4.1.1 For fittings with inspection will be exposed, depending on
the agreement at the order (chapter 5.1) a certificate according to
DIN EN 10204 3.1 or 3.2. The form and area of the assay, the competence
for the accomplishment of the assays and the form the of the
assay have to be considered, certificates are named in table 6.
5.7.3 The identification according to chapter 6 must be obvious on
certificate. To find the affiliation of the test result to the different
deliveries and test units, all features of the certificates must be
obvious.
•• Details in the certificates about the manufacturing process and
the heat treatment, at welded fittings additionally about the welding
process and welding consumable have to be arranged separately.
6 Marking
The fittings have to be marked everlasting and clearly as the following:
– sign of manufacturer
– letter of the class of material and material short-name or number
of base material (the details of the base material can drop
to fittings with =

Butt-Weld Fittings
Fittings for welding DIN 2609
11.2007_1.000
Table 6. Schema about the scope of inspection and certificate about admeasurement assay at tittings with certificate.
assay scope of inxpection for the proper form of
accomplishment
certificate about
Nr Art chapter the assays material control
1 cast analysis 4.3 per melt or casting device manufacture of DIN 10 204 – 2.2 4)
the base material
2 pull-out test at 5.3.5 per batch at two test pieces for the class of materials H – Q and U, at one by appointment DIN 10 204 – 3.1 A or
room temperature test piece for class of materials A – G and R – T and at delivery quantity DIN 10 204 – 3.1 B or
100mm.maximal 4 batches per delivery DIN 10 204 – 3.1 C
quantity will be checked. At, by welding manufactured fittings, with da
>200 additionally one assay across the weld seam.
3 impact test 1) 5.3.5 per batch according to 2 of these table, 1 set >=3 single tests, according by appointment DIN 10 204 – 3.1 A or
to the details in the norms of the base material for da>=100 mm.
DIN 10 204 – 3.1 B or
Additionally at by welding manufactured fittings 1 set = 3 single tests in
DIN 10 204 – 3.1 C
the middle of the weld seam.
in class of material D,E,E,U from da> 200mm and wall thickness >=5mm
in class of material F – K from da> 100mm and wall thickness >=5mm
when the extraction of a omnidirectional assay with minimal 5 mm
breadth is possible
in class of material R,S from da> 200mm and wall thickness >=10mm
in class of material L - Q from da> 100mm and wall thickness >=12mm
4 technological 5.3.5 per batch at one test set by appointment DIN 10 204 – 3.1 A oder
beam impact test 3)
DIN 10 204 – 3.1 B oder
DIN 10 204 – 3.1 C
5 hot tensile 5.3.6 1 test pe-batch for d a ≥ 100 mm by appointment DIN 10 204 – 3.1 A oder
test 5),2)
DIN 10 204 – 3.1 B oder
DIN 10 204 – 3.1 C
6 examination 5.3.7 all fittings manufacturer DIN 10 204 – 3.1 B
of the
weld beam 3)
7 spectro-chemical 5.3.7 all fittings of alloyed materials manufacturer DIN 10 204 – 2.1 4)
analyis
8 inspection 5.3.7 all fittings by appointment DIN 10 204 – 3.1 A oder
DIN 10 204 – 3.1 B oder
DIN 10 204 – 3.1 C
9 dimensional 5.3.7 all fittings by appointment DIN 10 204 – 3.1 A oder
check
DIN 10 204 – 3.1 B oder
DIN 10 204 – 3.1 C
10 product analysis 5) 5.3.6 1 productanalysis per melting Manufacturer of the DIN 10 204 – 3.1 B
material or
the fittings
11 examination 5.3.9 per melt by agreement manufacturer DIN 10 204 – 3.1 B
of the base
material 5)
www.rofi.de
12 assay of 5.3.6 according to agreement manufacturer DIN 10 204 – 3.1 B
intercrystaline
5), 6)
corrosion
13 hardness test 5.3.5 just at da

Butt-Weld Fittings
Fittings for welding DIN 2609
Cited norms and other documents
DIN 1626 Welded circularly tubes of unalloyed steels for special
requirements; technical conditions of delivery
DIN 1629 Seamless circularly tubes of unalloyed steels for
special requirements; technical conditions of
delivery
DIN 2559 part 1 Preparation of the weld seam, guidelines for face
form, melt welding of scarf joints at steel tubes
DIN 2605 part 1 Fittings for welding, Elbows, reduced utilisation
DIN 2605 part 2 Fittings tor welding, Elbows, full utilisation
DIN 2615 part 1 Fittings for welding, Tees, reduced utalisation
DIN 2615 part 2 Fittings tor welding, Tees, full utilisation
DIN 2616 part 1 Fittings for welding, Reducer, reduced utilisation
DIN 2616 part 2 Fittings for welding, Reducer, full utilisation
DIN 2617 Fittings for welding, caps
DIN 8563 part 1 Safeguarding of quality from welding, general
fundamentals
DIN 8563 part 2 Safeguarding of quality from welding, requirements
of the company
DIN 8563 part 3 Safeguarding of quality from welding, fusion
welded joint at steel (unless steel welding), requirements,
assessment group
DIN 17010 General technical conditions of delivery for steel and
steel products
DIN 17100 General steel, quality standard
DIN 17102 Fine grained steel which is able to weld, normalized,
technical conditions of delivery for sheet, band steel,
wide flat steel, sections and bars
DIN 17103 Forgings of fine grained steel which is able to weld,
technical conditions of delivery
DIN 17155 Sheets and bands of heat resisting steels, technical
conditions of delivery
DIN 17172 Steel tubes for pipelines for flammable fluid and
gases, technical conditions of delivery
DIN 17173 Seamless circularly tubes of low-temperature steels,
technical conditions of delivery
DIN 17174 Seamless circularly tubes of heat resisting steels,
technical conditions of delivery
DIN 17175 Seamless tubes of heat resisting steels, technical
conditions of delivery
DIN 17177 Electrical pressure-welded tubes of heat resisting
steels, technical conditions of delivery
DIN 17178 Welded circularity tubes of fine grained steels for
special requirements, technical conditions of delivery
DIN 17179 Seamless circularity circularity tubes of fine grained
steels for special requirements, technical conditions
of delivery
DIN 17243 Forgings and rolled and forged bars of heat resisting
steels which is able to weld, technical conditions of
delivery
DIN 17280 Low-temperature steels, technical conditions of
delivery for sheets, band steel, wide flat steel,
sections, bars and forgings
DIN 17440 Non-rusting steels, technical conditions of delivery
for sheets, hot rolled strip, wire rod, drawn wire, bars,
forgings and half finished products
DIN 17457 Welded circularly tubes of austenitic stainless steels
for special requirements, technical conditions of
delivery
DIN 17458 Seamless circularly tubes of austenitic stainless
steel steels for special requirements, technical
conditions of delivery
DIN 10204 Certificate of material control
DIN 50115 Assay of metallic materials, beam impact test
DIN 50120 part 1 Assay of steel, pull-out test at welded connections,
melt welded butt joints
DIN 50120 part 2 Assay of steel, pull-out test at welded connections,
pressure welded butt joints
DIN 501121 part1 Assay of metallic materials, technical pull-out test at
welded connections and welded plating, melt
welded connections
DIN 50125 Assay of metallic materials, tensile specimen
DIN 50145 Assay of metallic materials, pull-out test
DIN50150 Assay of steels and cast steel, table of reassessment
for Vickers hardness, Brinell hardness, Rockwell
hardness and tensile strength
DIN 50351 Assay of metallic materials, hardness test according
Brinell
DIN 50914 Assay of non-rusting steels of consistency forward
inter-crystalline corrosion, copper sulphatesulphuric
mode, Strauß-test
AD-data sheat HP7/2 *) heat treatment, ferritic steels
AD-Merkblatt HP7/3 *) heat treatment, austenitic steels
Steel test specification 1805 **) sampling and sample preparation for
product analysis of steels
Steel test specification 1915 **) ultrasonic test of longitudinal imperfection
of tubes at heat resisting steels
Steel test specification 1916 **) non-destructive test of melt welded
pipelines for flammable fluids and gases
Steel test specification 1918 **) ultrasonic test of transverse defect of
tubes of heat resisting steels
Steel test specification 1919 **) ultrasonic test of lamination at tubes
of heat resisting steels
Technical rules pressure tank (TRB) *)
Technical rules for steam boiler (TRD) *)
Establishment about pressure tank, compressed gas container and
charging annex
(Pressure tank establishment and general administrative instructions*)
Establishment about steam boiler constructions (steam boiler establishment
) and general administrative instructions *)
International patent classification
B 23 K
F 16 L 43/00 F
16 S 1/00
*) To referring by: Beuth Verlag GmbH/ Berlin
**) To referring by: Verlag Stahleisen mbH/Düsseldorf
11.2007_1.000
4/10
RO-FI Precision in Stainless Steel

Butt-Weld Fittings
Caps DIN 2617
measures in mm
1 Coverage
This norm consider for caps of steel which resist to the
same internal pressure like the welded tube with a wall
thickness s1 according to table 1 (see chapter 5 – basics of
the calculation). The caps will be used as fittings to weld in.
2 Type of design, description
curved part
cylindrical arrection
11.2007_1.000
Denotation of a cap according to this norm of a external
diameter da = 88,9 mm and a wall thickness s1 = 2,3 mm,
at a material of the material group C according to DIN
2609:
Cap DIN 2617 – 88,9 x 2,3 – C
4/30
RO-FI Precision in Stainless Steel

Butt-Weld Fittings
Caps DIN 2617
11.2007_1.000
3 dimensions Table 1.
nom.- external wall thickness s 1, s 2 height limited wall
width diameter line h thickness
DN d a 1 2 3 4 5 s 1 ≤ limited s 1 > limited for height
1)
s 1
2)
s 2
1)
s 1
1)
s 1
1)
s 1
1)
s 1 wall thickn. wall thickn. h
15 21,3 1,6 – – 2,0 3,2 4,0 25 25 –
20 26,9 1,6 – – 2,3 3,2 4,0 25 25 –
25 33,7 2,0 – – 2,6 3,2 4,0 38 38 –
32 42,4 2,0 – – 2,6 3,6 4,0 38 38 –
40 48,3 2,0 – – 2,6 4,0 5,0 38 38 –
50 60,3 2,0 – – 2,9 4,5 5,6 38 38 –
65 76,1 2,3 – – 2,9 5,0 7,1 38 38 –
80 88,9 2,3 – – 3,2 5,6 8,0 51 51 –
100 114,3 2,6 – – 3,6 6,3 8,8 64 64 –
125 139,7 2,6 – – 4,0 6,3 10,0 76 76 –
150 168,3 2,6 – 4,0 4,5 7,1 11,0 89 89 –
200 219,1 2,9 – 4,5 6,3 8,0 12,5 102 102 –
250 273,0 2,9 – 5,0 6,3 8,8 14,2 127 127 –
300 323,9 2,9 3,0 5,6 7,1 10,0 16,0 152 152 –
350 355,6 3,2 3,3 5,6 8,0 11,0 17,5 165 165 –
400 406,4 3,2 3,4 6,3 8,8 12,5 20,0 178 178 –
450 457,0 4,0 4,1 6,3 10,0 14,2 22,2 203 203 –
500 508,0 4,0 4,2 6,3 11,0 16,0 25,0 229 229 –
600 610,0 5,0 5,1 6,3 12,5 17,5 30,0 267 267 –
700 711,0 5,0 5,3 7,1 12,5 20,0 32,0 267 290 25,0
800 813,0 5,6 5,9 8,0 12,5 22,5 36,0 267 330 17,5
900 914,0 6,3 6,7 10,0 12,5 25,0 40,0 267 370 10,0
1000 1016,0 6,3 7,0 10,0 12,5 28,0 45,0 305 420 14,2
1200 1220,0 6,3 7,2 12,5 – – – 343 360 10,0
A line in the column s1 means that this wall thickness is not
normed.
1) s 2 ≥ s 1 (see gloss 2)
2) In rank 1 of the wall thickness the nominal width DN 300 till
DN 1200 the wall thickness s2 have to comply minimal at
the in the column s2 named values.
4 Acceptable dimension variations
Table 2. lower limiting-sizes of the wall thickness
(upper limiting-size see DIN 2609)
nominal width wall thickness lower
DN
limiting-size
≤ 600 all -12,5 %
> 600 ≤ 10,0 -0,35 mm
> 10,0 -0,50 mm
5 Backgrounds of the calculation
The wall thickness s2 is according to AD-leaflet B3 so calculated
that the caps resist to the same internal pressure like
the to welding tube with a wall thickness s1 according to
table 1. The headroom h contains a cylindrical accretion of
minimal 3 x s1. The calculation results towards the internal
pressure with following assumptions:
- lower limiting-size for tubes and caps according to table 2
- same material
- same longitudinal seam welding factor
- same external diameter
- without corrosion allowance
- Utilisation of the tube = 100%
www.rofi.de
Table 3. limiting-sizes of the dimensions l 1
nominal width
limiting-size
DN
h
15 to 100 ± 4
125 to 600 ± 7
700 to 1000 ± 10
6 Differing wall thickness
Caps with a wall thickness which are between the wall
thickness of table 1 can also be order to the agreement of
this norm.
RO-FI Precision in Stainless Steel
4/31

Butt-Weld Fittings
Curved heads DIN 28011/cap form
measure in mm
1 Coverage
This norm is to use for curved heads in cap form (bumped
boiler heads) with following connections:
r 1 =d a r 2 =0,1d a h 1 ≥ 3,5 s 1) h 2 =0,1935d a -0,455s
This norm consider for one piece heads with and without
weld seam with a external diameter da=>4000 mm and
a wall thickness s =< 50 mm.
#For heads in larger dimensional range consider analogously
the Scope of this norm, at which the tolerance -
especially at heads of sections- have to arrange extra.
Curved heads, elliptical head see DIN 28013.
The calculation of the necessary wall thickness results for
example:
- for pressure tanks according to the technical rules of
pressure tanks (TRB, AD-leaflets)
- for steam boilers according to the technical rules of
steam boilers (TRD)
2 Type of design, description
2.1 Geometrical connections
11.2007_1.000
curved part
picture 1
s = wall thickness, see Section 3.4.5
Capacity of the curved part (without boarding height h1) V ≈ 0,1 (d a - 2s) 3
2
External surface of the curved part (without boarding height h1) A a ≈ 0,99 • d a
Internal surface of the curved part (without boarding height h1) A i ≈ 0,99 • (d a - 2s) 2
Reference line will be measured out of the finished kerb with h1 according to table 1
At the order the designation of the reference line can be arrange.
4/32
RO-FI Precision in Stainless Steel

Butt-Weld Fittings
Curved heads DIN 28011/cap form
Table 1.
wall thickness
height
weight
11.2007_1.000
www.rofi.de
• external diameter of the tube of the line 1 according to DIN 2448
1) The height of the cylindrical collar at caps averages h1= 4000 mm the values have
to calculate according to chapter 1 and 2
RO-FI Precision in Stainless Steel
4/33

Butt-Weld Fittings
Curved heads DIN 28011/cap form
2.2 Angles
form R form I form VA form VI form DV
(as yet IR) (as yet IP) (as yet XS)
I-seam V-seam V-seam DV-seam
raw plan outside inside (symmetrical)
form 2/3 DV form YA form YI form DY form U
(as yet XA) (as yet YD) (as yet US)
2/3-DV-seam Y-seam Y-seam double Y-seam U-seam
(asymmetrical) outside inside (bevel) bell seam
form DU form BI form BA
(as yet ID) refilling refilling
double-U-seam inside outside
11.2007_1.000
picture 2
Processing of the angles mechanical or by flame cut. The dimensions
c, f and x have to arrange at the order, also the angle and
radii as far as they don´t comply to picture 2. Other preparation
for the weldseam have to arrange with outlines at the order.
2.3 Description
Description of a cap with a external diameter da= 600 mm and
wall thickness s= 20 mm with a angle form VA of steel HII according
to DIN 17155:
head DIN 28011 – 600 x 20 – VA – HII
Description of a cap with a external diameter da= 600 mm and
a minimal wall thickness smin= 19,5 mm with the angle form
VA and BI with x = 15 mm of the steel breed HII according to
DIN 17155:
head DIN 28011 – 600 x 219,5 MIN – VA BI – 15 HII
3 Technical conditions of delivery
3.1 material
As material can be arrange:
- hot-rolled products of unalloyed steels according to DIN EN
10025
- heat resisting steels according to DIN 17155
- non-rusting steels according to DIN 17440 or to the steel
test specification 400
- fine grain steel which is able to weld according to DIN 17102
- low-temperature stells
- plated steels according to the DIN norms,
- high heat resisting and AD-leaflet, VdTÜV-material
heat resisting steels
sheet, steel test specification
- special alloys
- non-ferrous metals
- materials according to other national and international regulations
4/34
RO-FI Precision in Stainless Steel

Butt-Weld Fittings
Curved heads DIN 28011/cap form
3.2 Manufacturing and heat treatment
The heads will be hot or cold formed according to the
choice of the manufacturer if the kind of the form was
not arrange before. The heat treatment have to arrange,
for example according to the AD-leaflet of the line HP7.
The manufacturer have to indicate if a head will be
manufactured of several parts (before or after forming).
3.3 Surface Condition
Floors are supplied with untreated surface. Other surface
conditions, such as descaled, pickled, blasted, are to be
agreed.
This height dimensions consider for heads with arranged
kerbs. At heads with crude kerbs (form R) the hight h3 have
to measured so that later all other forms of this norm have
to be manufactured.
3.4.2 Limiting-size for the ad-measurement
Limiting-sizes for the ad-measurement are arranged in
table 2.
11.2007_1.000
3.4 Limiting sizes
3.4.1 Limiting sizes for the internal height h3
For the height h3 = h1 + h2 the limiting sizes are:
a) the upper dimension : + 0,015 da or +10 mm
b) lower dimension: O
Table 2. Lower limiting-sizes of the wall thickness
(upper limiting-size see DIN 2609)
material da limiting-size for
the admeasurement
Hot-rolled unalloyed steels d a < 100 ± 3,0 mm
Heat resisting steels 100 ≤ d a < 300 ± 4,0 mm
Low temperature steel 300 ≤ d a < 1000 ± 0,4 %
(ferritic untempered) 1000 ≤ d a ≤ 4000 ± 0,3 %
Fine grained steel
Non-rusting steels d a < 100 ± 3,0 mm
Superalloyed steels 100 ≤ d a < 300 ± 5,0 mm
Low temperature steels 300 ≤ d a ≤ 4000 + 0,5 %
(austenitic or tempered) –0,7%
Austenitic plated steels
Plated steels d a < 100 ± 3,0 mm
besides austenitic plated steels 100 ≤ d a < 300 ± 5,0 mm
Nonferrous metals 300 ≤ d a ≤ 4000 ± 1,0 %
www.rofi.de
3.4.3 Limiting-sizes for the non-cirularity u
The non-cirularity u = 2 (d amax-da min)
(damax-d a min )
• 100 in % may just have 1 % maximum;
also may the biggest diameter difference d a max – d a

Butt-Weld Fittings
Curved heads DIN 28011/cap form
3.4.4 Restriction of the tolerances
Lower limiting-sizes for the ad-measurement or the noncirularity
tolerances have to be agree in special case. The
limiting-sizes have to be agree if the caps should be used
in pairs or as internal or external caps.
3.4.5 Limiting-sizes for the wall-thickness
For the limiting-sizes of the wall thickness consider:
If at the order just the wall thickness is given, it can be fall
below as in table 3.
Table 3.
wall thickness
lower measure
≤10 - 0,3
> 10 ≤ 30 - 0,5
> 30 ≤ 50 - 0,8
> 50 - 1,0
If in the order the minimum wall thickness is required, it
doesn´t may fall below.
(For the boarding height h1 in such cases consider instead
of the wall thickness s the minimum wall thickness s min.
For s min consider the value without decimal places).
For the compliance of the required wall thickness or rather
minimum wall thickness because of the production
causes you have to provide that the accordant thickness
surcharges for the slug of the sheet. Beyond that is a bigger
wall thickness, especially in the area of the cylindrical
board (compression) possible. A refilling has to act up in
the order (form BI or BA according to chapter 2.2)
3.5 Appointment of ad-measurement
3.5.1 Position for the appointment of ad-measurement
a) At heads with arranged kerbs at the border
b) At heads with crude kerbs at the area between upper
and lower limiting size of h3 of the height-related tolerance,
according to chapter 3.4.1.
3.5.2 Appointment of the external ad-measurement
With calibrated measuring strip according to DIN 6409,
the ad-measurement will be measured at the in chapter
3.5.1 denoted area. At the calculation of the diameter you
have to locate with 3,14159.
3.5.3 Appointment of the internal ad-measurement
a) ) Measuring of the external ad-measurement how described
in chapter 3.5.2, less of the middle wall thickness
which will be appoint of the arithmetical media of the
ad-measurement of the wall thickness at the place of
the measuring of the amount but at minimal 3 points
and at heads with d a > 500 mm all 500 mm or
b) with calibrated rolling dimension.
3.6 Flattening
At the area of the diameter r1 are flattening of the meridian
circle acceptable (at flat areas measured by siting of
a lineal) which has a length of maximal 15% of the diameter
r 1 .
3.7 Skewing of the cylindrical board
widened head
inverted head
11.2007_1.000
Bild 3
4/36
RO-FI Precision in Stainless Steel

Butt-Weld Fittings
Curved heads DIN 28011/cap form
Limiting sizes of the right angle of the cylindrical board
AD-leaflet line HP7 *)
see table 4.
VdTÜV-material-sheet *)*)
Table 4.
da
< 1000 ≤ 4° ≤ 2°
≥ 1000 ≤ 5° ≤ 2°
Steel test specifications (SEW) ****)
Technical rules pressure tank (TRB) ***)
Technical rules steam boiler (TRD) *)
Earlier editions
At the arbitration the measurement has to accomplish
DIN 28012: 10.70
internal (compression).
DIN 28011: 10.70, 05.87
11.2007_1.000
3.8 Certifications
The necessary certifications have to a arrange at the
order, for example according to the technical rules of
pressure tank (TRB), technical rules of steam boiler (TRD).
Cited norms and other documents
DIN 2448
Seamless steel tubes, dimensions,
fibre coarseness
DIN 6403
Measuring tapes of steel
DIN 17102
Fine grained steel which is able to
weld, normal annealed, technical
conditions of delivery for sheet-,
Modifications
Compared to edition in may 1987 were changed:
a) Changed nominal width in the wall thickness s and
second example of appellation for the indication of the
minimum wall thickness s min
b) Changed capacity in volume
c) Overworked editorial and technical standardisation
International patent classification
B 01 J 3/04
B 65 D 90/02
F 22 B 37/22
F 16 J 12/00
www.rofi.de
stripe-, wide-flat-, form- and bar steel
DIN 17155
Sheet and stripe of heat resistant
steels, technical conditions of delivery
DIN 17440
Non rusting steels, technical conditions
of delivery for sheet, hot rolled
stripe, wire rod, drawn wire, bar steel,
forgings and half finished products
DIN 28013
Arced heads, elliptical head
DIN EN 10025
Hot rolled products of unalloyed
steels, technical conditions of delivery,
German version EN 100025: 1990
RO-FI Precision in Stainless Steel
4/37

STAINLESS STEEL
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STAINLESS STEEL
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RO-FI Precision in Stainless Steel
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durch Qualitätsmanagement
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by quality
management
Reliability by quality management - ISO 9001
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