UDC 621.643.2-034 TSCHE NORM July 1985 14.018.8:663/664
stainless steel pipes DIN
for the food industry 11850
dimensions , materials
superdes
11.76.edition
Dimensions in mm
1.Field of application
This standard shall apply to dimensions ,material ,internal and external surface quality and marking of amless and welded stainless steel pipes for pipeline systems in the food industry .It shall apply in conjunction with 17456 to amless pipes and DIN 17455 to welded pipes .
2.Dimension
The dimension and permissible deviations of the pipes are listed in Table 1
Table 1
Series tolerance Nominal
diameter DN
1 2 3 OD.dev Wall thickness.dev
Weight
Kg/m(7.97k
g/dm3)
remark 12 ±0.12 1.0 ±10% 0.27
profit13±0.3 1.5 ±10% 0.43
10
14±0.3 2.0 ±10% 0.60
18 ±0.12 1.0 ±10% 0.42
19±0.3 1.5 ±10% 0.66 15
20±0.3 2.0 ±10% 0.90
22 ±0.12 1.0 ±10% 0.51
23±0.3 1.5 ±10% 0.81 20
24±0.3 2.0 ±10% 1.10
28 ±0.15 1.0 ±10% 0.66
29±1% 1.5 ±10% 1.03 25
30±0.3 2.0 ±10% 1.40
34 ±0.15 1.0 ±10% 0.82
35±1% 1.5 ±10% 1.26 32
36±1% 2.0 ±10% 1.70
40 ±0.2 1.0 ±10% 0.97
41±1% 1.5 ±10% 1.50 40
42±1% 2.0 ±10% 2.00
52 ±0.2 1.0 C10% 1.26
53±1% 1.5 ±10% 1.90 50
54±1% 2.0 ±10% 2.60 65 70 ±0.3 2.0 ±10% 3.43 80 85 ±0.3 2.0 ±10% 4.16 100 104±0.3 2.0 ±10% 5.03 125 129±0.4 2.0 ±10% 6.36 150 154±0.4 2.0 ±10% 7.49
考研政治答题卡Pipes with greater wall thickness than according to ries 1 shall be lected from existing pipe standards for this nominal diameter range
The permissible deviations shall be
determined from the
circumference.
the permissible ovality shall be ±1% on the pipe outside diameter
Associated pipe unionknown
Series 1 : for rolling (up to DN 100 ) and butt welding Series 2 and ries 3 : for butt welding
3.designation and order
3.1details shall be specified in the following quence in the designation
for pipes according to this standard:
_ Name ( pipe )
_ DIN number of this dimension standard ( DIN11850 )
_ Characteristic dimensions of the pipe . pipe outside diameter x wall thickness ( e Table 1 )
_ DIN number of the technical specification ( welded pipes DIN17455 , amless pipes DIN 17456 )
_ Material number for the steel grade
_ Abbreviation for the surface quality (e Table 2 )
Example :
Designation of a welded pipe according to this standard with a pipe outside of 40 mm and a wall thickness of 1 mm conforming to the technical specifications according to DIN 17455 made of steel ( material number 1.4301 ) surface quality finish BB:
Pipe DIN 11850-40×1
DIN 17455-1.4301-BB
accordion3.2 In addition to the standard designation according to paragraph 3.1 the required quality ( e.g. total length of the delivery ) shall be specified in the order.
When ordering the following shall be specified parately:
fixed length
exact length
certificates relating to material tests
according to DIN 50049
Example of order:
1000 m pipe DIN 11850-40×1
DIN17455-1.4301-BB
In fixed length of 6 m
Certificate DIN 50046-3.1B
4 . Material
The following steel grade according to DIN 17455 and DIN 17456 can be ud :
a)standard materials :
X5CrNi1810 –material number 1.4301
X6CrNiMoTi17122-material number 1.4571
b)further materials :
X6CrNiMo17122 -material number 1.4401
X2CrNiMo18143 -material number 1.4435
X6CrNiTi1810-material number 1.4541
5 internal and external surface quality
Table 2
Production method Heat treatment
condition 1)
Surface quality
Abbrevia-
tion for
the finish
Metallically bright
conforming to finish
h or m according to
DIN 17456
AA
metallically
bright
mean
roughness
value
Ra=2.5µm
Ground according to
grain size 400 or
polished
AB
conforming to finish
h or m according to
DIN 17456
AC
Seamless
according to 17456(technical specifications)
Heat treated
metallically
bright
mean泰文翻译
roughness
value
Ra=1.6µm
小不点学英语Ground according to
grain size 400 or
polished
AD heat treated
Metallically bright
conforming to finish
K2or K3 according
to DIN 17455
少儿口才培训
BA not heat treated
Metallically bright
conforming to finish
K0 andK1 according
to DIN 17455
CA
heat treated BB not heat treated
metallically
bright全日制英语培训
from nominal
diameter
DN25 weldcabazon
leveled to wall
thickness and
smoothed
mean
roughness
Ra=2.5µm weld
area excluded
Ground according to
grain size 400 or
polished
CB
heat treated
Metallically bright
conforming to finish
K2K3,I1orI2accordi
ng to DIN 17455
BC not heat treated
Metallically bright
conforming to finish
K0 andK1 according
to DIN 17455
CC
heat treated BD
W elded according
to DIN 17455
(Technical
specifications)
not heat treated metallically
bright
mean
roughness
Ra=0.8µm
weld area
Ra=1.6µm
Ground according to
grain size 400 or
戆直
polished
CD
1)insofar as pipes are envisaged for further processing by shaping (e . g . bending),
preferably pipes in the heat treated condition shall be ordered.
2)pickled surfaces with finishes h according to DIN 17456,K1,K2 or I1 according to DIN
