Een toonaangevende fabrikant van Naadloze Boilerstalen Buizen in China, biedt hoogwaardige buizen van de stalen warmtewisselaar, naadloze koolstofboilerbuis, gelegeerd stalen ketelbuis
Seamless Boiler Steel Tubes worden geproduceerd door Cold Drawn Seamless Processing,
met staalkwaliteit van Low Carbon Steel, Medium Carbon Steel, Alloy Steel etc.
Technische normen als
ASTM A179, ASTM A192, ASTM A210, ASTM A213, ASTM A334, ASTM A335 enz
DIN17175, EN10216-2, GB / T 5310, BS3059, etc.
Staalkwaliteit:
Carbon Steel Grade:
ST35.8, ST37.0, ST44, ST52;
E155, E195, E215, E235, E275, E355;
195GH, P235GH, P265GH, P195TR1, P195TR2, P235TR1, P235TR2, P265TR1, P265TR2;
SAE1010, SAE1020, SAE1026, SAE1035, SAE1045;
Koolstofstaalbuis: SA178, A179, A192, A210, SA213, SA214, enz.
Legering staal grade:
T2, T5, T9, T11, T12, T17, T21, T22, T91, T92, 15Mo3,16Mo3, 13CrMo44;
SAE4130, SAE4140, 40Cr, 40Cr4, 10CrMo910, 12CrMo910, 11CrMo910,
25CrMo4, 35CrMo, 35CrMo4, 42CrMo4, 34CrMo4, 20MnV, 20MnV6,20CrMn, 12Cr1MoVG;
Productnaam : TORICH GB / T20409 20G 20MnG 25MnG SA210 SA213 Multi-rifled Hogedrukketel Naadloze stalen buizen
Standaard : GB / T20409
OD: 3-420 mm
WT: 0,5-50 mm
Lengte : 8-12 m of volgens de daadwerkelijke toepassing en productie van de klant.
Toepassing : Hogedrukketel
Staalkwaliteit : 20G 20MnG 25MnG SA210 SA213
Technologie : warmgewalst, koudgewalst, koud getrokken
Kenmerk:
Goede rondloopnauwkeurigheid
Goede oppervlaktekwaliteit
Goede OD- en ID-tolerantie
Hoge precisie
Stabiele kwaliteit
Gladde ruwheid
KWALITEITSBORGING VAN TORICH
Tabel 6 Mechanische eigenschappen in lengterichting van interne schroefbuizen bij kamertemperatuur
|
Number
|
Grade
|
tensile strength
RM
MPa(N/mm2 )
|
Lower yield strength
ReL /MPa((N/mm2)
|
Elongation
A/%
|
Impact energy
AKV /J
|
|
Not less than
|
|
1
|
20G
|
410~550
|
245
|
24
|
35
|
|
2
|
20MnG
|
≥415
|
240
|
22
|
35
|
|
3
|
25MnG
|
≥485
|
275
|
20
|
35
|
|
4
|
12CrMoG
|
410~560
|
205
|
21
|
35
|
|
5
|
15CrMoG
|
440~640
|
235
|
21
|
35
|
Tabel 4 De kwaliteit en chemische samenstelling van staal
|
Number
|
Brand
|
chemical
composition(mass fraction)/ %
|
|
C
|
Mn
|
Si
|
Cr
|
Mo
|
S
|
P
|
|
1
|
20G
|
0.17~0.23
|
0.35~0.65
|
0.17~0.37
|
--
|
--
|
≤0.020
|
≤0.025
|
|
2
|
20MnG
|
0.17~0.23
|
0.70~1.00
|
0.17~0.37
|
--
|
--
|
≤0.020
|
≤0.025
|
|
3
|
25MnG
|
0.22~0.29
|
0.7~1.00
|
0.17~0.37
|
--
|
--
|
≤0.020
|
≤0.025
|
|
4
|
12CrMoG
|
0.08~0.15
|
0.40~0.70
|
0.17~0.37
|
0.40~0.70
|
0.40~0.55
|
≤0.020
|
≤0.025
|
|
5
|
15CrMoG
|
0.12~0.18
|
0.40~0.70
|
0.17~0.37
|
0.80~1.10
|
0.40~0.55
|
≤0.020
|
≤0.025
|
|
Note1:Residual element
content of 20G.20MnG.25MnG
should satisfy: Cu≤0.20%.Cr≤0.25%.Ni≤0.25%.V≤0.08%.Mo≤0.15%;The remaining elements of other
brands should satisfy: Cu≤0.20%.Ni≤0.30%.
Note2:The acid soluble
aluminum in 20G steel should not be more than 0.010%.
Note3:The nitrogen content
of the steel produced by the oxygen converter plus the refining of the
furnace should not be more than 0.008%.
|
De grootte van de interne schroefbuizen en de toegestane afwijking van de schroefdraadparameters
|
Code
|
Project
|
[A" teeth types
allowable deviation
|
[B" teeth types
allowable deviation
|
|
A
|
O.D≤38.1mm
38.1mm＜O.D＜50.8mm
50.8mm≤O.D≤63.5mm
O.D≥63.5mm
|
±0.15mm
±0.20mm
±0.25mm
±0.30mm
|
--
|
|
B
|
O.D≤38.1mm
38.1mm＜O.D＜50.8mm
50.8mm≤O.D≤63.5mm
O.D≥63.5mm
|
--
|
±0.15mm
±0.20mm
±0.25mm
±0.30mm
|
|
C
|
I.D of the root of the screw
Thread:
O.D-(1.11×Minimum W.T×2)
O.D≤38.1mm
38.1mm＜O.D＜50.8mm
50.8mm≤O.D≤63.5mm
O.D≥63.5mm
|
±0.15mm
±0.20mm
±0.25mm
±0.30mm
|
±0.15mm
±0.20mm
±0.25mm
±0.30mm
|
|
E
|
Minimum I.D
|
Negative deviation to
zero
|
Negative deviation to
zero
|
|
F
|
Minimum W.T
|
+22%
0
|
+22%
0
|
|
G
|
Thread tips
|
--
|
--
|
|
I
|
Thread top width
|
--
|
--
|
|
Ja
|
Height of thread:
O.D≤38.1mm
38.1mm＜O.D＜50.8mm
50.8mm≤O.D≤63.5mm
O.D≥63.5mm
|
±0.3mm
|
±0.18mm
±0.20mm
±0.23mm
±0.28mm
|
|
K
|
Side Angle of thread.
|
±15°
|
±15°
|
|
O
|
radius of rounded corner
at the root of thread
|
--
|
--
|
|
M
|
Thread pitch
|
±3.2mm
|
±3.2mm
|
|
N
|
Thread lead
|
±3.2mm×thread tips
|
±3.2mm×thread tips
|
|
Qb
|
Helix angle
|
Rating
|
Rating
|
|
T
|
Thread top width (axial)
|
±1.3mm
|
±1.3mm
|
|
U
|
Thread top (axial)
groove width
|
--
|
--
|
|
a. For the B type, the maximum deviation of any thread height can
exceed the allowable deviation specified in the table, but it should not
exceed the allowable deviation of 0.08mm, and the average height of all
threads should be in line with the given deviation range.
b. The rating is based on the axis of the pipe.
|
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